JPH04326114A - Three-dimensional coordinate value input system - Google Patents

Abstract

PURPOSE:To facilitate operation for indicating a specific position in a three- dimensional space of a field of three-dimensional computer graphics. CONSTITUTION:An input coordinate processing part 1 inputs a combination of two-dimensional coordinate values from an input device 5. A three- dimensional coordinate conversion processing part 2 converts the combination of two-dimensional coordinate values, inputted to the input coordinate processing part 1, into three-dimensional coordinate values. A cursor display processing part 3 displays a three-dimensional cross-hair cursor on the display screen of an output device 6 according to the three-dimensional coordinate values converted by the three-dimensional coordinate value conversion processing part 2. A coordinate output processing part 4 outputs the three-dimensional coordinate values specified at the position of the three-dimensional cross-hair cursor at the point of time of when a three-dimensional coordinate value acquisition request is made.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to the field of three-dimensional computer graphics, and in particular, three-dimensional coordinate value input for visually determining and inputting coordinate values (three-dimensional coordinate values) in three-dimensional space. Regarding the method.

0002

[Prior Art] Conventionally, in this type of three-dimensional coordinate value input method, a three-dimensional space is expressed by a plurality of two-dimensional planes on the display screen of an output device, and a cursor (two-dimensional crosshair cursor) on each two-dimensional plane is used. etc.), three-dimensional coordinate values were input according to instructions.

0003

[Problems to be Solved by the Invention] In the conventional three-dimensional coordinate value input method described above, three-dimensional coordinate values are input by instructions using a cursor on a plurality of two-dimensional planes.
This method has the disadvantage that it is difficult to understand the three-dimensional coordinate values of the input object three-dimensionally, and it is difficult for the operator to input the three-dimensional coordinate values (operation to specify a specific position in three-dimensional space).

[0004] In view of the above-mentioned points, an object of the present invention is to display a three-dimensional crosshair cursor on a display screen to facilitate input of three-dimensional coordinate values to specify a specific position in three-dimensional space. The goal is to provide a method.

[0005]

[Means for Solving the Problems] The three-dimensional coordinate value input method of the present invention includes an input coordinate processing unit that inputs a combination of two-dimensional coordinate values from an input device, and two-dimensional coordinates input by the input coordinate processing unit. A three-dimensional coordinate conversion processing unit that converts a combination of values into three-dimensional coordinate values, and a three-dimensional crosshair cursor is displayed on the display screen of the output device based on the three-dimensional coordinate values converted by this three-dimensional coordinate conversion processing unit. and a coordinate output processing section that outputs a three-dimensional coordinate value specified by the position of the three-dimensional crosshair cursor at the time when a three-dimensional coordinate value acquisition request is input.

[0006]

[Operation] In the three-dimensional coordinate value input method of the present invention, the input coordinate processing section inputs a combination of two-dimensional coordinate values from the input device,
The three-dimensional coordinate conversion processing section converts the combination of two-dimensional coordinate values input by the input coordinate processing section into three-dimensional coordinate values, and the cursor display processing section converts the combination of two-dimensional coordinate values input by the input coordinate processing section into the three-dimensional coordinate values converted by the three-dimensional coordinate conversion processing section. based on the three-dimensional crosshair cursor is displayed on the display screen of the output device, and the coordinate output processing unit outputs the three-dimensional coordinate value specified by the position of the three-dimensional crosshair cursor at the time when the three-dimensional coordinate value acquisition request is input. .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the three-dimensional coordinate value input method of the present invention. The three-dimensional coordinate value input method of this embodiment consists of an input coordinate processing section 1 that inputs a combination of two-dimensional coordinate values for determining three-dimensional coordinate values from an input device 5; A three-dimensional coordinate conversion processing unit 2 that receives a combination of values and converts the combination of two-dimensional coordinate values into three-dimensional coordinate values, and a device that receives three-dimensional coordinate values from the three-dimensional coordinate conversion processing unit 2 and outputs a three-dimensional crosshair cursor. 6 and the position of the three-dimensional crosshair cursor at the time when a three-dimensional coordinate value acquisition request (a request realized by a trigger signal, etc.) is input from an application program (not shown). The three-dimensional coordinate value specified by (the three-dimensional coordinate value determined by the position of the currently displayed three-dimensional crosshair cursor) is received from the three-dimensional coordinate conversion processing unit 2, and the three-dimensional coordinate value is converted to the application program (
An input device 5 realized by a mouse or the like, and a CRT (Cathode R
ay Tube) and an output device 6 realized by a display device or the like.

FIG. 2 is a diagram showing a three-dimensional crosshair cursor displayed on the display screen of the output device 6. As shown in FIG. A three-dimensional crosshair cursor is a line segment of a certain length (X-line segment, Y-line segment) parallel to each coordinate axis (X-axis, Y-axis, and Z-axis) in a three-dimensional space projected on the display screen of the output device 6. This is a cursor that determines the three-dimensional coordinate value by the intersection of the Z line segment and the Z line segment.

FIGS. 3A and 3B show specific examples of how a three-dimensional crosshair cursor is moved (moved on the display screen of the output device 6) by inputting a combination of two-dimensional coordinate values from the input device 5. FIG. It is assumed here that the input device 5 is a mouse, and input of a combination of two-dimensional coordinate values by the input device 5 is realized by a movement operation of the mouse.

As shown in FIG. 3(a), when the mouse (input device 5) is moved without pressing the button, the intersection of the three-dimensional crosshair cursor (X-line segment, Y-line segment, The intersection point of the Z line segment) moves on the X-Y plane in three-dimensional space. For example, as shown in the figure, when you move the mouse to the left, the intersection point moves to the left on the X-ray segment (note that
If you move the mouse back and forth (up and down in the figure) in the state shown in the figure, the intersection will move on the Y line segment).

Furthermore, as shown in FIG. 3(b), if the mouse is moved while holding down any mouse button, the intersection of the three-dimensional crosshair cursor moves in the Z-axis direction of the three-dimensional space. do. For example, as shown in the figure, if you move the mouse forward with the button pressed, the intersection point will be Z.
Move forward on the line segment.

[0013] By such movement of the intersection point, the ratio (division ratio) at which the X-line segment, Y-line segment, and Z-line segment of fixed length are divided at the intersection point changes.

By moving the three-dimensional crosshair cursor as described above, in the field of three-dimensional computer graphics, it becomes possible to input three-dimensional coordinate values while capturing a three-dimensional image.

Next, the operation of the three-dimensional coordinate value input method of this embodiment configured as described above will be explained.

The input coordinate processing section 1 inputs a combination of two-dimensional coordinate values from the input device 5 based on an operation by an operator. A combination of two-dimensional coordinate values is information that specifies one of the two-dimensional planes that make up a three-dimensional space (it may also be information that specifies a one-dimensional line segment, as in the case shown in Figure 3(b)).
, and information indicating the amount and direction of movement in the two-dimensional plane.

Furthermore, the input coordinate processing section 1 passes the input combination of two-dimensional coordinate values to the three-dimensional coordinate transformation processing section 2.

The three-dimensional coordinate conversion processing unit 2 receives a combination of two-dimensional coordinate values from the input coordinate processing unit 1, and converts the combination of two-dimensional coordinate values into three-dimensional coordinate values (the amount and direction of movement of the three-dimensional crosshair cursor). data),
The three-dimensional coordinate values are passed to the cursor display processing section 3 and the coordinate output processing section 4.

The cursor display processing section 3 receives the three-dimensional coordinate values from the three-dimensional coordinate conversion processing section 2, and determines the position of the three-dimensional crosshair cursor (each line segment of the three-dimensional crosshair cursor (X-ray minute, Y line segment and Z
The position of the line segment) is determined, and a three-dimensional crosshair cursor is displayed at that position on the display screen of the output device 6.

The coordinate output processing unit 4 outputs a three-dimensional crosshair specified by the three-dimensional coordinate values received from the three-dimensional coordinate conversion processing unit 2 at the time when a three-dimensional coordinate value acquisition request (trigger signal) is input from the application program. Returns (outputs) the three-dimensional coordinate value of the cursor intersection to the application program.

Through the above processing, the dividing ratio of each line segment of the three-dimensional crosshair cursor can be changed according to the input from the input device 5, and the three-dimensional crosshair cursor can be dynamically displayed on the display screen of the output device 6. This makes it possible to easily specify a specific position in three-dimensional space (the position indicated by the intersection of the three-dimensional crosshair cursor).

[0022]

Effects of the Invention As explained above, the present invention provides a three-dimensional This has the effect of making it easier to specify a specific position in a three-dimensional space in the field of computer graphics.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a three-dimensional crosshair cursor applied to the three-dimensional coordinate value input method shown in FIG. 1;

FIG. 3 is a diagram showing a specific example of a mode of movement of a three-dimensional crosshair cursor applied to the three-dimensional coordinate value input method shown in FIG. 1;

[Explanation of symbols]

1 Input coordinate processing section 2 Three-dimensional coordinate conversion processing section 3 Cursor display processing section 4 Coordinate output processing section 5 Input device 6 Output device

Claims (1)

[Claims] 1. An input coordinate processing unit that inputs a combination of two-dimensional coordinate values from an input device, and a three-dimensional coordinate transformation that converts the combination of two-dimensional coordinate values input by the input coordinate processing unit into three-dimensional coordinate values. A processing unit, a cursor display processing unit that displays a three-dimensional crosshair cursor on the display screen of the output device based on the three-dimensional coordinate values converted by the three-dimensional coordinate conversion processing unit, and a three-dimensional coordinate value acquisition request is input. A three-dimensional coordinate value input method comprising: a coordinate output processing unit that outputs a three-dimensional coordinate value specified by the position of a three-dimensional crosshair cursor at the time when the three-dimensional crosshair cursor is located.