JPH04180179A - Three-dimensional area indication system - Google Patents

Abstract

PURPOSE:To exactly indicate a three-dimensional area, and to improve an operating efficiency by providing a coordinate system setting part, cursor control part, and volume element calculating part. CONSTITUTION:A coordinate system setting part 1 sets a coordinate system or the size of the grid by the indication of an input indicating device 5, and transmits grid point data to a grid point managing part 33 in an area indicating part 3. Then, a three-dimensional graphic is prepared, and the three-dimensional area is indicated to it. A user operates a dial operation on the device 5 by referring to a sectional plane on a display screen 4, the coordinate value of the point of an area indication position is indicated, an input indicating device control part 31 decides the coordinate value, and a cursor control part 32 displays the cursor based on this. A volume element calculating part 34 calculates each grid point data by referring to the managing part 33, and searches the three-dimensional area being an object to be indicated. A display control part 2 draws the volume element on the screen 4 by a stereoscopic drawing method.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a three-dimensional region designation method for designating a three-dimensional region in an information processing system that performs generation, editing, drawing, etc. of three-dimensional figures in a three-dimensional space. Regarding.

[Conventional technology]

There are information processing systems that generate, edit, and draw 3D figures in 3D space for the purpose of making it easier to visually understand analysis results such as fluid analysis and structural analysis using 3D figure processing functions. do.

In conventional three-dimensional area designation methods for such information processing systems, three-dimensional area designation is generally performed by inputting coordinate values using an input designation device such as a keyboard or a three-dimensional locator.

FIG. 3 is a diagram illustrating an example of how a three-dimensional area is specified using a conventional three-dimensional area specifying method. The figure shows a case where a three-dimensional rectangular parallelepiped area (cuboid area S) is designated by inputting coordinate values using a three-dimensional locator.

The 3D locator is located at the position of the pen relative to the tablet.
represents the coordinate and Y coordinate, Z by the height of the pen position
It represents the coordinates. When the user positions the pen at a predetermined point and clicks a button, the coordinate values of that point are manually input.

In the example shown in FIG. 3, by positioning the pen at each vertex of the rectangular parallelepiped area S and clicking on it, the coordinate values of each vertex are input, making it possible to specify a predetermined rectangular parallelepiped area S.

[Problem to be solved by the invention]

In the conventional three-dimensional area instruction method described above, the three-dimensional area instruction method
To provide an easy-to-use man-machine interface that does not make operations complicated because coordinate values of several points (eight vertices in the rectangular parallelepiped region S in FIG. 3) must be input for specifying a dimensional region. The disadvantage is that it cannot be done.

In view of the above-mentioned points, an object of the present invention is to provide a three-dimensional area designation method that can improve operational efficiency in designating a three-dimensional area.

[Means to solve the problem]

The three-dimensional area designation method of the present invention is based on three-dimensional area designation method in three-dimensional space.
In an information processing system that performs generation, editing, drawing, etc. of a dimensional figure, a coordinate system setting unit that sets a coordinate system in a three-dimensional space and a size of a grid in the coordinate system;
A cursor control unit that controls displaying the area instruction position instructed by the human-powered instruction device on the display screen as a cursor, and the coordinate system setting including the area instruction position displayed as a cursor on the display screen under the control of the cursor control unit. and a volume element calculation unit that calculates a volume element having a shape based on the coordinate system and grid size set by the unit as a three-dimensional region to be pointed.

[Effect]

In the three-dimensional area designation method of the present invention, the coordinate system setting unit sets the coordinate system in the three-dimensional space and the size of the grid in the coordinate system, and the cursor control unit moves the cursor to the area designation position specified by the human-powered pointing device. The volume element calculation unit controls the coordinate system and grid size set by the coordinate system setting unit, including the N area indicated position displayed as a cursor on the display screen under the control of the cursor control unit. Based on (the shape of the volume element is defined as the three-dimensional region of the reference object).

〔Example) Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of one embodiment of the three-dimensional AM instruction method of the present invention.
The Il instruction method is realized on a workstation in an information processing system that performs generation, editing, drawing, etc. of three-dimensional figures in a three-dimensional space, and is based on instructions from the input instruction device 5 to create a coordinate system (orthogonal coordinate system) in the three-dimensional space. a coordinate system setting unit 1 that sets the size of the grid (coordinate system dependent grid J as shown in FIG. , a display control unit 2 that controls drawing of figures on a display screen 4, display of a cursor, etc., an area instruction unit 3 that instructs a three-dimensional area in a three-dimensional space, and drawing of three-dimensional figures, etc. It is configured to include a display screen 4 and an input instruction device 5 realized by a dial box, a keyboard, etc. (in this embodiment, it is assumed to be realized by a dial box).

The area instruction unit 3 includes an input instruction device control unit 31 that controls instructions from the input instruction device 5, and a cursor that controls displaying the area instruction position instructed by the input instruction device 5 on the display screen 4 as a cursor. Lattice point data based on the coordinate system and grid size introduced into the three-dimensional space by the control unit 32 and the settings by the coordinate system setting unit 1 (data indicating the coordinate values of the grid points, which are points for specifying the grid) )
The lattice point management unit 33 manages the lattice point management unit 33 and the cursor control unit 32 controls the volume element (3 surrounded by lattice points
dimensional area) as a three-dimensional sI area to be referred to.

FIGS. 2(a) to 2(C) are diagrams for explaining the manner in which a three-dimensional area is designated for a three-dimensional figure G that has already been generated and drawn on the display screen 4. . Here, a case is shown in which a cylindrical coordinate system is introduced into the three-dimensional space (the elements of the cylindrical coordinate system are (r, θ, 2)).

Referring to FIG. 2(a), when a drawing method is adopted in which a three-dimensional space is represented by two two-dimensional cross-sectional views, a cross-sectional view r in the r-θ direction is displayed on the display screen 4. −
A θ cross-sectional view 21 and an r-z cross-sectional view 22 which is a cross-sectional view in the rz direction are drawn.

Referring to FIG. 2(b), the dial box realizing the input instruction device 5 includes a dial 23 for indicating the r coordinate in the r-θ sectional view 21, and a dial 23 for indicating the θ coordinate in the r-θ sectional view 21. 24, a dial 25 that indicates the r coordinate in the rz cross-sectional view 22, and a dial 26 that indicates the two coordinates in the rz cross-sectional view 22.

FIG. 2(C) shows a volume element that is a three-dimensional area designated for a three-dimensional figure G drawn on the display screen 4 when a drawing method that three-dimensionally expresses a three-dimensional space is adopted. FIG.

Next, the operation of the three-dimensional area designation method of this embodiment configured as described above will be explained. Note that here, the volume element V including the point P(rO, θ0.zO) of the area designated position is 3
The operation when specifying as a dimensional area will be explained.

The coordinate system setting section 1 sets the coordinate system and the size of the grid in the coordinate system according to instructions from the user from the input instruction device 5, and sets the grid point data based on the settings to the grid points in the area specifying section 3. The management section 33 manages the information. Since the coordinate system and the size of the grid can be made variable in this way, it is possible to make the shape of the three-dimensional region of the pointing object variable.

It is assumed that a three-dimensional figure G is generated in a three-dimensional space in which a coordinate system is set in this way, and a three-dimensional area is specified for the three-dimensional figure G.

In this case, the user operates the dials 23 and 24 on the input instruction device 5 while referring to the r-θ sectional view 21 shown in FIG. 2(a) on the display screen 4, and The dials 25 and 26 on the input instruction device 5 are operated while referring to the second cross-sectional view 22 to specify the coordinate values (ro, θO, zO) of the point P at the area instruction position.

The input instruction device control section 31 in the area instruction section 3 recognizes the amount of variation in the operation of each dial 23 to 26 and obtains a coordinate value (rO9θ0.zO).

The cursor control unit 32 controls this coordinate value (rO, θ0, z
O), r-θ sectional view 21 and r-2 sectional view 2
(ro, θ0) and (r
Display the cursor at the position O,z O).

By referring to the lattice point management section 33 that manages the lattice point data set by the coordinate system setting section 1, the volume element summer section 34 calculates rl<ro<r2. θ1〈θ0〈θ2゜21＜20
Lattice point data rl, r2 . θ1. θ2゜z
Calculate l and z2.

However, the lattice point data "1" is the largest among the set of lattice point data r1' that satisfies rl'≦rQ, and the lattice point data r2 is the lattice point data r2' that satisfies rO<r2'.
is the smallest in the set of . The lattice point data θ1 and θ2 and zl and z2 are also obtained using the same concept.

The grid point data rl calculated as described above.

r2. θ1. θ2. By z1 and z2, the coordinate value (r
A volume element V including a point ptti area indicated position) having O2θO, zO) is determined as a three-dimensional region of the indicated object. That is, the volume element V has the following value.

V=((ro, θO, zO); rl≦rQ<r2゜θ1
≦θ0〈θ2. z1≦go<z2) The display control unit 2 draws a volume element V, which is a three-dimensional area to be pointed on, on the display screen 4 using a three-dimensional drawing method (see FIG. 2(C)).

Note that the coordinate system setting unit 1 can also set a coordinate system other than the cylindrical coordinate system as described above. In this case, for example, if an XYZ orthogonal coordinate system is set, as shown in Figure 2 (a)
An X-Y cross-sectional view and a Y-2 cross-sectional view are drawn on the display screen 4 instead of the r-θ cross-sectional view 21 and the r-z cross-sectional view 22 in the middle, and a region designation in three-dimensional space is provided for each of them. A cursor is displayed that displays X-Y coordinate values and Y-Z coordinate values indicating a point at a position, and a predetermined three-dimensional area (in this case, a rectangular parallelepiped area) is indicated.

〔Effect of the invention〕

As described above, the present invention relates to a coordinate system setting section.

By providing a cursor control unit and a volume element calculation unit, it is possible to specify a three-dimensional area with the same ease and accuracy as inputting the coordinates of a single point, thereby increasing the operational efficiency of specifying a three-dimensional area. It has the effect of being able to improve.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIGS. 2 (a> to (C)) are for explaining the mode of specifying a three-dimensional area by the three-dimensional area specifying method shown in FIG. FIG. 3 is a diagram showing an example of a mode of specifying a three-dimensional area by the conventional three-dimensional area specifying method. In the figure, 1...coordinate system setting section, 2... Display control unit, 3... Area instruction unit, 4... Display screen, 5... Input instruction device, 21... r-θ sectional view, 22... r -2 sectional view, 23 to 26 Dial, 31 Input instruction device control unit, 32 Cursor control unit, 33 Lattice point management unit, 34 Volume element calculation unit It is.

Claims (1)

[Claims] An information processing system that generates, edits, draws, etc. three-dimensional figures in a three-dimensional space, comprising: a coordinate system setting unit that sets a coordinate system in the three-dimensional space and the size of a grid in the coordinate system; , a cursor control unit that controls displaying the area instruction position instructed by the input instruction device on the display screen as a cursor; and the coordinate system including the area instruction position displayed as a cursor on the display screen under the control of the cursor control unit. A three-dimensional area specifying method, comprising: a volume element calculation unit that calculates a volume element having a shape based on a coordinate system and a grid size set by a setting unit as a three-dimensional area of an instruction target.