JP3156334B2 - Graphic generation 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 generating method and apparatus suitable for use in, for example, a CAD system.

[0002]

2. Description of the Related Art In a CAD system, various symbol figures are registered in advance, and these symbol figures can be read out as necessary and displayed on a screen easily. If many symbol figures are registered in advance, it is not necessary to draw the figures from the beginning, and it is possible to quickly draw a desired figure.

[0003]

By the way, the conventional CA
In the D system, for example, when a figure of an asymmetric object as shown in FIG. 5 is registered in advance as a symbol figure,
As shown in FIG. 6, figures from six directions are drawn, and these six figures are registered. As a result, the number of symbol figures increases, and not only a large storage capacity is required, but also it takes time to register the symbol figures.

[0004] The present invention has been made in view of such a situation, and aims to reduce the number of symbol figures, reduce the recording capacity, and more quickly register the symbol figures.

[0005]

According to the graphic generating method of the present invention, whether or not to perform mirror processing on a graphic registered in advance is specified, for example, in step S1 on a program.
When performing the mirror processing, the line type of the line forming the graphic is specified in step S3, and the mirror-processed graphic corresponding to the specified line type is generated in steps S4 and S5. When the line type is registered in advance together with the graphic, the designation of the line type can be performed based on the registered line type.

The figure generating apparatus of the present invention has a registration means for registering a figure, for example, a registration section 24, and a mirror processing designating section for designating whether or not to mirror the figure registered in the registration section 24 in advance. A mirror processing designating unit 23 and a line type designating unit 22 for designating a line type of a line constituting the figure
And a mirror processing unit comprising a mirror processing unit 21 for performing mirror processing on the figure in accordance with the line type specified by the line type specification unit 22.

When a line type is registered together with a graphic in the registration unit 24, the line type can be specified in accordance with the line type registered in the registration unit 24.

[0008]

In the graphic generating method having the above-described configuration, if it is determined in step S1 that the graphic needs to be mirrored, a line type is designated (determined) in step S3. If the line type is A
Is designated, the figure is mirror-processed in step S4 and then displayed as it is. For example, when the line type is designated as B, the figure is displayed after being mirrored in step S5 and further inverting the line (the solid line is changed to a dotted line and the dotted line is changed to a solid line).

Accordingly, the number of symbol figures to be registered is small, and quick registration is possible.

In the graphic generator having the above-described configuration, the figure read out from the registration section 24 is changed to the line type specification section 22 when the mirror processing specification section 23 determines that the mirror processing is necessary. Designated (determined). If the line type is A
Is designated, the figure is mirror-processed by the mirror processing unit 21 and then displayed as it is. For example, when the line type is designated as B, the figure is displayed after being mirror-processed by the mirror processing unit 21 and further inverting the line (the solid line is changed to a dotted line and the dotted line is changed to a solid line). You. Therefore, the number of symbol figures to be registered is small, and the capacity of the registration unit 24 for registration is small.

[0011]

FIG. 1 is a block diagram showing the configuration of an embodiment of a graphic generator according to the present invention. The registration unit 24 stores graphic data. The mirror processing unit 21 reads the graphic data registered in the registration unit 24, performs mirror processing as necessary, and outputs and displays the data on the display unit 25. The line type designation unit 22 outputs the line type designation data of A or B to the mirror processing unit 21. The line type is specified by the user or automatically specified in accordance with the line type data stored in the registration unit 24 in advance. The mirror processing designating section 23 issues a command as to whether or not to perform mirror processing to the mirror processing section 2.
Output to 1. Also in this case, it is generated by the user or automatically generated in accordance with the registration data of the registration unit 24.

Next, the operation will be described. The graphic data read from the registration unit 24 is input to the mirror processing unit 21. When the mirror processing is not instructed by the mirror processing designating section 23, the mirror processing section 21 outputs this graphic data to the display section 25 for display without performing the mirror processing. Thus, the figure registered in the registration unit 24 is displayed as it is.

When a mirror process is instructed by the mirror process designating unit 23, the mirror process unit 21 performs a mirror process on the graphic data read out from the registration unit 24 and displays the data (as if it were a mirror image). Output and display on the unit 25. At this time, the mirror processing unit 21 displays the line for which the line type A is designated by the line type designation unit 22 as it is (the solid line remains as a solid line, and the dotted line remains as a dotted line). On the other hand, the line for which the line type B is designated is displayed in reverse (the solid line is a dotted line and the dotted line is a solid line).

FIG. 2 is a block diagram showing the configuration of an embodiment of a construction drawing CAD system to which the graphic generating method and apparatus of the present invention are applied. The CPU 1 has a built-in main storage device, an arithmetic device, a control device, and the like.
The drawing processing is executed according to the program stored in M2. The RAM 3 forms a work area for graphic processing. The hard disk 5 stores various graphic data such as architectural drawings. The keyboard 6 or the tablet 7 with a four-button cursor is used to input various commands and various commands necessary for drawing processing. The display 8 displays the created figure, and the plotter 9
Plot out the created figure on paper. The interface 4 connects these hard disk 5, keyboard 6, tablet 7, display 8, and plotter 9 to C
Connected to PU1.

A number of symbol figures and types of lines constituting the figures are registered in the hard disk 5 in advance. First, the operation of drawing this symbol figure and registering it on the hard disk 5 will be described. When a predetermined figure is drawn by operating the keyboard 6 or the tablet 7, the CPU 1 causes the display 8 to display the figure. At this time, the user can also operate the keyboard 6 or the tablet 7 to designate a line type for each line constituting the figure. When drawing of the figure and designation of the line type of each line are completed, the keyboard 6 or the tablet 7
Is operated, a figure and a line type are stored in the hard disk 5.

For example, when registering the symbol figure of the object shown in FIG. 5, the drawing is performed as shown in FIG. As shown in the front and rear views shown in FIG.
The outer contour of the front view corresponds to the outer contour of the rear view when the mirror processing is performed. On the other hand, when a line displayed as a circle inside the outline of the front view is mirrored in the rear view, a line to be displayed in reverse (a solid line is a dotted line, and a dotted line is a solid line, respectively). Line to be changed). In such a case, when the user registers the front view,
The outer line is registered as a mode A line type, and the inner circle line is registered as a mode B line type.

When the object shown in FIG. 5 is registered as a symbol figure, only three views, for example, a front view, a top view, and a left side view are registered. In other words, a bottom view that can be displayed by mirroring the top view, a right side view that can be displayed by mirroring the left side view, and a rear view that can be displayed by mirroring the front view The figure is not registered.

Next, a description will be given of an operation of reading the symbol graphic registered on the hard disk 5 and drawing (displaying) it on the display 8, that is, an embodiment of the graphic generating method of the present invention. When a command for drawing a registered figure is given, the CPU 1 executes the processing shown in the flowchart of FIG. That is, the CPU 1 firstly executes the keyboard 6 or the tablet 7 in step S1.
Is read from the hard disk 5 and temporarily stored in the RAM 3. And CPU
1 judges in step S1 whether or not the read figure needs to be mirror-processed. Whether or not to perform the mirror process is automatically specified by the CPU 1.

For example, as described above, for the symbol figure corresponding to the object in FIG. 5, only the front view, the top view, and the left side view are registered. Therefore, in the case of displaying any one of these three views, mirror processing is not required. On the other hand, when the display of the bottom view, the back view, or the right side view is designated, the CPU 1 automatically mirrors the front view, the top view, or the left side view even if no special command is input from the user. Processing will result in the display of a back view, bottom view or right side view.

When the mirror process is performed, the process proceeds from step S1 to step S3, and the line type mode of each line constituting the figure is determined. If the line type mode is A, the process proceeds to step S4, and the line is mirror-processed and then displayed as it is (as a solid line for a solid line and as a dotted line for a dotted line). On the other hand, if the line type mode is B, the process proceeds to step S5, the line is mirror-processed, and then inverted (displayed as a dotted line in the case of a solid line and as a solid line in the case of a dotted line). Thus, for example, when the command to draw the rear view shown in FIG. 6 is issued, the front view is read, and each line of the front view is mirror-processed and displayed on the display 8. Also, at this time, the contour line of the line type A is left as a solid line, but the center circle of the line type B is displayed as a dotted line.

Next, in step S6, it is determined whether or not the drawing of all the elements (all the lines) constituting the figure has been completed. If all the lines have not been drawn, the process returns to step S3, and the subsequent processes are similarly repeated for other lines. When all the lines are displayed, the process ends.

If it is determined in step S1 that it is not necessary to perform the mirror process, the process proceeds to step S2, where the graphic for which the drawing is instructed is drawn on the display 8 as it is, and the process ends. For example, the front view, top view, or left side view in FIG.

In the above description, the designation of the necessity of the mirror processing in step S1 and the designation of the line type mode in step S3 are automatically set in accordance with the registration in the hard disk 5.
Alternatively, it can be manually designated in response to the operation of the tablet 7.

The case where the present invention is applied to a CAD system has been described above. However, the present invention can be applied to other than the CAD system.

[0025]

As described above, according to the graphic generation method and apparatus of the present invention, when mirror processing is performed, lines are displayed in accordance with the line types. Can be executed quickly. Further, the capacity of the storage means can be small, and a low-cost device can be realized. Further, when the line type is registered in advance together with the graphic, quick display is possible.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing a configuration of an embodiment of a CAD system to which the graphic generator of the present invention is applied.

FIG. 3 is a flowchart illustrating the operation of an embodiment of the graphic generation method of the present invention.

FIG. 4 is a diagram for explaining designation of a line type in the flowchart of FIG. 3;

FIG. 5 is a perspective view showing the appearance of an object to be registered.

FIG. 6 is a six-sided view of the object shown in FIG. 5;

[Explanation of symbols]

 1 CPU 2 ROM 3 RAM 4 Interface 5 Hard Disk 6 Keyboard 7 4 Tablet with Button Cursor 8 Display 9 Plotter

Claims (4)

(57) [Claims] 1. A graphic generating apparatus for generating a graphic.
In the figure generation method, it is designated whether or not to perform mirror processing on a figure registered in advance, and when performing mirror processing, a line type of a line constituting the figure is designated, and the line type corresponding to the designated line type is designated. And generating a mirror-processed figure. 2. The method according to claim 1, wherein the line type is registered in advance together with the graphic, and the designation of the line type is performed based on the registered line type. 3. Registering means for registering a figure, mirror processing specifying means for specifying whether or not to mirror the figure registered in advance in the registering means, and specifying a line type of a line constituting the figure. A graphic generating apparatus comprising: a line type designating unit for designating; and a mirror processing unit for performing mirror processing on the graphic in accordance with the line type designated by the line type designating unit. 4. The registration unit registers the line type together with the graphic, and the line type designation unit designates the line type corresponding to the line type registered in the registration unit. The figure generating apparatus according to claim 3, wherein