JPH0997350A - Method and device for information processing, and computer controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an operation for sticking a texture image on a polygon by automatically relating the position of a point specified in a polygon image to the position of a point specified in a texture source image including a necessary texture image. SOLUTION: A polygon specified as the sticking destination of a texture is extracted from a polygon image consisting of one or plural polygons and displayed as shown by the window 41. The texture source image including the texture image to be used is displayed as shown by the window 42. The respective vertexes of the polygon in the polygon image displayed in the window 41 and the corresponding points in the texture source image displayed in the window 42 are specified to obtain the texture image including the corresponding points, and position information on the corresponding points in the texture image is given to the respective vertexes specified in the polygon image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing method and apparatus for rendering a three-dimensional scene by computer graphics technology and a computer control apparatus.

[0002]

2. Description of the Related Art In drawing a three-dimensional scene by computer graphics, there is a method of expressing the shape of the surface by using polygons and drawing a texture image on the polygons to draw the pattern on the surface. The following method is generally known as such a method of acquiring a texture image used in computer graphics.

A portion used as a texture image is designated by a rectangle from the original texture image and cut out to prepare a texture image. Next, for each vertex of the polygon to which this texture image is attached, the corresponding position of the texture image is input. The texture image is pasted to the polygon based on the input position information.

[0004]

However, in the above conventional technique, since the texture image is cut out by the rectangle, when the shape of the pasting polygon is not a quadrangle, the position of each vertex is given to the polygon. It takes a lot of work. For example, the vertex a as shown in FIG.
The following procedure is required when pasting a part of a texture image cut out in a rectangle as shown in (b) to a polygon having h. That is, the vertices ah of the polygon (●
It is necessary to give the corresponding positions a ′ to h ′ (positions indicated by ●) in the texture image with the normalized coordinate values in the rectangle. Here, the normalized coordinates mean that each vertex of the rectangle is (0,
0), (1,0), (1,1), (0,1) are normalized coordinate values.

As described above, in the conventional method, the user inputs a position indicating each position on the texture image as a coordinate value with respect to each vertex on the polygon image, so that the operation is very troublesome.

The present invention has been made in view of the above problems, and automatically determines the position of a point specified on a polygon image and the position of a point specified on a texture original image including a necessary texture image. It is an object of the present invention to provide an information processing method and device that can be associated with each other and facilitate the operation of pasting a texture image on a polygon.

Further, according to the present invention, it is possible to interactively generate computer graphics data having a texture from an image in which the area of the polygon is appropriately contained in the image without facilitating the texture image matched with the polygon in advance. It is an object of the present invention to provide an information processing method and device that enable the above.

[0008]

An information processing apparatus of the present invention that achieves the above object has the following configuration. That is, first display means for displaying a polygon image composed of one or a plurality of polygons, second display means for displaying a texture original image including a texture image to be used, and the first display means.
Designating means for designating a point on the polygon of the polygon image displayed by the display means and a point on the texture original image displayed by the second display means, which corresponds to the point, and the polygon image by the designating means. An assigning unit that assigns position information of the point associated with the texture original image to each of the points specified above, and a position of the corresponding point on the texture original image with a point on the polygon by the assigning unit. It is provided with polygon data to which information is added, and an output means for outputting the texture original image as drawing data.

Preferably, the points on the polygon designated by the designating means are the vertices of the polygon to which the texture image is pasted.

Further, preferably, the designating means designates a first designating means for designating one or a plurality of polygons to which the texture image is pasted, and one or a plurality of designated by the first designating means. And a second designating unit for designating each vertex of the polygon displayed by the third display unit and a corresponding point in the texture image. Since the polygon to which the texture is pasted is extracted and displayed, the texture to which the pasting is applied becomes clear, and it becomes easier to specify the vertices and the like.

Further, preferably, the image forming apparatus further comprises a cutting-out means for cutting out, as a texture image, an area including a point designated by the designating means from the texture original image displayed by the second displaying means, and the assigning means. For each point specified on the polygon image by the specifying means,
Position information of corresponding points on the texture image cut out by the cutting means is added, and the output means adds position information of corresponding points on the texture image to points on the polygon by the adding means. The polygon data and the texture image are output as drawing data. It is possible to cut out the texture image from the texture original image, obtain a texture image that does not include extra portions as much as possible, and reduce the size of texture data.

[0012]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the schematic arrangement of an information processing apparatus according to this embodiment. In the figure, 1
Reference numeral 01 denotes a CPU, which executes various processes including the procedure of this embodiment. 102 is a memory unit, and the CPU 101
R that stores the control program that describes the procedure to be executed by
The OM 102a and the RAM 102b that provides a work area when the CPU 101 executes various processes are provided. 1
An external memory 03 stores data to be processed such as polygon data, original texture image, and texture data. An input / output interface 104 inputs / outputs data to be processed from outside the device. For example, the input / output interface 104 realizes connection with a scanner for reading a texture original image.

Reference numeral 105 denotes a keyboard for performing various inputs such as data selection. Reference numeral 106 denotes a pointing device, which uses a mouse in the present embodiment, and
Indicate the desired position on 07. A display device 107 displays a processing status, a processing result, a processing process, and processing data. The display device 107 is display-controlled by a window system to realize multi-window display.

Next, a process of pasting a texture image onto a polygon in the information processing apparatus of the present embodiment having the above configuration will be described. FIG. 2 is a flowchart showing a processing procedure when a texture image is attached to a polygon.

In step S201, polygon data representing a three-dimensional shape is read through the input / output interface 104 and stored in the external memory 103 (FIG. 1).
Polygon data 103a). The polygon data is data that can be created using an existing 3D CAD tool or the like and that represents a 3D object or scene as a surface plate. The polygon data is data composed of a plurality of polygons or one polygon.

The polygon data is previously CAD
It is created by a system and stored in a storage medium such as a floppy disk. For example, in the case of a floppy disk, polygon data is read using a floppy disk drive connected to the input / output interface 104. Note that polygon data may be created by executing an application such as CAD in the information processing apparatus. In this case, the created polygon data is directly stored in the external memory 103.

Next, in step S202, the texture original image is read. The texture original image is an image that is a source of a texture to be attached as a pattern on the surface of a polygon, and is a normal color image or a grayscale image. In this step as well, similarly to step S201, input is performed through the input / output interface 104, and data is stored in the external memory 103 (texture original image 103 in FIG. 1).
b). In this case, the input / output interface 104 is connected to, for example, a scanner that reads an image. Also, the texture original image read in this step is the step S
An image which is a base of a texture to be attached to the polygon data read in 201. In addition,
The texture original image stored in the external memory 103 may be plural or one.

Next, in step S203, three-dimensional drawing of polygon data is performed. In this step, first 10
Create one window in 7 window system,
The polygon data stored in 102 is drawn in the window as a three-dimensional scene. 3 polygon data
As a simple method of drawing as a three-dimensional scene, for example, there is a method of presenting an image projected on the projected plane in a window based on the projective transformation of the three-dimensional position of the polygon data onto the two-dimensional plane. Any other method may be used to draw the polygon data.

Next, in step S204, step S
Using the mouse 106, a plurality of or one polygon to which the texture is to be attached is designated from the polygon data drawn by 203. This example is shown in FIG. FIG. 3 is a diagram showing a state of a display screen in the window system of this embodiment. In FIG. 3, reference numeral 31 denotes a window displayed on the display device 107. In the window 31, three windows are three-dimensionally displayed and polygon data are three-dimensionally drawn. It shows that a polygon is selected. The selected polygon is displayed in different colors (hatched in FIG. 3). The polygon can be specified by moving the mouse cursor into the desired polygon area and clicking the mouse button.

Next, in step 205, the polygon selected in step S204 is extracted and three-dimensionally drawn (see window 41 in FIG. 4). The three-dimensional drawing method is the same as in step S203. In addition, the three-dimensional drawing image generated in this step will be processed in the subsequent step S207.
Used to specify the vertices of a polygon.

Next, in step S206, step S
A texture original image corresponding to the polygon selected in 204 is selected from the texture original image group stored in the external memory 103, and the image is newly generated and displayed on the display device 107 (see FIG. 4). See window 42). This is a step in which the operator selects a pattern to be attached to the polygon. In the window 42, a Japanese-style room is displayed as the original image of the texture. The texture original image shown in this window 42 is a color gradation image.

Next, in step S207, one vertex on the polygon drawn in the window 41 of FIG. 4 is designated using the mouse 106, and in step S208, a point on the original texture image corresponding to this vertex ( Hereinafter, the corresponding points are designated) using the mouse 106.
The processes of steps S207 and S208 are performed on all the vertices of the selected polygon (step S20).
9). The relationship between the vertices for which correspondence is designated in the above process and the corresponding points is stored in the external memory 103 as corresponding point data 103d.

FIG. 4 is a diagram showing a state in which a vertex of a polygon and a corresponding point on the original texture image are designated. The extracted texture image is displayed in the window 41 of FIG. 4, and the texture original image (photo image of a Japanese-style room) is displayed in the window 42. As a result of designating the vertex of the polygon and the corresponding point in the texture original image. (The vertices and corresponding points are indicated by x). As a result, the corresponding point data is, for example, the corresponding point a ′ of the texture original image of the window 42 with respect to the vertex a of the polygon image of the window 41,
Similarly, the vertex b is configured to have a corresponding point b ′.

The vertices of polygons are not always associated with all the image planes of the original texture image. Therefore, in step S210, an unnecessary area is cut out from the original texture image, and an image of the necessary area is cut out and stored in the external memory 103 as texture data (texture data 103c in FIG. 1). As a simple method of cutting out an image, there is a method of cutting out a rectangle including the vertex from a range on the image plane indicated by a point in the texture original image with which the vertex is associated. In the display example of the window 42 of FIG. 4, a rectangle including a quadrangle of a'c'd'e 'is cut out. In addition, it is desirable that the rectangle to be cut out is set so that the area thereof is minimized. This is because the size of texture data can be made smaller.

Further, in step S211, position information of corresponding points in the cut out texture image (texture data) is added to each vertex of the polygon. Since the corresponding points corresponding to the respective vertices are held as the corresponding point data 103d, the corresponding points may be acquired by referring to this. Further, this position information indicates the position by the image coordinate value of the texture image, the value when the horizontal axis and the vertical axis of the texture image are normalized (it becomes a value of 0 to 1), and the like. The polygon data in which the information of each corresponding point in the texture image is added to each vertex is overwritten as polygon data 103a. As polygon data with corresponding point information,
Needless to say, it may be stored in a separate file.

Then, in step S212, the texture image and the polygon data associated with the texture image are output as a result through the input / output interface 104.

The user is inquired whether or not the above steps S203 to S212 are to be performed on other polygons, and if it is to be performed on other polygons, step S2.
It returns to 03 (step S213). On the other hand, if there is an instruction to end this processing, this processing is ended from step S213.

With the above procedure, it is possible to interactively associate polygon data representing only a three-dimensional shape with an image, and computer graphics data representing a surface pattern can be generated.

[Other Embodiments] (1) The step of outputting the polygon data and the texture data of step S212 may come after step S213.

(2) Except for the method of cutting out the texture data from the texture original image in step S210, from the range on the image plane of the points in the texture original image to which the vertices are associated, as a rectangle enclosing it. However, various methods such as generating texture data in a rectangular shape by linear or non-linear conversion can be considered.

(3) Steps S204 and S20
There is a method in which step 5 is omitted and the polygon data created in step S203 is used as it is in step S207. This means that the polygon is not preliminarily selected in advance, but the texture is pasted to the polygon including the vertex selected for association with the texture. Therefore, also in step S209, it is not verified whether the vertices have been specified for all the specified polygons, but it is verified whether or not there are any unspecified vertices in the polygons for which the vertices have been selected. .

(4) Although the mouse is used as the pointing device 106 in the above embodiment, the present invention is not limited to this.
For example, it is obvious that a tablet or the like can be used.

(5) In the above embodiment, the display device 107
As a window system capable of displaying a plurality of windows as above, even if only one screen can be used as one window, it can be substituted by dividing the display within one screen (in the window). .

(6) In the above embodiment, the polygon data in which the corresponding points of the texture image are added to each vertex and the texture image are output via the input / output interface 104. That is, these data can be stored in a storage medium such as a floppy disk or provided to an external device for drawing. However, as described above, these data are stored in the external memory 103.
It is needless to say that the information processing apparatus may perform the drawing processing using these and display it on the display device 107.

As described above, according to the present embodiment,
It is possible to specify the position that should correspond to each vertex of polygon data in the original texture image, and even if the pasting polygon data has a complicated shape, paste the texture data with a simple operation. be able to. The object of the present invention achieved by the function of the above apparatus or the function of the method can also be achieved by the storage medium in which the program of the above-described embodiment is stored. That is, the storage medium is mounted on the device and the program itself read from the storage medium achieves the novel function of the present invention. In this case, a description will be given by taking a floppy disk as an example of the storage medium. The control program stored in the floppy disk is the input / output interface 10
4 is read from the floppy disk drive connected to 4 and loaded into the RAM 102b of the memory unit 102,
It is executed by the CPU 101. The structural characteristics of the program according to the present invention are as shown in FIG.

FIG. 6A is a diagram showing a control procedure by each processing module of this program. 61 is the first
This is a display process, and a polygon image composed of one or a plurality of polygons is displayed like the window 31. This process corresponds to step S203 described above. Also, 62
Is a second display process, and the original texture image including the texture image to be used is displayed as in the window 42.
This process corresponds to step S205 described above.

Further, 63 is a designation process, which is a point on the polygon of the polygon image displayed in the first display process 61,
The point on the original texture image displayed in the second display process 62 to be associated with this is designated. In this process, the vertices of the polygon on the window 31 and the corresponding points on the texture image on the window 42 are designated. As in the above embodiment, the polygon to be pasted is extracted and the window 41 is displayed. After that, the vertices and the corresponding points may be designated (steps S205, S207 to S207).
209).

Reference numeral 64 denotes an adding process, which assigns to each of the points designated on the polygon image by the designation step.
Position information of the corresponding point on the original texture image is added (step S211). At this time, if a rectangular area having corresponding points is cut out from the original texture image to form a texture image as in the above embodiment, the size of the texture data can be reduced, which is convenient (step S210).

Reference numeral 65 denotes an output process, which outputs polygon data in which the position information of the corresponding point on the texture original image is added to the point on the polygon by the adding process 64 and the texture original image as drawing data ( Step S21
2).

FIG. 6B shows an example of the storage state of the control program in the storage medium. Each control module indicated by 61'-65 'includes program code for executing the processing indicated by 61-65.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of a single device. Further, it goes without saying that the present invention can be applied to the case where it is achieved by supplying a program to a system or an apparatus. In this case, the storage medium storing the program according to the present invention constitutes the present invention. Then, by reading the program from the storage medium to the system or device, the system or device operates in a predetermined manner.

[0043]

As described above, according to the present invention,
It is possible to automatically associate the position of the point specified on the polygon image with the position of the point specified on the original texture image including the required texture image, so paste the texture image to the polygon. Easy to operate.

Further, according to the present invention, computer graphics data having a texture is interactively generated from an image in which the area of the polygon is appropriately contained in the image without facilitating the texture image matched with the polygon in advance. It becomes possible to do.

[0045]

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an information processing apparatus according to this embodiment.

FIG. 2 is a flowchart showing a processing procedure when a texture image is attached to a polygon.

FIG. 3 is a diagram showing a state of a display screen in the window system of this embodiment.

FIG. 4 is a diagram showing a state in which a vertex of a polygon and a corresponding point on a texture original image are designated.

FIG. 5 is a diagram illustrating a general texture image acquisition method.

FIG. 6 is a diagram illustrating a configuration of a storage medium that stores a control program for realizing the control of the present embodiment.

[Explanation of reference numerals] 101 CPU 102 Storage device 2 103 Storage device 1 104 Input / output interface 105 Keyboard 106 Pointing device (mouse) 107 Display device (window system)

Claims (10)

[Claims] 1. A first display unit for displaying a polygon image composed of one or a plurality of polygons, a second display unit for displaying a texture original image including a texture image to be used, and the first display unit. Designation means for designating the points on the polygon of the polygon image displayed in step 1 and the points on the texture original image displayed by the second display means, which correspond to the points, on the polygon image by the designation means. To each of the specified points, the assigning means for assigning the position information of the point associated with the texture original image, and the position information of the corresponding point on the texture original image to the point on the polygon by the assigning means. With the attached polygon data,
An information processing apparatus, comprising: an output unit that outputs the texture original image as drawing data. 2. The information processing apparatus according to claim 1, wherein the points on the polygon designated by the designating unit are respective vertices of the polygon to which the texture image is pasted. 3. The designating means designates a first designating means for designating one or a plurality of polygons to which the texture image is pasted, and one or a plurality of polygons designated by the first designating means. A third display means for extracting and displaying as a polygon image, and a second designating means for designating each vertex of the polygon displayed by the third display means and a corresponding point in the texture image. The information processing device according to claim 1. 4. The image forming apparatus further comprises a cutout unit that cuts out, from the original texture image displayed by the second display unit, a region including a point designated by the designating unit as a texture image, and the assigning unit uses the designating unit. The position information of the corresponding points on the texture image cut out by the cutting means is given to each of the points specified on the polygon image, and the output means gives the texture to the points on the polygon by the giving means. The information processing apparatus according to claim 1, wherein the polygon data to which the position information of the corresponding points on the image is added and the texture image are output as drawing data. 5. A first display step of displaying a polygon image composed of one or a plurality of polygons, a second display step of displaying a texture original image including a texture image to be used, and the first display step. A point on the polygon image displayed on the polygon image and a point on the original texture image displayed in the second display step that should correspond to the point on the polygon image; To each of the specified points, a step of giving position information of points associated with the texture original image, and a step of giving the position information of corresponding points on the texture original image to points on the polygon in the giving step With the attached polygon data,
An output process of outputting the texture original image as drawing data, the information processing method. 6. The information processing method according to claim 5, wherein the points on the polygon designated in the designation step are respective vertices of the polygon to which the texture image is pasted. 7. The designating step includes a first designating step of designating one or a plurality of polygons to which the texture image is pasted, and one or a plurality of polygons designated in the first designating step. A third display step of extracting and displaying as a polygon image, and a second designation step of designating each vertex of the polygon displayed in the third display step and a corresponding point in the texture image are provided. The information processing method according to claim 5. 8. The image forming apparatus further comprises a cutout step of cutting out, from the texture original image displayed in the second display step, a region including a point designated in the designation step as a texture image, wherein the assigning step is performed by the designation step. To each of the points specified on the polygon image, position information of a corresponding point on the texture image cut out in the cutting step is added, and in the output step, the texture is added to the points on the polygon in the adding step. The information processing method according to claim 5, wherein the polygon data to which the position information of the corresponding point on the image is added and the texture image are output as drawing data. 9. A computer control device for controlling a computer by reading a predetermined program from a memory medium, the memory medium displaying a polygon image composed of one or a plurality of polygons. Procedure code, the procedure code of the second display step for displaying the texture original image including the texture image to be used, the points on the polygon of the polygon image displayed in the first display step, and the corresponding points The procedure code of the designating step for designating the points on the texture original image displayed in the second display step and the point designated on the polygon image by the designating step respectively correspond on the texture original image. The procedure code of the adding step for adding the positional information of the added points, and the point on the polygon in the adding step, which corresponds to the point on the original texture image. A polygon data position information of points is assigned,
And a procedure code of an output process for outputting the original texture image as drawing data. 10. A procedure code of a cutout step of cutting out, as a texture image, a region including a point designated in the designation step from the original texture image displayed in the second display step, the adding step further comprising: To each of the points specified on the polygon image by the specifying step, the position information of the corresponding point on the texture image cut out in the cutting step is added, and the output step includes the points on the polygon in the adding step. 10. The computer control device according to claim 9, wherein the polygon data to which the position information of the corresponding point on the texture image is added, and the texture image are output as drawing data.