JP2001195609A - Display changing method for cg - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it easy to grasp the positions of a player and an operator at the time of display switching by smoothly performing switching between a three-dimensional display image and a two-dimensional display image when a map is displayed. SOLUTION: When displaying at a display position, an image obtained by photographing a stereoscopic video arranged on 3D-displayed coordinates with an imaginarily provided camera, the tilt of the direction of the camera to the vertical line of a two-dimensional coordinate system is detected and a 3D display is made when the tilt is equal to or larger than a specified angle or a 2D display is made when not. Those displays are actualized seamlessly by extending single operation to accurately grasp position relation in the 2D-3D display switching.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for switching between three-dimensional display and two-dimensional display in computer graphics display.

[0002]

2. Description of the Related Art In a simulation game for developing a city or a simulation program for actual city planning, buildings and transportation means are arranged by symbols and the like on a map (so-called map) expressed in a two-dimensional coordinate system. Later, an operation of converting the image into a three-dimensional stereoscopic image to grasp the concept is performed.

[0003] Switching between such a two-dimensional coordinate system image and a three-dimensional coordinate system image is realized by switching buttons on the operation pad or the like of a player or an operator. Is suddenly switched to the screen of the three-dimensional coordinate system, and it is not easy to grasp at which position the object exists on the screen of the three-dimensional coordinate system.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a point, and realizes a seamless (continuous) change of a display image from a three-dimensional display image to a two-dimensional display image. Accordingly, it is an object of the present invention to provide a technique that makes it very easy for a player or an operator to grasp a relationship between a position on a map and a stereoscopic image.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a three-dimensional display of a CG for displaying, on a display device, an image photographed by a camera virtually provided with a stereoscopic video arranged at coordinates displayed three-dimensionally, The inclination between the vertical line of the two-dimensional coordinate system and the direction of the camera is detected, and when the inclination is equal to or more than a certain angle, the image is displayed on a three-dimensional display image (3D display). When this happens, the image is displayed in a two-dimensional display image (2D).

[0006] Thus, according to the inclination of the camera, 3
By continuously performing the D display and the 2D display on the extension of the same operation, the switching operation between the 3D display and the 2D display by the operator or the player is greatly facilitated, and further, the 3D / 2D display is performed.
It is easy to grasp the position when the display is switched between.

[0007] The 3D display and the 2D display may be arranged so that the two images overlap each other near the boundary angle, or the 3D display image and the 2D display image are displayed at a predetermined ratio depending on the angle. You may combine and display.

Further, additional information such as a building name displayed on a map may be displayed as the 3D display approaches the 2D display. This technology can be realized as a computer program,
The program can be stored in optical or magnetic storage means, and specifically, a CD-ROM, CD,
It can be stored in a storage medium such as a DR, a CD-RW, a DVD, a magnetic disk, and a magnetic tape.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 is a block diagram illustrating the hardware configuration of the present embodiment.

The present embodiment is an example in which the present invention is applied to a video game device.
And a display device 60. Input device 51
Is constituted by a controller pad, a joystick, a mouse, or the like, and is constituted by a cross key capable of inputting a direction and some buttons. Specifically, the cross key functions as the gazing point operation unit 52 and the camera operation unit 53. In addition, each of these operation units 52 and 53
The functions may be assigned to the two cross keys,
A single cross key may be realized by switching the mode with another button. The input device 51 has a function of a camera / gazing point distance operation unit 54, and this function is also realized by a cross key or a button.

In this embodiment, the gazing point operating section 52 is not always necessary. However, by setting a gazing point on an object and moving the camera 1 equidistant from the gazing point around the gazing point. Thus, 2D display → 3D display centering on the object can be performed without losing the object in the captured image.

The game machine main body 55 is configured as a computer, and has a storage device 57, an arithmetic device 56, a drawing device 58, and a VRAM 59. Although not shown, a CD-ROM drive device is connected to the game machine main body 55, and a program is loaded from a CD-ROM mounted on the CD-ROM drive device and stored in the storage device 57. And the arithmetic unit 56
The image processing technology described below is realized by being read and executed.

The display device 60 is a CRT for a computer.
Alternatively, it is a general television receiver, and has a function of reproducing an NTSC signal or a video / audio signal output from the game machine main body 55.

FIG. 1 shows an image displayed on the display device 60 in a state in which the camera 1 is arranged at a substantially horizontal position with respect to the gazing point 101. FIG. 3 shows that the camera is arranged vertically above the gazing point 101. 7 is a display image on the display device 60 in a state of being turned on.

FIG. 2 is an explanatory view showing a state where the camera 1 moves from a horizontal position (a position displaying FIG. 1) to a vertically upper position (a position displaying FIG. 3). In the present embodiment, three objects A, B, and C are arranged on the map, and the point of regard 101 is set substantially at the center of these objects.

In this embodiment, when the camera 1 is at an angle of α2 or less with respect to the vertical direction, the additional display “A building”, “C building”, etc. for each object is displayed on the display screen. It has become.

Further, when the angle becomes smaller than or equal to α1, the degree of synthesis of the two-dimensional display image (2D) with the three-dimensional display image (3D) up to that point becomes high, and finally the vertical line substantially coincides with the vertical line. Sometimes, only the two-dimensional display image (2D) is displayed.

The calculation of new coordinate values based on the movement of the camera 1 around the gazing point 101 is performed as shown in FIG. In the figure, the camera 1 is moved by the cross key of the camera operation unit 53 of the input device 51 (the point of gaze 10
1), the amount of movement is represented by x-axis and y-axis.
The change in the axis and z-axis is converted into a rotation angle in radians (step 56a).

Next, the angles x, y, and z between the immediately preceding gazing point 101 and the camera 1 are read out from the storage device 57, and the above-described movement amount is added thereto (step 56b). Next, the composition ratio of the additional information is calculated from the angle between the gazing point 101 and the camera 1. Here, for example, in the examples of FIGS. 1 to 3, when the angle is equal to or smaller than α2, information such as “A building” and “C building” is displayed on the display image as additional information. In addition to the display of the additional information, the composition ratio of the two-dimensional display image (2D) facilitated by the storage device 57 to the three-dimensional display image (3D) is increased.

Then, the image of the additional information is read from the storage device 57 in accordance with the ratio determined as described above, and the composite value of this image is determined (step 56d). In this way, a composite image of the new three-dimensional display image (3D) and the two-dimensional display image (2D) at the determined camera position is displayed on the display device 60 (step 56e).

In the embodiment, the additional information such as the building name and the two-dimensional display image are separately stored in the storage device 57, and these are displayed according to the angle.
The additional information should be included in the two-dimensional display image,
The additional information may be gradually displayed as the synthesis ratio of the two-dimensional display image to the three-dimensional display image increases.

[0023]

According to the present invention, the change of the display image from the three-dimensional display image to the two-dimensional display image is realized seamlessly (continuously), so that the player or the operator simply extends a series of operations. The two-dimensional display image and the three-dimensional display image can be viewed, and it is extremely easy to grasp the positional relationship on the map and the positional relationship on the stereoscopic image.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a display image when a camera position is arranged at a substantially horizontal position with respect to a gazing point in an embodiment of the present invention.

FIG. 2 is a diagram illustrating a relationship between a movement trajectory of a camera position with respect to a gazing point and an angle of the camera with respect to a vertical line in the embodiment.

FIG. 3 is an explanatory diagram showing a display image when a camera position is arranged substantially vertically above a gazing point in the embodiment.

FIG. 4 is a block diagram showing an image processing procedure based on movement of a camera in the embodiment.

FIG. 5 is a block diagram showing a hardware configuration of the embodiment.

[Description of Signs] 1 Camera (position) 3 Display screen 51 Input device 52 Point-of-regard operation unit 53 Camera operation unit 54 Camera / point-of-regard distance operation unit 55 Game console main unit 56 Arithmetic device 57 Storage device 58 Drawing device 59 VRAM 60 Display Apparatus 101 Gaze point A, B, C Object

Claims (8)

[Claims] 1. A CG three-dimensional display method for displaying, on a display device, an image captured by a camera virtually provided with a three-dimensional image arranged at coordinates displayed three-dimensionally, comprising: Detecting a tilt between a line and the direction of the camera; performing a three-dimensional drawing when the tilt is equal to or more than a certain value; and performing a two-dimensional drawing when the tilt is within a certain range. CG display change method comprising: 2. The C according to claim 1, wherein the switching between the three-dimensional drawing and the two-dimensional drawing is performed while maintaining the operation state of a single operation unit for the camera.
G display change method. 3. The CG three-dimensional display method according to claim 1, further comprising the step of synthesizing a three-dimensional image and a two-dimensional image based on the ratio according to the inclination. 4. The CG display change method according to claim 2, wherein additional information depending on a predetermined coordinate position is displayed as the composition ratio of the two-dimensional drawing increases. 5. The CG three-dimensional display method according to claim 1, wherein the ratio of the additional information displayed is changed according to the tilt of the camera. 6. A step of setting a gazing point that the camera always looks at on the coordinates displayed three-dimensionally, moving the camera according to a specific rule around the set gazing point, Detecting the inclination between the vertical line of the two-dimensional coordinate system passing through the viewpoint and the direction of the camera; and performing two-dimensional drawing when the inclination is within a certain range. Performing a three-dimensional drawing in some cases. 7. An image generating apparatus for displaying, on a display device, an image taken by a camera virtually provided with a stereoscopic video arranged at three-dimensionally displayed coordinates, comprising: a vertical line in a two-dimensional coordinate system; Means for detecting a tilt with respect to the camera direction; means for performing three-dimensional drawing when the tilt is equal to or more than a certain value; and means for performing two-dimensional drawing when the tilt is within a certain range. Image generation device. 8. A CG display program for displaying, on a display device, an image captured by a camera virtually provided with a stereoscopic video arranged at coordinates displayed three-dimensionally, the program comprising: a vertical line in a two-dimensional coordinate system; Detecting a tilt with respect to the camera direction; performing a three-dimensional drawing when the tilt is equal to or more than a certain value; and performing a two-dimensional drawing when the tilt is within a certain range. A recording medium on which a program is recorded.