JPH0883355A - Graphic processor - Google Patents

Abstract

PURPOSE: To exactly perform an error correction by detecting a minimum element from the elements divided by an intersected point division means and determining an error value change means defining the value calculated from the value of the detected minimum element as an allowable error value. CONSTITUTION: By starting a solid model preparation command, using an input part 1 from a CAD system and performing a rectangular designation of a trihedral drawing, the reading of the shape data, etc., of the trihedral drawing is performed by a trihedral drawing input means 4. Next, the shape data of the trihedral drawing read by an intersected point division means 5 is divided at all the intersected points. Next, the smallest element of the graphic elements for which the intersected point division is performed is detected by a minimum element detection means 6. Next, an allowable error value is changed based on the length of the minimum element detected by an error value change means 7. Based on the changed allowable error, the element is converted into a solid model by a solid model conversion means 8. Thus, an optimum error correction can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic processing device, especially Co
mputer Aided Design (hereinafter CAD
Abbreviated).

[0002]

2. Description of the Related Art In recent years, in a graphic processing apparatus, the matching or matching of graphic elements between each drawing is adjusted in a drawing drawn in a two-dimensional three-dimensional drawing to create a solid model which is a three-dimensional drawing. ing.

A conventional graphic processing apparatus will be described below with reference to the drawings. FIG. 12 is a functional block diagram of a conventional graphic processing device. Reference numeral 10 is an input unit configured by a keyboard, tablet, mouse, etc. for inputting data such as characters, numerical values, graphic elements, positions, etc. 11 is a display (hereinafter abbreviated as CRT), a liquid crystal display (hereinafter abbreviated as LCD), etc. A display unit for displaying characters, numerical values, graphic elements, positions, etc. input in the unit 10, and a storage unit 12 made up of a floppy disk, a magnetic disk, etc. for storing the shape data and the like of the drawing created on the display screen of the display unit 11. Storage,
Reference numeral 13 is a three-view drawing input means for inputting shape data and the like of the three-view drawing designated by the input unit 10, and 14 is dividing the shape data of the three-view drawing input by the three-view drawing input means 13 at all intersections. An intersection dividing means, 15 is a solid model converting means for three-dimensionally matching the distances from the view origins of the respective elements divided by the intersection dividing means 14 based on the allowable error values, and a solid model converting means, 16 is Central processing unit (hereinafter CP
A control unit for controlling the entire apparatus.

The operation of the conventional graphic processing apparatus configured as described above will be described below. FIG. 13 is a flowchart of the conventional graphic processing apparatus, and FIG.
FIG. 14 is a diagram showing an example of a three-view drawing of a conventional graphic processing device before conversion, and FIG. 14B is a diagram showing an example of a solid model after conversion of the conventional graphic processing device. First, FIG.
As shown in (a), the user sets the origin of each view on a three-dimensional drawing drawn two-dimensionally by using the input unit 10 as a preparation for creating a solid model (S1). Here, the origin of each view is the origin of the sub-coordinate axis set in each plan, and is set to be the origin of the three-dimensional solid model. Next, the three-view drawing input means 13 reads the three-view drawing with the view origin set in S1 (S).
2). Next, the shape data of the three views read by the intersection dividing means 14 in S2 is divided at the intersections of the respective line segments (S).
3). Next, in order to estimate the three-dimensional position of the element divided by the intersection in S3, the distance from each view origin drawn in the three-view drawing to each element is calculated (S4). Next, the input unit 1
The value of 0 is used to input the allowable error value used when correcting the error between elements when creating the wire frame (S5). If no input is made here, the default value stored in advance in the storage unit 12 is used. Next, a wire frame is created by three-dimensionally combining each element based on the distance from the origin of each view calculated in S4 to each element and the allowable error value input in S5 (S6). Next, the solid model converting means 15 attaches a surface to the wire frame created in S6 to create a solid model (S).
7).

[0005]

However, in the above conventional structure, when the elements are very close to each other in the three views and two or more elements are included in the allowable error, the error for the consistency is obtained. However, there is a problem in that the adjacent elements are deleted, the elements corresponding three-dimensionally become insufficient, and the three-dimensional solid model cannot be restored, resulting in lack of reliability. Further, in order to accurately correct the error, it is necessary to rely on the experience and intuition of the user, and there is a problem that the correction work takes time and the workability is poor.

The present invention solves the above-mentioned conventional problems. The allowable error value is set to be equal to or less than the length of the minimum element among the elements obtained by dividing the intersection, and two or more elements are included within the allowable error. It is possible to perform accurate error correction by preventing the deletion of the, and it is highly reliable. Also, by providing an accurate error correction, an allowable error value can be easily set without relying on the experience and intuition of the user, and a correction work time can be shortened to provide a graphic processing device with excellent workability. With the goal.

[0007]

To achieve this object, a graphic processing apparatus according to claim 1 of the present invention comprises an input section for inputting and designating characters, numerical values, graphic elements, positions, etc., and an input. Designated by the input section, a display section that displays the characters, numerical values, graphic elements, positions, etc. input and designated by the section, a storage section that stores the shape data of the three drawings created on the display screen of the display section, and the like. 3D drawing input means for inputting the shape data of the 3D drawing and the intersection dividing means for dividing the 3D shape data inputted by the 3D drawing input means at the intersections where the line segments intersect, and the intersection dividing A graphic processing device comprising: a solid-model conversion unit that creates a three-dimensional solid model by matching each element divided by the unit based on a permissible error value stored in a storage unit. Is the element divided by the intersection dividing means? A minimum element detecting unit for detecting the minimum element; and an error value changing unit for setting a value calculated from the value of the minimum element detected by the minimum element detecting unit as an allowable error value, The graphic processing device according to Item 2 has a configuration including error value conversion means for setting a value obtained by subtracting 1/10 of the value of the minimum element from the value of the minimum element as a new allowable error value. There is.

Here, as the allowable error value, a value obtained by subtracting 1/10 of the length of the minimum element from the length of the minimum element among the elements divided by the intersection dividing means can be preferably used. However, other values may be used as long as the allowable error value does not include two or more elements.

[0009]

With this configuration, the minimum element detecting means of the control section detects the minimum element from the elements divided by the intersection dividing means, and the error value changing means calculates from the value of the minimum element detected by the minimum element detecting means. Since two or more elements are not included in the allowable error value in order to set the above value as the allowable error value, the error correction can be accurately performed without deleting each element. Since the error value conversion means sets a value obtained by subtracting 1/10 of the value of the minimum element from the value of the minimum element as a new allowable error value, the allowable error value is too long to recognize the minimum element, or Tolerance value is too short, the range of correction is narrowed when matching each drawing in 3 views,
Optimal error correction can be performed without losing the function of automatically matching.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A graphic processing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram of a graphic processing apparatus according to an embodiment of the present invention. Reference numeral 1 is an input unit, 2 is a display unit, 3 is a storage unit, 4 is a three-view drawing input unit, 5 is an intersection dividing unit, 8 is a solid model conversion unit, and 9 is a control unit, which are the same as conventional ones. Omit it. Reference numeral 6 is a minimum element detecting means for detecting the smallest element among the elements divided by the intersection dividing means 5.
Reference numeral 7 is an error value changing means for changing the allowable error value based on the element detected by the minimum element detecting means 6.

The operation of the graphic processing apparatus having the above-described structure according to the embodiment of the present invention will be described below. 2 is an overall flowchart of the graphic processing apparatus according to the embodiment of the present invention, FIG. 3 is a flowchart of intersection division of the graphic processing apparatus according to the embodiment of the present invention, and FIG. 4 is a flowchart of the embodiment of the present invention. 6 is a flow chart for detecting the minimum element of the graphic processing apparatus, FIG. 5 is a flow chart for changing the allowable error value of the graphic processing apparatus in one embodiment of the present invention, and FIG. 6 (a) is a graphic processing in one embodiment of the present invention. It is a figure which shows an example of the three-dimensional view before a conversion of an apparatus, and FIG.6 (b) is a figure which shows an example of the solid model after conversion of the figure processing apparatus in one Example of this invention. FIG. 7 is a diagram showing an example of a graphic element of the graphic processing device according to the embodiment of the present invention, and FIG. 8 is a diagram showing an example of all intersections of the graphic element of the graphic processing device according to the embodiment of the present invention. FIG. 9 is a diagram showing an example of the graphic processing device according to the embodiment of the present invention after the intersection of the graphic elements, and FIG. 10 is parallel to the X axis and the Y axis of the graphic processing device according to the embodiment of the present invention. FIG. 11 is a diagram showing an example of a graphic element, and FIG. 11 is a diagram showing an example of a graphic element which is not parallel to the X axis and the Y axis of the graphic processing apparatus according to the embodiment of the present invention. In FIG. 7, A to F are elements forming the read shape data, G to N in FIG. 8 are intersections where the elements intersect, and O to X in FIG. 9 are elements divided at each intersection. is there.
Here, a case will be described in which the shape data of a three-view drawing as shown in FIG. 6A is converted into a three-dimensional solid model as shown in FIG. 6B. First, start the solid model creation command and enter the input section 1 from the CAD system.
The three-view drawing input means 4 reads the shape data of the three-view drawing by designating the three-view drawing in a rectangular shape using (S8). Next, the intersection dividing means 5 divides the shape data of the three views read in S8 at all intersections (S).
9). Details of the intersection division will be described later. Next, the smallest element of the graphic elements divided by the intersections by the minimum element detecting means 6 is detected (S10). Details of the minimum element detection will be described later. Next, the error value changing means 7 changes the allowable error value based on the length of the minimum element detected in S10 (S11). Details of changing the allowable error value will be described later. Next, the solid model converting means 8 converts the solid model based on the allowable error changed in S11 (S1).
2).

The details of the intersection division in S9 will be described with reference to FIG. First, as shown in FIG.
A graphic element is input as one of the three views (S1
3). Next, as shown in FIG. 8, G to N at which each element intersects
8 intersections are searched for (S14). Next, the six elements A to F are divided at the eight intersections G to N detected in S14, and are divided into ten elements O to X as shown in FIG. 9 (S15).

Details of the minimum element detection in S10 will be described with reference to FIG. First, one of the elements divided in S9 is read (S16). Next, it is determined whether the read element is parallel to the X axis as shown in (a) of FIG. 10 (S17). If Yes, the length of X is set as a measurement value (S18), and the process jumps to S25. If No, it is determined whether or not it is parallel to the Y axis (S18).
19). If Yes, the length of Y is used as the measured value (S
20), jump to S25, and if No, measure the relative lengths of the X-axis and the Y-axis (S21). Next, it is determined whether the relative length of the X axis is longer than the relative length of the Y axis (S
22). If Yes, that is, if the relative length of the X axis is long, the relative length of the Y axis is set as the measured value (S23), No.
If, that is, if the relative length of the Y axis is long, the relative length of the X axis is used as the measurement value (S24). Next, it is determined whether or not the length of the elements from which the measured values are read is the minimum (S
25). If No, jump to S27, Yes
If it is, the minimum value is saved as an allowable error value (S2
6). Next, it is determined whether or not all the elements have been read in order to determine whether or not the processing may be ended (S27). If No, that is, if there are remaining elements, jump to S16, and if Yes, that is, if all elements have been read, end.

Details of the change of the allowable error value in S11 will be described with reference to FIG. First, the length of the minimum element detected in S10 is read (S28). next,
From the value of the minimum element read in S28, 1 / of the minimum element
The value of 10 is subtracted, and the value is set as the allowable error value (S2
9).

In the present embodiment, the value of the smallest element among the elements divided as the permissible error value is calculated to be 1/10 of the smallest value.
Although the value obtained by subtracting the value of is used, another value may be used as long as the allowable error value does not include two or more elements.

[0016]

As described above, according to the present invention, the minimum element detecting means of the control unit detects the minimum element from the elements divided by the intersection dividing means, and the error value changing means detects the minimum element by the minimum element detecting means. Since the value calculated from the element value is used as the allowable error value, no more than two elements are included in the allowable error value. Therefore, correct the error without deleting each element. Since the error value converting means sets a value obtained by subtracting 1/10 of the value of the minimum element from the value of the minimum element as a new allowable error value, the allowable error value is too long and the minimum element can be recognized. If there is not, or the allowable error value is too short, the range of correction is narrowed when matching each drawing in the three-view drawing, and the function of automatically matching is not lost, and the optimum error correction is performed. Can be done without relying on the experience or intuition of the user. Easy to can be set to error correct the allowable error value, in which reliability can be shortened error correction time, an excellent graphic processing apparatus workability can be realized.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a graphic processing device according to an embodiment of the present invention.

FIG. 2 is an overall flowchart of a graphic processing device according to an embodiment of the present invention.

FIG. 3 is a flowchart of intersection division of the graphic processing device according to the embodiment of the present invention.

FIG. 4 is a flowchart of minimum element detection of the graphic processing apparatus according to the embodiment of the present invention.

FIG. 5 is a flowchart for changing an allowable error value of the graphic processing apparatus according to the embodiment of the present invention.

FIG. 6 (a) is a diagram showing an example of a three-view drawing before conversion of the graphic processing device according to the embodiment of the present invention. (B) An example of a solid model after conversion of the graphic processing device according to the embodiment of the present invention. Showing

FIG. 7 is a diagram showing an example of a graphic element of the graphic processing apparatus according to the embodiment of the present invention.

FIG. 8 is a diagram showing an example of all intersections of graphic elements of the graphic processing apparatus according to the embodiment of the present invention.

FIG. 9 is a diagram showing an example of the graphic processing device according to the embodiment of the present invention after the intersection of the graphic elements is divided.

FIG. 10 is an X of the graphic processing apparatus according to the embodiment of the present invention.
The figure which shows an example of the graphic element parallel to the axis and the Y-axis

FIG. 11 is an X diagram of a graphic processing apparatus according to an embodiment of the present invention.
The figure which shows an example of the graphic element which is not parallel to the axis and the Y-axis

FIG. 12 is a functional block diagram of a conventional graphic processing device.

FIG. 13 is a flowchart of a conventional graphic processing device.

14A is a diagram showing an example of a three-view drawing of a conventional graphic processing device before conversion, and FIG. 14B is a diagram showing an example of a solid model after conversion of the conventional graphic processing device.

[Explanation of symbols]

 1, 10 Input section 2, 11 Display section 3, 12 Storage section 4, 13 3 View input means 5, 14 Intersection dividing means 6 Minimum element detecting means 7 Error value changing means 8, 15 Solid model converting means 9, 16 Control Department

Claims (2)

[Claims] 1. An input unit for inputting and specifying characters, numerical values, graphic elements, positions, etc .; a display unit for displaying the characters, numerical values, graphic elements, positions, etc. input and specified by the input unit; A storage unit that stores shape data and the like of the three drawings created on the display screen of the display unit, a three-view drawing input unit that inputs shape data and the like of the three views specified by the input unit, and the three surfaces An intersection dividing unit that divides the shape data of the three views input by the diagram input unit at an intersection where each line segment intersects, and an allowable error value stored in the storage unit for each element divided by the intersection dividing unit. And a solid model conversion means for creating a three-dimensional solid model in accordance with the above, wherein the control portion selects a minimum element from the elements divided by the intersection dividing means. Minimum element detecting means for detecting, Graphic processing apparatus characterized by comprising a an error value changing means for the tolerance value a value calculated from the value of the detected smallest element by the detection means. 2. The value of the minimum element to 1 / of the value of the minimum element
The graphic processing apparatus according to claim 1, further comprising error value conversion means for setting a value obtained by subtracting the value of 10 as a new allowable error value.