JPH0467230B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for inputting line segments wired in parallel in a CAD system.

(Prior Art) FIG. 7 is a block diagram showing the configuration of a CAD system. In the figure, 71 is a storage device that stores graphic data, 72 is a central processing unit that processes the graphic data stored in the storage device 71, and 73 is an input/output device that performs design work while interacting with the central processing unit 72. 74 is a keyboard for inputting design information, 75 is a tablet for inputting design information in two dimensions, and 76 is a graphic display for displaying graphic data input from the central processing unit 72 as a drawing.

In the CAD system having the above configuration, there have conventionally been two methods for inputting line segments that are wired in parallel.

First, the first method is to connect line segments 85 and 8 connecting circuit elements 81 and 82 in a circuit as shown in FIG.
When inputting 6 and 87, the process is as follows.
83, 84 to indicate the starting points of line segments 85, 87
The two points are input, and the intersection of the line segment represented by these two points and the terminal of the circuit element 81 is set as the starting point. Then, one point 88 is inputted with the intersection of the terminals of the circuit element 82 at the end point of the line segment 85 as one end point. Therefore, line segments 86 and 87 are generated parallel to line segment 85.

The second method is to input line segments 97 and 98 connecting terminals (not shown), which are located at different levels, as shown in FIG. 9. First, line segment 97 is 91, 92, 93, 9
Specify and input the four points in step 4. Next, an arbitrary point 95 in the line segment 97 is designated, and a point 96 is also input. Then, line segment 97 is copied so that point 95 overlaps the position of point 96, and line segment 98 is input.

(Problems to be Solved by the Invention) However, in any of the above conventional methods, the lengths 101 and 102 of the line segments 105 and 106 differ, for example, as shown in FIG. It is not possible to input the wiring of a circuit with bends in which 103 and 104 are different, and it is necessary to input each line segment, which is technically unsatisfactory.

The present invention is intended to solve these problems, and provides a method for inputting parallel wiring in a CAD system that can easily input any parallel wiring and improves the efficiency and labor saving of design work. The purpose is to provide.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention is a wiring input method in a CAD system for inputting wiring between circuit elements, and is characterized by a method comprising the following steps.

As a first step, line segments intersecting terminals between circuit elements are input. Next, as a second step, the intersecting point is set as the starting point of the line segment to be input, and a virtual line segment is generated from this starting point in a direction in which the end point of the line segment can exist. Then, as a third step, a line segment that intersects the virtual line segment is input. As a fourth step, the intersection point is set as the end point of the line segment to be input, the line segment consisting of the start point and this end point is set as the line segment to be input, and this end point is set as the end point of the line segment to be input. Let it be the starting point of the power line segment.

(Function) According to the present invention comprising the above-described procedure, a line segment is input using an input means such as a tablet so as to intersect with a wiring or a terminal of a circuit element. next,
Set this intersection point as the starting point of the line segment to be input,
A virtual line segment that will be erased later is drawn from this starting point in a direction in which the end point of the line segment can exist. A line segment is input using the input means so as to intersect this virtual line segment. Next, this intersection point is set as the end point of the line segment to be input, and the line segment connecting this end point and the start point is set as the line segment to be input. This end point is also the start point of the next new line segment to be input. Wiring between circuit elements is performed by repeating such a procedure.

Therefore, the present invention can solve the above-mentioned problems, and can provide a wiring input method in a CAD system that can improve efficiency and save labor in design work using the CAD system.

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

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, 10 is a graphic display that displays figure data as a drawing, 11 is a tablet for inputting point data, 12 is a line segment input processing unit that creates a line segment from two point data input on the tablet 11, Reference numeral 13 denotes an intersection calculation processing unit that calculates intersections between line segments, line segments and points, and directions of line segments that can occur from these intersections (hereinafter referred to as intersection information); 14, calculation is performed by the intersection calculation processing unit 13; an intersection information storage unit 15 that stores intersection information obtained by
16 is a virtual line segment storage unit that stores the virtual line segment created by the virtual line segment generation processing unit 15; 17 is virtual line segment and intersection information. 18 is a line segment storage unit that stores the line segments created by the line segment creation processing unit 17; 19 is a circuit element/terminal that stores circuit elements and terminals as graphic data; The storage unit 20 is a display processing unit that controls the display of line segments and circuit elements, and the display and erasure of virtual line segments.

The operation of this embodiment having the above configuration will be explained below based on the flowchart shown in FIG. Further, FIGS. 3 to 6 are diagrams showing the progress of a specific example processed by this embodiment,
A description will be given including the results processed by the method of this embodiment.

First, the state of the circuit shown in FIG. 3 is that the circuit elements S ₁ ,
Terminals T ₁ to _{T 6} of circuit element S ₂ have already been connected by line segments l ₁ , l ₂ , and l ₃ as shown in the figure, and from now on, terminals T ₇ to T of circuit element S ₃ will be connected by the method of this embodiment. ₉ and line segments l ₁ , l ₂ , and l ₃ are connected. Progress 1 shown in Figure 4 is step 111.
~118, and in step 111 the line segments l ₁ , l ₂ ,
Line segment _g1 is input via the tablet 11 and line segment input processing section 12 shown in FIG. 1 so that the intersection with _l3 becomes the end point of a new line segment to be generated. step 112
Now, an attempt is made to find the intersections of the circuit elements S ₁ , S ₂ , and S ₃ with the terminals T ₁ to _{T 9} , but there are no intersections here. Next _, in step ₁₁₃ , _the directions _{90 and 270} of _FIG . Intersection calculation processing unit 1
Find it by 3. In step 114, the intersection point K ₁ ,
Virtual line segments V ₁ to _{V 6} are generated from K ₂ and K ₃ in each direction 90 and 270 by the virtual line segment generation processing unit 15 shown in FIG. Virtual line segments V ₁ to ₆ are displayed on the display 10. In step 116, tablet 1 in Fig.
1 and the line segment g ₂ is input via the line segment input processing section 12 . In step 118, virtual line segments V ₁ to V ₆ and line segment g ₂
The intersection points K ₄ , K ₅ , and K ₆ are determined by the intersection calculation processing unit 13 shown in FIG.

Process 2 shown in FIG. 5 corresponds to steps 119-120 and steps 114 and 118. Step 119
Then, from the virtual line segments V ₁ to V ₆ and the intersections K ₄ , K ₅ , and K ₆ , the line segment
l ₄ , l ₅ , l ₆ are created by the line segment creation processing unit 17 in FIG. 1 and stored in the line segment storage unit ₁₈ in _FIG . Clear the display and return to step 114. In step 114, the intersections K ₄ , K ₅ ,
The virtual line _segment generation processing unit ₁₅ in _FIG .
In step 115, virtual line segments _V7 to _V15 are displayed on the graphic display 10 of FIG. At step 116, the line segment _g3 is input via the tablet 11 and line segment input processing section 12 shown in FIG. In step 118, the intersection points K ₇ , K ₈ , and K ₉ between the virtual line segments V ₇ to V ₁₅ and the line segment g ₃ are determined by the intersection calculation processing unit 13 shown in FIG.

Figure 6 shows the completed state, with the steps
It corresponds from 119 to the end. In step 119, line segments are drawn from the intersections of virtual line segments V ₇ to V ₁₅ and points K ₇ , K ₈ , and K ₉ .
l ₇ , l ₈ , l ₉ are created by the line segment creation processing unit 17 shown in FIG. 1 and stored in the line segment storage unit ₁₈ shown in _FIG . Clear the display and return to step 114. In step 114, no more virtual line segments can be generated in this example, and the process ends in step 117.

(Effects of the Invention) As explained above, according to the present invention, the starting point of a line segment is set as a point on the line segment or a connection terminal, and by inputting the line segment instead of the bending point and the end point of the line segment. , it is now possible to input wiring from the middle of a line segment, change parallel wiring with bends, and change the wiring spacing.
It is possible to provide a wiring input method in a CAD system that can improve efficiency and save labor in design work using a CAD system.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIG. 2 is a flowchart showing the operation of this embodiment.
Figures 3 to 6 are diagrams showing the progress of a specific example processed by this embodiment, Figure 7 is a block diagram showing the configuration of the CAD system, and Figure 8 is a diagram showing the conventional first method. 9 are diagrams showing the second conventional method, and FIG. 10 is a diagram showing an example of wiring that cannot be realized by any of the conventional methods. 10...Graphic display, 11...
Tablet, 12...Line segment input processing section, 13...
Intersection point calculation processing section, 14...Intersection point information storage section, 15
...Virtual line segment generation processing unit, 16...Virtual line segment storage unit, 17...Line segment creation processing unit, 18...Line segment storage unit, 19...Circuit element/terminal storage unit, 20...Display processing Department.

Claims (1)

[Claims] 1. In a wiring input method in a CAD system for inputting wiring between circuit elements, inputting a line segment that intersects with the wiring or the terminal of the circuit element, and determining the line segment where the intersecting point is to be input. Generate a virtual line segment from the starting point in a direction where the end point of the line segment can exist, input a line segment that intersects the virtual line segment, and input the intersecting point as the end of the line segment. a point, and a line segment consisting of the start point and the end point is set as a line segment to be input, and the end point is set as a start point of a new line segment to be input.
How to input wiring in the system.