JP3327734B2 - Graphic processing method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic processing method and apparatus for creating a three-dimensional graphic corresponding to a plurality of planar graphics.

[0002]

2. Description of the Related Art Conventionally, in a graphic processing system such as CAD, three-dimensional graphics based on a plurality of planar graphics expressed by graphics or the like are used.
When a three-dimensional figure is created, the shape of a surface is defined by designating the corresponding surface shape of another figure, and a three-dimensional surface (surface) modeling process is performed.

[0003]

However, according to the conventional method, a figure represented by a drawing or the like is not directly converted into a three-dimensional surface (surface) model and displayed.

That is, conventionally, when defining the shape of a surface, only one element can be designated as the corresponding surface shape. First, the surface is divided by the width of the corresponding surface shape, and then a three-dimensional model is created. Processing was being performed. For this reason, it takes much time and effort to create a three-dimensional figure, and the number of detailed operations increases, which has caused a display error of the figure due to an operation error or the like.

[0005]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems, and has the following arrangement as one means for solving the above-mentioned problems.

That is, closed area designating means for designating a closed area to be subjected to a three-dimensional processing of a figure, surface shape defining means for defining the surface shape of the target closed area designated by the closed area designating means, when the surface shape defined by the surface shape definition means determines that the determination means are either defined by a plurality of surface elements, the surface shape by the determining means is defined by a plurality of face elements Is the position where the face element changes
Discriminating means for determining the surface element,
And a redefining means for dividing the closed area based on the position at which the closed area changes, and redefining the surface shape of the divided closed area.

[0007] For example, the surface shape defining means instructs a method of defining the surface shape of the target closed area specified by the closed area specifying means, and subsequently specifies an element defining the surface shape of the target closed area. After that, the surface shape of the target closed area is defined. Further, for example, the surface shape of the closed area redefined by the redefining unit is displayed as a three-dimensional surface (surface) model, or the determination unit determines that the surface shape is defined by a single element. In this case, a display means is provided for displaying the surface shape of the closed area defined by the definition means in a three-dimensional surface (surface) model without redefinition.

[0008]

With the above arrangement, a three-dimensional model can be created and displayed directly on the basis of a figure represented by a drawing or the like, which has been impossible in the past. This can save the trouble of inputting the shape and the like for creating the figure of the three-dimensional model, and can greatly improve the accuracy of the created three-dimensional figure.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a graphic processing system to which a composite plane division system according to an embodiment of the present invention is applied.

In FIG. 1, reference numeral 11 denotes an input device having a keyboard device, a mouse, and the like.
It has an instruction for an element displayed on the screen of the display device 14, an instruction for a position on the screen, and other input functions. Reference numeral 12 denotes a storage device having a semiconductor memory, a magnetic disk, and the like, and is a drawing to be processed (consisting of a top view, a bottom view, a front view, a right side view, a left side view, a back view, and the like), Assumed closed area, defined surface shape,
The three-dimensional surface (surface) model generated from the closed region and the surface shape by the graphic processing system of the present embodiment, and other various information are stored.

Reference numeral 13 denotes a central processing unit which controls the entire apparatus of the present embodiment. Various control programs for executing various controls of the graphic processing system of the present embodiment are loaded and stored in the storage device 12. , Processing, writing, and other various controls.

A display device 14 displays various drawings, closed regions, surface shapes, menus, various messages, a three-dimensional surface (surface) model generated by the graphic processing system of the present embodiment from the closed regions and surface shapes, and the like. indicate.

The operation of this embodiment having the above configuration will be described below.

FIG. 2 is a flowchart showing a composite plane dividing process in the graphic processing system of the embodiment. The control program for executing the processing of FIG. 2 is stored in the storage device 12, and is loaded into the central processing unit 13 and executed.

In the present embodiment, first, in step S1, graphic information (for example, an image of a drawing) consisting of a top view 30, a right view 31 and a plan view 32 as shown in FIG. ) Is read into the central processing unit 13. Next, in step S2, the graphic is closed while checking the relationship between graphic elements such as line segments and arcs in the drawing, that is, whether they are adjacent or connected, and the result is stored in the storage device 12. Then, the image is displayed on the display device 14.
The closed region referred to here is, for example, a region configured by a closed loop as shown in FIG.
And has 0 or more inner loops.

Next, in step S3, the surface shape is displayed on the display device 1.
4 messages and menus (PLAN
(E, SECTION, ROT), using the input device 11 to designate an arbitrary closed region that has been closed. Then, in the following step S4, a shape element corresponding to the closed area designated in step S3 is designated using the input device 11 while confirming the display on the display device 14 as in step S2, and this definition method is stored in the storage device 12. Is stored as definition information. Next, in step S5, the surface shape element is displayed on a message or menu (PL) displayed on the display device 14.
(ANE, SECTION, ROT), and instructs using the input device 11, and stores the defined surface shape information in the storage device 12. Then, in step S 6, the definition of the surface shape is instructed using the input device 11 in accordance with the message or menu (PLANE, SECTION, ROT) displayed on the display device 14 and stored in the storage device 12.

FIG. 5 is a view showing an example of a screen for defining the surface shape of the closed area. A menu 51 defines a definition method (section) using the input device 11, and the top view 30 is closed. A point 53 of the area 52 is specified, and an element 54 corresponding to the surface shape of the closed area 52 is specified from the right side view 31 to define the surface shape of the closed area.

Here, in the closed area where the surface shape is defined,
As shown in FIG. 6A, a closed area 61 having a single surface 62 (hereinafter referred to as a single surface) and a closed region 61 having a closed surface as shown in FIG. There are two types of regions 63 whose surface shapes are composed of two or more different shapes 64 and 65 that are not on the same straight line, the same arc, or the same ellipse.

With the above processing, the closed area and the surface shape necessary for dividing the composite surface are prepared. In the following step S7, it is determined whether the closed area is a single plane or a composite plane from the closed area definition information stored in the storage device 12 by the above processing. In this process, first, the definition information of the closed area stored in the storage device 12 is read, and the elements specified in the surface shape in the central processing unit 13 are sequentially rearranged from the coordinate information of the start point and the end point.

For example, as shown in FIG. 7, when the surface shape is defined by designating five elements (71, 72, 73, 74, 75), 72 → 74 is determined by the distance between the start point and the end point.
→ 73 → 71 → 75

Next, in the determined order, comparison of the element type (line segment, arc, elliptical arc) with the next element, and the same element from the element data (information such as start point, end point, center, major axis, minor axis, etc.) Upper (same straight line, same circle, same ellipse) determination is performed, and the number of elements having different element types or not being on the same element even with the same element type is determined as the number of surface configuration elements.

For example, as shown in FIG. 8A, the element types are compared in the rearranged order (72 → 74 → 73 → 71 → 75), and the same shape is determined. First, element 72 and element 74
In the comparison, the element types are the same (line segment) and are found to be on the same straight line 81 from the element data (information on the start point and end point).
An element 82 obtained by combining 4 is obtained. Next combined element 82
And the next element 73 is compared. Since the element types of the element 82 and the element 73 are different between the line segment and the arc, it is determined that they are not the same shape, the element 82 is set as the first component, and the element 73 and the element 73 are compared.

As described above, the element 71 and the element 75 are compared, and the constituent elements (82, 73,
83). A closed area where the number of components obtained is two or more is determined as a composite plane, and one closed area is determined as a single plane. If it is determined in step S7 that the image is a single surface, the process proceeds to step S10 described below.

On the other hand, if it is determined in step S7 that the plane is a composite plane, the flow advances to step S8 to divide a closed area. In this processing, the central processing unit 13 divides the closed area by the length of the determined component, and divides the composite plane into a single plane.

For example, as shown in FIG. 9A, when the components of the surface shape of the closed area 70 are 82, 73, and 83,
First, an intersection 91 between the components 82 and 73 and an intersection 92 between 73 and 83 are determined. Next, as shown in FIG. 9B, the closed area 70 is defined by the intersection 91 and the intersection 92 based on the relationship between the plan view and the top view.
Are divided by line segments 93 and 94 corresponding to the closed regions (95, 96, and) corresponding to the respective surface shape components (82, 73, and 83).
97) is determined while checking the adjacency relationship, connection state, and the like of graphic elements such as line segments and arcs.

Next, the process proceeds to step S9, where the surface shape of the divided closed area is redefined. In this processing, the closed area information and the surface shape definition information of the original closed area 70 divided by the closed area division processing in step S8 are deleted from the storage device 12, and the newly obtained closed area (95, 96, 97) Is stored in the storage device 12.

In this way, three-dimensional processing is performed based on the surface shape of the closed area stored on the storage device 12 and the definition information, and a three-dimensional surface model is generated and stored in the storage device 12. Then, in step S10, the three-dimensional surface model defined on the storage device 12 is displayed on the display device 14 as shown in FIG.

As described above, according to the surface shape defining method of the present embodiment, a step of designating a closed area to be subjected to a process of converting a figure represented in a drawing or the like into a three-dimensional pattern is performed. A step of designating a shape defining method, a step of designating an element defining a surface shape of the target closed region, and a step of defining a surface shape of the target closed region, wherein the surface shape of the closed region is A step of determining whether the closed area is defined by a plurality of elements; a step of dividing the closed area by the number of surface shapes; a step of redefining the surface shape of the divided closed area; A step of displaying a surface (surface) model, thereby creating a figure directly converted into a three-dimensional surface (surface) model on the basis of a figure expressed in a drawing or the like, which was impossible in the past. It can be displayed Te.

As a result, it is possible to omit the trouble of inputting a shape and the like for creating a figure of a three-dimensional model, and to obtain an effect that the accuracy of the created three-dimensional figure can be greatly improved.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of one device. Needless to say, the present invention can be applied to a case where the present invention is achieved by supplying a program to a system or an apparatus.

[0032]

As described above, according to the present invention, a three-dimensional surface (surface) model is directly formed on the basis of a figure expressed in a drawing or the like, which has been impossible in the past. Can be displayed. This can save the trouble of inputting the shape and the like for creating the figure of the three-dimensional model, and can greatly improve the accuracy of the created three-dimensional figure.

[0033]

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a graphic processing system according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a composite plane division process according to the embodiment.

FIG. 3 is a diagram showing an example of an input drawing.

FIG. 4 is a diagram illustrating an example of the structure of a closed region according to the present embodiment.

FIG. 5 is a diagram illustrating an example of a surface shape definition of a target closed region in the present embodiment.

FIG. 6 is a diagram illustrating a single surface / composite surface in the present embodiment.

FIG. 7 is a diagram showing defining elements of a surface shape in the embodiment.

FIG. 8 is a diagram illustrating an example of determining a composite surface according to the present embodiment.

FIG. 9 is a diagram showing an example of compound plane division in this embodiment.

FIG. 10 is a diagram showing a display example of a three-dimensional surface model.

[Explanation of symbols]

 Reference Signs List 11 input device 12 storage device 13 central processing unit 14 display device

Claims (8)

(57) [Claims] 1. A and closed area indication step of indicating the closed region to be processed for 3-dimensional graphics stored in the storage means, display means closed area designated by the closed area instruction step
A closed region display step of displaying on the surface shape definition step of defining for based the surface shape of the display vs. <br/> elephant closed area displayed on unit by the closed region display step to the instruction indicating means, said face If the surface shape defined by the shape definition process is determined to a determination step by either determining means are defined by a plurality of surface elements, the surface shape by the determination step is defined by a plurality of face elements Is where the face element changes
Determining the position by the calculating means, and determining the position based on the position at which the surface element determined in the determining step is changed.
And re-defining the surface shape of the divided closed area based on the divided area. Wherein said surface shape definition step finger of said instruction means
Based on the indication, the method of defining the surface shape of the target closed region specified in the closed region specifying step is instructed, and subsequently, the element defining the surface shape of the target closed region is specified, and then the surface shape of the target closed region is specified. 2. The graphic processing method according to claim 1, wherein the graphic processing method is defined. 3. The display device according to claim 1, further comprising a display control step of displaying the surface shape of the closed area redefined in the redefinition step on the display means in a three-dimensional surface (surface) model. 2. The graphic processing method according to any one of 2. Wherein when it is determined that the determination step in surface shape is defined by a single element, the surface shape of the defined steps closed area defined by without the redefinition process
Graphic processing method according to claim 1 or 2, characterized in that a display control step of three-dimensional roughening (surface) model displayed on the display means. 5. A closed area designating means for designating a closed area to be processed for three-dimensionally processing a figure; a surface shape defining means for defining a surface shape of the target closed area designated by the closed area designating means; when the surface shape defined by the surface shape definition means determines that the determination means are either defined by a plurality of surface elements, the surface shape by the determining means is defined by a plurality of face elements Is where the face element changes
Determining means for determining the position, and determining whether the surface element determined by the determining means is to be changed.
And a redefining means for redefining a surface shape of the divided closed area based on the divided closed area. 6. The surface shape defining means instructs a method of defining a surface shape of a target closed area specified by the closed area specifying means, and subsequently specifies an element defining a surface shape of the target closed area, 6. The graphic processing apparatus according to claim 5, wherein a surface shape of the target closed area is defined thereafter. 7. The display device according to claim 5, further comprising display means for displaying a three-dimensional surface model of the surface shape of the closed area redefined by the redefinition means. The graphic processing device described in the above. 8. When the determining means determines that the surface shape is defined by a single element, the surface shape of the closed area defined by the defining means is reduced by 3 without performing the redefining means. The graphic processing apparatus according to claim 5, further comprising a display unit configured to display a three-dimensional (surface) model.