JPH0844783A - Graphic processor - Google Patents

Abstract

PURPOSE:To provide the graphic processor with superior reliability and operability which can restore a three-dimensional solid model without correcting a two-dimensional trihedral drawing by automatically converting an arc part that can not be restored to the three-dimensional solid model on the two-dimensional trihedral drawing into shape data which can be restored. CONSTITUTION:This graphic processor is equipped with an input part 1 for input specification, a display part 2 for display, and a control part 7 having a two-dimensional drawing input means 4 which inputs shape data, etc., a solid model converting means 5 which restores the solid model, and a solid model display means 6 which displays the converted solid model, and also has a beveling conversion means 3 which substitutes a segment connecting the end points of the arc of arc data for the arc.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is particularly applicable to Computers.
The present invention relates to a graphic processing device called Aided Design (hereinafter abbreviated as CAD).

[0002]

2. Description of the Related Art In recent years, the consistency or conformity of graphic elements between each drawing is adjusted from a drawing drawn in a two-dimensional three-view drawing,
Restoration to a solid model, which is a three-dimensional solid drawing, is being performed.

A conventional graphic processing apparatus will be described below with reference to the drawings. FIG. 18 is a functional block diagram of a conventional graphic processing device. Reference numeral 10 is an input section for inputting and designating characters, numerical values, graphic elements, positions, etc., 11 is an input section 1.
A display unit for displaying characters, numerical values, graphic elements, positions, etc. input by 0, 12 is a two-dimensional drawing input unit for inputting shape data, etc. specified by the input unit 10, and 13 is a two-dimensional drawing input unit 12 Solid model conversion means for restoring a solid model based on the shape data of the three views input in
Reference numeral 14 is a solid model display means for displaying the three-dimensional graphic elements converted by the solid model conversion means 13, and reference numeral 15 is a control unit for controlling the entire apparatus.

The operation of the conventional graphic processing apparatus having the above-described structure will be described below. FIG. 19 is a flowchart of a conventional graphic processing apparatus, and FIG. 20 is a diagram showing a three-dimensional view of a conventional graphic processing apparatus before and after conversion and an example of a three-dimensional solid model. First, 3 drawn in two dimensions
The plan data is read (S1). Next, based on the data read in S1, all the data are loaded on the three-dimensional coordinate axes in consideration of the matching or matching of the data between the views viewed from each direction (S2). Next, based on the data captured in S2, it is determined whether or not it can be configured as a closed solid on the three-dimensional coordinate axes (S3). If No, the process jumps to S1, and if Yes, a three-dimensional solid model is restored (S4).

[0005]

However, in the above-mentioned conventional configuration, in the case of a figure having an arc such as a circle, an annulus, or a cone, a two-dimensional three-dimensional drawing cannot represent an accurate shape or a two-dimensional figure. However, if the shape data from the three views is not consistent, there is a lack of data because of the consistency and conformity between drawings.
In some cases, it may not be possible to create a completely closed solid on the dimensional coordinate axes, and it is not possible to restore an accurate three-dimensional solid model. There was a problem in that reliability and workability were lacking because conversion had to be performed again considering consistency or conformity between drawings.

The present invention solves the above-mentioned problems of the prior art by automatically converting an arc portion that cannot be restored to a three-dimensional solid model on a two-dimensional three-view drawing into shape data that can be restored. An object of the present invention is to provide a graphic processing device which is capable of restoring a three-dimensional solid model without modifying a two-dimensional three-view drawing and which is excellent in reliability and workability.

[0007]

In order 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 section. The display unit for displaying the characters, numerical values, graphic elements, positions, etc. input in step 2, the two-dimensional drawing input means for inputting the shape data etc. specified by the input section, and the three-dimensional drawing input means for inputting 3 And a control unit having a solid model conversion means for restoring a solid model based on the shape data of the floor plan, and a solid model display means for displaying the three-dimensional graphic elements converted by the solid model conversion means. The graphic processing device provided, wherein the control unit has chamfering conversion means for replacing the arc of the shape data input and designated by the input unit with a line segment connecting the end points of the arc, and The graphics processor is a character, The input section for inputting and specifying values, graphic elements, positions, etc., the display section for displaying the characters, numerical values, graphic elements, positions, etc. input by the input section, and the shape data etc. specified by the input section Two-dimensional drawing input means for inputting,
Solid model conversion means for restoring a solid model based on the shape data of the three views input by the two-dimensional drawing input means, and solid model display for displaying the three-dimensional graphic elements converted by the solid model conversion means A graphic processing device comprising: a control unit having means; and a line connecting the arcs of the shape data input and designated by the input unit by the control unit to each end point of the arc and the intersection of the tangents at each end point. The graphic processing device according to claim 3, further comprising squaring conversion means for substituting minutes, an input unit for inputting and designating characters, numerical values, graphic elements, positions, etc., and a character input by the input unit. , A display unit for displaying numerical values, graphic elements, positions, etc., and a two-dimensional drawing input means for inputting shape data etc. designated by the input unit,
Solid model conversion means for restoring a solid model based on the shape data of the three views input by the two-dimensional drawing input means, and solid model display for displaying the three-dimensional graphic elements converted by the solid model conversion means And a control unit having means, wherein the control unit replaces the circular arc of the shape data input and designated by the input unit with a line segment connecting the division points of the circular arc. It has a configuration with.

Here, the dividing / chamfering converting means can change the dividing number according to the radius of the target arc.

[0009]

With this configuration, the input unit inputs and specifies characters, numerical values, graphic elements, positions, etc., and the display unit displays the characters, numerical values, graphic elements, positions, etc. input by the input unit, and the control unit The 2D drawing input means inputs the shape data etc. specified by the input section, and the solid model conversion means restores the solid model based on the 3D drawing shape data etc. inputted by the 2D drawing input means. Then, the solid model display means displays the three-dimensional graphic element converted by the solid model conversion means, and the chamfer conversion means replaces the arc of the shape data input and designated by the input section with the line segment connecting the end points of the arc. Then, the squaring conversion means replaces the circular arc of the shape data input and designated by the input section with a line segment connecting each end point of the circular arc and an intersection of tangents at each end point, and the divided chamfer conversion means inputs it at the input section. The specified shape In order to replace the arc of the data with the line segment that connects the dividing points of the arc, the arc part that cannot be converted to the solid model can be approximated while considering the consistency and matching, and can be converted to the 3D solid model. It can be converted into shape data.

[0010]

【Example】

(Embodiment 1) 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 the first embodiment of the present invention. Reference numeral 1 is an input unit, 2 is a display unit, 4 is a two-dimensional drawing input unit, 5 is a solid model conversion unit, 6 is a solid model display unit, and 7 is a control unit. Reference numeral 3 denotes a chamfer conversion means for replacing the arc of the shape data input and designated by the input unit 1 with a line segment connecting the end points of the arc.

The operation of the graphic processing apparatus of the present invention configured as described above will be described below. Figure 2
FIG. 3 is a flow chart of the graphic processing apparatus according to the first embodiment of the present invention, and FIG. 3 is a diagram showing a three-dimensional view before and after conversion of the graphic processing apparatus according to the first embodiment of the present invention and an example of a three-dimensional solid model. FIG. 4 is a diagram showing an example of three views of the conversion process of the graphic processing apparatus in the first embodiment of the present invention, and FIG. 5 is a flow chart of the graphic processing apparatus in the first embodiment of the present invention. FIG. 6 shows the first embodiment of the present invention.
FIGS. 7A and 7B are diagrams showing an example of a three-dimensional view and a three-dimensional solid model before and after conversion when two or more arcs of the graphic processing apparatus in the embodiment are mixed, and FIG. 7 is a graphic processing in the first embodiment of the present invention. It is a figure which shows an example of the 3rd figure of the conversion process in case two or more arcs of a device coexist. First, as shown in FIG. 2, an arc portion that cannot be converted into a three-dimensional solid model from the two-dimensional three-view drawing is extracted from the three-view drawing (S5).
Here, the arc of the front view in C of FIG. 3 is targeted. Next, a line segment including the arc extracted in S5 is detected from another plan as shown in E of FIG. 4 (S6). Next, a line segment representing the shape of the extracted arc is detected from another drawing (S7). Next, the length of the candidate line segment is limited to the line segment selected in S5 as shown in F of FIG. 9 (S
8). Next, a C-plane edge line as shown in G of FIG. 4 is created based on the inclination and length of the line segment extracted in S8, with the point at which the end point of the target arc is projected on each plan as the base point. (S
9). Next, it is replaced with a C-plane line connecting the end points of the circular arc as shown in H of FIG. 4 (S10). Next, the two-dimensional drawing input means 4 takes in the data obtained in S5 to S10 on the three-dimensional coordinate axes (S11). Next, the solid model converting means 5 restores a three-dimensional solid model based on the data obtained in S11 (S1).
2). Next, by the solid model display means 6, S1
The solid model restored in 1 is displayed on the display unit 2 (S13).

Here, a case where two or more arcs are mixed in a two-dimensional three-view drawing will be described. First, as shown in FIG. 5, C-plane edge lines and C-plane lines are created in the same manner as S5 to S10. Next, a level is added to the C-plane edge line and the C-plane line, and the C-plane edge line is sequentially paired with line segments extending from both end points of the arc (S1).
4). Here, the level of the line segment created first is L
1, the pair shown in the front view of F in FIG. 7 is P1, and the pair shown in the right side view is P2. Next, when drawing the C-plane edge line and the C-plane line, it is determined whether or not they intersect with other C-plane edge lines and the C-plane line (S15). If No, the process jumps to S14, and if Yes, it is determined whether the level of the intersecting C-plane edge line is L1 (S16). If Yes, the side that intersects with the C-plane edge line of level L1 is left, and the other point is deleted (S17). If No, the line segment connecting the intersections of the pair of intersecting line segments is level L.
It is created as a line segment of 2 (S18). Here, H in FIG.
As shown in, when the newly created line segment of level L2 intersects with another line segment, the line segment is defined up to the intersection. Next, the solid model is restored in the same manner as S11 to S13.

(Embodiment 2) A graphic processing apparatus according to a second embodiment of the present invention will be described below with reference to the drawings. FIG. 8 is a functional block diagram of the graphic processing apparatus according to the second embodiment of the present invention. 1 is an input unit, 2 is a display unit,
Reference numeral 4 is a two-dimensional drawing input means, 5 is a solid model conversion means, 6 is a solid model display means, 7 is a control unit,
The description is omitted because it is the same as the conventional one. Reference numeral 8 denotes squaring conversion means for replacing the arc of the shape data input and designated by the input unit 1 with a line segment connecting each end point of the arc and the intersection of the tangent lines at each end point.

The operation of the graphic processing apparatus of the present invention configured as described above will be described below. Figure 9
FIG. 10 is a flow chart of the graphic processing apparatus according to the second embodiment of the present invention, and FIG. 10 is a diagram showing an example of a three-dimensional view and a three-dimensional solid model before and after conversion of the graphic processing apparatus according to the second embodiment of the present invention. FIG. 11 is a diagram showing an example of a three-view drawing of the conversion process of the graphic processing device according to the second embodiment of the present invention, and FIG. 12 is a conversion of the graphic processing device according to the second embodiment of the present invention. FIG. 13 is a diagram showing an example of front and rear three views and an example of a three-dimensional solid model, and FIG. 13 is a diagram showing an example of three views of a conversion process of the graphic processing apparatus according to the second embodiment of the present invention. First, as shown in FIG. 9, two-dimensional 3
An arc that cannot be converted into a three-dimensional solid model is extracted from the plan view (S19). Next, a tangent line is drawn to each end point of the arc extracted in S19 to create a line segment connecting the end point of the arc and the intersection of the tangent lines in the arc as shown in F of FIG. 11 (S20). Next, it is determined whether the tangents at the end points of the arc are both parallel to the X axis (S21). If Yes, the process jumps to S23, and if No, a line segment that passes through the point where the intersection of the tangents is projected is generated for the plan in the X-axis direction (S22). Next, it is determined whether the tangents at the end points of the arc are both parallel to the Y axis (S23). Y
If it is es, the process jumps to S25. If it is No, a line segment passing through the point where the intersection of the tangents is projected is generated for the plan in the Y-axis direction (S24). Next, the two-dimensional drawing input means 4 inputs the data obtained by the chamfer conversion means 3 on the three-dimensional coordinate axes (S25). Next, the solid model converting means 5 restores a three-dimensional solid model based on the data obtained in S25 (S).
26). Next, by the solid model display means 6, S
The solid model restored in 26 is displayed on the display unit 2 (S27).

Now, the process of determining the drawing range of a line segment representing a new shape obtained by projecting an intersection point with respect to another plan view that occurs after cornering of the target arc will be described. First, the corresponding line segment of the circular arc is searched for in the plan view. Here, as shown in E of FIG. 13, four line segments are candidates. The projection line generated by squaring this arc can draw up to three lines between four line segments as shown in F of FIG. 13, but it is impossible to judge whether all lines can be drawn. Then, the same processing is performed on the right side view. Here, as shown by G in FIG. 13, four candidate lines are detected, and as shown by H in FIG. 13, two candidate lines are detected as line segment candidates that represent the shape of the arc. Limit the projection line. Next, in the right side view, the limited projection line is fed back to the plan view to
The number of projection lines is limited to two as indicated by I in 3.

(Embodiment 3) A graphic processing apparatus according to a third embodiment of the present invention will be described below with reference to the drawings. FIG. 14 is a functional block diagram of the graphic processing apparatus in the third embodiment of the present invention. Reference numeral 1 is an input unit, 2 is a display unit, 4 is a two-dimensional drawing input unit, 5 is a solid model conversion unit, 6 is a solid model display unit, and 7 is a control unit. Reference numeral 9 denotes a division chamfer conversion means for replacing the arc of the shape data input and designated by the input unit 1 with a line segment connecting the division points of the arc.

The operation of the graphic processing apparatus of the present invention configured as described above will be described below. FIG.
5 is a flow chart of the graphic processing apparatus according to the third embodiment of the present invention, and FIG. 16 shows an example of a three-dimensional view and a three-dimensional solid model before and after conversion of the graphic processing apparatus according to the third embodiment of the present invention. FIG. 17 shows the third embodiment of the present invention.
FIG. 6 is a diagram showing an example of a three-view diagram of a conversion process of the graphic processing device in the embodiment of the present invention. First, as shown in FIG. 15, an arc that cannot be converted into a three-dimensional solid model is extracted (S2
8). Next, the radius of the circular arc is detected to determine the number of divisions of the circular arc extracted in S28 (S29). Next, S2
The angle to be divided is determined according to the radius detected in 9 (S30). Here, the division angle is determined based on the conversion table using the radius of the arc as a key. Next, as shown in F of FIG. 18, a line segment connecting the division points of the arc is drawn and the original arc is erased (S31). Next, by using the line segment drawn in S31, a projection line segment generated in another plan view is added to the plan view and the right side view as shown in G of FIG. 17 in the same manner as in Example 2 (S32). ). Next, S25 to S2 of the second embodiment
Conversion processing to a solid model is performed in the same manner as in 7 (S
33 to S35).

In this embodiment, the division / approximation conversion means divides the target arc into two, but the division angle can be determined according to the radius of the target arc, and the number of divisions can be changed.

[0019]

As described above, according to the present invention, the input section is composed of characters,
Numerical values, graphic elements, positions, etc. are input and specified, the display section displays the characters, numerical values, graphic elements, positions, etc. input by the input section, and the two-dimensional drawing input means of the control section inputs and specifies by the input section. The solid model conversion means inputs the shape data and the like, and the solid model conversion means restores the solid model based on the shape data of the three views input by the two-dimensional drawing input means. The converted three-dimensional graphic element is displayed, and the chamfering conversion means replaces the arc of the shape data input and specified by the input section with a line segment connecting the end points of the arc, and the squaring conversion means inputs and specifies by the input section. The arc of the shape data is replaced with a line segment that connects each end point of the arc and the intersection of the tangents at each end point, and the dividing chamfer conversion means inputs the shape data into the arc and divides the arc of the shape data specified by the input unit. Line connecting points In order to replace with, the arc part that cannot be converted into a solid model can be converted into shape data that can be converted into a 3D solid model by performing approximation while considering consistency and conformity. It is possible to realize a graphic processing device excellent in reliability and workability that can restore an accurate three-dimensional solid model without adjusting the property or conformity.

[Brief description of drawings]

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

FIG. 2 is a flowchart of the graphic processing apparatus according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an example of a three-dimensional view and a three-dimensional solid model before and after conversion of the graphic processing apparatus according to the first embodiment of the present invention.

FIG. 4 is a diagram showing an example of three views of a conversion process of the graphic processing apparatus according to the first embodiment of the present invention.

FIG. 5 is a flowchart of the graphic processing apparatus according to the first embodiment of the present invention.

6A and 6B are three views before and after the conversion when two or more arcs of the figure processing apparatus according to the first embodiment of the present invention are mixed.
Figure showing an example of a three-dimensional solid model

FIG. 7 is a diagram showing an example of a three-view diagram of a conversion process in the case where two or more arcs are mixed in the graphic processing apparatus according to the first embodiment of the present invention.

FIG. 8 is a functional block diagram of a graphic processing device according to a second embodiment of the present invention.

FIG. 9 is a flow chart of the graphic processing apparatus in the second embodiment of the present invention.

FIG. 10 is a diagram illustrating an example of a three-dimensional view and a three-dimensional solid model before and after conversion of the graphic processing device according to the second embodiment of the present invention.

FIG. 11 is a diagram showing an example of three views of a conversion process of the graphic processing device according to the second embodiment of the present invention.

FIG. 12 is a diagram showing an example of a three-dimensional view and a three-dimensional solid model before and after conversion of the graphic processing device according to the second embodiment of the present invention.

FIG. 13 is a diagram showing an example of three views of a conversion process of the graphic processing apparatus according to the second embodiment of the present invention.

FIG. 14 is a functional block diagram of a graphic processing device according to a third embodiment of the present invention.

FIG. 15 is a flowchart of a graphic processing device according to a third embodiment of the present invention.

FIG. 16 is a diagram showing an example of a three-dimensional view and a three-dimensional solid model before and after conversion of the graphic processing device according to the third embodiment of the present invention.

FIG. 17 is a diagram showing an example of three views of a conversion process of the graphic processing device according to the third embodiment of the present invention.

FIG. 18 is a functional block diagram of a conventional graphic processing device.

FIG. 19 is a flowchart of a conventional graphic processing device.

FIG. 20 is a diagram showing an example of a three-dimensional view and a three-dimensional solid model before and after conversion in a conventional graphic processing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1,10 Input part 2,11 Display part 3 Chamfer conversion means 4,12 Two-dimensional drawing input means 5,13 Solid model conversion means 6,14 Solid model display means 7,15 Control part 8 Square conversion means 9 Divided chamfer conversion means

Claims (3)

[Claims] 1. An input unit for inputting and specifying characters, numerical values, graphic elements, positions, etc., a display unit for displaying characters, numerical values, graphic elements, positions, etc. input by the input unit, and the input unit. Two-dimensional drawing input means for inputting the shape data etc. designated by the above, and solid model conversion means for reconstructing a solid model based on the three-dimensional drawing shape data etc. inputted by the two-dimensional drawing input means, A graphic processing device comprising: a control unit having a solid model display means for displaying the three-dimensional graphic elements converted by the solid model conversion means, wherein the control unit specifies an input by the input unit. A graphic processing apparatus comprising chamfering conversion means for replacing an arc of the shape data thus created with a line segment connecting end points of the arc. 2. An input unit for inputting and specifying characters, numerical values, graphic elements, positions, etc., a display unit for displaying characters, numerical values, graphic elements, positions, etc. input by the input unit, and the input unit. Two-dimensional drawing input means for inputting the shape data etc. designated by the above, and solid model conversion means for restoring a solid model based on the three-dimensional shape data etc. inputted by the two-dimensional drawing input means, A graphic processing device comprising: a control unit having a solid model display means for displaying the three-dimensional graphic elements converted by the solid model conversion means, wherein the control unit specifies an input by the input unit. A graphic processing device comprising: squaring conversion means for replacing an arc of the shape data thus created with a line segment connecting each end point of the arc and an intersection of tangents at each end point. 3. 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 by the input unit, and the input unit. Two-dimensional drawing input means for inputting the shape data etc. designated by the above, and solid model conversion means for restoring a solid model based on the three-dimensional shape data etc. inputted by the two-dimensional drawing input means, A graphic processing device comprising: a control unit having a solid model display means for displaying the three-dimensional graphic elements converted by the solid model conversion means, wherein the control unit specifies an input by the input unit. A graphic processing apparatus comprising: a divided chamfering conversion unit that replaces an arc of the generated shape data with a line segment connecting the division points of the arc.