JPH05298396A - Shape editing system for cad system - Google Patents

Abstract

PURPOSE:To provide a CAD system shape editing system capable of accurately and simply executing input operation for moving, rotating, or sweeping edition and improving operability and an edition time. CONSTITUTION:At the time of moving processing of a drawing shape, plural shape elements are stored as hierarchical structure of faces and blocks. To simplify the specification of an objective shape element, plural shape elements included in a shape to be moved are recognized (100) by the specification of only one shape element. A moving reference point is specified and then a moving reference axis is specified (101, 102). To easily specify the coordinate of a destination to be moved, the coordinates of the destination to be moved are specified (103) in the displayed state of the moving reference axis. The data of all recognized shape elements are updated (104) based upon the moving reference point and the coordinates of the destination to be moved. Feature parts in both rotating and sweeping operation are similarly executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shape editing system of a CAD (computer-aided design) system, for example, a moving process, a rotating process and a sweep process.

[0002]

2. Description of the Related Art In a conventional CAD system, in both a two-dimensional system and a three-dimensional system, when moving, rotating or sweeping a figure shape, each shape element (straight line, circle, arc) which constitutes the figure shape is edited. , Ellipse, elliptic arc, spline, etc.) is generally performed.

FIG. 2 is an explanatory diagram showing a definition example of shape data for a shape element. For example, for a straight line (strictly speaking, it is also called a straight line below), the shape data is defined by the coordinates of the end points of the straight line. In editing this straight line, the coordinates of the end points depend on the destination. Performs processing to make coordinates.

The conventional movement operation of the shape element is as follows. First, the operator uses the input device (keyboard, mouse, etc.) to specify the geometric element to be moved (recognized from the CAD system). After that, the movement reference point on the shape element is designated by using the input device. Then, the movement destination coordinates of this movement reference point are designated. As a result, the CAD system updates the shape element data to data corresponding to the destination and stores it again.

Further, the conventional rotation operation of the shape element has been as follows. An operator uses an input device (keyboard, mouse, etc.) to sequentially specify a shape element to be rotated and a rotation reference of the shape element. Then, rotation angle information about a predetermined rotation direction is designated. This allows
The CAD system updates the shape element data to data corresponding to the rotation destination and stores it again.

Further, in the case of a two-dimensional CAD system, the coordinate designation in such an operation is performed by the absolute coordinate designation or the relative coordinate designation in the display coordinate system using the keyboard or the defining coordinate system of the shape data. Further, the coordinates are designated by a pointing device such as a mouse, or these are used together, and in the case of a three-dimensional CAD system, the designation is made by the absolute coordinates or the relative coordinates described above using a keyboard.

[0007]

In practice, the operator executes the above-mentioned editing operation while visually observing the graphic shape displayed on the graphic display device. However, it is not easy to accurately recognize each coordinate in the coordinate system, and when the input device is used to specify each coordinate, it may be erroneously specified. In particular, when designating the destination of the reference point, it is easy to make an error because there is no reference figure shape. Further, even if the rotation reference is designated, it is not possible to visually recognize about which axis the rotation is performed, and the operation is likely to be erroneous. As a result, the editing operation may be redone from the beginning or from the middle.

The above-described editing for each shape element requires a plurality of input operations for editing each shape element. Therefore, it is often necessary to edit a graphic shape composed of a plurality of shape elements. In addition to the need for a designated operation, the operation is complicated, and in addition to the long editing time, the operation becomes more complicated when the above-mentioned mistake in specifying the destination or rotation reference occurs, Editing time will be very long.

Further, in practice, in the operation of a three-dimensional system, a shape element having a length in the projection direction (generally called the z direction) is designated, and a movement destination or a rotation destination is designated in the z direction. Therefore, as a pre-process prior to editing the shape element, the display image is enlarged or reduced, and the viewpoint of the display image is adjusted so that the surface of the graphic shape parallel to the z direction comes to the surface of the display image. By changing the direction, it is easy to specify the shape element in the z direction and the destination or the destination of rotation.

If such operations are included, more operations are required for editing and the editing time becomes longer.

Such a problem similarly arises not only in the above-described movement and rotation editing but also in the sweep editing for changing (shortening or extending) the length of the figure along a certain direction.

Therefore, it can be said that the conventional shape editing method is still insufficient in terms of usability.

The present invention has been made in consideration of the above points, and a CAD system capable of accurately and easily inputting an editing destination, an editing standard, etc., and improving operability and editing time. It is intended to provide a shape editing method of.

[0014]

In order to solve such a problem, a first aspect of the present invention is a moving reference point of a moving source in a shape editing method of a CAD system for moving or moving and copying at least one or more shape elements. After the is specified, the movement reference axis that extends in the movement direction that passes through this movement reference point is prompted, and the specified movement reference axis is displayed, and the destination information specified for the movement reference point is captured. Is characterized by.

The second aspect of the present invention is, in a shape editing method of a CAD system for rotating or rotationally copying at least one or more shape elements, after taking in the shape element information of the object to be rotated, the rotation reference which is the center of rotation. It is characterized in that the rotation amount information is fetched in a state in which the designation of the axis is urged and the designated rotation reference axis is displayed.

In both the first and second aspects of the present invention, data is stored by associating a shape with each shape element constituting the shape, and when one shape element is designated, the shape element is stored. It is preferable that all the shape elements of the shape including is to be edited, and the editing process involving the display of the movement reference axis or the rotation reference axis as described above is executed.

A third aspect of the present invention is a CA for performing a sweep for stretching or contracting at least one shape element.
In the shape editing method of the D system, after the reference point of the sweep process is designated, the sweep direction reference axis extending in the sweep direction passing through the sweep reference point is determined, and the determined sweep direction reference axis is displayed. The feature is that the position information of the sweep destination is captured.

Here, the shape and the shape elements constituting the shape are associated with each other to store data, and when one shape element is designated, a plurality of shape elements related to the shape element are stored. It is preferable to execute the editing process with the display of the sweep direction reference axis as described above as the sweep process target.

[0019]

According to the first aspect of the present invention, when at least one or more shape elements are moved or copied, the movement reference point of the movement source is designated so that the movement direction can be visually recognized and the movement destination can be accurately designated. After that, it prompts the user to specify the movement reference axis that extends in the movement direction that passes through this movement reference point, and with the specified movement reference axis displayed, the specified destination information for the movement reference point is imported. ..

The second aspect of the present invention, in the case of rotating or rotationally copying at least one or more shape elements,
In order to be able to visually recognize the rotation center axis and to perform the rotation operation accurately, after prompting to specify the rotation reference axis that is the rotation center after capturing the shape element information of the rotation target, the specified rotation reference axis was displayed. In this state, the rotation amount information is taken in.

In the first or second aspect of the present invention, since it is complicated to execute the editing process for each shape element included in the shape to be edited, the shape and the shape elements forming the shape are related to each other. It is preferable to store the data additionally and to edit all the shape elements of the shape including the shape element when one shape element is designated.

According to the third aspect of the present invention, when performing a sweep for extending or contracting at least one or more shape elements, the sweep processing reference point can be specified so that the sweep direction can be visually recognized and the sweep destination can be accurately specified. After the designation of, the sweep direction reference axis extending in the sweep direction passing through the sweep reference point is determined, and the position information of the sweep destination is captured while the determined sweep direction reference axis is displayed.

Since it is complicated to execute the sweep process for each shape element included in the shape to be swept, the shape and the shape elements forming the shape are associated with each other to store data. Every time, when one shape element is designated, it is preferable that a plurality of shape elements related to the shape element are targeted for sweep processing, and the edit processing accompanied by the display of the sweep direction reference axis as described above is executed.

[0024]

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

(A) Overall Configuration FIG. 3 is a functional block diagram showing the CAD system according to this embodiment centering on the shape editing function. Note that C
The actual configuration of the AD system is similar to the configuration of a general computer system that also has a graphic output device.

In FIG. 3, this CAD system 10
Is composed of an input device 11, a graphic display device 12, a graphic processing device 13, and a graphic storage device 14.

The input device 11 is equipped with, for example, a mouse and a keyboard, and is information instructed by an operator, that is, processing modes, shape elements (line segments, arcs, circles, etc.) and graphic coordinates (numerical values). Information such as (position) is fetched and given to the graphic processing device 13.

The graphic display device 12 is composed of, for example, a CRT display, and displays a shape graphic given from the graphic processing device 13 under the control of the graphic processing device 13 and a message to an operator.

The graphic processing device 13 edits the shape based on the information given from the input device 11, and controls the graphic display device 12 to display the shape graphic and other information. In addition, the shape data main body and the shape auxiliary data, which will be described later, are stored in the graphic storage device 14 or retrieved from the graphic storage device 14.

The graphic storage device 14 is composed of, for example, a disk device. In the case of this embodiment, the graphic storage device 14 stores a shape data main body storage unit 41 for storing the shape data main body and a shape auxiliary for storing the shape auxiliary data related to the shape data main body and used for editing the shape data main body. And a data (parametric data) storage unit 42.

The shape data body is, for example, data for each shape element according to the definition example shown in FIG. 2, and identification information and attribute information for each shape element are also added. The shape auxiliary data (parametric data) is element relationship data (surface definition data, block definition data, etc.) that represents the connection relationship of each shape element, and parameter data that represents the commonality of each shape element.

FIG. 4 is an explanatory diagram of element relationship data in the shape data body and the shape auxiliary data.

FIG. 4A is an explanatory diagram of an example of a shape (surface), and the shape element forming this shape indicates the type thereof and information that can be distinguished from other shape elements (for example, LIN).
E1) is given, and the coordinates according to the definition of FIG. 2 described above are clarified. In the case of this shape (surface), the content of the shape element table, which is the shape data main body, is a set of identification information and coordinates of the shape element, as shown in FIG. Each shape element is represented by coordinates with a certain reference point as the origin. The element relation data has a hierarchical structure based on a relational data structure. That is, as shown in the block definition table of FIG.
Underneath the shape (BODY), the surface (FA
CE) is related, and as shown in the surface definition table of FIG. 4C, shape elements such as a straight line (LINE) and a circle (CIRCLE) forming the surface are related to the lower layer of the surface. Has been. Therefore, the information of all the shape elements of the shape including the shape element can be extracted from the designation of one shape element.

The parameter data (not shown) may be assigned to the same group of straight lines extending in parallel and having the same length, or to the same group of arcs having the same radius and arc length. Parameters are added. Specifically, the element type and its length information are expressed together with the parameter identification information. For example, in the case of a rectangular parallelepiped, there are three types of parameters. Therefore, this parameter data also serves as grouping information of shape elements.

The graphic processing device 13 is composed of the following parts in detail. Input device 11, graphic display device 12, and graphic storage device 14 connected to the graphic processing device 13
An input capturing section 31 for controlling each of the above, and a display control section 3
2 and a storage control unit 33. In addition to the control configuration of such an external device, in order to edit the shape, the shape element edit processing unit 34 and the parametric shape edit processing unit 35 are included.
It has and. The shape element edit processing unit 34 performs movement, rotation, sweep, etc. for each shape element. The parametric shape editing processing unit 35 also uses the shape auxiliary data to perform movement, rotation, sweep, etc. of the entire shape. The edit processing units 34 and 35 have a built-in memory for buffering the shape element data and the like used for the edit processing and a memory for buffering the shape element data and the like in the display coordinate system.

(B) Editing Process Hereinafter, movement (including moving copy), rotation (including rotating copy) executed by the parametric shape editing processing unit 35,
The sweep and the sweep executed by the shape element edit processing unit 34 will be described. As described above, the parametric shape edit processing unit 35 and the shape element edit processing unit 34 actually correspond to the CPU and the main storage device, and at the time of the shape edit, the shape data main body and the shape assistant are transferred from the graphic storage device 14 to the main storage device. The data has been transferred, and the shape editing process is executed using the shape data main body and the shape auxiliary data transferred to the main storage device. Further, since the shape is displayed on the graphic display device 12, the parametric shape edit processing unit 35 and the shape element edit processing unit 34 receive the shape data (coordinates) in the display coordinate system in addition to the shape data indicating the actual size. Manage.

Therefore, the parametric shape edit processing unit 3
5 and the shape element edit processing unit 34, the buffer memory storing the data in the display coordinate system (two-dimensional coordinate system), the data in the definition coordinate system of the shape (shape data body), its attributes, etc. A buffer memory that stores
The buffer memory that stores the above-described shape auxiliary data in the coordinate system effectively functions in the graphic processing device 13.

In the following description, it is assumed that the coordinates are designated in the display coordinate system.

(B-1) Move Process and Move Copy Process First, the move process executed by the parametric shape edit processing unit 35 will be described.

FIG. 1 is a flow chart showing the moving process. Further, FIGS. 5 to 8 are explanatory views of the contents of the display image regarding this movement processing.

In the state where the image including the target shape is displayed on the graphic display device 12, the parametric shape edit processing unit 35 prompts the designation of any shape element included in the target shape. Display a message,
In response to this, the operator takes in the shape element designated by using the input device 11, recognizes all the shape elements of the shape including the designated shape element based on the above-mentioned element relation data,
The recognized shape element is displayed separately from other shape elements (step 100).

As the designation method at this time, the element identification information may be input using a keyboard, or the coordinates on the element may be input using a keyboard or a mouse. In the case of inputting the element identification information, it is necessary to refer to the buffer memory related to the shape data body to obtain the coordinate value in the defining coordinate system of the shape and convert the coordinate value in the display coordinate system.

Further, at the time of such processing, the recognized shape element is also set in the edit target element table.

For example, in a two-dimensional CAD system,
When the shape element E1 is designated when moving the shape F1 shown in FIG. 5, all the elements E1 to E5 are recognized as the elements to be moved based on the element relation data of the shape F1. Similarly, in the three-dimensional CAD system, when the shape element E10 is specified when the shape F2 shown in FIG. 6 is moved, all the elements E10 to E24 are the movement targets based on the element relation data of this shape F2. Recognized as an element.

When the shape element designation processing (recognition processing) is completed, the parametric shape edit processing unit 35 is executed.
Displays a message prompting the designation of any point (movement reference point) on the target shape, and accordingly, the operator takes in the movement reference point designated by using the input device 11 and recognizes it. The movement reference point is displayed so that the operator can visually recognize it (step 101).

As a designation method at this time, coordinate input using a keyboard, a mouse or the like is used. It is also possible to select the origin in the shape auxiliary data.

At the time of such processing, a shape element including the recognized movement reference point is also extracted and marked.

In practice, the end point of the shape element is often designated as the movement reference point. FIG. 5 shows the shape elements E3 and E.
4 shows the case where a common end point P1 is designated, and the shape elements E3 and E4 are marked. FIG. 6 shows a case where a common end point P2 is specified for the shape elements E18, E19, and E24, and the shape elements E18, E19, and E2 are specified.
4 is marked.

When the movement reference point designation processing (recognition processing) is completed, the parametric shape editing processing unit 35 is executed.
Displays a message for prompting the designation of the movement direction and the movement reference axis, and accordingly, the operator takes in and recognizes the movement reference axis designated using the input device 11, and the recognized movement reference axis is fixedly displayed. (Step 102).

For example, first, a movement reference axis extending in the x direction through the movement reference point is displayed, and the operator is asked whether or not this axis is acceptable. The movement reference axis extending in the direction is displayed and the operator is asked whether or not this axis is acceptable. Similarly, while changing the movement reference axis of the candidate passing through the movement reference point, the designated movement reference axis is taken in. .. The change order of the candidate movement reference axes is the x direction, the y direction, the z direction (in the case of a three-dimensional CAD system), and the extension direction of the linear element among the shape elements marked above.

Therefore, depending on how to specify the movement reference point, even if the same shape is the movement target,
The number and position of the candidate movement reference axes are different.

In the two-dimensional CAD system (including the case where the three-dimensional CAD system also performs the movement processing in the two-dimensional state), when the point A is designated as the movement reference point with respect to the shape F3 shown in FIG. Candidate reference axes are axes Xa and Y
a, and the candidates change in the order of Xa and Ya (note that
If no selection is made with the axis Ya displayed, the display returns to the axis Xa). On the other hand, for the shape F3 shown in FIG.
Is designated as the movement reference point, the movement reference axis candidates are the axes Xb, Yb, and Ab, and the candidates change in the order of Xb, Yb, and Ab. Further, in the three-dimensional CAD system, when the point C is designated as the movement reference point for the shape F4 shown in FIG. 8, the movement reference axis candidates are the axes Xc, Yc, and Zc, and the candidates change in this order. .. On the other hand, when the point D is designated as the movement reference point for the shape F4 shown in FIG. 8, the candidates for the movement reference axis are the axes Xd, Yd, Zd, and Ad, and the candidates change in this order.

Both FIG. 5 and FIG. 6 described above show the case where the movement reference axis in the x direction is designated.

When the movement reference axis designation processing (recognition processing) is completed, the parametric shape editing processing unit 35 is executed.
Displays a message prompting the designation of the movement destination coordinates of the movement reference point, and in response thereto, takes in the movement destination coordinates designated by the operator using the input device 11 (step 103). The movement reference axis is also fixedly displayed at this time.

As the specifying method, it is possible to input coordinates in the display coordinate system using the keyboard and coordinates in the coordinate system using the shape auxiliary data, but it is effective to specify using the mouse. That is, it is effective to move the cursor on the movement reference axis in accordance with the movement of the mouse and to click to capture the movement destination coordinates. Actually, rather than the operator obtaining the coordinate value of the destination by calculation or visual measurement,
It is easy to find the destination position on the display from the positional relationship with other shapes.

In FIG. 5 described above, the point P1A is set as the destination coordinate.
Is designated, and FIG. 6 described above shows the case where the point P2A is designated as the movement destination coordinate.

When the movement destination coordinates are designated in this way, movement amount information is calculated from the difference between the coordinates of the movement reference point and the movement destination coordinates, and then all the movement amount information set in the element table to be edited in step 100 is calculated. The destination coordinates for the shape element are calculated, the memory contents of the edit element table and various buffer memories are updated, and the destination shape is displayed (step 104). The shape before the movement is continuously displayed.

In the case of this embodiment, the destination coordinates calculated at this stage are both the coordinate value in the display coordinate system and the coordinate value in the coordinate system in the shape data body or the shape auxiliary data. At the stage, it is not stored in the graphic storage device 14.

By this processing, the moving shape F1A is displayed in the case of FIG. 5, and the moving shape F2A is displayed in the case of FIG.

After this, the parametric edit processing unit 35
Asks the operator whether to move in the other axis direction (step 105).

When the movement in the other axial direction is instructed, the process returns to step 102 described above. FIG. 5 shows a case where the movement processing in the y-axis direction is further instructed, and the final movement shape is the shape F1B.

In this way, when the operator performs the movement in the axial direction at least one time and the operator indicates that the movement direction is no longer present, after the display of the shape element, the movement reference axis, etc. is erased, the figure Have the operator confirm whether or not to store the destination shape in the storage device 14, execute the storage operation for the graphic storage device 14 when a storage instruction is given, and store it if no storage instruction is given. End the series of processing without any (steps 106, 10)
7).

In this way, by designating one shape element, the movement of the entire shape including the shape element can be executed, and further, by displaying the movement reference axis, the operator can easily designate the movement destination. can do.

It should be noted that the above-described movement processing and the movement copy processing in which both the shape before the movement and the shape after the movement are stored are substantially the same processing, and the buffer memory and the shape storage in the graphic processing device 13 are the same. Only the memory areas stored in the device 14 are different. Therefore, the detailed description of the moving copy process is omitted.

FIG. 9 is an explanatory diagram showing the difference in memory area between the moving process and the moving copy process. This Figure 9
As shown in FIG. 9A, in the case of the moving process, while the data of the moving destination shape is stored in the memory area where the data of the moving source shape is stored, as shown in FIG.
In the case of the moving copy processing, the data of the movement source shape is left as it is and the data of the movement destination shape is stored in a separate memory area.

(B-2) Rotation Processing and Rotational Copy Processing Next, the rotation processing executed by the parametric shape editing processing unit 35 will be described.

FIG. 10 is a flow chart showing this rotation processing. Further, FIG. 11 and FIG. 12 are explanatory diagrams of the display image contents regarding this rotation processing.

In the state where the image including the target shape is displayed on the graphic display device 12, the parametric shape edit processing unit 35 prompts the designation of any shape element included in the target shape. Display a message,
In response to this, the operator takes in the shape element designated by using the input device 11, recognizes all the shape elements of the shape including the designated shape element based on the above-mentioned element relation data,
The recognized shape element is displayed separately from other shape elements (step 200).

At the time of such processing, the recognized shape element is also set in the edit target element table.

For example, in a two-dimensional CAD system,
When rotating the shape F5 shown in FIG. 11, the shape element E3 is rotated.
When 1 is specified, all the elements E31 to E36 are recognized as elements to be rotated based on the element relation data of the shape F5. Similarly, in the three-dimensional CAD system, when the shape element E41 is specified when the shape F6 shown in FIG. 12 is rotated, all the elements E41 to E52 are to be rotated based on the element relation data of the shape F6. Recognized as an element.

When such shape element designation processing (recognition processing) is completed, the parametric shape edit processing unit 35 is executed.
Displays a message to ask the operator whether to arbitrarily set the rotation reference or use a standard rotation (step 201).

When an instruction to arbitrarily set is obtained, a message prompting the designation of any point (rotation reference point) on the target shape is displayed, and in response to this, the rotation designated by the operator using the input device 11 is displayed. The reference point is taken in and recognized, and the recognized movement reference point is displayed so as to be visually recognized by the operator (step 202). The designation method at this time is based on coordinate input using a keyboard or a mouse. It is also possible to select the origin in the shape auxiliary data.

At the time of such processing, a shape element including the recognized rotation reference point is also extracted and marked.

In practice, the end point of the shape element is often designated as the rotation reference point in any setting. FIG. 11 shows
This shows a case where a common end point P3 is specified for the shape elements E35 and E36, and the shape elements E35 and E36 are marked. FIG. 12 shows the shape elements E41, E44 and E4.
5 shows the case where the common end point P4 is designated, and the shape elements E41, E44 and E45 are marked.

When the rotation reference point designation processing (recognition processing) is completed, the parametric shape editing processing unit 35 is executed.
Displays a message prompting the user to specify the rotation reference axis and candidates for the rotation reference axis. In response to this, the operator inputs the input device 1
The rotation reference axis designated by 1 is taken in and recognized, and the recognized rotation reference axis is fixedly displayed (step 203).

For example, first, a rotation reference axis extending in the x direction through the rotation reference point is displayed and the operator is asked whether this axis is acceptable. If not, then the rotation reference point is passed through y. The rotation reference axis extending in the direction is displayed and the operator is asked whether or not this axis is acceptable. Similarly, while changing the candidate rotation reference axis that passes through the rotation reference point, the specified rotation reference axis is taken in. .. The candidate rotation reference axes are changed in the order of the x direction, the y direction, the z direction (including the case of the two-dimensional CAD system), and the extension direction of the linear element among the shape elements marked above.

On the other hand, when the operator gives an instruction for standard setting to the question in the processing in step 201, candidate rotation reference axes passing through the origin in the display coordinate system are sequentially displayed to prompt the instruction, and the designated rotation is given. The reference axis is fetched (step 204). In this case, the candidate rotation reference axes are changed in the order of x-direction, y-direction, and z-direction passing through the origin.

FIG. 11 described above shows z passing through the rotation reference point P3.
The rotation reference axis in the direction (vertical direction of the drawing) is designated, and FIG. 12 described above shows the case where the rotation reference axis in the x direction passing through the rotation reference point P4 is designated.

When the rotation reference axis designation processing (recognition processing) is completed, the parametric shape editing processing unit 35 is executed.
Displays a message prompting the user to specify the rotation angle in a predetermined rotation direction (for example, counterclockwise around the rotation reference axis), and in response to this, the operator selects the rotation angle specified using the input device 11. (Step 205). At this time, the rotation reference axis is also fixedly displayed.

FIG. 11 described above shows the case where the angle θ1 is designated as the rotation angle, and FIG. 12 described above shows the case where the angle θ2 is designated as the rotation angle.

When the rotation angle is designated in this way,
The rotation destination coordinates for all the shape elements set in the edit target element table in step 200 are calculated, the memory contents of the edit target element table and various buffer memories are updated, and the rotated shape is displayed (step 2
06).

In the case of this embodiment, the rotation coordinates calculated at this stage are both the coordinate values in the display coordinate system and the coordinate values in the coordinate system in the shape data body and the shape auxiliary data. Is not stored in the graphic storage device 14.

By this processing, the rotated shape F5A is displayed in the case of FIG. 11, and the rotated shape F6A is displayed in the case of FIG.

After this, the parametric edit processing section 35
Asks the operator whether or not to rotate around another rotation reference axis (step 207).

When the instruction to rotate also in other axial directions is given, the process returns to step 201 described above. In addition,
11 and 12 show a case where the rotation about one rotation reference axis is instructed.

In this way, the rotation around the rotation reference axis designated by the operator is executed at least once,
When it is instructed that there is no new rotation direction, after deleting the display of the shape elements and axes, the operator is asked to confirm whether or not to store the rotation shape in the graphic storage device 14, and the storage instruction is given. When the storage instruction is not given, on the other hand, the series of processing is terminated without storing (steps 208, 20).
9).

In this way, by designating one shape element, the rotation of the entire shape including the shape element can be performed, and the center of rotation can be clearly visually recognized by displaying the rotation reference axis.

The above-described rotation processing and the rotation copy processing in which both the pre-rotation shape and the post-rotation shape are stored are substantially the same processing, and the buffer memory and the graphic storage in the graphic processing device 13 are the same. Only the memory areas stored in the device 14 are different. Therefore, detailed description of the rotary copy process is omitted (see FIG. 9).

(B-3) Sweep Processing Before explaining the sweep processing, the shape change due to the sweep edit will be described first. FIG. 13 shows a graphic shape before and after the sweep process. FIG. 13A shows a graphic shape before processing, and this example is an example of a rectangular parallelepiped. As for the sweep process, when the sweep direction is specified, the same parameter parallel to that direction (common length)
A sweep performed by the parametric shape edit processing unit 35 (hereinafter, referred to as parametric sweep) that stretches or shrinks all shape elements that have, and a shape element that is parallel to the sweep direction when the sweep direction is designated. Shape element edit processing unit 34 that contracts
There is a sweep (hereinafter referred to as an individual sweep). FIG. 13B shows the figure shape after the parametric sweep processing. In this example, the z direction is designated as the sweep direction, and all straight lines E61 in the z direction are indicated.
~ E64 is stretched in that direction by a length D2-D1. FIG. 13C shows the figure shape after the processing of the individual sweep. In this example, the z direction is designated as the sweep direction, and the straight lines E61 and E62 are individually stretched by the length D2-D1.

Next, the parametric shape edit processing section 35.
Parametric sweep processing performed by the above will be described with reference to the flowchart of FIG. 14 and the sweep explanatory diagram of FIG.

When the parametric sweep process is designated by the input device 11, the process shown in FIG. 14 is started. Then, first, in a state where the image including the target shape is displayed on the graphic display device 12, the parametric shape editing processing unit 35 prompts the designation of any shape element included in the target shape. A message is displayed, and in response to this, the operator takes in the shape element specified by using the input device 11, recognizes all the shape elements including the specified shape element based on the above-mentioned element relation data, and recognizes the shape. The element is displayed separately from other shape elements (step 300). At the time of such processing, all the recognized shape elements are also set in the edit target element table.

Next, a message prompting the designation of any surface including the designated shape element is displayed, and in response to this, the operator takes in the surface designated by using the input device 11,
A sweep direction reference axis that intersects this plane and is parallel to any shape element is determined and displayed (step 301,
302). For example, a surface including a specified shape element is displayed, and a question is asked as to whether or not this surface is specified, and the specified surface is taken in. In addition, 1 which constitutes the designated surface
The sweep direction reference axis is displayed starting from the center point of each shape element.

Here, this face designation means that a plurality of shape elements having the same parameter data (having a common length) whose length is changed by sweeping are designated, and the lengths of these shape elements are designated. This means that you have specified the opposite faces whose position will be changed in that direction by the change.

For example, the rectangular parallelepiped shape shown in FIG. 15A is the sweep target shape F7, and the shape element (straight line) E7.
When 1 is designated, the designation of the surface S1 or S6 including the shape element E71 is prompted. When the surface S1 is designated, for example, as shown in FIG. 15B, the shape element E75 to which the center P5 of the shape element E74 forming this surface S1 is an end point and which intersects with this surface S1 The sweep direction reference line parallel to E78 is displayed. Where the shape element E
75 to E78 are shape elements whose length is changed by the sweep, and the surface S2 is a surface whose position is changed.

Next, the parametric shape edit processing unit 35.
Displays a message prompting the user to specify the position of the sweep destination, and in response thereto, takes in the position of the sweep destination designated by the operator using the input device 11 (step 303).
In this case also, the sweep direction reference axis is fixedly displayed. As a method for specifying this, it is possible to input coordinates in the display coordinate system using a keyboard and coordinates in the coordinate system using shape auxiliary data, but it is effective to specify using a mouse. That is, it is effective to move the cursor on the reference axis of the sweep direction according to the movement of the mouse, and click to capture the position of the sweep destination. Actually, it is easier for the operator to obtain the sweep position on the display from the positional relationship with other shapes, rather than obtaining the coordinate value of the sweep position by calculation or visual measurement.

When the position of the sweep destination is designated in this way, movement amount information is calculated from the difference between the coordinates of this position and the reference point of the sweep direction reference line, and then set in the element table to be edited in step 300. The changed coordinates for all the shape elements are calculated, the edit element table and the memory contents of various buffer memories are updated, and the sweep shape is displayed together with the original shape (step 30).
4).

More specifically, such a process will be described. The difference between the coordinates of the position of the sweep destination and the reference point of the sweep direction reference line is captured as the length of the shape element parallel to the sweep direction reference line (new parameter data), The coordinates of one end of these shape elements are updated by this length, and the coordinates of the shape element having this one end as an end are also changed. For example, in FIG.
As shown in (C), when the point P6 is designated as the position of the sweep destination, the length DS between the points P5 and P6 is detected,
The coordinates of the end points of the shape elements E75 to E78 intersecting the surface S2 are changed accordingly, and the shape elements E75 to E78 are changed.
The parameter data of the above is also changed accordingly, and further, all the shape elements E79 to E82 that form the surface S2 are changed.
The end point coordinates of are also changed accordingly. As a result, the shape F7A after the sweep is displayed.

In the state where the shape before and after the sweep and the sweep direction reference line are displayed, it is asked whether or not a new sweep shape is acceptable, that is, the graphic storage device 1
4 is stored. If a negative result is obtained, the process returns to the sweep position designation processing in step 303 described above, and if a positive result is obtained, the storing operation for the graphic storage device 14 is executed. (Steps 305 and 306). In this case, the storage operation for the shape element table is executed without changing the surface definition table and the block definition table (see FIG. 4). That is, the sweep processing only changes the end point coordinates of the shape element, and does not change the type of shape element forming a surface or the type of surface forming a block. Therefore, the memory area for storing these shape elements is not a new memory area but an area for storing data until now.

In this way, with a small number of specifying operations,
The lengths of shape elements having the same parameter data can be changed at the same time, and the end point coordinates of the shape elements included in the plane intersecting with the shape elements can be changed.

The display changes of the shape when the sweep processing is actually performed by the three-dimensional CAD system are shown in FIG.
It shows in (C).

Next, the individual sweep processing performed by the shape element edit processing unit 34 will be described with reference to the flowchart of FIG. 17 and FIG.
This will be described with reference to the sweep explanatory diagram.

When the individual sweep process is designated from the input device 11, the process shown in FIG. 17 is started. And first,
The image including the target shape is displayed on the graphic display device 12.
In the state displayed in, the shape element edit processing unit 3
4 displays a message prompting the designation of any shape element included in the target shape, and in response to this, the operator takes in the shape element designated using the input device 11, and based on the above-mentioned element relation data. All the shape elements including the designated shape element are recognized, and the recognized shape element is displayed separately from other shape elements (step 400). At the time of such processing, all the recognized shape elements are also set in the edit target element table. Note that, unlike the parametric sweep process, in the individual sweep process, the specified shape element itself is swept (the length is changed).

Next, a message prompting the designation of the sweep reference point is displayed, and the operator responds to this by input device 11
The sweep reference point designated by using is taken in, and the sweep direction reference axis corresponding to the sweep reference point is determined and displayed (steps 401, 402). For example, one end point, the other end point, or the center point of the designated shape element is displayed, and a question is asked as to whether or not this point is designated, and the designated reference point is taken in. Here, when the end point of the shape element is designated as the sweep reference point, the sweep direction reference axis that extends from the designated end point to the other end point and extends beyond that end point to a position where sweeping is possible is displayed. .. When the center point of the shape element is designated as the sweep reference point, the sweep direction reference axis that extends from the designated center point to both end points and extends beyond the both end points to the position where sweeping is possible is displayed. To do.

For example, a rectangular parallelepiped shape F shown in FIG.
8 is the shape to be swept, and the shape element (straight line) E9
When 1 is designated, the sweep reference point is selected from both end points and the center point of this shape element E91. When one end point P7 is designated, the sweep direction reference axis is displayed as shown in FIG. 18 (B1), and when the other end point P8 is designated, the sweep direction is shown as shown in FIG. 18 (B2). The reference axis is displayed, and when the center point P9 is designated, the sweep direction reference axis is displayed as shown in FIG. 18 (B3).

Next, the shape element edit processing unit 34 displays a message prompting the designation of the position of the sweep destination, and in response to this, the operator takes in the sweep position designated using the input device 11 (step 403). .. In this case also, the sweep direction reference axis is fixedly displayed. As the designation method, it is possible to input the coordinates in the display coordinate system using the keyboard and the coordinates in the coordinate system using the auxiliary shape data, but in this case, the designation using the mouse is also effective. That is, it is effective to move the cursor on the reference axis of the sweep direction according to the movement of the mouse, and click to capture the sweep position. When the center point of the shape element is designated as the reference point, the positions of the sweep destinations on both sides of the reference point are captured.

When the position of the sweep destination is designated in this way, the coordinates of the position of the sweep destination are set as the end points of the designated shape element, and the end points of the designated shape element are set as one end point. The end point coordinates of other shape elements are changed to update the memory contents of the edit element table and various buffer memories, and the sweep shape is displayed together with the original shape (step 404). The parameter data is also updated according to this coordinate change.

For example, as shown in FIG. 18C1, when one end point P7 is designated as the reference point and the point P10 is designated as the sweep destination position, the point P1 is designated.
The coordinate of 0 is set as the end point coordinate of the shape element E91 on the side other than the reference point P7, and the parameter data is updated accordingly. For example, the shape element E91 is given new parameter data different from the shape element to which the same parameter data has been given until now. Further, for example, as shown in FIG. 18C2, when the center point P9 is designated as the reference point and the points P11 and P12 are designated as the positions of the sweep destination, the coordinates of the points P11 and P12 are changed to the shape thereof. The end point coordinates of the element are set and the parameter data is updated accordingly.

While the shape before and after the sweep and the sweep direction reference line are displayed, it is next asked whether or not there is another shape element to be subjected to the individual sweep processing (step 405). If so, step 4 above
Return to 00, and if not, ask whether to store a new sweep shape in the graphic storage device 14 (step 4).
06). When a negative result is obtained, the series of processing is immediately terminated, while when a positive result is obtained, the graphic storage device 14
The storing operation for is executed (step 407). Even in this case, the storing operation for the shape element table is executed without changing the surface definition table and the block definition table. That is, the sweep processing only changes the end point coordinates of the shape element, and does not change the type of shape element forming a surface or the type of surface forming a block. Therefore, the memory area for storing these shape elements is not a new memory area but an area for storing data until now.

In this way, with a small number of specifying operations,
The length of an individual shape element can be changed by sweeping, and the end point coordinates of the shape element intersecting with this shape element can be changed.

FIG. 18D shows the shape F8A after the two shape elements E91 and E92 are individually swept by the same amount in the same direction.

In this way, even in the case of individual sweep,
The display of the sweep direction reference axis allows the operator to easily specify the sweep position.

(C) Effects of the Embodiment According to the above-mentioned embodiment, the following effects can be obtained.

In the moving process and the moving copying process, the moving reference axis for instructing the moving direction is displayed so that the operator can instruct the moving destination. Therefore, it becomes easier to instruct the moving destination as compared with the conventional method. It is possible to reduce mistakes in designation of the destination and prevent the operation from being redone. As a result, the movement processing time also becomes shorter.

Further, in the rotation processing and the rotation copying processing, the rotation reference axis which is the rotation center axis is displayed, so that the operator can visually recognize the rotation center and confirm the rotation direction, and the wrong rotation processing can be performed. It is possible to significantly reduce the amount of execution. as a result,
The rotation processing time also becomes shorter.

Further, in the sweep process, the sweep direction reference axis is displayed so that the operator can instruct the sweep position. Therefore, the sweep position can be easily designated as compared with the conventional method, and the sweep position can be specified incorrectly. It is possible to reduce the number and prevent the operation from being redone. As a result, the sweep processing time also becomes shorter.

According to the above-described embodiment, except for the individual sweep processing, the edit processing for a plurality of shape elements is executed by designating one shape element without specifying shape elements one by one. The number of times is less than before,
Operation mistakes are reduced and operability and editing time can be improved. If the display effects of the movement reference axis, the rotation reference axis, and the sweep direction reference axis described above are also combined, the operability and the editing time are very good.

(D) Other Embodiments Regarding the movement processing and rotation processing in the above-mentioned embodiments, in the case of the editing processing of the entire shape by the designation of one shape element executed by the parametric editing processing unit 35, the movement reference Although the axis and the rotation reference axis are displayed, the movement reference axis and the rotation reference axis may be displayed during the editing for each shape element executed by the shape element edit processing unit 34.

FIG. 19 shows a state in which the movement reference axis is displayed in the case of such movement for each shape element.

In the above-described embodiment, various coordinate designations are made by the display coordinate system or the coordinate system of the shape auxiliary data. However, instead of or in addition to this, designation is made by the definition coordinate system of the shape data. You may allow it.

In the description of the above embodiment, the flow of the basic editing process has been described. However, at each processing stage, cancellation of the designation, enlargement / reduction of the display screen, movement of the display position of the display screen, display of the display screen, etc. The screen can be rotated and information (element identification number, etc.) added to each shape element can be referred to.

Further, in the above-mentioned embodiment, the initial value (default value) is set for the movement reference axis and the rotation reference axis.
However, the initial setting value may be displayed even when the shape element is designated, the movement reference point or the rotation reference point is designated, and the destination or the rotation angle is designated.

Further, in the above embodiment, the shape data is loaded from the graphic storage device 14 into the graphic processing device 13 and edited, but the graphic storage device 14 is accessed each time. Is also good.

Further, the parametric edit processing unit 35 is
It may be provided as an external device of the graphic processing device 13.

Furthermore, in the parametric sweep process, the specification of a plurality of shape elements relating to the same parameter whose length is changed is performed by specifying the surface. However, by specifying a shape element, the same shape element is specified. It is also possible to specify a plurality of shape elements having the parameter of.

[0125]

As described above, according to the present invention of claim 1, in the moving process and the moving copy process, the movement reference axis for instructing the movement direction is displayed to allow the operator to instruct the movement destination. Therefore, it becomes easier to instruct the destination of movement as compared with the related art, and mistakes in designation of the destination of movement are reduced, so that operability and movement processing time can be improved.

According to the second aspect of the present invention, the rotation reference axis, which is the rotation center axis, is displayed in the rotation processing and the rotation copy processing, so that the operator can visually recognize the rotation center and confirm the rotation direction. Therefore, it is possible to significantly reduce the execution of erroneous rotation processing, and it is possible to improve operability and rotation processing time.

Furthermore, according to the present invention of claim 3, by designating one shape element, the editing process is performed on the entire shape element including the shape element without designating the shape element one by one. Therefore, the number of operations is reduced as compared with the conventional one, and the number of operation errors is reduced, so that the operability and the editing processing time can be improved.

Further, according to the present invention of claim 4, in the sweep process of extending or contracting at least one or more shape elements, the sweep direction reference axis extending in the sweep direction passing through the sweep reference point is displayed and the sweep is performed. Since the tip is designated, the designation of the sweep destination is easier than in the conventional case, the mistake in designation of the sweep destination is reduced, and the operability and the movement processing time can be improved.

Further, according to the present invention of claim 5, the sweep processing is executed for a plurality of shape elements related to the sweep processing by designating one shape element without designating each shape element one by one. In addition, the number of operations is reduced as compared with the conventional one, and the number of operation mistakes is reduced, so that the operability and the editing processing time can be improved.

[Brief description of drawings]

FIG. 1 is a flowchart showing a moving process according to an embodiment.

FIG. 2 is a chart showing an example of data definition of a shape element.

FIG. 3 is a block diagram showing a CAD system configuration according to an embodiment.

FIG. 4 is an explanatory diagram of element relationship data according to the embodiment.

FIG. 5 is an explanatory diagram (1) from the display image of the movement process of the embodiment.

FIG. 6 is an explanatory diagram (part 2) from the display image of the movement process of the embodiment.

FIG. 7 is an explanatory diagram (part 3) from the display image of the movement process of the embodiment.

FIG. 8 is an explanatory view (No. 4) from the display image of the movement process of the embodiment.

FIG. 9 is an explanatory diagram of a difference between the moving process and the moving copy process according to the embodiment.

FIG. 10 is a flowchart showing a rotation process of the embodiment.

FIG. 11 is an explanatory diagram (No. 1) from the display image of the rotation processing of the embodiment.

FIG. 12 is an explanatory diagram (part 2) from the display image of the rotation processing of the embodiment.

FIG. 13 is an explanatory diagram of a shape change due to the sweep processing according to the embodiment.

FIG. 14 is a flowchart of a parametric sweep process according to the embodiment.

FIG. 15 is an explanatory diagram of a change in display image in the parametric sweep process of the embodiment.

FIG. 16 is an explanatory diagram showing an actual modification example of the parametric sweep of the embodiment.

FIG. 17 is a flowchart of an individual sweep process according to the embodiment.

FIG. 18 is an explanatory diagram of display image changes in the individual sweep processing according to the embodiment.

FIG. 19 is an explanatory diagram of movement processing in units of shape elements according to the above-described embodiment.

[Explanation of symbols]

10 ... CAD system, 11 ... Input device, 12 ... Graphic display device, 13 ... Graphic processing device, 14 ... Graphic storage device, 3
DESCRIPTION OF SYMBOLS 1 ... Input acquisition part, 32 ... Display control part, 33 ... Storage control part, 34 ... Shape element edit processing part, 35 ... Parametric shape edit processing part, 41 ... Shape data main body storage part, 42 ...
Shape auxiliary data (parametric data) storage.

Claims (5)

[Claims] 1. In a shape editing method of a CAD system for moving or moving copying at least one or more shape elements, after a movement reference point of a movement source is designated, a movement reference extending in a movement direction passing through the movement reference point. A CAD that prompts the user to specify an axis and displays the specified movement reference axis, and takes in the movement destination information of the movement reference point specified.
System shape editing method. 2. In a shape editing method of a CAD system for rotating or rotationally copying at least one or more shape elements, after the shape element information of the object of rotation is fetched, the rotation reference axis which is the center of rotation is prompted and designated. A shape editing method for a CAD system, characterized in that the rotation amount information is taken in while the displayed rotation reference axis is displayed. 3. A shape and each shape element forming the shape are associated with each other to store data, and when one shape element is designated, all shape elements including the shape element are stored. 3. The CA according to claim 1 or 2, characterized in that the editing process is executed with the display of the movement reference axis or the rotation reference axis.
Shape editing method of D system. 4. In a shape editing method of a CAD system for performing a sweep for extending or contracting at least one or more shape elements, after a reference point for sweep processing is designated, it extends in a sweep direction passing through this sweep reference point. A shape editing method for a CAD system, characterized in that the sweep direction reference axis is determined, and the position information of the sweep destination is taken in while the determined sweep direction reference axis is displayed. 5. A shape and each shape element forming the shape are associated with each other to store data, and when one shape element is designated, a plurality of shape elements related to the shape element are swept. The shape editing method of a CAD system according to claim 4, wherein an editing process involving displaying of the sweep direction reference axis is executed as a processing target.