WO2024012208A1

WO2024012208A1 - View navigation method and apparatus

Info

Publication number: WO2024012208A1
Application number: PCT/CN2023/103589
Authority: WO
Inventors: 李明锦; 陆翔; 王伟; 袁传杰; 刘灿; 王乐
Original assignee: 苏州浩辰软件股份有限公司
Priority date: 2022-07-14
Filing date: 2023-06-29
Publication date: 2024-01-18
Also published as: CN115168925B; CN115168925A; CN118051966A

Abstract

A view navigation method for a three-dimensional scene, comprising the steps of: displaying a three-dimensional scene or three-dimensional model; displaying a three-dimensional representation of a view navigation apparatus, the three-dimensional representation comprising a plurality of first operation planes corresponding to different standard view surfaces of the three-dimensional scene or three-dimensional model, the first operation planes being used for reflecting a user coordinate space, each of the first operation planes corresponding to a view orientation of one standard view surface, and the first operation planes corresponding to the corresponding standard view surfaces both spatially and functionally; and in response to any operation plane selected by a user, taking as a current view orientation a view orientation corresponding to the operation plane selected by the user, and reorienting the three-dimensional scene or three-dimensional model so as to display a standard view surface of the three-dimensional scene or three-dimensional model in the current view orientation. The method is simpler and more convenient in terms of operation and use.

Description

View navigation method and device

priority application

This application claims the priority of Chinese application CN2022108337997 submitted on July 14, 2022. The full text of this priority Chinese patent application is incorporated by reference.

Technical field

The invention relates to a method and device for view navigation of a three-dimensional scene or a three-dimensional model in a computer-aided design (CAD) system.

Background technique

Many computer systems process graphics data to display models of objects on the screen. For example, a computer-aided design ("CAD") system may display a graphical model of a physical object to be designed. Often, users need to change the view of the model displayed on the screen. For example, in a CAD environment, users want to be able to view the model from different angles or different directions to better see the shape, size, and construction of the model. In order to change the view of the model on the screen, the user can view it by rotating the model; or, the user can select preset viewpoints such as "top view" and "side view" commonly used in the field of drawing and design through the menu; or, the user can The view of the model is manipulated by manipulating the direction of the cube in the ViewCube on the screen, and combined with the ring surrounding the cube to manipulate the four directions of the model in the southeast, northwest and northwest. For example, US Patent No. US20130332889 discloses a configurable view box (VIEWCUBE) controller, which sets a cube to view the camera angles of the existing scene or model in the viewport, for example, from the front, back, View the scene/model from left, right, upper left, upper right and other perspectives. For another example, the Korean invention patent No. KR101491035 discloses a 3D model view navigation device, which uses a cube covering the 3D model as the view navigation device, and uses the faces, edges, and vertices of the cube as manipulation objects. .

Although the existing ViewCube can position some view directions, such as six views and isometric views, these view switching operations still have some shortcomings in convenience. For example, in the actual operation process, the system first needs to identify whether the user is hovering on a specific line segment or the corresponding vertex on the edge, and then determine whether the hovering time reaches a threshold. If the threshold is reached, it is considered that the user has selected the corresponding edge or vertex. vertex, and then switch the view direction. From a computer perspective, this undoubtedly increases the amount of calculations and power consumption of the computer. From a user's perspective, on the one hand, cubes are usually relatively small because they cannot affect the drawing interface. Therefore, it undoubtedly adds a certain degree of difficulty for users to accurately click on the corresponding edges or vertices with the mouse. On the other hand, for new users who are not familiar with the system, it requires the user to fully study and understand the cube before they can know the view switching function of each operating area of the cube (such as points, lines, faces, etc.). It undoubtedly increases the learning cost for new users. In addition, a ring is set around the cube so that the four directions of southeast, northwest and southeast can be switched by rotation. For users, it is difficult to achieve precise positioning through mouse rotation.

In addition, existing view navigation methods also provide an operation mode to change the view direction by selecting faces. However, this traditional face selection method usually has certain perceptual difficulties (that is, there is a strong sense of spatial confusion in visual presentation).

For example, see the U.S. invention patent application number US10627974, which discloses a three-dimensional scene orientation indicator system with scene orientation change capability (3D scene orientation indicator system with scene orientation change capability), which can be transformed by selecting a tapered handle scene direction. For another example, see the US invention patent application number US11729211, which discloses a three-dimensional orientation indicator and controller (Three-dimensional orientation indicator and controller), which can select the corresponding view direction by clicking on different areas on the cube. . However, this type of surface selection method has at least the following shortcomings: 1) the form presented on the interface is relatively complex (such as the need for differentiated color display, complex geometric shapes, etc.); 2) this indicator, such as a tapered The visual correlation between the handle's compass (i.e. compass) and the three-dimensional model in the three-dimensional space is relatively weak.

For another example, the existing view navigation method can also select the corresponding view direction by manipulating the coordinate system. For example, see the U.S. patent application No. US16014922, which discloses a method for orienting computer-aided design models. Graphical user interface tool for orienting computer-aided design model. This graphical user interface tool has two operating modes. One is that the user can switch views by manipulating the coordinate system (such as displaying the X, Y, and Z axes); the other is that it can provide a transparent container to encapsulate the reduced three-dimensional model. This further assists the user in selecting the view direction. However, this graphical user interface tool has certain flaws in switching speed and switching accuracy.

In general, existing view navigation methods, especially when faced with 3D models with complex structures and unconventional shapes (for example, 3D models of special-shaped buildings), make it relatively difficult for users to perform spatial perception or view direction selection. larger.

Therefore, there is an urgent need for a view navigation method that is easy to operate and adaptable to complex drawing scenarios.

Contents of the invention

The purpose of the present invention is to provide a view navigation method that partially solves or alleviates the above-mentioned deficiencies in the prior art and can provide a more intuitive and convenient view navigation method for users. In order to solve the above-mentioned technical problems, the present invention specifically adopts the following technical solutions: The first aspect of the present invention is to provide a view navigation method in a three-dimensional scene, which includes the steps:

Display a three-dimensional scene or a three-dimensional model; display a three-dimensional representation of a view navigation device, the three-dimensional representation including a plurality of first operation planes corresponding to different standard view planes of the three-dimensional scene or three-dimensional model, wherein the first operation plane is In order to reflect the user coordinate space, and each of the first operation planes corresponds to the view direction of one of the standard view planes, the first operation plane corresponds to the corresponding standard view plane in space and function; response On any operation plane selected by the user, the view direction corresponding to the operation plane selected by the user is used as the current view direction, and the three-dimensional scene or the three-dimensional model is reoriented to display the three-dimensional scene. The standard view plane of the scene or the three-dimensional model in the current view direction.

In some embodiments, there are 26 first operation planes, and the 26 first operation planes are enclosed to form a 26-hedron, wherein the first operation planes correspond to corresponding ones in space and function. The standard view plane. In some embodiments, the three-dimensional representation further includes: a plurality of second operation planes, the second operation planes are used to reflect the world coordinate space, and each of the second operation planes corresponds to one of the standard view planes. view direction.

In some embodiments, a plurality of the second operating planes surround the 26-hedron. In some embodiments, the method further includes the step of: when the user selects any first type of operation plane in the first operation plane so that the second type of operation plane in the first operation plane is hidden, the step is: The second operation plane is used to assist in positioning the hidden second type of operation plane.

In some embodiments, the number of the second operating planes is eight, and they surround the 26-hedron in the form of a compass. In some embodiments, when the user coordinate space is consistent with the world coordinate space, the eight second operation planes correspond to the eight first operation planes in the 26-hedron in space. .

In some embodiments, the method further includes the steps of: displaying the manipulation controls of the view navigation device; the manipulation controls include: an inversion control; when the user selects the inversion control, the view navigation device is based on a preset at least An inversion scheme is used to invert, and the three-dimensional scene or the three-dimensional model is inverted based on the corresponding inversion scheme. The inversion scheme includes: an inversion direction and an inversion angle.

In some embodiments, the reversal direction optionally includes: up, and/or down, and/or left, and/or right. In some embodiments, the method further includes the step of displaying a property configuration control of the view navigation device. When the user selects the property configuration control, the properties of the view navigation device can be configured, wherein the properties include: each The size of the first operating plane, and/or the size of the second operating plane, and/or the font of the text displayed on the first and second operating planes, and/or the color of each first and second operating plane .

The second aspect of the present invention is that based on the above view navigation method, a view navigation device in a three-dimensional scene is correspondingly provided, including: a display module configured to display a three-dimensional scene or a three-dimensional model; a view navigation display module, Configured for displaying a three-dimensional representation of a view navigation device, the three-dimensional representation including a plurality of first operating planes corresponding to different standard view planes of a three-dimensional scene or a three-dimensional model, wherein the first operating planes are used to reflect a user coordinate space , and each first operation plane corresponds to the view direction of one of the standard view planes, and the first operation plane is in space, Functionally correspond to the corresponding standard view plane; the view navigation operation module is configured to respond to any operation plane selected by the user, and use the view direction corresponding to the operation plane selected by the user as the current view direction, and reorient the three-dimensional scene or the three-dimensional model to display the standard view plane of the three-dimensional scene or the three-dimensional model in the current view direction.

In some embodiments, there are 26 first operation planes, and the 26 first operation planes are enclosed to form a 26-hedron, wherein the first operation planes correspond to corresponding ones in space and function. The standard view plane. In some embodiments, the three-dimensional representation further includes: a plurality of second operation planes, wherein the second operation planes are used to reflect the world coordinate space, and each of the second operation planes corresponds to one of the standard views. The view direction of the face. In some embodiments, a plurality of the second operating planes surround the 26-hedron.

A third aspect of the present invention is that a computer program product for displaying a three-dimensional scene on a display device for use on a computer system is further provided. The computer program product includes a computer usable medium having computer readable program code thereon. , the computer-readable program code includes: program code for processing graphics data to present a three-dimensional model/three-dimensional scene; program code for displaying the three-dimensional model or the three-dimensional scene; program code for presenting a view navigation device The program code of the three-dimensional representation, wherein the three-dimensional representation includes a plurality of first operation planes corresponding to different standard view planes of the three-dimensional scene or three-dimensional model, wherein the first operation plane is used to reflect the user coordinate space, And each first operation plane corresponds to the view direction of one of the standard view planes, and the first operation plane corresponds to the corresponding standard view plane in space and function; used to display the view navigation The program code of the device, and when any operation plane of the view navigation device is selected on the display device, the view direction corresponding to the selected operation plane is used as the current view direction, and the three-dimensional scene or the The three-dimensional model is reoriented to display the three-dimensional scene or the standard view plane of the three-dimensional model in the current view direction.

Beneficial technical effects:

This application all adopts the form of surface operation, in which multiple first operation planes used for operation correspond uniformly to each observation direction (or view direction) of the entity in space and abstract representation (or function), and the operations The surface corresponding to the object (such as the first operation plane) in space is the observation direction that the user wishes to switch (in other words, the "face-to-face" operation mode of the present application realizes the unification of visual correspondence and functional correspondence). On the one hand, this "face-to-face" operation can omit the step of computer judgment and identification. From both the computer operation perspective and the user operation perspective, its efficiency and convenience have been improved. And this "face-to-face" operation mode is more in line with the user's abstract way of thinking, and is more intuitive and easy to understand in terms of operation mode and visual presentation (in other words, the "face-to-face" operation mode of this application can fit well with the user's Abstract thinking habits to assist users in spatial imagination).

Moreover, unlike the "point, line, and plane mixed operation" method used in the prior art, this application fully adopts the "surface operation" design, and preferably uses a 26-hedron to present the corresponding first operation plane. Compared with the cube in the prior art (an operating area with more vertices and ridges), the presentation form of the 26-hedron is more concise and intuitive (that is, what you see is what you get). From the perspective of user learning and use, faced with this "mixed operation of points, lines and surfaces", one needs to learn which areas in the cube can be operated or selected, that is, one needs to learn points, lines, and surfaces respectively. and other operational functions (such as whether the viewing angle can be switched and the corresponding relationship with each viewing angle). In this application, the form of "surface operation" is fully adopted, which also achieves another technical effect - reducing the visual difference of each operating area (the operating areas in the prior art include: points, lines, and surfaces, this application The operating areas in the screen are basically presented through surfaces, such as 26 first operating planes, etc.), which further enhances the unity between visual effects and actual functions. Whether in terms of visual presentation or usage habits, users can intuitively understand the equal status of each face in operating functions. Therefore, for users, the "face-to-face" operating mode is more convenient for learning and use. Intuitive and easy to understand.

In addition, on the one hand, the polyhedron design (or 26-hedron design) proposed in this application can well realize the multi-angle view navigation function; on the other hand, in terms of visual presentation effect, the polyhedron is also equivalent to providing a "zooming out" function. Model", for users, when the entity presented by CAD is relatively complex (for example, when the CAD graphics involves the overall architectural model), it may be difficult for the user to quickly imagine the specific observation surface only from the entity observation. And when the user combines it with the polyhedron Through selection and imagination, when abstracting thoughts, you can more intuitively imagine the perspective graphics of the entity (because the surfaces in this "reduced model" correspond to the observation surfaces of the entity uniformly in space and abstract representation, you can more intuitively Visually display the viewing angle direction). At the same time, the 26-hedron model design can better assist users in spatial imagination without causing spatial confusion.

Moreover, in the actual CAD operation process, in order to better present entities, the display area is usually left as much as possible for entity display, and accordingly the display area left for the view navigation function is smaller. Therefore, one of the advantages of this application is that when the navigation function display size is small, the selection of faces is more accurate than the selection of points and lines.

In the actual use of CAD, when drawing or reviewing entity graphics, the overall view is a relatively basic application requirement, and the frequency of use is extremely high. The simplicity and accuracy of the "face-to-face" operation mode selected in this application can well adapt to the user needs of this overall face-to-face view.

Furthermore, in this application, the world coordinate space is preferably displayed in the form of a compass. Each second operating plane in the compass corresponds to a specific view direction. When the user needs to perform direction positioning, in addition to being able to operate through the 26-hedron, It can also be positioned through the eight second operating planes in the compass to quickly and accurately locate a specific observation direction. Moreover, when the user coordinate space and the world coordinate space are consistent, the settings of the eight second operation planes in the compass correspond exactly to the eight first operation planes in the 26-hedron in three-dimensional space (that is, from the perspective of visual effects) one correspondence). It can be understood that the relationship between the second operation plane and the first operation plane is not fixed. For example, when the user coordinate space and the world coordinate space are inconsistent, there is no one-to-one relationship between the first and second operation planes. Corresponding relationship. Among them, the positional relationship between the first and second operating planes can be flexibly changed based on actual usage conditions to better assist the user in positioning operations.

CAD is a highly professional drawing software with many and complex operating functions. For users, the learning cost (for example, learning time) required to use CAD proficiently is relatively high. On the other hand, CAD targets a relatively wide range of user groups, and different user groups have different needs. For example, for some users (such as construction engineers, water supply and drainage engineers, etc.), they need to master most of the functions of CAD in order to draw corresponding engineering drawings; while for other users, their more usage needs are mainly It involves the review of engineering graphics, so the learning requirements for using CAD are relatively low. The "face-to-face" operation mode in this application makes it easy for users to learn and use it. Even beginners or users who are not proficient in using CAD can quickly understand and master the functions. Therefore, the "face-to-face" operation method in this application is not only easy to learn and quick to use, but also can meet various needs in the actual use of CAD (accuracy, flexibility, etc.), so that it can be used very well. Meet the needs of different types of users.

On the one hand, the compass design in this application adds optional view switching directions (specifically, the ring design of existing CAD drawing equipment can only click in 4 directions, while the compass design provides view switching in 8 directions). And the 8 directions in the compass (corresponding to 8 second operating planes) can cooperate with the 8 directions in the 26-hedron (corresponding to 8 second operating planes) to assist in positioning with the optimized 26-hedron design. Moreover, this corresponding design of the compass further improves the flexibility and accuracy of positioning operations. Through the eight second operating planes, the view can be flexibly rotated to the corresponding viewing angle, and the rotation angle of the viewing angle can be accurately controlled, so that Accurately locate a specific perspective (for example, left-view perspective, right-view perspective, etc.). At the same time, the compass further enriches the spatial pointing function of the view navigation device, making it easier for users to understand and get started.

The 26-sided cube of the present invention corresponds to the user coordinate space (UCS), while the compass corresponds to the world coordinate space (WCS). Usually the display space (or drawing space) of CAD software when drawing is the user coordinate space. The user edits the drawing based on the current user coordinate space. The spatial positioning is relative, the operation is intuitive and accurate, and the user coordinate space changes frequently. Therefore, in terms of design, a 26-sided cube is used to represent the user coordinate space, which has significant graphic effects and direct spatial expression. The graphic elements of CAD are based on world coordinate space by default, which is absolute, immutable, and unique. Therefore, in the design, a compass diagram is used to represent the unique world coordinate space to facilitate users' spatial reference. The user coordinate space is equivalent to the world coordinate space. With the compass icon, the user can intuitively observe the space of the current user coordinate space. relative shape.

Description of drawings

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Throughout the drawings, similar elements or portions are generally identified by similar reference numerals. In the drawings, elements or parts are not necessarily drawn to actual scale. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 is a schematic three-dimensional representation of a view navigation device according to an exemplary embodiment of the present invention;

Figure 2 is a schematic diagram of a three-dimensional representation when the top view (or top view) is the current view in the view navigation device according to an exemplary embodiment of the present invention;

Figure 3 is a schematic diagram reflecting a first operating plane being selected in the three-dimensional representation of the view navigation device shown in Figure 1;

Figure 4 is a schematic diagram of the corresponding perspective as the current perspective when the first operating plane selected in the view navigation device shown in Figure 3 is selected;

Figure 5 is a schematic diagram of the second operating plane representing the northwest perspective being selected in the view navigation device shown in Figure 2;

Figure 6 is a schematic diagram of the northwest perspective corresponding to the second operating plane selected in the view navigation device shown in Figure 5 as the current perspective. At this time, two faces of the three-dimensional model in the three-dimensional scene can be observed at the same time, and all second operations The plane switches from working state to auxiliary state;

Figure 7 is a schematic diagram reflecting that the inversion control of the view navigation device shown in Figure 1 is selected;

Figure 8 is a schematic diagram reflecting the inversion of the view navigation device shown in Figure 7. Correspondingly, the three-dimensional model in the three-dimensional scene will also be inverted to provide a new observation perspective, thereby observing multiple faces of the three-dimensional model at the same time;

Figure 9 is an exemplary three-dimensional representation schematic diagram reflecting the reconfiguration of attributes of the view navigation device shown in Figure 1;

Figure 10 is a schematic diagram reflecting that the 26-hedron is configured in an inclined state in the three-dimensional representation of the view navigation device shown in Figure 1;

Figure 11 is a front view of the three-dimensional table model when the first operating plane representing the front view is selected (ie, the front view is used as the current view) in the view navigation device reflecting an exemplary embodiment of the present invention. At this time, the second The operating plane switches to the auxiliary state;

Figure 12 is a right view of the three-dimensional table model when the first operating plane representing the right perspective is hidden in Figure 10 and the right perspective is used as the current perspective.

Figure 13 is an isonometric view of the three-dimensional model of the table when the first operating plane reflecting the first isonometric perspective shown in Figure 12 is selected (that is, the first isonometric perspective is used as the current perspective);

14 is a top view of a three-dimensional model of a component when the first operating plane of the top view (or top view) is selected (ie, the top view is used as the current perspective), reflecting the view navigation device according to an exemplary embodiment of the present invention. ;

Figure 15 shows a bottom view of a three-dimensional model of a component when the first operating plane of the downward perspective (or upward perspective) shown in the view navigation device according to an exemplary embodiment of the present invention is selected (ie, the upward perspective is used as the current perspective). picture;

FIG. 16 is a right view of a three-dimensional model of a component when the first operation plane of the right-view perspective shown in the view navigation device according to an exemplary embodiment of the present invention is selected (that is, the right-view perspective is used as the current perspective). , the second operating plane switches to the auxiliary state;

Figure 17 is a right rear side view of a component three-dimensional model when the first operating plane reflecting the right rear side perspective shown in Figure 16 is selected and the current perspective is switched to the right rear side perspective;

Figure 18 is a rear view of a three-dimensional model of a component when the first operating plane reflecting the rear perspective shown in Figure 17 is selected (ie, the rear perspective is used as the current perspective);

Figure 19 is an upper right view of a three-dimensional model of a component when the first operating plane assists in positioning the upper right perspective shown in Figure 18 which is hidden in Figure 18 by the second operating plane in the auxiliary state, and the upper right perspective is used as the current perspective, And at this time, the second operating plane switches from the auxiliary state to the working state;

20 is a second view showing a northeastern isometric perspective shown in the view navigation device according to an exemplary embodiment of the present invention. When the operating plane is selected (that is, the northeast isometric view is used as the current perspective), the northeast isometric view of the building 3D model;

Figure 21 is a front view of the three-dimensional architectural model when the first operating plane of the front view represented in the view navigation device is selected (ie, the front view is used as the current view), reflecting an exemplary embodiment of the present invention;

Figure 22 shows the southwest isometric view of the building three-dimensional model when the second operating plane of the southwest isometric perspective shown in the view navigation device according to an exemplary embodiment of the present invention is selected (that is, the southwest isometric perspective is used as the current perspective). measurement view;

FIG. 23 shows that when the second operating plane of the southwest isometric perspective shown in the view navigation device according to an exemplary embodiment of the present invention is selected, that is, when the southwest isometric perspective is used as the current perspective, the southwest isometric views of multiple three-dimensional models are shown in FIG. measurement view;

Figure 24 reflects that in the three-dimensional representation in Figure 23, the first operating plane representing the front view (or front view) is selected, or the second operating plane representing the south view is selected (i.e., the front view or the south view is used as the current view). ), the views (or front view, main view or front view) of multiple 3D models in the drawing interface;

Figure 25 reflects that in the three-dimensional representation in Figure 23, when the first operation plane representing the rear view perspective is selected, or the second operation plane representing the north perspective is selected (that is, the rear view perspective or the north perspective is used as the current perspective), in the drawing interface Views (or rear views) of multiple 3D models;

Figure 26 reflects that in the three-dimensional representation in Figure 23, when the first operation plane representing the left-view perspective is selected, or the second operation plane representing the western perspective is selected (that is, the left-view perspective or the western perspective is used as the current perspective), in the drawing interface Views (or left views) of multiple 3D models;

Figure 27 reflects that in the three-dimensional representation in Figure 23, when the first operating plane representing the right perspective is selected, or the second operating plane representing the eastern perspective is selected (that is, the right perspective or the western perspective is used as the current perspective), in the drawing interface Views (or right views) of multiple 3D models;

Figure 28 is a top view of multiple three-dimensional models in the drawing interface when the first operating plane representing the top view (or top view) is selected in the three-dimensional representation in Figure 23 (that is, the top view is used as the current perspective);

Figure 29 is a bottom view of multiple three-dimensional models in the drawing interface when the first operating plane representing the downward perspective (or upward perspective) is selected in the three-dimensional representation in Figure 23 (that is, the upward perspective is used as the current perspective);

Figure 30 reflects that when the first operation plane representing the upper front view angle (that is, the first operation plane between the first operation planes representing the upper view angle and the front view angle) is selected in the three-dimensional representation in Figure 23, many in the drawing interface An upper front view of a three-dimensional model;

Figure 31 reflects that when the first operating plane representing the lower front perspective in the three-dimensional representation in Figure 23 (that is, the first operating plane between the two first operating planes representing the upward perspective and the front perspective) is selected, in the drawing interface Inferoanterior views of multiple 3D models;

Figure 32 reflects that the first operating plane representing the left front perspective in the three-dimensional representation in Figure 23 (that is, the first operating plane between the two first operating planes representing the left perspective and the front perspective) is selected, or represents the southwest direction. When the second operating plane of the perspective is selected (that is, the left front perspective or the southwest perspective is the current perspective), the views of multiple three-dimensional models in the drawing interface;

Figure 33 reflects that the first operating plane representing the right front perspective (ie, the first operating plane between the two first operating planes representing the right perspective and the front perspective) in the three-dimensional representation in Figure 23 is selected, or represents the southeast direction. When the second operating plane of the perspective is selected (that is, the right front perspective or the southeast perspective is the current perspective), the views of multiple three-dimensional models in the drawing interface;

Figure 34 reflects that when the first operating plane representing the upper and rear perspective in the three-dimensional representation in Figure 23 (that is, the first operating plane between the two first operating planes representing the top and rear perspective) is selected, in the drawing interface Views of multiple 3D models;

Figure 35 reflects that when the first operating plane representing the lower rear perspective in the three-dimensional representation in Figure 23 (that is, the first operating plane between the two first operating planes representing the upward perspective and the rear perspective) is selected, in the drawing interface Views of multiple 3D models;

Figure 36 reflects that the first operating plane representing the left rear view angle in the three-dimensional representation in Figure 23 (that is, the first operating plane between the two first operating planes representing the left view angle and the rear view angle) is selected, or represents the northwest The second operating level of the square perspective Views of multiple three-dimensional models in the drawing interface when the plane is selected (that is, the left rear perspective or the northwest perspective is the current perspective);

Figure 37 reflects the drawing interface when the first operating plane representing the right rear perspective (ie, the first operating plane between the two first operating planes representing the right perspective and the rear perspective) is selected in the three-dimensional representation in Figure 23 Views of multiple 3D models;

Figure 38 reflects that the first operating plane representing the upper left perspective in the three-dimensional representation in Figure 23 (that is, the first operating plane between the two first operating planes representing the left perspective and the top perspective) is selected, or represents the northeast perspective. When the second operating plane is selected (that is, the upper left perspective or the northeast perspective is the current perspective), the views of multiple three-dimensional models in the drawing interface;

Figure 39 reflects that when the first operation plane representing the lower left perspective in the three-dimensional representation in Figure 23 (that is, the first operation plane between the two first operation planes representing the left perspective and the bottom perspective) is selected, in the drawing interface Lower left side view of multiple 3D models;

Figure 40 reflects that when the first operation plane representing the upper right perspective in the three-dimensional representation in Figure 23 (that is, the first operation plane between the two first operation planes representing the top view and the right perspective) is selected, many in the drawing interface The upper right side view of a three-dimensional model;

Figure 41 reflects that when the first operating plane representing the lower right perspective in the three-dimensional representation in Figure 23 (that is, the first operating plane between the two first operating planes representing the upward perspective and the right perspective) is selected, in the drawing interface Lower right side view of multiple 3D models;

Figure 42 reflects that the first operating plane representing the southwest isometric perspective (ie, the first operating plane or the triangular plane between the two first operating planes representing the lower left perspective and the lower front perspective) in the three-dimensional representation in Figure 23 is When selected, a view of the southwest isometric underside of multiple 3D models in the drawing interface;

Figure 43 reflects that the first operating plane representing the southeast isometric upper perspective (i.e., the first operating plane or the triangular plane between the two first operating planes representing the upper front perspective and the upper right perspective) in the three-dimensional representation in Figure 23 is When selected, the southeast isometric upper side view of multiple 3D models in the drawing interface;

Figure 44 is a reflection of the first operating plane representing the southeast isometric lower perspective in the three-dimensional representation in Figure 23 (ie, the first operating plane or triangular plane between the two first operating planes representing the lower front perspective and the lower right perspective) View of the southeastern isometric underside of multiple 3D models in the drawing interface when selected;

Figure 45 reflects that the first operating plane representing the northwest isometric upper perspective (i.e., the first operating plane or the triangular plane between the two first operating planes representing the upper rear perspective and the upper left perspective) in the three-dimensional representation in Figure 23 is When selected, views of multiple 3D models in the drawing interface;

Figure 46 reflects that the first operating plane representing the northwest isometric lower perspective (i.e., the first operating plane or the triangular plane between the two first operating planes representing the lower rear perspective and the lower left perspective) in the three-dimensional representation in Figure 23 is When selected, views of multiple 3D models in the drawing interface;

Figure 47 reflects that the first operating plane representing the northeast isometric upper perspective (ie, the first operating plane or the triangular plane between the two first operating planes representing the upper rear perspective and the upper right perspective) in the three-dimensional representation in Figure 23 is When selected, views of multiple 3D models in the drawing interface;

Figure 48 is a reflection of the first operating plane representing the northeast isometric lower perspective in the three-dimensional representation in Figure 23 (i.e., the first operating plane or triangular plane between the two first operating planes representing the lower rear perspective and the lower right perspective) Views of multiple 3D models in the drawing interface when selected;

Figure 49 is a three-dimensional representation of a view navigation device reflecting yet another exemplary embodiment of the present invention, in which the 26-hedron is rotated into a tilted state, and the second operating plane of the represented southwest isometric perspective is selected (i.e., the southwest isometric perspective Southwest isometric view of multiple 3D models when used as the current perspective);

Figure 50 is a schematic flowchart of a method in an exemplary embodiment of the present invention;

Figure 51 is a schematic structural diagram of a device in an exemplary embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the The accompanying drawings clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Herein, suffixes such as "module", "component" or "unit" used to represent elements are used only to facilitate the description of the present invention and have no specific meaning in themselves. Therefore, "module", "component" or "unit" may be used interchangeably. In this article, the terms "upper", "lower", "inside", "outside", "front", "back", "one end", "the other end", etc. indicate the orientation or positional relationship based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. limit. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In this article, unless otherwise expressly stipulated and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection or a detachable connection, or Integrated connection; it can be mechanical connection, direct connection, indirect connection through an intermediary, or internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As used herein, "and/or" includes any and all combinations of one or more of the associated listed items. "Plural" in this article means two or more, that is, it includes two, three, four, five, etc.

"Entity" in this article refers to the graphic data on the CAD file, which is displayed on the CAD drawing interface. Entities have properties, which are data values that control specific visual characteristics of the entity or element, such as visibility, color, and line style. In different embodiments, entities may also be referred to as "pixels" or "graphic primitives".

"Object" in this article refers to the information on the CAD file that will not be displayed on the CAD drawing interface, such as layers, text styles, annotation styles, etc. In this article, "style" refers to a named collection of attributes used to classify and define specific geometric and textual elements (such as line styles or text styles).

"Element" in this article: refers to all possible information on the CAD file, including "entities" and "objects", and can also be block, group, and unit definitions based on "entities" and/or "objects". "File" in this article: refers to various types of files that can be run in the CAD system and used to draw, edit, modify, store, and view CAD drawings. Common CAD file formats include, but are not limited to, DWG, DXF, DWT, DWF, DWL, DWS, DWX, MNU, MNC, MNL, MNS, CUI, CUIX, SHX, PAT, LIN, CTB, STB, PLT, PC3 wait.

"Standard view plane" or "standard view" in this article: refers to the standard drawing planes used in the industry during the drawing process using CAD drawing tools (including: plan, side elevation, front elevation, back elevation) , southwest isometric plane, etc.), and its normal vector serves as the visual forward direction of the screen, that is, the view direction or perspective. For example, the normal vector corresponding to the front elevation is called the front view direction (or front view angle, or front view direction), the normal vector corresponding to the right elevation is called the right view direction (or right view angle), and the left elevation direction is called the right view direction (or right view angle). The normal vector corresponding to the face is called the left view direction (left view angle), the normal vector corresponding to the back elevation is called the back view direction (or rear view angle, or rear view direction), and the normal vector corresponding to the right rear elevation is called the back view direction (or rear view angle, or rear view direction). The vector is called the right rear direction (or right rear side view), the normal vector corresponding to the southwest isometric plane is called the southwest isometric direction (or southwest isometric view), etc.

"Operation plane" in this article: refers to the intuitive, user-friendly plane that corresponds to each standard view direction when the view navigation device is represented in three dimensions. For example, each plane of the 26-hedron (also called the first operating plane), and the eight planes of the compass design surrounding the 26-hedron (also called the second operating plane), where the second operating plane It has two states, one is the working state: that is, each second operating plane corresponds to a standard view plane of the 3D scene or 3D model, for example, the southwest isometric view; one is the auxiliary state, that is, each second operating plane The operating plane is used to assist in locating the eight first operating planes that are hidden under the current viewing angle (that is, the second type of operating plane; of course, the hidden first operating planes are different under different viewing angles). For example, the current viewing angle is When looking at the front view (or front view), the first operating plane corresponding to the left view, right view, upward view (i.e., top view), and down view (i.e., upward view) is hidden, and at this time, the first operating plane is hidden. The second operation plane is in the auxiliary state and is positioned at the corresponding first operation plane which is hidden. Only when the first type of first operation plane is selected, the state of the second type of operation plane is switched to the auxiliary state, and accordingly, the second type of first operation plane is hidden.

Embodiment 1

With the gradual development of professional drawing functions of CAD systems, the three-dimensional model designs completed by users with the help of CAD systems are becoming more and more complex. When faced with these complex 3D models (for example, 3D models of special-shaped buildings, 3D models of complex urban environments), it becomes more difficult for users to perform spatial perception (or spatial perception) and view selection. big. In order to enable users to select or switch view directions more intuitively and quickly, and at the same time reduce the learning cost of new users, as shown in Figure 50, the present invention provides a view navigation method in a three-dimensional scene, which includes the steps :

S02, display the 3D scene or 3D model;

S04. Display a three-dimensional representation of the view navigation device. The three-dimensional representation includes a plurality of first operation planes corresponding to different standard view planes of the three-dimensional scene or three-dimensional model, wherein the first operation plane is used to reflect the user coordinate space, and each first operation plane is used to reflect the user coordinate space. The operation plane corresponds to the view direction of a standard view plane, and the first operation plane corresponds to the corresponding standard view plane in both space and function;

S06, in response to any operation plane selected by the user, use the view direction corresponding to the operation plane selected by the user as the current view direction, and reorient the three-dimensional scene or three-dimensional model to display the three-dimensional scene or three-dimensional model in The standard view plane in the current view direction.

In some embodiments, the user can directly click or select the operation plane (for example, the user can directly click on the operation plane through a mouse, or select the operation plane through operation keys such as a virtual keyboard or a physical keyboard, or by clicking on the touch screen). Select the operating plane in the corresponding area) to select the corresponding operating plane.

In some embodiments, there are 26 first operating planes, and the 26 first operating planes enclose a 26-hedron. As shown in Figures 1-10, 26 first operating planes enclose a 26-hedron as shown in Figures 1-10.

In some embodiments, the three-dimensional representation further includes: a plurality of second operation planes, wherein the second operation planes are used to reflect the world coordinate space, and each of the second operation planes corresponds to one of the standard views. The view direction of the face.

In some embodiments, a plurality of the second operating planes surround the 26-hedron.

In some embodiments, each first operating plane corresponds to each observation direction (or view direction) of the entity in a one-to-one spatial and abstract representation (that is, a functional representation relationship), and all in this embodiment The spatial visual representation of the first operating plane corresponds to its abstract representation. Specifically, each first operation plane of the 26-hedron corresponds to each observation direction of the entity one-to-one in three-dimensional space, and in terms of function settings, selecting the first operation plane means selecting the corresponding observation direction. For example, in some embodiments, the first operating plane located between the two first operating planes corresponding to "upper" and "left" is the "upper left operating surface", and the normal vector of the "upper left operating surface" is the same as the "upper left operating surface". "Observation direction" is parallel or approximately parallel, so that visually the "upper left operation surface" and the "upper left view surface" (corresponding to the "upper left observation direction") are the same or approximately the same; and, the "upper left operation surface" is in the abstract representation The actual corresponding view plane is also the "upper left view plane". When the user selects the "upper left operation plane", the "upper left view plane" of the entity will be presented to the user (ie: what you see is what you get). In other words, the "26-hedron" design in this embodiment provides a "face-to-face" operation mode. This "face-to-face" operation mode realizes the unification of visual correspondence and functional correspondence, and is more in line with the user's abstract way of thinking. and operating habits.

When the entities to be observed are three-dimensional figures with irregular shapes or complex line relationships (such as special-shaped buildings with non-linear design), selecting the view direction through the 26-hedron is more helpful for users to think abstractly. As shown in Figures 21 and 22, the entity shown in Figures 21 and 22 is a house, and its external structure is relatively complex. For users, there may be some hesitation or doubt when choosing which side to observe, and the image of the 26-hedron can help users imagine the perspectives corresponding to each side of the house (or, in other words, especially for those with different shapes). For three-dimensional graphics with complex rules or line relationships, the spatial correspondence between the 26-hedron and the three-dimensional graphics is stronger) to select the faces that need to be presented. In addition, the 26-hedron is relatively simple in visual effect, which will not cause space confusion and reduce the user experience.

It is worth noting that, unlike the existing view navigation methods, the present invention provides more operable planes in a more concise presentation (the number of operable points/faces in the view navigation methods in the prior art is relatively small). Limited and difficult to collect again form or overlap other operating areas).

In some embodiments, the view navigation method in the three-dimensional scene further includes the step of: when the user selects any first type of operation plane in the first operation plane, so that the second operation plane in the first operation plane When the class operation plane is hidden, the second operation plane is used to assist in positioning the hidden second class operation plane, that is, the second operation plane is switched to an auxiliary state.

For example, in some embodiments, as shown in Figure 6, since the 26-hedron can only display part of the faces such as the left, back, left back, etc. (corresponding to the first type of operating plane), at this time, it is impossible to display the upper and lower faces at the same time. etc. (corresponding to the second type of operating plane), that is, only part of the face of the 26-hedron is visible when it is relatively stationary. At this time, operating the 26-hedron alone can only directly select some of the faces (9 faces as shown in Figure 6). If you want to select other faces on the 26-hedron, you need to rotate the 26-hedron. In this embodiment, when the second type of operation plane is hidden, the second operation plane can assist in positioning the hidden second type of operation plane as shown in FIG. 6 . Moreover, as shown in Figures 5 and 6, the design of the 26-hedron and the design of the compass can cooperate with each other. The 8 faces of the compass and the eight faces of the hidden faces in the 26-hedron can correspond one-to-one in space. . In other words, the design of the compass can help users quickly switch to more hidden viewing angle options. Therefore, by selecting any second operating plane, the required viewing angle direction can also be quickly and accurately positioned (as shown in Figure 6, there are 9+8=17 viewing angle directions that can be directly switched).

For example, as shown in FIGS. 12 and 19 , in some embodiments, the second operation plane and the hidden part of the second type of operation plane correspond one-to-one in space.

In some embodiments, the number of the second operating planes is eight, and they are surrounded by the 26-hedron in the form of a compass, so that the 8 second operating planes are spatially connected to the 8 faces of the 26-hedron. One-to-one correspondence, as shown in Figures 1-9.

Compared with the annular design of the world coordinate space in the prior art, the combined design of eight second operation planes in this embodiment (preferably presented through a compass) visually divides the functional areas. From the user's perspective, it can be more intuitively understood that different second operating planes (that is, the eight areas of the compass) represent different viewing directions. This clear division of space and functions allows users to more Directly selecting the required view direction is more in line with the thinking habits of ordinary users.

And this compass form design also improves the efficiency of view switching to a certain extent. For example, when the user needs to switch to the direction represented by "South", in the traditional ring design, they need to wait for the system to identify whether the arrow icon is suspended in the area representing "South". When the user determines that the arrow icon is suspended over "South" , then select "South". In this embodiment, the clear area division omits the judgment step, and the user can select the corresponding area more quickly.

In some embodiments, the standard view plane includes: standard six views, and isometric views, such as southwest isometric view, southeast isometric view, northeast isometric view, and so on.

The view navigation method in this embodiment is very convenient to operate in the application process mainly involving navigation of standard view planes. Through the combination of the 26-hedron function setting and the auxiliary function of the compass, users can accurately and quickly switch multiple standard view planes at the same time, and the operation is very convenient. Especially when switching to perspective directions such as southwest isometric view and southeast isometric view, the "surface operation" can accurately and quickly select the operating area (i.e., the corresponding operating plane) and switch views. For example, when you need to review architectural graphics, you can quickly switch to the southwest isometric view, southeast isometric view, etc. of the building through the collaborative use of the 26-hedron and the compass.

In some embodiments, the view displayed by the entity in the CAD in the initial operating state is a southwest isometric view.

In some embodiments, the method further includes the steps of: displaying the manipulation controls of the view navigation device; the manipulation controls include: an inversion control; when the user selects the inversion control, inverting the view navigation device and reverting the three-dimensional scene or three-dimensional model to Perform inversion.

Specifically, in some embodiments, when the user selects the inversion control, the view navigation device is inverted based on at least one preset inversion scheme, and the three-dimensional scene or three-dimensional model is inverted based on the corresponding inversion scheme. Rotation and reversal solutions include: reversal direction and reversal angle. For example, in some embodiments, as shown in Figures 7 and 8, when the icon corresponding to the inversion control is selected and clicked (the rightmost icon at the top of Figure 7), the three-dimensional model in Figure 7 is inverted from top to bottom. Go to next.

Preferably, in some embodiments, the reversal direction optionally includes one or more directions such as up, down, left, and right.

For example, in some embodiments, when the icon corresponding to the inversion control is selected and clicked, the three-dimensional model may be rotated in the horizontal direction. For example, when the current view is the front view, click the invert control to reverse the front view to the back view. Or, in other embodiments, the angle of reversal can be set to other values. For example, clicking the reversal control can reverse the view from the front view to the right view.

In this embodiment, each standard view plane of the entity (such as front, back, etc.) can be quickly and accurately switched through the 26-hedron (for example, when "Front" is selected, you can directly switch to the front view of the entity). The compass can further assist in switching perspectives from different directions. On the one hand, you can quickly switch to specific perspective directions such as "south" and "southwest" through the directions in the compass; on the other hand, the compass can also adjust some hidden perspective options. Assisted positioning. It can basically adapt to most CAD application scenarios through two switching modes such as 26-hedron and compass. The inversion method in this embodiment further improves the flexibility of view switching from another level (or in other words, provides more options for the convenience of view switching). It can be understood that the switching mode of the selection surface of the 26-hedron is to switch to a fixed standard viewing surface. For an entity, each of its standard viewing surfaces is fixed, and inversion can orient the entity at any position. , fixed angle reversal. Therefore, with the cooperation of the three functions of inversion, 26-hedron switching, and compass switching, users can be provided with more operating options for switching in the "face-to-face" operating mode. And while providing more operation options (that is, improving flexibility), it also ensures the convenience and accuracy of operation. In this embodiment, the superposition of the inversion mode, the 26-hedron switching mode and the compass switching mode (ie, the navigation mode) produces a synergistic effect, further increasing the flexibility of the method.

The synergy of the three navigation methods in this embodiment can be well adapted to application scenarios that require fast and large fixed-angle switching, for example, when a user reviews a completed graphic.

In this embodiment, the inversion control can be used to manipulate a three-dimensional scene or three-dimensional model in any spatial state. It can be understood that the inversion in this embodiment is not to switch the standard view (or in other words, not to switch the conventional six views of the three-dimensional scene or three-dimensional model), but to switch the three-dimensional scene or the three-dimensional scene at any position. The 3D model performs fast viewing angle switching with a fixed switching amplitude (direction, angle).

The reversal function in this embodiment can be adapted to scenes where rapid and large-scale viewing angle switching is performed. For example, when users are designing the interior of a kitchen, after drawing cabinets and cabinet handles and other structures, they need to view the space between the cabinet and other objects in multiple directions to evaluate whether the design plan is feasible. Or, when the user has finished drawing structures such as tables and chairs, he or she needs to view the arrangement relationship of the tables and chairs and the spatial intervals between them and other objects in multiple directions to determine whether the spatial relationship is reasonable.

For another example, when a user needs to review a completed building model, it is usually necessary to quickly and significantly switch the perspective of the building model to quickly review the building model. At this time, through the combined use of three different functions such as the inversion function, 26-hedron switching, and compass switching, a rapid review of the architectural model can be quickly achieved.

It is worth noting that the “face-to-face” operation mode can provide users with intuitive and accurate visual switching instructions under a relatively single attribute configuration.

Of course, the ViewCube in the present invention can also configure different attributes according to the user's needs.

In some embodiments, the view navigation method in a three-dimensional scene further includes the step of displaying an attribute configuration control of the view navigation device. When the user selects the attribute configuration control, the attributes of the view navigation device can be modified. Configuration, wherein the attributes include: the size of each of the first operation planes, and/or the size of the second operation plane, and/or the font of the text displayed on the first and second operation planes, and/or Or the color of each first and second operating plane. For example, configure the font style on the 26-hedron or compass, and the color of each operating plane.

For example, in some embodiments, the dimensions of the first and second operating planes include: length, width, side length and other attributes of the plane, such as prism width and compass width.

Referring to Figures 1-4, in some embodiments of the present invention, the three-dimensional representation of the view navigation device includes a 26-hedron, which is composed of a total of 24 vertices, that is, the faces, edges, and corners of the cube are converted into view operation planes , that is, 26 operating planes: the six faces of the cube (appearing as squares in the three-dimensional representation), the 12 faces corresponding to the 12 edges of the original cube (Appeared as a rectangle in the three-dimensional representation), and the 8 faces corresponding to the 8 vertices of the original cube (appeared as triangular faces in the three-dimensional representation). When the corresponding view operation plane is selected, the view navigation device (i.e. ViewCube) rotates to the normal vector of the operation plane as the screen visual front direction, and the 3D scene or 3D model is rotated to the standard view in the view direction corresponding to the operation plane.

For example, when the first operating plane representing the top-down perspective in Figure 1 is selected, the three-dimensional representation of the view navigation device is rotated so that the top-down perspective is used as the current view direction, see Figure 2; accordingly, the three-dimensional model of the component is reoriented, To display the standard view plane in the current view direction - top view, see Figure 13.

Referring to Figures 1-6, the view navigation device of the present invention also includes a second view operation plane using a compass design, which provides operations in eight view directions: east, south, west, north, northeast, southwest, northwest, and southeast. flat.

Referring to Figures 7-8, the view navigation device of the present invention can also perform a reversal operation by reversing the control.

Referring to Figure 10, the 26-hedron in the view navigation device of the present invention can also be placed at an angle. Since the tilted placement of the 26-sided cube corresponds to the user coordinate space (UCS), the user coordinate space is defined by the user for drawing convenience. So its rotation is up to the user. The compass corresponds to the world coordinate space, which is fixed and unique. Its rotation depends on the current viewing direction. The simultaneous existence of both allows the user to intuitively observe the spatial relative shape of the current user coordinate space relative to the world coordinate space.

In some embodiments, when the user coordinate space and the world coordinate space are inconsistent, there is no spatial correspondence between any first operation plane in the 26-hedron and the eight second operation planes corresponding to the compass, as shown in Figure 10 Show. When the user coordinate space and the world coordinate space are consistent, there are eight first operation planes in the 26-hedron that correspond to the eight second operation planes corresponding to the compass in space (that is, there is a correspondence relationship).

In this embodiment, the relationship between the 26-hedron and the compass is not fixed and can be flexibly adjusted based on the user's real-time needs.

On the other hand, usually, the placement of the 26-hedron corresponds to the design of the compass, as shown in Figure 23, in which the 26-hedron has eight viewing angles/directions: front, back, left, right, front left, front right, rear left, and rear right. They respectively correspond to the eight perspectives/directions of south, north, west, east, southwest, southeast, northwest and northeast on the compass. For example, when the first operation plane representing the front perspective is selected and the second operation plane representing the south perspective is selected, the view of the 3D scene or 3D model is the same, see Figure 24.

Since the 26-hedron corresponds to the UCS and the compass corresponds to the WCS, when the direction of the 26-hedron is adjusted, the corresponding relationship between the operating plane on it and the operating plane on the compass is automatically adjusted. For example, when the 26-hedron is reset, its first operating plane representing the rear view corresponds to the second operating plane representing the south perspective in the compass (or other first operating planes representing non-forward viewing angles correspond to the center plane of the compass). When representing the second operating plane of the southern perspective), correspondingly, other operating planes of the hexahedron and the eight directions of the compass are also adaptively adjusted.

Of course, in other embodiments, when the UCS and WCS are inconsistent, the tilt of the 26-hedron produces relative tilt or rotation, and the above eight directions do not correspond to the eight directions of the compass. See Figure 10 or Figure 49. This will The way in which the 26-hedron is tilted or rotated is compared to the way in which any first operating plane in the 26-hedron corresponds to any second operating plane, because any first operating plane in the 26-hedron does not correspond to any The second operating plane, therefore, not only reflects the spatial transformation of UCS relative to WCS, but also provides more observation angles/directions, which is suitable for application scenarios that require observation from more angles.

Referring to Figures 9 and 10, the view navigation device of the present invention can configure display styles, including prism width, compass width, font (such as font style, color, size, etc.) and plane area color, which can be modified by setting system variables.

Application scenario 1: ViewCube, the 26 operating planes of the 26-hedron, can assist in drawing design. For example, the drawing size of an object can be switched between views in various directions, the object can be accurately designed or marked, and the design effect from each perspective can be observed, see Figures 11-13.

Referring to Figure 11, when the first operation surface corresponding to the front view angle in the three-dimensional representation is selected, the second type of first operation plane (for example, upper, lower, left, right, upper left side, upper right side, lower left side, lower right side The first operation of the eight view directions on the side plane) is hidden, and at the same time, the second operation surface is switched to the auxiliary state, and is respectively positioned at the operation plane corresponding to the eight hidden viewing angles. Moreover, the compasses at this time respectively correspond to eight of the hidden second operation surfaces. When the user needs to switch to the hidden first operation surface, the user can quickly perform positioning through the compass.

Scenario 2: Switch the angle to observe the part design. For example: the design drawing of a part, use ViewCube to switch angles to observe its design structure, see Figure 14-Figure 20.

Scene 3: Architectural design drawings. Architectural setting drawings will often ask for southwest isometric drawings. See Figure 21-Figure 22.

Scene 4: Multiple 3D models in a 3D scene. In order to facilitate the observation of multi-directional or multi-perspective views of each three-dimensional model, it is often required to provide views from various perspectives, see Figures 23 to 48.

Referring to Figures 24 to 27, when some first operation planes in the three-dimensional representation are selected, some other second-type operation planes will be hidden, and at the same time, the second operation planes are switched to the corresponding auxiliary state (for example, become Triangular operating planes) are respectively positioned at the operating planes corresponding to the eight hidden viewing angles, so that when another second operating plane is selected, the current viewing angle is switched to the corresponding first operating plane. For example, when an auxiliary state second operating plane in the middle of the left side of the 26-hedron in Figure 25 is selected, the current perspective of the drawing area is switched to the left perspective. See Figure 26, which presents the left view of the three-dimensional model; or, when selected When the second operating plane is in an auxiliary state in the middle of the right side of the 26-hedron in Figure 25, the current perspective of the drawing area is switched to the rear view perspective. See Figure 27, which shows the right view of the three-dimensional model.

The view navigation device of the present invention adopts a 26-hedron. Compared with the existing view navigation device, it provides users with more viewing directions that are more intuitive in terms of visual display. Each face has a normal direction, and each normal direction It can reflect the user's observation direction (or view direction). From the user's perspective, the observation direction can be intuitively imagined through the clicked surface, and the view to be observed can be intuitively and accurately positioned through the corresponding view operation plane. direction (or viewing angle direction), and the operation is simple, very convenient and fast. That is to say, the present invention presents the selection area (or view direction) in a plane manner, allowing the user to select the corresponding view direction to switch more intuitively, conveniently and quickly, which greatly improves the user experience.

From the perspective of learning a new function, the design of the view navigation device of the present invention is closer to the user's usage habits, conforms to the design rules and requirements of various industries, and effectively reduces learning costs. At the same time, for a user who is not familiar with the ViewCube function, there is no need for the user to understand it to a certain extent in advance, but can be used directly. Compared with the existing technology that combines the points, edges (lines), and faces of the cube into They are all used as view operation objects. There is no need for the user to know in advance which places can be operated, which places can be clicked, what effect will be obtained after clicking, and finally go through the actual operation to verify it. Instead, users can intuitively get the respective standard views. Corresponding operating plane. That is to say, in comparison, the design of the 26-hedron and the compass of the present application allows the user to easily realize that these operating planes represent different observation directions (or view directions, or viewing angles) at a glance, and can By clicking on the operating plane to switch views, you can naturally imagine/correspond to the viewing direction of the view after clicking. In other words, this "face-to-face" operation mode is relatively easy to accept from the user's way of thinking.

It can be understood that the "face-to-face" operation mode in the present invention is also beneficial in that even if only a small ViewCube is provided in a limited area, it can assist the user in perceiving and imagining the overall three-dimensional model in three-dimensional space.

On the other hand, users can set the color of each operation surface and font according to their own preferences, making it more personalized.

The ViewCube of the present invention adopts a 26-sided design and is particularly suitable for industrial applications of CAD, especially in the fields of industrial design and construction. In the field of engineering drawing production, considering the usage scenarios of designers, the views of the CAD software are 6 up, down, front, left, and right. Basic plane, 45-degree bevel plane (12 facets), axonometric view (8 angle faces), a total of 26 faces. This 26-sided design already includes all standard drawing surfaces (such as plan, side elevation, front elevation, back elevation, southwest isometric, etc.). Users can have an unobstructed and comprehensive observation of the drawn drawing through these 26 surfaces. Entities are used to aid design. And ViewCube allows users to drag in any direction, so the 26-hedron design can basically meet the user's needs, and there will be no weak sense of direction caused by too many operable surfaces, which is easy to What troubles designers in drawing question.

And the compass design also has another function: the compass cooperates with the 26-hedron to locate the position. In the CAD drawing process, designers usually need to use UCS (user-defined coordinates) in their work. The ViewCube's cube rotates following the UCS coordinates, while the direction of the compass is fixed in the WCS (world coordinate system). Users can determine a rotation relationship of the design entity through the relative position of the compass and the cube. When the view is switched to the front, rear, left, right and related prisms, the compass is converted into 8 triangles, pointing to 8 hidden operating planes perpendicular to the view, which are used to assist in selecting these 8 faces. This is also an ingenious design of ViewCube.

In addition, the 26-hedron can be quickly and accurately positioned in a standard viewing direction, while the existing free rotation (or spherical manipulation of dynamic observation) method makes it difficult to accurately position.

In some embodiments, the view navigation device can also rotate in all directions (such as the 26-hedron rotating together with the compass, or the 26-hedron rotating relative to the compass). Specifically, the view navigation device can rotate along the direction pointed by the user (for example, through an operation issued by a mouse). command) to rotate in any direction. During the operation of the application, the user can choose to perform different operations on the view navigation device based on the actual needs of the current scene, such as rotating to switch views, inverting to switch views, or selecting a specific operating plane to switch views.

In some embodiments, the view navigation device further includes a left turn control, and the method further includes the step of: when the user selects the left turn control, moving the view navigation device based on at least one preset angle (for example, 90°) Turn left, and turn the three-dimensional scene or the three-dimensional model left based on the corresponding angle.

Similarly, in some embodiments, the view navigation device further includes a right turn control. When the user selects the right turn control, the view navigation device is turned right based on at least one preset angle (for example, 90°). And the three-dimensional scene or the three-dimensional model is turned right based on the corresponding angle.

Embodiment 2

Based on the above method, the present invention also provides a view navigation device in a three-dimensional scene, as shown in Figure 51, which includes:

The display module 10 is configured to display a three-dimensional scene or a three-dimensional model;

The view navigation display module 20 is configured to display a three-dimensional representation of the view navigation device. The three-dimensional representation includes a plurality of first operation planes corresponding to different standard view planes of the three-dimensional scene or three-dimensional model, wherein the first operation plane is represented by In order to reflect the user coordinate space, and each of the first operation planes corresponds to the view direction of one of the standard view planes, the first operation plane corresponds to the corresponding standard view plane in space and function;

The view navigation operation module 30 is configured to respond to any first operation plane (or any operation plane) selected by the user, and use the view direction corresponding to the first operation plane selected by the user as the current View direction, and reorient the 3D scene or 3D model to display the standard view plane of the 3D scene or 3D model in the current view direction.

In some embodiments, there are 26 first operation planes, and the 26 first operation planes are enclosed to form a 26-hedron, wherein the first operation plane corresponds to a standard view plane in both space and function. As shown in Figures 1 to 10, the first operating plane is each face of the 26-hedron in the figure.

In some embodiments, a plurality of second operating planes surround the 26-hedron. As shown in FIG. 1 , a plurality of second operating planes surround a ring (preferably in the form of a compass) provided below the second operating 26-hedron.

In some embodiments, when the user selects any first-type operation plane in the first operation plane so that the second-type operation plane in the first operation plane is hidden, the second operation plane is used to assist positioning and is hidden. The second type of operating plane.

In some embodiments, there are eight second operating planes, and they are surrounded by a 26-hedron in the form of a compass, as shown in Figures 1-10.

In some embodiments, the 26-hedron is used to reflect the user coordinate space, and the compass is used to reflect the world coordinate space. When the user coordinate space is consistent with the world coordinate space, the 8 second operation planes and the 8 first operations in the 26-hedron Planes correspond one to one in space.

In some embodiments, the view navigation device further includes: a multi-function module. Wherein, the multi-function module includes: an inversion unit configured to display the manipulation control of the view navigation device; the manipulation control includes: an inversion control; when the user selects the inversion control, the view navigation device is based on a preset at least An inversion scheme is used to invert, and the three-dimensional scene or three-dimensional model is inverted based on the corresponding inversion scheme. The inversion scheme includes: reversal direction and reversal angle, where the reversal direction optionally includes: up, and/or down, and/or left, and/or right.

In this embodiment, any view can be accurately determined and positioned (or in other words, the three-dimensional scene or three-dimensional model can be directly reversed to a spatially determined view plane by selecting the corresponding button). The reversal function in this embodiment improves the accuracy and convenience of view switching. Moreover, this method is more adaptable to some special scenarios in CAD. For example, when users edit three-dimensional objects, they need to view or modify them from different directions. For example, when users view a table from top to bottom, they sometimes want to quickly switch to the bottom, that is, look from bottom to top.

The synergistic effect of the three modes of inversion function, 26-hedron switching, and compass switching in this embodiment enables users to quickly review entities based on the mutual cooperation of the three modes during actual operations. In other words, the synergistic effect in this embodiment allows the user to quickly and conveniently switch between multiple viewing angle directions (including standard views or non-standard views) accurately, so as to achieve rapid review of multiple viewing angle positions of entities.

In some embodiments, the multi-functional module includes: a property configuration unit configured to display a property configuration control of the view navigation device, and when the user selects the property configuration control, the properties of the view navigation device can be configured.

Further, in some embodiments, the attributes include: the size of each first operating plane, and/or the size of the second operating plane, and/or the font of the text displayed on the first and second operating planes, and/or The color of each first and second operating plane.

For example, in some embodiments, the dimensions of the first and second operating planes include: length, width, side length and other attributes of the planes.

Embodiment 3

A third aspect of the present invention provides a computer program product for use on a computer system for displaying a three-dimensional scene on a display device. The computer program product includes a computer usable medium having computer readable program code thereon. , the computer-readable program code includes: program code for processing graphics data to present a three-dimensional model/three-dimensional scene; program code for displaying the three-dimensional model or the three-dimensional scene; program code for presenting a view navigation device The program code of the three-dimensional representation, wherein the three-dimensional representation includes a plurality of first operation planes corresponding to different standard view planes of the three-dimensional scene or three-dimensional model, wherein the first operation plane is used to reflect the user coordinate space, And each first operation plane corresponds to the view direction of one of the standard view planes, and the first operation plane corresponds to the corresponding standard view plane in space and function; used to display the view navigation The program code of the device, and when any operating plane of the view navigation device is selected on the display device, the view direction/viewing angle direction corresponding to the selected operating plane is used as the current view direction/current viewing angle direction, and the The three-dimensional scene or the three-dimensional model is reoriented to display a standard view plane of the three-dimensional scene or the three-dimensional model in the current view direction.

Exemplary hardware and software environments for implementing one or more embodiments of the invention include computers, which may be user/client computers, server computers, or database computers. A computer includes a processor and memory, such as random access memory (RAM). Computers may be coupled and/or integrated with other devices, including input/output (I/O) devices such as keyboards, cursor control devices (such as mice, pointing devices, pens and tablets, touch screens, multi-touch devices, etc.) and printer. In one or more embodiments, a computer may be coupled to or incorporated into a portable or media viewing/listening device (eg, MP3 player, iPod ^™ , Nook ^™ , portable digital video player, cellular device, personal digital assistant, etc.). In another embodiment, a computer may include a multi-touch device, a mobile phone, a gaming system, an Internet-enabled television, a television set-top box, or other Internet-enabled device executing on a variety of platforms and operating systems.

In one embodiment, the computer operates with a general-purpose processor executing instructions defined by a computer program under control of an operating system. A computer program and/or operating system may be stored in memory and may interface with a user and/or other devices to accept input and commands and provide output and instructions in accordance with the input and commands and instructions defined by the computer program and operating system. result.

The output/results may be displayed on a monitor or provided to other devices for display or further processing or manipulation. In one embodiment, the display includes a liquid crystal display (LCD) having a plurality of individually addressable liquid crystals. Alternatively, the display may include a light emitting diode (LED) display with clusters of red, green and blue diodes driven together to form full color pixels. Each liquid crystal or pixel of the display becomes opaque or translucent to form part of an image on the display in response to data or information generated by the processor's application of input and commands in accordance with instructions from a computer program and/or operating system.

In various embodiments of the invention, the display is a 3D display device, which may include a 3D-enabled display (e.g., a 3D television or monitor), a head-mounted display (e.g., a head-mounted display (e.g., with two small LCDs or an OLED [organic Helmets or glasses for light-emitting diode displays with magnifying glasses, one for each eye), active or passive 3D viewers (e.g., LC shutter glasses, linearly polarized glasses, circularly polarized glasses, etc.), etc. In this regard, any technology that can be used to view 3D stereoscopic images is represented by a display. Additionally, one or more stereo cameras may be configured to communicate with the computer to enable 3D display on the 3D display.

3D images can be provided through a graphical user interface (GUI) module. Although the GUI module is described as a separate module, the instructions that perform the GUI functions may reside in or be distributed within the operating system, a computer program, or be implemented using special purpose memory and processors.

In one or more embodiments, the display is integrated with the computer and includes a multi-touch device having a touch-sensitive surface (eg, a track pod or a touch screen) with the ability to recognize the presence of two or more points of contact with the surface Ability. Examples of multi-touch devices include mobile devices (such as iPhone ^TM , Nexus S ^TM , Droid ^TM devices, etc.), tablet computers (such as iPad ^TM , HP Touchpad ^TM ), portable/handheld game/music/video players/consoles devices (such as iPod Touch ^TM , MP3 players, Nintendo 3DS ^TM , PlayStation portable ^TM, etc.), touch desktops and walls (such as projecting images through acrylic and/or glass, and then backlighting the images with LEDs).

Some or all of the operations performed by a computer in accordance with computer program instructions may be implemented in a special-purpose processor. In this embodiment, some or all of the instructions of the computer program may be implemented by firmware instructions stored in a read-only memory (ROM), programmable read-only memory (PROM), or flash memory located on a dedicated processor or memory middle. A special purpose processor may also be hardwired through circuit design to perform some or all of the operations required to implement the invention. Additionally, a special-purpose processor may be a hybrid processor that includes specialized circuitry for performing a subset of functions, as well as additional circuitry for performing more general functions (such as responding to computer program instructions). In one embodiment, the special purpose processor is an application specific integrated circuit (ASIC).

Computers may also implement compilers, which allow applications or computer programs written in a programming language (such as COBOL, Pascal, C++, FORTRAN, or other languages) to be translated into code readable by the processor. Alternatively, a compiler can be an interpreter that executes instructions/source code directly, converts the source code into an intermediate representation to be executed, or executes stored precompiled code. Such source code can be written in various programming languages, such as Java ^™ , Perl ^™ , Basic ^™ , etc. Once completed, the application or computer program uses the relationships and logic generated by the compiler to access and manipulate the data received from the I/O device and stored in the computer's memory.

The computer also optionally includes external communications devices, such as a modem, satellite link, Ethernet card, or other device for accepting input from and providing output to other computers.

In one embodiment, instructions implementing the operating system, computer program, and compiler are tangibly embodied in a non-transitory computer-readable medium, such as a data storage device, which may include one or more fixed or removable data Storage devices such as compressed drives, floppy drives, hard drives, CD-ROM drives, tape drives, etc. Additionally, operating systems and computer programs consist of computer program instructions that, when accessed, read, and executed by a computer, cause the computer to perform necessary steps.

Of course, those skilled in the art will recognize that any combination of the components described above, or any number of different components, peripherals and other devices, may be used with the computer.

Distributed computer systems use a network to connect client computers to server computers. A typical resource mix might include a network, including the Internet, a lan (local area network), a wan (wide area network), an SNA (system network architecture) network, or similar personal computing clients.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence or the part that contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk, CD), including several instructions to cause a computer terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of the present invention, many forms can be made without departing from the spirit of the present invention and the scope protected by the claims, and these all fall within the protection of the present invention.

Claims

A view navigation method in a three-dimensional scene, which is characterized by including the steps:

Display a three-dimensional scene or three-dimensional model;

Display a three-dimensional representation of the view navigation device, the three-dimensional representation including a plurality of first operation planes corresponding to different standard view planes of the three-dimensional scene or three-dimensional model, wherein the first operation plane is used to reflect the user coordinate space, and Each of the first operation planes corresponds to the view direction of one of the standard view planes, and the first operation plane corresponds to the corresponding standard view plane in space and function;

In response to any operation plane selected by the user, the view direction corresponding to the operation plane selected by the user is used as the current view direction, and the three-dimensional scene or the three-dimensional model is reoriented to display the three-dimensional scene or the three-dimensional model. The standard view plane of the three-dimensional scene or the three-dimensional model in the current view direction.
The view navigation method in a three-dimensional scene according to claim 1, wherein there are 26 first operation planes, and the 26 first operation planes enclose a 26-hedron.
The view navigation method in a three-dimensional scene according to claim 2, wherein the three-dimensional representation further includes:

A plurality of second operation planes, wherein the second operation plane is used to reflect the world coordinate space, and each second operation plane corresponds to a view direction of one of the standard view planes.
The view navigation method in a three-dimensional scene according to claim 3, characterized in that a plurality of the second operation planes surround the 26-hedron.
The view navigation method in a three-dimensional scene according to claim 4, further comprising the step of: when the user selects any first type of operation plane in the first operation plane, the first operation plane When the second type of operation plane is hidden, the second type of operation plane is used to assist in positioning the hidden second type of operation plane; and/or,

There are eight second operating planes, and they are surrounded by the 26-hedron in the form of a compass.
The view navigation method in a three-dimensional scene according to claim 5, characterized in that when the user coordinate space is consistent with the world coordinate space, 8 second operation planes are consistent with 8 of the 26-hedron. Each of the first operating planes corresponds one to one in space.
The view navigation method in a three-dimensional scene according to claim 3, further comprising the step of: displaying the control controls of the view navigation device; the control controls include: an inversion control; when the user selects the inversion control When, the view navigation device is inverted based on at least one preset inversion scheme, and the three-dimensional scene or the three-dimensional model is inverted based on the corresponding inversion scheme, the inversion scheme includes : reversal direction and reversal angle, wherein the reversal direction optionally includes: up, and/or down, and/or left, and/or right;

and / or,

It also includes the step of: displaying an attribute configuration control of the view navigation device. When the user selects the attribute configuration control, the attributes of the view navigation device can be configured, wherein the attributes include: each of the first operation planes. size, and/or the size of the second operating plane, and/or the font of the text displayed on the first and second operating planes, and/or the color of each first and second operating plane.
A view navigation device in a three-dimensional scene, which is characterized by including:

A display module configured to display a three-dimensional scene or a three-dimensional model;

A view navigation display module configured to display a three-dimensional representation of the view navigation device, the three-dimensional representation including a plurality of first operation planes corresponding to different standard view planes of the three-dimensional scene or the three-dimensional model, wherein the first operation plane Used to reflect the user coordinate space, and each first operation plane corresponds to the view direction of one of the standard view planes, and the first operation plane corresponds to the corresponding standard view plane in space and function;

The view navigation operation module is configured to respond to any operation plane selected by the user, use the view direction corresponding to the first operation plane selected by the user as the current view direction, and adjust the three-dimensional scene or The three-dimensional model is reoriented to display the three-dimensional scene or the standard view plane of the three-dimensional model in the current view direction.
The view navigation device according to claim 8, wherein there are 26 first operation planes, and the 26 first operation planes enclose a 26-hedron.
A computer program product for use on a computer system for displaying a three-dimensional scene on a display device, the computer program product comprising a computer usable medium having computer readable program code thereon, the computer readable program code comprising:

Program code for processing graphics data to render three-dimensional models/scenes;

Program code for displaying the three-dimensional model or the three-dimensional scene;

Program code for presenting a three-dimensional representation of a view navigation device, wherein the three-dimensional representation includes a plurality of first operating planes corresponding to different standard view planes of the three-dimensional scene or three-dimensional model, wherein the first operating plane is represented by In order to reflect the user coordinate space, and each of the first operation planes corresponds to the view direction of one of the standard view planes, the first operation plane corresponds to the corresponding standard view plane in space and function;

Program code for displaying the view navigation device, and when any operation plane of the view navigation device is selected on the display device, the view direction corresponding to the selected operation plane is used as the current view direction, and the The three-dimensional scene or the three-dimensional model is reoriented to display a standard view plane of the three-dimensional scene or the three-dimensional model in the current view direction.