JPH0944700A - Method for three-dimensionally expressing swinging object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To express a natural swinging motion by an object pattern by displaying the object of a swinging object so that a supporting point many not be deviated, changing a magnification ratio or a reduction ratio in a direction and three-dimensionally expressing the swinging object. SOLUTION: An object A of a fin fixes the location of a supporting point B and the reduction ratios of left and right sides are changed. Namely, (a) shows that the object A of the fin of a character ROM is displayed by fixing the location of the supporting point B at the reduction ratio of 100%, and (b) shows that the object A of the fin is displayed by fixing the location of the supporting point B at the reduction ratio of 50%. Further, (c) shows that the object A of the fin is displayed by fixing the location of the supporting point B at the reduction ratio of 25%. Because a more natural movement can be made by delaying the change of the reduction ratios at the time of the maximum and minimum, it is desirable that the reduction ratios are changed in a sine wave shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for three-dimensionally representing an oscillating object suitable for a video game machine.

[0002]

2. Description of the Related Art In a conventional video game machine, when a rocking object such as a fin of a fish is three-dimensionally represented, a large number of patterns are prepared as objects and these patterns are switched.

[0003]

However, in the conventional method, a large number of patterns must be prepared, and a huge number of patterns must be prepared in order to express a natural swinging motion. There was a flaw.

The present invention has been made in view of the above problems, and an object of the present invention is to express a natural swinging motion with one object pattern.

[0005]

In order to achieve this object, a method of three-dimensionally expressing an oscillating object of the present invention is to display an object of the oscillating object in such a manner that its fulcrum is not displaced and to display the object in one direction. By changing the enlargement ratio or the reduction ratio, the rocking object is three-dimensionally expressed.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block connection diagram showing an embodiment of a method for three-dimensionally expressing an oscillating object according to the present invention.

In FIG. 1, the result of operation of a button or the like by a game player is detected by the operation unit 1,
It is supplied to the CPU circuit 2. CPU circuit 2 is OBJ
A command is transmitted to the (object) circuit 3 and the BG (background) circuit 4 to generate an image to be displayed.
By writing the generated image signal in the synthesizing unit 5, it is output to the external CRT device 6 and displayed as a visible image.
The game player operates a button or the like of the operation unit 1 while watching the visible image to progress the game. In addition, CPU
A fulcrum designating section 2a and a zoom speed designating section 2b are provided in the circuit 2. In addition, in the OBJ circuit 3,
A zoom circuit 3d is provided.

2 and 3 are conceptual diagrams for explaining an example in which the present invention is applied to the case of expressing the movement of a fin of a fish. FIG. 2 is a conceptual diagram showing a fish fin object A, which is a character ROM 3b.
Is stored in As shown in FIG. 3, the fin object A has a fixed fulcrum B position, and the left and right reduction ratios are changed. That is, FIG. 3A shows a character ROM
The fin object A stored in 3b is set to 100
The position of the fulcrum B is fixed and displayed at a reduction ratio of%. In addition, in FIG. 3B, the fin object A is 50
The position of the fulcrum B is fixed and displayed at a reduction ratio of%. Further, in FIG. 3C, the fin object A is 25
The position of the fulcrum B is fixed and displayed at a reduction ratio of%.

The fulcrum designating section 2a of the CPU circuit 2 is
The position of the fulcrum B is fixed and displayed. In addition, the CPU circuit 2
The zoom speed designation unit 2b controls the speed at which the reduction ratio changes.

The relationship between these reduction ratios and time is shown in FIG. That is, FIG. 4A shows a case where the reduction rate is changed in a triangular wave shape, and FIG. 4B shows a case where the reduction rate is changed in a sine wave shape. It is preferable to change the reduction rate in a sinusoidal manner as shown in FIG. 4B, because a more natural movement can be obtained by delaying the change in the reduction rate at the maximum and minimum.

In the embodiment, a fish fin is used as an example.
The present invention can also be applied to expressing rocking objects such as butterfly wings, flower petals, and shells.

[0013]

As described above, according to the method of three-dimensionally expressing an oscillating object of the present invention, the object of the oscillating object is displayed so that the fulcrum is not displaced, and the enlargement or reduction ratio is set in one direction. Since the rocking object is three-dimensionally represented by changing the, the natural rocking motion can be represented by one object pattern.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing an embodiment of a method for three-dimensionally expressing a rocking object according to the present invention.

FIG. 2 is a conceptual diagram showing an embodiment of a method for three-dimensionally expressing a rocking object according to the present invention.

FIG. 3 is a conceptual diagram showing an embodiment of a method for three-dimensionally expressing a rocking object according to the present invention.

FIG. 4 is a characteristic diagram showing an embodiment of a method for three-dimensionally expressing a rocking object according to the present invention.

[Explanation of symbols]

 1 Operation Section 2 CPU Circuit 2a Support Point Designation Section 2b Zoom Speed Designation Section 3 OBJ (Object) Circuit 3d Zoom Circuit 4 BG (Background) Circuit 5 Compositing Section 6 CRT Device

Claims (3)

[Claims] 1. A method of stereoscopically representing an oscillating object by displaying an object of the oscillating object such that the fulcrum is not displaced and changing the enlargement ratio or reduction ratio in one direction. 2. The method for stereoscopically representing an oscillating object according to claim 1, wherein the changing speed of the enlargement ratio or the reduction ratio is slowed at maximum and minimum of the object. 3. The method according to claim 1, wherein the one direction is a left-right direction.