JPH0760440B2 - Automatic design system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] In an automatic design system for reading out graphic data corresponding to each graphic element from a view memory and automatically drawing a drawing corresponding to the graphic element, an external connection surrounding the graphic element is provided. Corresponding to the above-mentioned dimension display object by providing a dimension display position approximate setting processing means for setting a rectangle and instructing whether to display the dimension display for the dimension display object in the graphic element above or below or to the left or right of the circumscribed rectangle. It is disclosed that the dimensional display to be performed is drawn according to the above drawing.

[Industrial application field]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic design system, and more particularly to an automatic design system adapted to automatically determine and display a dimension display position in accordance with individual graphic elements of a drawing drawn by the automatic design system.

[Conventional technology]

Conventionally, a CAD system for mechanical drawing has been known, but there is one that has a function of automatically drawing a dimension display corresponding to the dimension display object in each graphic element. Even if there is none, or even if it exists, the range of drawing in a form that satisfies the designer's intention is considered to be extremely limited. In the above case, even if the dimensions are displayed, many manual corrections are required.

[Problems to be solved by the invention]

In order to have the function of displaying the above dimensions, it is also necessary to decide the dimension display object such as which dimension is to be displayed for each graphic element,
Even when the dimension display target is determined, it is necessary to determine at which position the dimension display corresponding to the target is to be performed. When determining the position, it is necessary to consider the overall outline of each graphic element.

[Means for solving problems]

The present invention has a function of automatically determining to which position the above-mentioned dimension display should be made.

FIG. 1 is a diagram for explaining the principle of the present invention.

Reference numeral 1 in the figure is a processing target view instruction processing unit, and 1
In a view memory (not shown) that stores graphic data for one or a plurality of graphic elements, a process target view having graphic data for which drawing is desired is designated as a process target view.

For example, in trigonometry, each surface such as a front view, a plan view, and a side view is called a view. In the CAD system, since each surface (view) individually has graphic data corresponding to the view, the entire graphic data corresponding to each surface may be referred to as a "view". Graphic data corresponding to a surface is called a "view".

Reference numeral 2 denotes a dimension display target instruction processing unit, which performs a process of determining a size display target as to which size should be displayed corresponding to the shape of each graphic element. In this case, the operator may instruct which size should be displayed for a graphic element such as a trapezoid having a deformed shape by a key, a light pen, or a menu instruction, but it is complicated for the operator to instruct each time. Yes,
As for solid lines, (i) vertical line from the predetermined position to the horizontal line (vertical size), and (ii) vertical line from the predetermined position to the vertical line. Horizontal dimension (horizontal dimension), (iii) For circles (excluding arcs), the horizontal and vertical dimensions from the specified position to the center of the circle, (iv) For taps that are symbolized, specify The horizontal dimension and vertical dimension from the position to the reference point of the tap should be set in advance as what should be displayed. In addition, what is targeted for displaying the dimension is referred to as a dimension display object in the present invention.

Reference numeral 3 is a graphic element extraction processing unit that extracts the form of each graphic element, such as whether the graphic element is a circle, a tap, or other, and also extracts the graphic element for each graphic element. Make sure to determine the enclosing rectangle. In the CAD system, a "circle" has data of a center value and a radius as a circle. For example, a "tap" written in the form of a double circle is the above "circle". It is being recognized as different.

Reference numeral 4 is a grouping processing unit, which groups at least the circle and the taps symbolized. For example, for circles, circles that have the same radius and have the same X coordinate value (Xr) of the center point or the Y coordinate value (Yr) of the center point are grouped, and the X coordinate value (Xr) is arranged in ascending order. A number is added and the Y coordinate value (Y
Perform the process of assigning an order in ascending order of r). It can be considered that the same grouping is performed for taps that are symbolized.

Reference numeral 5 is a size display position approximate setting processing unit, in which the size display target in the graphic element is above the circumscribed rectangle.
An upper position or a lower position is determined depending on which side is lower, and a left position or a right position is determined depending on which side of the circumscribed rectangle is left or right.

Although not shown in FIG. 1, it may be considered that there is a drawing processing unit next to the illustrated dimension display position approximate setting processing unit.

[Action]

When the processing target view is designated in the processing 1 and then the dimension display target is designated in the processing 2, the graphic element extraction processing unit 3 extracts the graphic element from the processing target view. Then, for each figure element, a) X _min coordinate value and X _max coordinate value of the circumscribing rectangle, b) Y _min coordinate value and Y _max coordinate value of the circumscribing rectangle, c) Circle radius for circle, d) Circle For taps and taps, the coordinate value of the reference point (Xr, Y
r), e) In addition, the figure shape determined from the outline of the figure element is extracted.

Next, in the grouping processing unit 4, the taps that are figures or symbols are grouped and the order within the group is given.

Then, in the process 5 shown in FIG. 1, the dimension display position is determined corresponding to the dimension display object.

Then, drawing such as dimension display is performed based on the result.

〔Example〕

2 (A) and 2 (B) are explanatory views for explaining the dimension display mode according to the normal form, and FIGS. 3 (A) and 3 (B) are explanatory diagrams for explaining the size display mode according to the central distribution mode. .

When the origin ORG is given when the graphic element 6 as shown in FIG. 2 (A) exists, the dimension display target is determined for the line and the circle with the origin ORG as a base point, and each dimension display target is set. Is displayed.

In the case where the origin ORG is given on the center line of the graphic element such as the cylindrical graphic element 7 as shown in FIG. 3 (A), parallel lines exist at the same distance on both sides of the center line. When it is found that the shape is as shown by arrows (a) and (b) in FIG.
The dimensions are displayed in the form of central distribution.

FIG. 4 shows the structure of an essential part of an embodiment of the present invention, and the reference numerals 1 to 5 in the figure correspond to FIG.

The graphic element extraction processing unit 3 corresponds to each graphic element, for example, as in the table 8 shown in FIG. 4, the element number, the maximum / minimum value on the X coordinate, the maximum / minimum value on the Y coordinate, The radius, the coordinate value of the reference point, and the like are extracted, and the external form information of the graphic element is also extracted.

The grouping processing unit 4 includes the illustrated tables 9-1, 9-2, ...
Alternatively, like the illustrated tables 10-1, 10-2, ..., They are grouped into groups, and the graphic element numbers in the groups are described in a predetermined order.

The dimension display position rough setting processing unit 5 is shown in the table 11-
The upper and lower sides of the above-mentioned circumscribed rectangle for the respective dimension display objects (illustrated by representing the line NO) corresponding to the respective graphic elements α, β, ... -Extract whether the dimension should be displayed on the left or right.

FIG. 5 is an explanatory diagram for explaining a part of the processing in the graphic element extraction processing unit. When a graphic element 6 as shown in FIG. 2 (A) is provided, a circumscribed rectangle 12 surrounding the graphic element 6 is determined. Then, the minimum value X _min and the maximum value X _max on the X coordinate of the rectangle 12 are obtained,
Further, the minimum value Y _min and the maximum value Y _max on the Y coordinate are obtained.

FIG. 6 is an explanatory diagram for explaining a mode of processing in the group processing unit. As shown in FIG. 6 (A), a plurality of circles 13-1, 13-2, having the same radius and the same Y coordinate value of the center point,
When 13-3 is present, circles 13-1 to 13-3 are grouped and ordered based on the X coordinate value of the center point. Then, in the dimension display, it is used to display the dimension of the X coordinate value in the form of so-called additional dimension such as x ₁ , x ₂ , and x ₃ . In the case of FIG. 6 (B), a plurality of circles 14-1, 14-2, 14-3 are grouped,
In addition, they are ordered based on the Y coordinate value of the center point. And when displaying the dimensions, regarding the dimensions of the Y coordinate value,
It is used to display additional dimensions such as y ₁ , y ₂ and y ₃ . In the case of FIG. 6 (C), a plurality of circles 15-1,
15-2, 16-1, 16-2 are grouped and ordered based on the X coordinate value of the center point.

FIG. 7 is an explanatory diagram for explaining a mode of processing in the dimension display position approximate setting processing unit. The dimension corresponding to the distance between the illustrated horizontal lines 17 and 18 is represented by the line 19, and since the line 19 is a vertical line and is close to the left side of the circumscribing rectangle 12, the dimension corresponding to the distance. Is displayed on the left side of the circumscribing rectangle 12, as indicated by ∘ ₂ . Similarly, between horizontal lines 18 and 27, between horizontal lines 25 and 23, between horizontal lines 25 and 21, between vertical lines 19 and 20, between vertical lines 19 and 22 The dimension between, the dimension between the vertical lines 19 and 28, the dimension between the vertical lines 19 and 26, the dimension between the vertical lines 19 and 24, etc. are respectively shown in the upper, lower, left and right positions in the figure. It is decided to be displayed.

FIG. 8 shows the configuration of the essential part of an embodiment of the dimension drawing processing in the present invention. The process in the figure corresponds to the process of setting the origin ORG when the origin ORG has not been determined in advance. The process corresponds to the process of drawing a horizontal line and a vertical line passing on the origin ORG. The processing corresponds to the preparation processing for displaying in the form of center distribution as described with reference to FIG. When performing central distribution,
It is generated by finding symmetric parallel lines with a center line passing through the origin ORG sandwiched between them and calculating the dimensions between them. The process corresponds to the process of obtaining the dimensions from the origin ORG (from the contents of the view memory) and generating the respective line dimensions for the points that are not centrally distributed. The process corresponds to the process of generating a dimension with a follow-up dimension for circles and taps belonging to the same group. The process corresponds to the process of drawing the generated dimensions as shown in FIG. 2 (B) and FIG. 3 (B).

In addition, in each of the above processes, the coordinate value is calculated and the dimension is displayed based on the result. At this time, for example, 0.110 → 0.11 0.100 → 0.1 1.000 → 1 If it is displayed in digits and there are zeros toward the end, no display for those zeros is performed.

In the above process, it is determined based on the coordinate value whether the line is a horizontal line or a vertical line. If the horizontal line has an inclination slightly deviated from true horizontal, or if the vertical line is vertical. If the line has a slight deviation from the true vertical, for example, for the coordinates (x ₁ , y ₁ ) and the coordinates (x ₂ , y ₂ ) of the points at both ends of the line segment, | y for the horizontal line ₂ -y ₁ | When it is <0.001 regarded as horizontal lines, also with respect to the vertical line | x ₂ -x ₁ | <so as deemed is 0.001 vertical line.

Further, as shown in FIG. 2 (B) and FIG. 3 (B), when it is necessary to display a plurality of dimensions, for example, below the graphic element, each of these dimensions should be displayed at equal intervals. You may think that it is considered.

〔The invention's effect〕

As described above, according to the present invention, it becomes possible to automatically determine the dimension display position so as to properly match the outer shape of the graphic element.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of the present invention, FIGS. 2 (A) and (B) are explanatory views for explaining a size display mode according to a normal form, and FIGS. 3 (A) and (B) are sizes according to a center distribution form. FIG. 4 is an explanatory view for explaining a display mode, and FIG. 4 is a main part configuration of one embodiment of the present invention.
FIG. 5 is an explanatory view for explaining a part of the processing in the graphic element extraction processing unit, FIG. 6 is an explanatory view for explaining a mode of the processing in the group processing unit, and FIG. 7 is a processing in the dimension display position rough setting processing unit. Explanatory drawing for explaining the aspect of FIG.
The drawing shows the configuration of the essential part of one embodiment of the dimension drawing processing in the present invention. In the figure, 1 is a processing target view instruction processing unit, 2 is a dimension display target instruction processing unit, 3 is a graphic element extraction processing unit, 4 is a grouping processing unit, 5 is a dimension display position rough setting processing unit, 6, 7, 13,14,15,16 are graphic elements, x ₀ , y ₀ , x ₁ , y ₁ , ... are dimension indications, 12
Represents a circumscribed rectangle.

Claims (1)

[Claims] 1. A view memory in which graphic data corresponding to one or a plurality of graphic elements is stored as a view, and the graphic data is read from the view memory and a drawing of the corresponding graphic element is displayed. In an automatic design system that automatically draws, a processing target view instruction processing unit that specifies the processing target view as the processing target view, and a dimension display target instruction that determines the dimension display target in the graphic element corresponding to each graphic element Corresponding to the processing unit and one or more graphic elements, a circumscribing rectangle surrounding the graphic elements is set, and
A dimension display position rough setting processing unit that determines which of the upper and lower sides of the circumscribing rectangle is closer, or which of the left and right sides is closer, and designates the dimension display position corresponding to the respective dimension display target as the dimension display target position. And a drawing processing unit for sequentially drawing the dimension display by using the dimension display position designated by the dimension display position approximate setting processing unit in correspondence with the drawing read and output from the view memory. An automatic design system that has the following features.