JP4098574B2 - Image processing program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image processing program.
[0002]
[Prior art]
When the 3D model is displayed on the screen, for example, if the 3D model is formed of polygons, the position of the camera can be calculated by performing rotation, movement calculation, shading calculation for the light source, perspective transformation calculation, etc. It is possible to generate an image of a three-dimensional model viewed from the above. Further, when a texture is pasted on the three-dimensional model, a texture mapping process calculation is also performed.
[0003]
Recently, processing for displaying a three-dimensional model on a screen, that is, rotation, movement calculation, shading calculation, perspective transformation calculation, texture mapping processing calculation and the like of the polygon are performed by hardware. As a result, it is possible to obtain an effect that these calculation processes can be executed much faster than software, and a model using more polygons and more models can be displayed on the screen. The effect is obtained.
[0004]
[Problems to be solved by the invention]
However, in order to generate a plurality of three-dimensional models and display them on the screen, the above calculation must be performed for each model, and the time required for this increases as the number of models to be generated and displayed increases. The calculation cost is large. Particularly in the real-time CG field, when one frame is drawn in 1/60 seconds, the plurality of three-dimensional models must be generated in a time much shorter than 1/60 seconds.
[0005]
The present invention has been made in consideration of such points, and in a virtual space that requires the arrangement of a plurality of three-dimensional models, a pseudo three-dimensional model that is recognized as a three-dimensional model is replaced with a three-dimensional model. An object is to provide an image processing program to be arranged instead.
[0006]
[Means for Solving the Problems]
In order to achieve the object of the present invention, for example, an image processing program of the present invention comprises the following arrangement.
[0007]
That is, an image processing program for causing a computer to execute image processing,
An image generation step of generating an image of the three-dimensional model that can be seen from a camera having the same position and posture as the player's viewpoint using data indicating the three-dimensional model;
A polygon having a size including the three-dimensional model as viewed from a predetermined direction, paste the image generated by the image generating step as a texture image, and a pseudo three-dimensional model generating step of generating a pseudo three-dimensional model ,
A plurality of pseudo three-dimensional models generated in the pseudo three-dimensional model generation step are copied, and an arrangement step of arranging each of the pseudo three-dimensional models at predetermined positions in the virtual space is executed by a computer.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
[First Embodiment]
The image processing program of this embodiment displays a plurality of three-dimensional models in a game screen in a game in the field of real-time CG. The image processing program will be described below.
[0009]
FIG. 1 shows a basic configuration of an image processing apparatus that executes an image processing program in the present embodiment. FIG. 1 is a block diagram showing a basic configuration of an image processing apparatus according to this embodiment.
[0010]
A CPU 101 controls the entire apparatus using programs and data stored in the RAM 103 and the ROM 102 and performs various image processing described later. A ROM 102 stores programs and setting data for controlling the entire apparatus. Reference numeral 103 denotes a RAM, an area (not shown) for storing model data 106a, texture data 106b, and image processing program 106c read from the external storage device 106, and a work area (not shown) used when the CPU 101 executes various processes. And an area 103a for storing a two-dimensional image generated by the CPU 101 and viewed from the position of the camera (which is formed by polygons in the present embodiment, but is not limited to this). Is provided. Reference numeral 104 denotes a VRAM, and a screen to be finally displayed is written in the VRAM 104, so that this screen is displayed on the display unit 105.
[0011]
A display unit 105 includes a CRT, a liquid crystal screen, and the like, and an external storage device 106 such as a hard disk stores model data 106a, texture data 106b, and an image processing program 106c described later. The model data 106a is geometric information data of a three-dimensional model to be displayed, and includes vertex coordinates, normal vector components, attributes, and the like of each polygon forming the three-dimensional model. The texture data 106b is data of a two-dimensional image (texture) to be pasted on the three-dimensional model, and the read texture is pasted at a desired position on the model by a known texture mapping method. Note that the above model data 106a, texture data 106b, and image processing program 106c may be stored in a storage medium such as a CD-ROM and read out to the apparatus by a drive device such as a CD-ROM drive.
[0012]
An operation unit 107 includes a keyboard, a mouse, a pointing device such as a game pad and a joystick, and can input various instructions to the apparatus. Reference numeral 108 denotes a bus connecting the above-described units.
[0013]
The image processing apparatus having the above configuration includes a general personal computer, a workstation, a game machine, and the like.
[0014]
Next, processing performed when the image processing apparatus having the above configuration executes the image processing program according to the present embodiment will be described with reference to FIGS. 2A and 2B. FIG. 2A shows a three-dimensional model 201 used to generate a plurality of pseudo three-dimensional models (details will be described later) arranged in the game field, and FIG. 2B shows a plurality of pseudo three-dimensional models arranged in the game field. It is explanatory drawing explaining the process until it displays the game screen by which a three-dimensional model is arrange | positioned. Here, the pseudo three-dimensional model is a two-dimensional image whose appearance changes according to the position and orientation of the camera (that is, it appears as a three-dimensional model on the game screen). Hereinafter, it is referred to as a pseudo three-dimensional model. Hereinafter, an image processing program for generating the pseudo three-dimensional model will be described.
[0015]
In FIG. 2B, first, data necessary for generating the three-dimensional model 201 from the model data 106 a and the texture data 106 b stored in the external storage device 106 is read out to an area in the RAM 302. Then, using the read model data and texture data of the three-dimensional model 201, when the CPU 101 assumes that the three-dimensional model 201 is at a reference position (details will be described later), a camera ( An image (model image) of the three-dimensional model 201 that can be seen from the camera (second camera) having the same position and orientation as the player viewpoint (first camera) is generated by a known method and provided in the RAM 103. The image is drawn in the memory 103a.
[0016]
Although the first camera and the second camera have the same relative position and orientation with respect to the three-dimensional model 201, the second camera is virtually provided to generate the model image. Camera. For convenience of explanation, a camera (first camera) in the game is distinguished from a camera (second camera) for generating a model image, but the three-dimensional model viewed from the first camera is used. Since the image 201 and the image of the three-dimensional model 201 viewed from the second camera are the same, the image of the three-dimensional model 201 by the first camera may be used as the model image. In the present embodiment, the reference position is the center of gravity of each position where the pseudo three-dimensional model is arranged, but is not limited to this.
[0017]
FIG. 4 shows the relationship between the first camera and the reference position. Reference numeral 400 denotes a first camera, which shows the viewpoint of the player in the game. 401a, 401b, and 401c all indicate pseudo three-dimensional models. Although the number of pseudo three-dimensional models to be arranged is 3 in the figure, it is not limited to this. Moreover, it is not limited to this arrangement. In the case of the figure, the reference position 402 is the position of the center of gravity of each position of the pseudo three-dimensional models 401a, 401b, 401c.
[0018]
Returning to FIG. 2B, when the model 201 is next viewed from the front, a polygon 202 having a size including the model 201 is generated, and the generated model image is pasted on the polygon as a texture image, and the pseudo three-dimensional Generate a model. Since this model image is an image of the model 201 having a size that can be seen from the second camera when the model 201 is at the reference position, it may be different from the size of the polygon. Therefore, it is necessary to adjust the size of the model image to match the size of the polygon. As can be seen from the above description, this pseudo three-dimensional model is a single polygon with a model image pasted thereon, so that the processing load for generating a plurality is lighter than the load for generating a plurality of three-dimensional models 201. .
[0019]
Then, the generated pseudo three-dimensional model is copied as much as necessary, and each pseudo three-dimensional model is arranged at a position where it should originally be arranged in the game field. All the polygons representing the pseudo three-dimensional model are inclined so as to face the front (the surface on which the model image is pasted) with respect to the first camera. By doing so, the front of all the pseudo three-dimensional models, that is, model images can be viewed from the first camera. FIG. 3 shows a game screen as a result of the above processing.
[0020]
Further, the above process, that is, the process shown in FIG. 2B is performed for each frame. As a result, a pseudo three-dimensional model is generated according to the position and orientation relationship between the first camera and the reference position, so that the pseudo three-dimensional model viewed from the first camera is a three-dimensional element having three-dimensional elements. Looks like a model.
[0021]
A flowchart of the above image processing program is shown in FIG. Note that the program (image processing program in the present embodiment) according to the flowchart shown in the figure is executed as a subroutine from the program of the game main body.
[0022]
First, the model image is generated (step S501). Next, a polygon having a size included when the three-dimensional model is viewed from the front is generated (step S502), and the model image generated in step S501 is pasted on the polygon to generate a pseudo three-dimensional model (step S503). . Then, the generated pseudo three-dimensional model is arranged at a predetermined position (step S504), and when the arrangement of all the pseudo three-dimensional models is finished, the process returns to the game main body program.
[0023]
Further, when displaying as a three-dimensional model, an image of the three-dimensional model viewed from the first camera may be generated as usual and drawn in an area different from the area 103 a in the RAM 103.
[0024]
As described above, the image processing program according to the present embodiment is a pseudo-3 whose appearance changes according to the position and orientation relationship with the first camera, particularly when a plurality of three-dimensional models are generated and displayed in the real-time CG. Generate a 3D model, copy multiple pseudo 3D models and place them in the field, and display the screen faster without imposing a load on the computer than creating and displaying multiple 3D models Can do.
[0025]
In the image processing apparatus according to the present embodiment, the CPU 101 performs a calculation process for generating a three-dimensional model. However, the present invention is not limited to this. And may be displayed on the display unit 105.
[0026]
[Second Embodiment]
In addition, by making the size of the area 103a smaller than the size of the area for drawing the 3D model, the speed of drawing the pseudo 3D model is increased, and it is faster and without applying a load by the computer. A plurality of pseudo three-dimensional models can be generated and displayed.
[0027]
[Third Embodiment]
In the first embodiment, as the reference position, the center of gravity position of each position where the pseudo three-dimensional model is arranged is used. However, for example, the reference point position of the first camera may be used.
[0028]
[Fourth Embodiment]
The above processing (for example, processing according to part or all of the flowchart shown in FIG. 5) is stored as a program in a storage medium such as a CD-R, ROM, DVD-ROM, or MO, and stored in this storage medium. This computer can perform the above processing by causing the computer to read (install or copy) the program. Therefore, it is obvious that this storage medium is also within the scope of the present invention.
[0029]
The image processing described in the above embodiment can also be realized by an image processing apparatus having the following configuration. That is, a storage unit that stores data indicating a three-dimensional model, and a camera that uses the data indicating the three-dimensional model stored in the storage unit to have a predetermined relationship between the position and orientation of the three-dimensional model. An image generating means for generating an image of a three-dimensional model visible from the image, and a pseudo three-dimensional model by pasting the image generated by the image generating means on a polygon having a size including the three-dimensional model when viewed from a predetermined direction The image processing apparatus includes: a pseudo three-dimensional model generation unit that generates a plurality of copies; and an arrangement unit that copies a plurality of pseudo three-dimensional models generated by the pseudo three-dimensional model generation unit and arranges them at predetermined positions in a virtual space. Since the series of processes described in the embodiments can be performed, it is clear that an apparatus having the above configuration is within the scope of the present invention.
[0030]
【The invention's effect】
As described above, according to the present invention, a pseudo three-dimensional model that can be recognized as a three-dimensional model can be arranged instead of a three-dimensional model in a virtual space that requires arrangement of a plurality of three-dimensional models.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a basic configuration of an image processing apparatus according to an embodiment of the present invention.
FIG. 2A is a diagram showing a three-dimensional model used to generate a plurality of pseudo three-dimensional models arranged in a game field.
FIG. 2B is an explanatory diagram for explaining processing until a plurality of pseudo three-dimensional models are arranged in a game field and a game screen on which a plurality of pseudo three-dimensional models are arranged is displayed.
FIG. 3 is a diagram showing a game screen of the processing result shown in FIG. 2B.
FIG. 4 is a diagram illustrating a relationship between a first camera and a reference position.
FIG. 5 is a flowchart of an image processing program according to the first embodiment of the present invention.

Claims (5)

An image processing program for causing a computer to execute image processing,
An image generation step of generating an image of the three-dimensional model that can be seen from a camera having the same position and posture as the player's viewpoint using data indicating the three-dimensional model;
A polygon having a size including the three-dimensional model as viewed from a predetermined direction, paste the image generated by the image generating step as a texture image, and a pseudo three-dimensional model generating step of generating a pseudo three-dimensional model ,
An image processing program for causing a computer to execute a plurality of copies of the pseudo three-dimensional model generated in the pseudo three-dimensional model generation step and to arrange each of the pseudo three-dimensional models at predetermined positions in a virtual space.   The image processing program according to claim 1, wherein in the image generation step, an image of a three-dimensional model located at a reference position visible from the camera is generated.   The image processing program according to claim 2, wherein the reference position is a gravity center position of each position where the pseudo three-dimensional model is arranged. The reference position is the image processing program according to claim 2, characterized in that the fixation point position of the camera. 5. The placement step further includes tilting the pseudo 3D model so that an image plane pasted in the placed pseudo 3D model can be seen from a player's viewpoint. The image processing program described in 1.

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