JPS6386080A - Cad system - Google Patents

Abstract

PURPOSE:To easily operate an expansion and a reduction when plural projection drawings are displayed by displaying, in parallel, respective graphic images in which an area is set and the expanded or reduced graphic image in respective areas. CONSTITUTION:The image of a projection drawing to be displayed from a total graphic image storing memory 5 is extracted and stored into a display graphic storing memory 3. When the area to be reduced by an input device 2 is designated to either of the extracted graphic images, a coordinate converting module 6 sets a corresponding area even to other extracted graphic image, outputs it in parallel to an output device 1, further, expanding or reducing-converts the graphic image in the area, outputs simultaneously and outputs in parallel, to the output device 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a CAD system used when designing a machine using a computer.

(Conventional Art) Generally, when editing a three-dimensional figure using a CAD system for mechanical design, a plurality of projection views are often displayed in parallel on a display device.

By the way, if you want to partially enlarge or reduce a projection drawing while displaying multiple projection drawings and performing design work, it is necessary to specify the area using a cursor, etc. In this CAD system, it is necessary to specify an area for each three-dimensional projection, which makes the operation very cumbersome, and it is difficult to match the specified position of the enlarged or reduced part of each projection. There was a problem.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned circumstances, and is directed to the enlargement or reduction operation when a plurality of projection views are displayed in a CAD system for machine M2 #11. The object of the present invention is to provide a CAD system that is extremely simple and ensures that designated positions of each projection view match.

[Structure of the Invention] (Means for Solving the Problems) The CAD system of the present invention includes a first figure image storage means in which figure images of a plurality of projection views of a three-dimensional figure are stored; a second figure image storage means in which a figure image of a projection view extracted from the projection drawing is stored; Coordinate conversion means for converting the coordinates of a region set in a graphic image and enlarging or contracting a graphic image within the region set in each graphic image and outputting the same at the same time; and each graphic image in which the region is set and the enlarged or a display means for displaying graphic images in each reduced area in parallel.

(Function) In the CAD system of the present invention, a graphic image of a projection view to be displayed is extracted from the first graphic image storage means and stored in the second graphic image storage means, and one of the extracted graphic images is extracted from the first graphic image storage means and stored in the second graphic image storage means. When an area to be enlarged or reduced is specified, the coordinate conversion means sets corresponding areas for other extracted figure images and displays them in parallel on the display means, and roughly enlarges the figure images within the area. Alternatively, the images are reduced and converted and output simultaneously, and displayed on a display means in parallel.

(Example) Hereinafter, details of an example of the system of the present invention will be described based on the drawings.

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

In the same figure, 1 is a C that displays each projection view of a three-dimensional figure.
An output device such as an RT display, 2 an input device such as a keyboard, 3 a display figure image storage memory in which a figure image of each projection view being displayed at a certain point in time is stored in the output device 1, and 4 a three-dimensional figure. 5 is an all-figure image storage memory in which figure images of all projected figures of a three-dimensional figure are stored; 6 is a figure in the display figure image storage memory; A coordinate conversion module 7 that recognizes coordinate information of an image and performs necessary coordinate conversion is a control device that controls each of these parts.

FIG. 2 is a flowchart showing the operation of the system of this embodiment.

In the system of this embodiment, first, when a command to display a plurality of projection views of a certain three-dimensional figure is input from the input device 2, in step A), the multiple projection view creation module 4 is required from the all-figure image storage memory 5. When the graphic image of each projection diagram is read (step B) and the graphic image of each projection diagram is written into the display graphic image storage memory 3 (step C), the output device 1 displays each projection diagram in parallel (step D).

Here, an example of the display on the output device 1 is shown in FIG.

In the figure, 101 is a front view of a block body having a cross-sectional shape, 102 is a right side view of the same block body, 103 is a bottom view of the same, and 104 is a perspective view of the same. As can be seen from this figure, in the output device 4, one screen is logically divided into a plurality of parts, and a plurality of projection views are displayed in parallel so that they can be compared.

If it is necessary to partially enlarge or reduce the projection view, the projection view that is the center of the work is specified and the depth is specified (step E).

Below, the projection view that is the center of the work is the front view 101, the depth is 105 in the right side view 102, and 1 in the bottom view 103.
The case where the work is performed by specifying the position indicated by 06 will be explained.

First, in the front view 101, when a certain portion is to be enlarged or reduced, the input device 2 is used to designate the rectangular area 107 in which the cylinder is to be enlarged or reduced, and its diagonal points are specified using a cursor or the like (step F).

Then, the coordinate conversion module 6 calculates a rectangular area from the coordinate values (X+, Y+) and (X2, Y2) of the specified diagonal points, but converts the absolute value lX2-X11 and the absolute value so that the rectangular area becomes a square area. Find a rectangular area whose side is the larger value IY2-Y+l.

At this time, correct the rectangular area horizontally or vertically so that the center of the rectangular area does not shift, and (X1', Y+') and (X
2', Y2').

Next, the coordinate conversion module 6 determines designated areas corresponding to the rectangular area in the right side view, bottom view, and perspective view.

Here, the right side view 102 has a YZ plane, and since Y has already been determined, only the value of Z is determined. The value of Z is determined from the currently specified depth 105, since the projection view that is the center of the work indicates depth.

When the depth value is 71, the range of 7 in the right side view is from Z+-lY+'-Y2'l/2 to Z++lY+'-Y2'1/2. That is, (X+', Y+', Z+-IYI'-Y2'
1/2) and (X2', Y2', Z+ +lY+' - Y2'
Define a cube with one side length IYI' - Y2' with 1 and vertices.

This means that a cubic area has been set in three-dimensional space. Once this cubic area is determined, the area to be enlarged or reduced is displayed in each projection view as shown in FIG. 4 (step H).

Then, when a screen redisplay command is inputted from the input device 2, a display as shown in FIG. 5 is performed in the case of enlargement, and operations such as defining straight lines become possible.

Note that the area 1e4 can be corrected by inputting an area designation command without inputting a redisplay command in the display state as shown in FIG. 4.

Also, when enlarging or reducing each projection individually,
It is sufficient to perform a predetermined switch operation on the input device 2.

Thus, in the system of this embodiment, if a rectangular area indicating the range of enlargement or reduction is specified for any one of the projection views when multiple projection views are displayed in parallel, it will also be applied to the other projection views. Since the area is automatically specified and all projected views are enlarged or reduced at the same time, there is no need to specify the area for each projected view.

Furthermore, since the enlarged or reduced portions of all projected views are automatically determined by coordinate transformation from the projected view that is the focus of the work, accurate position specification is possible.

[Effects of the Invention] As explained above, in the CAD system of the present invention, when a graphic image of a projection view to be avoided is extracted and a region to be enlarged or reduced is specified in one of the extracted graphic images, The coordinate conversion means sets a corresponding area for other extracted figure images and displays them in parallel on the display means, and further enlarges or reduces the figure images in the area and outputs them simultaneously, and displays them in parallel on the display means. Therefore, in a CAD system for mechanical design, when a plurality of projection views are displayed, enlargement or reduction operations are extremely easy, and the designated positions of each projection view are reliably matched.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a system according to an embodiment of the present invention, FIG. 2 is a flowchart showing the operation of the system, and FIGS. 3 to 5 are diagrams showing display states on the output device of the system. be. 1... Output device 2... Input device 3... Display figure image storage memory 4.
...Multiple projection drawing creation module 5...
...All figure image storage memory 6...
・・Coordinate transformation module 7 ・・・・・Control device

Claims (1)

[Claims] (1) A first figure image storage means in which figure images of a plurality of projection views of a three-dimensional figure are stored, and a second figure image storage unit in which figure images of projection views extracted from the figure images are stored. means, coordinate transformation of the area set in the other graphic image corresponding to the area set to instruct the enlargement or reduction range in one of the extracted graphic images, and the area set in each graphic image. Coordinate conversion means for enlarging or reducing a graphic image within a region and outputting the same at the same time; and display means for displaying in parallel each graphic image in which the region is set and the graphic image in each enlarged or reduced region. A CAD system characterized by being equipped with.