JPH0916653A - Graphic processing apparatus and graphic processing method - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a graphic processing device capable of measuring a two-dimensional distance with respect to two points in a designated three-dimensional space with respect to a currently displayed direction. To do. [Structure] An element selection unit 9 that selects two three-dimensional graphic elements that are distance measurement targets, a view data acquisition unit 10 that acquires a normal vector to the absolute coordinate system of the currently displayed view, and an arbitrary position , A plane creating unit 11 for creating a virtual surface of a direction and a size, and a two-dimensional graphic element by projecting the three-dimensional graphic element selected by the element selecting unit 9 onto the virtual surface of an arbitrary position, direction and size. Projecting unit 12 for obtaining
The two-dimensional distance measuring unit 13 for measuring the distance between the two two-dimensional graphic elements obtained in 2.

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 such as a CAD device and a graphic processing method thereof.

[0002]

2. Description of the Related Art In recent years, in the field of mechanical design, work with a CAD device has become widespread due to the design of complicated shapes.
According to the CAD device, an object can be defined in a three-dimensional space and a completed model of the design object can be confirmed in advance. However, a conventional graphic processing device such as a CAD device is targeted for modeling work, and cannot obtain a two-dimensional distance between graphic elements when viewed from a certain direction, which is necessary for actual mechanical design.

A conventional graphic processing device will be described below. FIG. 4 is a block diagram showing a conventional graphic processing device. In FIG. 4, 1 is an input unit for inputting data such as characters and numerical values, such as a keyboard, tablet, mouse, etc., 2 is a display unit for displaying windows, graphic elements, characters and the like, 3
Is a coordinate designation unit for selecting coordinates and elements on the display screen displayed on the display unit 4, 4 is a main storage unit for storing running programs such as an operating system and window system, and 5 is a graphic processing program storage unit. Next storage,
6 is a database unit for accumulating graphic data, 7 is a 3D graphic processing program storage unit for storing a 3D graphic processing program for performing 3D graphic processing, 8 is a control unit for processing requested information, and 9 is An element selection unit for selecting an element or coordinates that the user wants to measure, 14 is a database access unit for reading and writing from the database unit 6, and 15 is a tertiary for measuring the distance between the two three-dimensional graphic elements selected by the element selection unit 9. It is an original distance measuring unit, and the secondary storage unit 5 has a database unit 6 and a three-dimensional figure processing program storage unit 7.

The operation of the graphic processing device configured as described above will be described with reference to FIG. FIG. 5 is a flow chart showing the operation of the conventional graphic processing apparatus. First, the user wants to measure the distance in the element selection unit 9 2
One of the three-dimensional graphic elements is selected on the display unit 2 for displaying the three-dimensional object, and the two selected three-dimensional graphic elements are loaded into the input unit 1 (S11). Next, the control unit 8 uses the database access unit 14 to obtain the shape data of the three-dimensional object displayed on the display unit 2 from the database unit 6 to the main storage unit 4.
Read in (S12). Next, the three-dimensional distance measuring unit 15
Acquires the shape data of the three-dimensional object read from the database unit 6 and the two three-dimensional graphic elements selected by the element selection unit 9 via the control unit 8, and the tertiary of the two selected three-dimensional graphic elements is acquired. The shortest distance in the original space is measured (S13). Finally, the shortest distance measured in step 13 is displayed on the display unit 2.

FIG. 6 is a display diagram showing the shortest distance between graphic elements of a conventional graphic processing apparatus. Two hole shapes are added to the three-dimensional graphic element shown in FIG. The positional relationship is as shown in FIG. 6, and the user obtains the shortest distance C in the three-dimensional space between the center lines of the two hole shapes by the flow of FIG.

[0006]

However, in the above-mentioned conventional graphic processing apparatus, the shortest distance between two points in the three-dimensional space is measured and displayed, and the two-dimensional two-dimensional points viewed from a certain direction are used. The distance could not be measured.

The present invention solves the above-mentioned conventional problems, and is a graphic processing capable of measuring a two-dimensional distance with respect to two directions in a designated three-dimensional space with respect to a currently displayed direction. An object is to provide a device and a graphic processing method capable of measuring a two-dimensional distance.

[0008]

In order to achieve this object, a graphic processing apparatus according to claim 1 of the present invention comprises an element selecting section for selecting two three-dimensional graphic elements to be distance measured, and a current display. View data acquisition unit that acquires the normal vector to the absolute coordinate system of the existing view, the surface creation unit that creates a virtual surface of any position, direction, and size, and the three-dimensional figure selected in the element selection unit A projection unit that projects a two-dimensional figure element by projecting the element on a virtual surface of an arbitrary position, direction, and size, and two-dimensional distance measurement that measures the distance between the two two-dimensional figure elements obtained by the projection unit. And a part having a part.

The graphic processing method according to claim 2 is an element selecting step for selecting two three-dimensional graphic elements to be distance-measured, and a view for acquiring a normal vector to the absolute coordinate system of the currently displayed view. Data acquisition step, surface creation step to create a virtual surface of any position, direction and size, and projection of the 3D graphic element selected in the element selection step onto a virtual surface of any position, direction and size. And a two-dimensional distance measuring step for measuring the distance between the two two-dimensional graphic elements obtained in the projecting step.

[0010]

With the above structure, the two selected three-dimensional graphic elements are projected onto a virtual surface having an arbitrary position, direction and size to obtain two two-dimensional graphic elements, and the two two-dimensional graphic elements are separated from each other. Since the distance between two graphic elements in the selected three-dimensional space when viewed from a certain direction can be measured two-dimensionally, the efficiency of actual mechanism design can be improved. Can be realized.

[0011]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a graphic processing apparatus according to an embodiment of the present invention. In FIG. 1, 1 is an input unit, 2 is a display unit, 3 is a coordinate designation unit, 4 is a main storage unit, 5 is a secondary storage unit, 6 is a database unit, 7 is a three-dimensional figure processing program storage unit, and 8 is Control unit, 9 is element selection unit, 14
Is a database access unit, and these are the same as those in FIG. 4, so the same reference numerals are given and description thereof is omitted. 10
Is the view that is currently displayed (for the graphic information to be displayed on the screen, as if the operator were looking through the camera, the visual plane according to the direction of the operator's line of sight, or the orientation or graphic data relating to the visual plane The view data acquisition unit for acquiring a normal vector with respect to the absolute coordinate system of
A surface creation unit that creates a virtual surface of an arbitrary size, 12 is a projection unit that projects a specified two-dimensional graphic element onto an arbitrary surface, 1
Reference numeral 3 is a two-dimensional distance measuring unit that measures the distance between two designated two-dimensional graphic elements.

The operation of the graphic processing apparatus configured as described above will be described with reference to the flowchart of FIG. As a preparation, the input unit 1 performs an operation for entering a mode for measuring the distance between two elements. By this operation, the control unit 8
Recognizes that it is in the two-element distance measurement mode, and causes the graphic processing apparatus of FIG. 1 to perform the operation shown in the flowchart of FIG. First, the element selection unit 9 is similar to that in the conventional device.
Two three-dimensional graphic elements displayed on the display unit 2 are selected for distance measurement, and the two selected three-dimensional graphic elements are taken into the input unit 1 (S1, element selection step).
Next, the control unit 8 uses the database access unit 14 to read the shape data of the selected three-dimensional graphic element from the database unit 6 into the main storage unit 4 (S2). Next, the view data acquisition unit 10 acquires a normal vector of the currently displayed view with respect to the absolute coordinate system (S3, view data acquisition step). Next, the surface creation unit 11 creates a surface having a sufficient size such that the current view direction (direction in which the three-dimensional space is viewed) becomes a normal vector, that is, a virtual projection surface (S4, surface creation step). ). Next, the projection unit 1
2 projects the two 3D graphic elements read in step 2 onto the virtual projection plane created in step 4 to create a projected 2D graphic element (S5, projection step). Next, the two-dimensional distance measuring unit 13 measures the shortest distance of the two-dimensional graphic element newly created by projection (S).
6, two-dimensional distance measurement step). Finally, the shortest distance measured in step 6 is displayed on the display unit 2 (S7).

FIG. 3 is a display diagram showing a case where the shortest distance is displayed on the display unit 2 for a specific graphic element. FIG.
Two hole shapes are added to the three-dimensional graphic element shown in FIG. The positional relationship is as shown in FIG. 3, and the operation shown in the flowchart of FIG. 2 allows the user to measure the distance between the center lines of the two hole shapes in a state viewed from an arbitrary view direction. it can. For example, the distance A in the plan view
The distance B in the right side view can be measured.

In the above embodiment, selection of elements, acquisition of view data, creation of a virtual projection plane, creation of projected graphic elements, measurement of the shortest distance of graphic elements, display of the shortest distance, and access to the database unit 6. Although the respective units 9 to 14 are shown to perform the above, these may be realized by a computer program, that is, the control unit 8 may be configured to have a function realizing unit having a function equivalent to that of each unit 9 to 14.

As described above, according to the present embodiment, two selected three-dimensional graphic elements are projected on a virtual surface having an arbitrary position, an arbitrary direction and an arbitrary size to form two two-dimensional graphic elements. Since the distance is obtained and the distance between the two two-dimensional graphic elements is measured, the distance between the two graphic elements in the selected three-dimensional space when viewed from a certain direction is two-dimensionally measured. Therefore, the efficiency of the actual mechanism design can be improved.

[0017]

As described above, according to the present invention, the element selecting section for selecting two three-dimensional graphic elements to be distance-measured and the view for acquiring the normal vector to the absolute coordinate system of the currently displayed view. Data acquisition unit, surface creation unit that creates a virtual surface of any position, direction and size, and project the 3D graphic element selected in the element selection unit onto a virtual surface of any position, direction and size. And a two-dimensional distance measuring unit for measuring the distance between the two two-dimensional graphic elements obtained by the projecting unit. Since the projection unit projects two two-dimensional figure elements by projecting onto the virtual surface and the distance between the two two-dimensional figure elements is measured by the two-dimensional distance measuring section, it is viewed from a certain direction. When the two in the selected three-dimensional space The distance between the shape element can be measured two-dimensionally, it is possible to realize a graphic processing apparatus capable of improving the efficiency of the actual mechanism design.

Further, an element selecting step for selecting two three-dimensional graphic elements as distance measurement targets, a view data acquiring step for acquiring a normal vector of the currently displayed view with respect to the absolute coordinate system, and an arbitrary position , A plane creation step for creating a virtual surface of a direction and a size, and a two-dimensional graphic element is obtained by projecting the three-dimensional graphic element selected in the element selection step onto a virtual surface of an arbitrary position, direction and size. By having a projection step and a two-dimensional distance measurement step of measuring the distance between the two two-dimensional graphic elements obtained in the projection step, the two selected three-dimensional graphic elements are projected onto the virtual plane to generate 2 Get two 2D graphic elements,
Since the distance between the two two-dimensional graphic elements is measured, the distance between the two graphic elements in the selected three-dimensional space when viewed from a certain direction can be measured two-dimensionally. Therefore, it is possible to realize a graphic processing method that can improve the efficiency of actual mechanism design.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the operation of the graphic processing apparatus of FIG. 1;

FIG. 3 is a display diagram showing a case where the display unit displays the shortest distance for a specific graphic element in the apparatus of FIG.

FIG. 4 is a block diagram showing a conventional graphic processing device.

FIG. 5 is a flowchart showing the operation of a conventional graphic processing device.

FIG. 6 is a display diagram showing the shortest distance between graphic elements of a conventional graphic processing apparatus.

[Explanation of symbols]

 1 Input Section 2 Display Section 3 Coordinate Designation Section 4 Main Storage Section 5 Secondary Storage Section 6 Database Section 7 3D Graphic Processing Program Storage Section 8 Control Section 9 Element Selection Section 10 View Data Acquisition Section 11 Surface Creation Section 12 Projection Section 13 Two-dimensional distance measuring unit 14 Database access unit

Claims (2)

[Claims] 1. An element selection section for selecting two three-dimensional graphic elements as distance measurement targets, a view data acquisition section for acquiring a normal vector of the currently displayed view with respect to the absolute coordinate system, and an arbitrary position. , A plane creating unit for creating a virtual surface of a direction and a size, and a two-dimensional graphic element by projecting the three-dimensional graphic element selected by the element selecting unit onto the virtual surface of the arbitrary position, direction and size. And a two-dimensional distance measuring unit for measuring a distance between two two-dimensional graphic elements obtained by the projecting unit. 2. An element selecting step of selecting two three-dimensional graphic elements as distance measurement targets, a view data acquiring step of acquiring a normal vector of the currently displayed view with respect to the absolute coordinate system, and an arbitrary position. , A plane creating step of creating a virtual surface of a direction and a size, and a two-dimensional graphic element by projecting the three-dimensional graphic element selected in the element selecting step onto the virtual surface of the arbitrary position, direction and size. And a two-dimensional distance measuring step for measuring the distance between the two two-dimensional graphic elements obtained in the projecting step.