JPH10198819A - Water surface image display device, its image displaying method, and machine-readable recording medium recording computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water surface image display device that can show a water surface image in more real expressing form than conventional ones. SOLUTION: When sea surface image display processing starts, a TB(texture blender) 40 sets RGB values of each point on a screen on which the texture is shown by using texture data that is set by a CPU 1 and data of top and bottom polygons 33 and 34. Then, DB(destination blender) 41 makes a frame buffer store an image in which the polygon 33 to which semitransparent texture is attached is overlapped over the polygon 34 to which opaque texture is attached with a gap between them. A plotting processing processor 10 displays and outputs the contents of the frame buffer on a television monitor 22. Thereby, the beautiful image of sea surface 28 having depth is shown on the screen on the screen.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an image display device for displaying an image of a water surface set in a virtual three-dimensional space on a screen,
The present invention relates to an image display method and a machine-readable recording medium on which a computer program is recorded.

[0002]

2. Description of the Related Art Conventionally, an image of a water surface (for example, the sea surface) is displayed at a position corresponding to a bottom surface of a virtual three-dimensional game space displayed on a screen, and a fighter or the like operable by a game player on the water surface. 2. Description of the Related Art There is a video game machine that executes a shooting game in which a (own character) is displayed and a fighter or the like (enemy character) appearing in a game space can be destroyed. An image of water displayed by such a computer device is generally formed with a single texture depicting the surface of the water (eg, the surface of the sea).

[0003]

By the way, there has been a request from the game player of the video game machine described above to display an image of the water surface in a more realistic expression form.

The present invention has been made in view of the above-mentioned demands, and has an image display apparatus for a water surface capable of displaying a water surface image displayed in a virtual three-dimensional space displayed on a screen in a more realistic expression form. , An image display method thereof, and a machine-readable recording medium on which a computer program is recorded.

[0005]

The present invention employs the following configuration to solve the above-mentioned problems. That is, the invention according to claim 1 is an apparatus for displaying an image of a water surface set in a virtual three-dimensional space on a screen, wherein image information storage means for storing image information of a texture on which a water surface pattern is drawn,
Polygon data storage means for storing data of two polygons to which the texture is pasted, and pasting the texture to the two polygons based on image information of the texture and data of the two polygons, respectively; First setting means for arranging the two polygons in the virtual three-dimensional space in a state of being overlapped with an interval above and below, and setting the image of the texture pasted on the polygon arranged on the upper side as translucent A second setting unit, and an output unit for displaying and outputting, on the screen, a texture image pasted on the two polygons set by the first setting unit and the second setting unit. And The invention of claim 1 relates to the first invention of the present application.

According to the first aspect of the present invention, when an image of a water surface set in a virtual three-dimensional space is displayed on a screen, first, the first setting means applies the texture to the two polygons respectively. At the same time, the two polygons are arranged in the virtual three-dimensional space in a state where the two polygons are overlapped with a space therebetween. Then, the second setting unit sets the texture image pasted on the polygon arranged on the upper side as translucent. Then, the output unit displays and outputs the image of the texture pasted to the two set polygons on a screen. This makes it possible to display a real image of the water surface with a sense of transparency and a sense of depth on the screen.

According to a second aspect of the present invention, there is provided an apparatus for displaying an image of a water surface set in a virtual three-dimensional space on a screen, comprising: image information storage means for storing image information of a texture on which a water surface pattern is drawn; Polygon data storage means for storing data of two polygons to which the texture is pasted, and pasting the texture to the two polygons based on image information of the texture and data of the two polygons, respectively; First setting means for arranging the two polygons in the virtual three-dimensional space in a state of being overlapped with an interval above and below, and an image of a texture pasted on the polygon arranged on the upper side is displayed on the screen. The transparency is set to increase from the middle to the back of the virtual three-dimensional space. Second setting means for setting the attached texture in a state in which fog is applied more strongly from the middle to the far side of the virtual three-dimensional space displayed on the screen, the first setting means, and the second setting means Output means for displaying and outputting on the screen an image of the texture pasted on the two polygons set by the above. The invention of claim 2 relates to the second invention of the present application.

According to the second aspect of the present invention, the second setting means sets the texture image of the upper polygon in a state in which the transparency increases from the middle to the back of the virtual three-dimensional space, and sets the texture image on the lower polygon. Is set in such a state that fog is applied more strongly from the middle to the back of the virtual three-dimensional space displayed on the screen. When the output unit displays and outputs the images of the two textures set in this way on the screen, an image of the water surface that looks like fog is displayed from the middle to the back of the screen.

According to a third aspect of the present invention, a texture in which the same water surface pattern is drawn is attached to the two polygons according to the first or second aspect.
According to a fourth aspect of the present invention, the virtual three-dimensional space according to any one of the first to third aspects is set so as to move toward the near side of the screen. This is specified because the texture images pasted on the two polygons are set so as to individually move toward the near side of the screen.

According to a fifth aspect of the present invention, the transparency according to the degree of fog applied to the image of the texture attached to the polygon disposed on the lower side according to the second aspect of the present invention is set to the upper side. This is specified by being set for the image of the texture pasted on the placed polygon.

The invention according to claim 6 is a method for displaying an image of a water surface set in a virtual three-dimensional space on a screen,
Read the image information of the texture on which the water surface pattern was drawn,
The data of the two polygons to which the texture is pasted is read out, and the image information of the texture and
Based on the data of the two polygons, the textures are pasted on the two polygons, respectively, and the two polygons are arranged in the virtual three-dimensional space in a state of being overlapped with an interval above and below, and arranged on the upper side. The image of the texture pasted on the set polygon is set as translucent, and the image of the texture pasted on the two set polygons is displayed and output on the screen.

A seventh aspect of the present invention is a method for displaying an image of a water surface set in a virtual three-dimensional space on a screen, wherein image information of a texture on which a water surface pattern is drawn is read and the texture is pasted. The data of the two polygons is read, and the texture is pasted on the two polygons based on the image information of the texture and the data of the two polygons, respectively, and the two polygons are overlapped at an interval above and below. In the virtual three-dimensional space, and the transparency of the image of the texture pasted on the polygon arranged on the upper side increases from the middle to the back of the virtual three-dimensional space displayed on the screen. While setting in the state, the image of the texture pasted on the polygon arranged on the lower side is displayed on the virtual 3 Set the mid-dimensional space in a state where the fog is applied strongly toward the far side, and displaying output images of the texture affixed to two polygons is set on the screen.

According to an eighth aspect of the present invention, there is provided a machine-readable recording medium storing a computer program for causing a computer to execute a process of displaying and outputting an image of a water surface set in a virtual three-dimensional space on a screen. Reading the image information of the texture on which the water surface pattern is drawn, reading the data of the two polygons to which the texture is pasted, and based on the image information of the texture and the data of the two polygons.
Attaching the texture to each of the two polygons, and arranging the two polygons in the virtual three-dimensional space in a state where the two polygons are vertically overlapped with each other; Setting the textured image as translucent,
And outputting a texture image pasted to the two set polygons on the screen. The program is recorded on a machine-readable recording medium.

According to a ninth aspect of the present invention, there is provided a machine-readable recording medium storing a computer program for causing a computer to execute a process of displaying and outputting an image of a water surface set in a virtual three-dimensional space on a screen. Reading the image information of the texture on which the water surface pattern is drawn, reading the data of the two polygons to which the texture is pasted, and based on the image information of the texture and the data of the two polygons.
Attaching the texture to each of the two polygons, and arranging the two polygons in the virtual three-dimensional space in a state where the two polygons are vertically overlapped with each other; The image of the texture is set in a state in which the transparency increases from the middle to the back of the virtual three-dimensional space displayed on the screen, and the image of the texture pasted on the polygon arranged on the lower side is Virtual 3 displayed on screen
A program for executing a step of setting a state in which fog is applied more strongly from the middle to the depth side of the dimensional space and a step of displaying and outputting a texture image pasted on the two set polygons to the screen is described. This is a machine-readable recording medium on which recording is performed.

Here, the recording medium includes RAM, ROM,
CD-ROM, floppy disk, hard disk,
Magneto-optical disks and the like are included.

[0016]

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

[0017]

FIG. 1 is a block diagram showing a video game machine provided with a water surface image processing apparatus according to a first embodiment. This video game machine includes an apparatus main body and a controller 21. Further, a CD-ROM 23 as a medium on which a game program (computer program) is recorded is mounted on the apparatus main body, and a television monitor 22 is connected to the apparatus main body.

The apparatus main body includes a CPU 1, a graphics data generation processor 3 directly connected to the CPU 1,
An interface circuit 4, a main memory 5, a ROM 6, a decompression circuit 7, a parallel port 8, a serial port 9, and a drawing processor 10, which are mutually connected to the CPU 1 via a bus (address bus, data bus and control bus) 2. , Audio processor 12, decoder 1
4, an interface circuit 19, a buffer 11 connected to the rendering processor 10, and a buffer 13 and an amplifier 17 connected to the audio processor 12.
, A speaker 18 connected to the amplifier circuit 17, a buffer 15 and a CD-ROM connected to the decoder 14.
It comprises a driver 16 and a memory 20 connected to an interface circuit 19. Controller 2 described above
1 is connected to the interface circuit 19. The above-described television monitor 22 is connected to the drawing processor 10.

Here, the graphics data generation processor 3 plays a role as a so-called coprocessor of the CPU 1. That is, the graphics data generation processor 3 performs coordinate transformation and light source calculation, for example, calculation of a matrix or vector in a fixed-point format by parallel processing.
The main processing executed by the graphics data generation processor 3 is a processing target based on coordinate data, movement amount data and rotation amount data of each vertex in a two-dimensional or three-dimensional plane of image data supplied from the CPU 1. The processing includes obtaining an address on the display area of the image and returning the address data to the CPU 1 again, and calculating the luminance of the image in accordance with the distance and angle from the virtually set light source.

The interface circuit 4 is an interface circuit for a peripheral device, for example, a pointing device such as a mouse or a trackball. ROM
Reference numeral 6 stores program data as an operation system of the apparatus main body. The main memory 5 is a CD
-A memory in which the game program from the ROM 23 is loaded. Programs and data are appropriately paged from the main memory 5 to the CPU 1 and processed by the CPU 1.

In the expansion circuit 7, MPEG (Moving Pictur)
e Engineering Group) and JPEG (Joint Pincture Engi)
A decompression process is performed on a compressed image that has been compressed by intra-coding conforming to the NNering Group. Decompression processing includes decoding processing (decoding of data encoded by VLC: Valid Length Code), inverse quantization processing, ID
These include CT (Inverse Discrete Cosine Transform) processing, intra-image restoration processing, and the like.

The drawing processor 10 performs a drawing process on the buffer 11 based on a drawing command issued by the CPU 1, and outputs an image drawn in the buffer 11 to the television monitor 22. The buffer 11
It consists of a display area and a non-display area. The display area is an area for developing data displayed on the display surface of the television monitor 22, such as a frame buffer. The non-display area is an area for storing texture data, color pallet data, and the like. In the present embodiment, each time the scene (stage) of the video game is changed, and as necessary, the CPU 1
It is set so as to be expanded to the non-display area via “0”. Here, the texture data is two-dimensional image data. The color pallet data is data for specifying a color such as texture data. The drawing command issued by the CPU 1 includes, for example, a drawing command for displaying a line, a drawing command for drawing a three-dimensional image using polygons, a drawing command for drawing a normal two-dimensional image, and the like. It is.

Further, as shown in FIG. 2, the drawing processor 10 includes a texture blender 40 (hereinafter referred to as "T
B40 ”), destination blender 4
1 (hereinafter, referred to as “DB41”). Here, the TB 40 uses the data of the polygon to be subjected to the drawing process, refers to the data of the texture developed in the non-display area of the buffer 11, and displays the texture on the screen of the television monitor 22 for displaying the texture. Set the color for each point (dot). That is, the TB 40 calculates R (red), G (green), and B at each point on the screen displaying the texture.
The value of (blue) is corrected and set according to the condition given by the CPU 1. Here, R, G, and B are from 0 (dark) to
It is set to take a value up to 1 (bright). The TB 40 is used for a lighting effect or the like.

The DB 41 receives from the TB 40 the RGB values set for each point on the screen displaying the texture. Subsequently, the following interpolation formula (Equation 1) is calculated for each point on the screen displaying the texture, thereby performing linear interpolation of the RGB values of each point on the screen displaying the texture. Then, the DB 41 writes the calculation result of (Equation 1) for each point on the screen displaying the texture in a frame buffer (display area of the buffer 11) having a storage area corresponding to each point.

A1 × α + B1 × (1−α) (Equation 1) Here, A1 in (Equation 1) indicates the RGB value of the point on the screen received from the TB 40, and B1 indicates the RGB value of the interpolation color data set at each point on the screen on which the primary interpolation is based. Further, α in (Equation 1) is a value set for each point on the screen displaying the texture, and is a value representing the degree of transparency, the strength of the fog color, and the like. This α is set as 0 ≦ α ≦ 1, and is used as a value representing the transparency in the present embodiment. That is, 0
(Transparent) ≦ α ≦ 1 (opaque).

In the operation of (Equation 1), the DB 41 first multiplies the RGB values of the points on the screen received from the TB by α as the operation of “A1 × α” in (Equation 1). . Subsequently, as an operation of “B1 × (1−α)” in (Equation 1), the RG set at a point on the screen to be subjected to the primary interpolation is set.
The value of B is multiplied by (1−α). And "A1
The calculation result of (Equation 1) is calculated by obtaining the sum of the calculation result of “× α” and the calculation result of “B1 × (1−α)”.

In this embodiment, the RGB values of each point used in the processing by the TB 40 are preset as texture data in the non-display area of the buffer 11, and are read out as appropriate. Also, the value of each α is
Is set in advance.

The processing by the TB 40 and the DB 41 described above is as follows. That is, as shown in the flowchart of FIG.
As a pre-process of the process by 41, the CPU 1 sets the polygon data, texture data, and primary interpolation target color data (B1 data) for each polygon based on the program loaded into the main memory 5, and sets the texture. Is set for each point on the screen where is displayed. Next, in S2, the TB 40 determines that the drawing order has turned 1
For each polygon, RGB values are set for each point on the screen displaying the texture based on the set polygon data and texture data, and each RGB value is set to α.
Is passed to the DB 41 together with the value of Then, in S3,
DB41, for each point on the screen to display the texture,
The calculation of the above (Equation 1) is performed, and the calculation result is written to the corresponding storage area of the frame buffer.

The audio processor 12 shown in FIG.
Converts the PCM audio data read from the CD-ROM 23 into ADPCM data. The ADPCM data processed by the audio processor 12 is output from the speaker 18 as audio.

The CD-ROM driver 16 is a CD-RO driver.
The data such as program data and map information and audio data are read from M23, and the read data is supplied to the decoder 14.

The decoder 14 is a CD-ROM driver 1
ECC (Error Correction)
(n Code), and supplies the error-corrected data to the main memory 5 or the audio processor 12.

The memory 20 is a card type memory,
In order to maintain the state at the time of the game interruption, various parameters at the time of the game interruption are stored. Controller 21
Is a cross key 21g integrating a left key, a right key, an up key, and a down key, a left button 21L and a right button 21R.
, Start button 21a, select button 21b
And first to fourth buttons 21c to 21f. The cross key 21g is a key for the game player to give commands indicating up, down, left, and right to the CPU 1. The start button 21a indicates that the game player
-A key for instructing the CPU 1 to start a game program loaded from the ROM 23. The select button 21 b allows the game player to make various selections regarding the game program loaded on the main memory 5.
These are keys for instructing the CPU 1.

In the above-described CD-ROM 23, a fighter is displayed in a pseudo three-dimensional manner in a virtual three-dimensional game space.
The game player operates the (own character) to record a game program of a shooting game for destroying a fighter, a battleship, and the like (enemy character) appearing in the game space, and data used for executing the game program.
When the CD-ROM 23 is loaded in the main body of the apparatus and the power is turned on, the CPU 1 of the video game machine causes the CD-RO
The game programs and data of M23 are read one after another and loaded into the main memory 5. And CPU1
However, by executing the game program, first, a title screen of a game (not shown) is displayed on the television monitor 22. In this state, the controller 2
When the first start button 21b is pressed, the title screen displayed on the television monitor 22 is switched to the game play screen of the shooting game described above.

FIG. 2 is a diagram showing a display example of a game play screen displayed on the television monitor 22 by executing the game program. In the display example shown in FIG. 2, a virtual three-dimensional game space is formed when viewed from a bird's eye (when photographed by a virtual camera C1 (see FIG. 3) arranged at a bird's eye position). A sea surface 28 is displayed on a portion corresponding to the bottom of the game space as the terrain of the space, and a sky 29 is displayed on the upper side of the screen with the horizontal line as a boundary. A fighter (own character) 30 operable by the game player is positioned above the sea surface 28 in the game space.
Are displayed in a pseudo three-dimensional image. Also, on the sea surface 28 on the far side of the game space, two enemy characters 3 to be destroyed by the game player by operating the player character 30 are displayed.
1 is displayed as a pseudo three-dimensional image.

The own character 30 moves up, down, left and right on the screen when the cross button 21g of the controller 21 is pressed. The enemy character 31 is set to appear from the right, left, or upper side of the screen (for example, when the enemy character is a fighter). Further, the game space is set to forcibly move (scroll) toward the near side, and the sea surface 28 also moves toward the near side. Thereby, the own character 30
However, the state of flying over the sea surface 28 is displayed as an animation. In the present embodiment, the movement of the game space is performed by changing the above-described three-dimensional coordinates of the virtual camera C1 so as to advance toward the back of the game space.

Next, a method of displaying an image of the sea surface displayed on the television monitor 22 will be described. FIG. 5 is a principle diagram of a method for displaying an image of the sea surface. As shown in FIG. 5, the sea surface 28 includes two rectangular planar polygons 3 each having a texture on which a wave pattern (water surface pattern) is drawn.
It consists of 3,34 textures. Two polygons 33,
In the texture 34, the texture of the polygon 33 is set to be translucent, and the texture of the polygon 34 is set to be opaque. Further, the polygons 33 are arranged on the polygons 34 in a state of being overlapped at intervals. Then, the textures of the polygons 33 and 34 in this state are virtual cameras C1 arranged at bird's-eye positions.
Are combined and displayed on the television monitor 22 as an image of the sea surface 28.

Such an image of the sea surface 28 is represented by the above-mentioned C
This is realized by processing by PU1, TB40 and DB41. More specifically, when displaying the image of the sea surface 28 on the television monitor 22, the CPU 1 executes, as preprocessing, data of the polygon 33, data of the polygon 34, data of the texture on which the wave pattern is drawn,
RGB values to be used by TB40, primary interpolation color data
(Data related to B1 in Equation 1) and the value of the transparency α set for each point are set. At this time, polygon 33,
As the setting of the primary interpolation color data for the polygon 34, the RGB values stored in the corresponding storage areas of the frame buffer at the time of the processing for the polygons 33 and 34 are set.
The setting for the value of B1 in (Equation 1) is made.

When the setting by the CPU 1 is completed, TB4
1 uses the data of the lower polygon 34 located farther from the virtual camera C1, uses the data of the texture in which the wave pattern is drawn, and the RGB 40 to be used by the TB 40.
The RGB values of each point on the screen displaying the texture of the polygon 34 are set while referring to the values of the polygon 34, and the set RGB values are supplied to the DB 41, respectively. Further, the TB 40 supplies the value of the transparency α set for each point to the DB 41. As the value of the transparency α of the texture of the polygon 34, α = 1 (opaque) is set.

DB 41 stores each R received from TB 40.
The value of GB is multiplied by the value of transparency α set corresponding to each value of RGB (“A1 × α” in Expression 1).
Operation). Subsequently, the DB 41 reads the RGB values stored in the corresponding storage area of the frame buffer set as the value of B1, and multiplies each of the read RGB values by (1−α) (Equation 1). "B1 ×
(1−α) ”) Subsequently, the DB 41 stores“ A1 ×
sum of the calculation result of “α” and the calculation result of “B1 × (1−α)”
(Total value), that is, the calculation result of (Equation 1) is obtained. Then, the calculation result of (Equation 1) is written again to the same storage area (the storage area from which the RGB values are read) of the frame buffer. Here, since the value of the transparency α of the texture of the polygon 34 is set at α = 1, it is the same as writing the RGB values received from the TB 40 directly to the corresponding storage area of the frame buffer.

When all the processes for the polygon 34 are completed, the next polygon (the polygon whose drawing order has been turned next)
, The upper polygon 33 is selected. Then T
B40 sets RGB values for each point on the screen displaying the texture based on the data of the polygon 33 and the data of the texture on which the wave pattern is drawn, and supplies the RGB values to the DB41. The value of α = 0.5 set as the transparency α of the texture of the polygon 33 is supplied to the DB 41.

Then, the DB 41 similarly performs the operation of (Equation 1) and writes the operation result to the corresponding storage area of the frame buffer. At this time, as the value of B1 in (Equation 1), the value of RGB currently stored in each corresponding storage area of the frame buffer, that is,
The calculation result of (Equation 1) for the texture of the polygon 34 is used. Therefore, the value obtained by multiplying the RGB value (B1) of the texture pasted on the polygon 34 by (1−α) and the RGB value of each point on the screen displaying the texture pasted on the polygon 33 ( The sum of the value obtained by multiplying A1) by the transparency α (the calculation result of Expression 1) is written to the corresponding storage area of the frame buffer. That is, the data of the texture pasted on the polygon 33 and the data of the texture pasted on the polygon 34 are synthesized at a ratio of α: 1−α.

Then, the contents stored in the frame buffer are output to the television monitor 22 by the drawing processor 10. Then, the screen of the television monitor 22 displays a semi-transparent (transparency α = 0.5) on the texture of the opaque (transparency α = 1) polygon 34.
An image obtained by superimposing the textures of the polygons 33 at intervals with each other is displayed as an image of the sea surface 28. At this time, since a wave pattern is drawn on the texture pasted on the polygons 33 and 34, a very beautiful realistic sea surface image can be obtained. Note that the texture pasted on the polygon 33 and the texture pasted on the polygon 34 may be the same pattern drawn.
Further, it may be set so that the same texture is pasted on the polygon 33 and the polygon 34.

Next, the process of displaying an image of the sea surface by the video game machine will be described. FIG. 6 is a flowchart showing the display processing of the image of the sea surface. This display process is performed, for example, when the start button 21b is pressed while a title screen (not shown) is displayed on the television monitor 22, and a display command for a game play screen is input to the CPU 1, thereby displaying a sea scene. It starts when (stage) starts.

In S01, the CPU 1 determines the texture (wave pattern, own character 30,
The data of the texture of the enemy character 31 and the like is read out from the main memory 5 and expanded in the non-display area of the buffer 11 via the drawing processor 10. Then, the process proceeds to S02.

In S02, the CPU 1 reads the main memory 5
The polygons 33 are superimposed on the polygons 34 at intervals based on the program and the data of the polygons 33, 34, etc., stored on the television monitor 22 and displayed on the screen of the television monitor 22 (photographed by the virtual camera C1). The polygon data when it is arranged at a position corresponding to the bottom surface of the virtual three-dimensional space is set (corresponding to first setting means). At this time, the CPU 1 also sets polygon data relating to other display objects. Then, the process proceeds to S03.

In step S03, the TB 40 determines, based on the data of the lower polygon 34 set in step S02, each point on the screen corresponding to each point constituting the polygon 34 located at a predetermined position (texture (Points on the screen to be displayed)). And R for this point
The GB value is set with reference to the data of the texture of the wave pattern developed in the non-display area of the buffer 11. Then, the set RGB values are supplied to the DB 41, and the transparency α value (α = 1) set for the point where the RGB values are set is supplied to the DB 41. Then, the process proceeds to S04. In the second and subsequent processes of S03, a point not yet selected in S03 is selected.

In S04, the DB 41 transmits the data from the TB 40 to the S
The RGB values obtained in the process of 03 are received as A1 in (Equation 1). Further, transparency α = 1 is received from the TB 40.
Then, the value of B1 in (Equation 1) is set as the value of RGB stored in the storage area of the frame buffer corresponding to the point selected in S03, and the calculation of (Equation 1) is performed. Then, the RGB values obtained as the calculation result of (Equation 1) are written in the storage area of the frame buffer from which the value of B1 has been read. Then, the process proceeds to S05.

In S05, it is determined whether the processing in S03 and S04 has been completed for all points on the screen displaying the texture of the polygon 34. At this time, if it is determined that the processing has not been completed for all points, the process proceeds to S
03 and return to steps S03 to S
05 is repeated. On the other hand, if it is determined that the processing has been completed for all points, the process proceeds to S06.
Proceed to.

When the processing has proceeded to S06, TB40
Are each point on the screen corresponding to each point constituting the polygon 33 arranged at a predetermined position (each point on the screen displaying the texture) based on the data of the upper polygon 33 set in S02. , One of the points is selected. Then, the RGB values for this point are set with reference to the texture data developed in the non-display area of the buffer 11. Then, the set RGB values are supplied to the DB 41, and the transparency α value (α = 0.5) set for the point where the RGB values are set is supplied to the DB 41. Then, the process proceeds to S07. In the second and subsequent processes in S06, points that have not yet been selected in S03 are selected. In S07, the DB 41
The RGB values obtained in the processing from TB40 to S06 are expressed by (Equation 1)
As A1. Also, from TB40, the transparency α =
Receive 0.5. Then, the R stored in the storage area of the frame buffer corresponding to the point selected in S06
The value of GB (the value of the frame buffer), that is, the RGB written in the recording area of the frame buffer in S04.
Is set as the value of B1 in (Equation 1), and the above-described interpolation equation (Equation 1) is calculated. Then, the RGB values obtained as the calculation result of (Equation 1) are written in the storage area of the frame buffer from which the value of B1 has been read. Then, the process proceeds to S05.

In S08, it is determined whether the processing in S06 and S07 has been completed for all points on the screen displaying the texture of the polygon 33. At this time, if it is determined that the processing has not been completed for all points, the process proceeds to S
Returning to step S06 to step S06 to S
Step 08 is repeated. On the other hand, if it is determined that the processing has been completed for all points, the process proceeds to S09.
Proceed to.

When the process has proceeded to S09, other processes are performed. For example, regarding the own character 30 and the enemy character 31 that are displayed on the screen other than the sea surface 28,
Processing corresponding to S03 and S04 is performed. Further, a process of writing a two-dimensional character on the screen is performed as needed. These processing results are written to the corresponding storage area of the frame buffer. And the processing is S1
Go to 0.

In S10, the drawing processor 10
The contents stored in the frame buffer are displayed and output to the television monitor 22. As a result, a game play screen displaying a virtual three-dimensional game space is displayed on the television monitor 22, and a beautiful and deep image of the sea surface 28 is displayed at a position corresponding to the bottom of the game space. (See FIG. 4). When the process of S07 ends, the display process of the sea surface ends, and the process returns to S01.

S02 in the display processing of the image of the sea surface
The processing of S10 is executed with a term of 1/60 second. At this time, the sea surface 28 moves to the near side of the screen as the game space moves. However, since the image of the polygon 33 is located closer to the camera C1 that shoots the game space than the image of the polygon 34, the image of the sea surface is moved so that the image of the polygon 33 moves more than the image of the polygon 34. Is displayed. Thus, in the image displayed on the television monitor 22, the polygon 33
The image of the sea surface 28 and the image of the sea surface of the polygon 34 appear to move separately, for example, a wave appears to flow in a complicated manner. Further, by moving each of the polygons 33 and 34 so as to be shifted in a unique direction, for example, shifting the polygon 33 to the right and shifting the polygon 34 to the left, the sea surface 28 is further shifted. It can be displayed realistically. Then, the display processing of the image of the sea surface is performed until the terrain of the game space is changed from the terrain of the sea surface 28 (for example, the game shifts from the sea stage to another stage) or the game play screen is displayed on another screen. It is executed continuously until the game screen is switched.

According to this embodiment, an image in which the sea surface 28 is synthesized by superimposing a translucent texture on an opaque texture is displayed on the screen of the television monitor 22. Therefore, an image of the sea surface 28 which is significantly more beautiful and deeper than that of the related art can be displayed on the television monitor 22. This makes it possible to attract more game players than before.

Here, the polygons 33 and 34 are set in an extremely wide range at the rearmost position as viewed from the virtual camera C1, that is, at the lowest position corresponding to the bottom of the game space. Therefore, when constructing the game space, it is easy to arrange other objects (polygons).

If the polygons 33 and 34 are fixed with respect to the virtual camera C1 and the texture attached to each of the polygons 33 and 34 is scrolled according to the movement of the camera C1, the polygons are You only need to set the part that you see on the screen.

[0057]

Second Embodiment Next, a second embodiment of the present invention will be described.
In the second embodiment, a virtual 3D image displayed on the screen of the television monitor 22 using a video game machine (see FIGS. 1 and 2) including the water surface image display device described in the first embodiment.
This is an embodiment in a case where a water surface and a fog are simultaneously displayed in a dimensional space. Therefore, the description of the common points will be omitted, and the differences will be described.

FIG. 7 is a view showing a display example of a game play screen displayed on the television monitor 22 by the video game machine according to the second embodiment. In the display example shown in FIG. 7, a virtual three-dimensional game space when viewed from a bird's-eye view is formed, and a sea surface 2 is formed at a portion corresponding to the bottom of the game space.
8 is displayed, and the fog 43 is applied to the upper half portion of the screen that forms the far side of the game space.

Next, a method for displaying an image of the sea surface according to the second embodiment will be described. FIGS. 8A and 8B are principle diagrams of a method for displaying an image of the sea surface. As shown in FIG.
8 are upper and lower polygons 44, each of which has a rectangular planar shape and a texture on which the same wave pattern is drawn.
It consists of 45. The upper and lower polygons 44 and 45 are water surface area polygons 44 a and 45, respectively, from the near side to the middle of the game space displayed on the screen of the television monitor 22.
a, and the mid-to-rear side is set as fog area polygons 44b and 45b, respectively. The texture of the upper water surface area polygon 44a is set to be translucent, and the upper fog area polygon 44a is textured.
The texture b is set such that the transparency gradually increases from the near side to the far side, and the transparency is 100% (completely transparent) at the farthest side. On the other hand, the texture of the lower water surface area polygon 45a is set to be opaque, and the texture of the lower fog area polygon 45b gradually changes to the color of the fog 43 from the near side to the far side. This is set so that the color of the fog 43 is perfect on the innermost side. These upper and lower polygons 44 and 45 are set in a state where the upper polygon 44 is superimposed on the lower polygon 45 at intervals. Then, an image obtained when the upper polygon 44 and the lower polygon 45 in this state are captured by the virtual camera C1 arranged at a bird's-eye position is synthesized and displayed on the screen of the television monitor 22, and An image is displayed as if the fog 43 was on the sea surface 28.

When displaying the sea surface 28 and the fog 43 on the screen, as in the first embodiment, the CPU 1, TB4
0 and the processing by the DB 41 (see FIG. 2). Here, as in the first embodiment, the CPU 1 sets data of the upper polygon 44 and the lower polygon 45, data of texture, primary interpolation color data, and the like.

In the second embodiment, α is used as a value indicating the degree of transparency and as a value indicating the degree of engagement of the fog 43 (the color intensity of the fog 43). Α indicating the degree of engagement of the fog 43 is set to take a value of 0 (a state where the fog is completely applied) ≦ α ≦ 1 (a state where the fog is not applied). CPU1
For the points constituting the polygon (each point on the screen displaying the texture), the fog 43
Set the degree of the effect. Further, the CPU 1 sets α indicating transparency for each point constituting the polygon.
However, the CPU 1 may be configured to read the value of α stored in the main memory 5 in advance.

The TB 40 uses the polygon data set by the CPU 1 and the data of the texture developed in the non-display area of the buffer 11, and uses R (red), G () at each point on the screen displaying this texture. Green), B
The value of (blue) is set and supplied to the DB 41.

The DB 41 stores RGB values at each point on the screen on which the texture is displayed and α indicating the set transparency.
Indicating the value of the fog 43 or the degree of engagement of the set fog 43
From the TB 40. Then, similarly to the first embodiment, the DB 41 performs the calculation of (Equation 1) described above. In the second embodiment, for the calculation of (Equation 1) relating to the water surface area polygons 44a and 45a and the fog area polygon 45a, α is set as a value indicating transparency, and B1 in (Equation 1) is set.
The RGB value of the interpolation color data set at the point on the screen that is the basis of the primary interpolation is used as the value of. On the other hand, in the calculation of (Equation 1) relating to the fog area polygon 45b, α is set as a value indicating the degree of application of the fog 43, and the value of the color (RGB) of the fog itself is set as the value of B1 in (Equation 1). Is used. Then, the calculation result of each (Equation 1) is written to the corresponding recording area of the frame buffer.

Next, a method for displaying an image of the sea surface according to the second embodiment will be specifically described. As pre-processing, the CPU 1 controls the water surface area polygons 44a and 45a, the fog area polygons 44b and 45b, the data of the texture on which the wave pattern is drawn, the values of each RGB to be used by the TB 40, and the primary interpolation color data (Equation 1). The value of α indicating the degree of transparency or α applied to the fog 43 is set.

When the setting by the CPU 1 is completed, TB4
0 uses the data of the water surface area polygon 45a and the data of the fog area polygon 45b farther from the virtual camera C1,
The RGB values at each point constituting the water surface area polygon 45a and the fog area polygon 45b are set while referring to the RGB values to be used by B40. Then, the set RGB values are supplied to the DB 41, respectively.

When the DB 41 receives the RGB values of each point on the screen from the TB 40, the DB 41 computes (Equation 1) for each point constituting the water surface area polygon 45a by the same method as in the first embodiment. I do. On the other hand, for each point constituting the fog area polygon 45b, α is set to the fog 43
Is set as a value indicating the extent of the
Set the value of 1 as the RGB value of the fog 43 itself
The calculation of (Equation 1) is performed. Then, the calculation result of each (Equation 1) is written to the corresponding storage area of the frame buffer. At this time, as shown in FIG.
The value of α for each point constituting 5a is set to α = 1 (opaque) for all points. Therefore, TB
This is the same as writing each RGB value received from 40 into the frame buffer as it is. On the other hand, the value of α for each of the points constituting the fog area polygon 45b is set such that α = 1 at the foremost side (the state where no fog is applied), and the value of α gradually increases toward the back side. Is set to β = 0 (the state where fog is completely applied) on the innermost side. Therefore, the fog area polygon 4 is stored in the corresponding storage area of the frame buffer.
An RGB value is written in such a manner as to approach the color of the fog 43 itself as it goes to the storage area corresponding to the back side of 5b.

Next, TB 40 is a water surface area polygon 44.
a, using the data of the fog area polygon 44b and referring to the data of the texture on which the wave pattern is drawn and the RGB values to be used by the TB 40,
RG at each point constituting the fog area polygon 44b
Set the value of B respectively. And each RGB set
Are supplied to the DB 41 respectively.

When the DB 41 receives the RGB values of each point on the screen received from the TB 40, the DB 41 calculates the expression (1) for the water surface area polygon 44a and the fog area polygon 44b in the same manner as in the first embodiment. Do. Then, the calculation result of each (Equation 1) is written to the corresponding storage area of the frame buffer. At this time, the value of α is as shown in FIG.
As shown in (1), for each point constituting the water surface area polygon 44a, α = 0.5 is set for all the points. For this reason, the image data combined with the water surface area polygon 45a thereunder at a half ratio is stored in the frame buffer. On the other hand, for each point of the fog area polygon 44b, α = 0.5 to α = 0.5
It is set to gradually decrease to zero. For this reason,
As the depth of the fog area polygon 44b is increased, the image data in which the color of the fog 43 of the fog area polygon 45b below the fog area polygon 45b is synthesized at a higher rate is stored in the frame buffer.

When the contents stored in the frame buffer are displayed on the screen of the television monitor 22, an image of the sea surface 28 in which the color of the fog 43 is emphasized toward the far side of the game space is displayed on the screen. (See FIG. 9). The value obtained by multiplying the transparency α of the upper water surface area polygon 44a by the value of the degree of fog engagement α set for each point constituting the lower fog area polygon 45 is 0.5. Upper fog area polygon 4
4b is set to be the value of the transparency α set for each of the points constituting 4b.

Next, the sea surface image display processing according to the second embodiment will be described. FIGS. 10 and 11 are flowcharts illustrating the image display processing of the sea surface according to the second embodiment.
This image display processing is performed by, for example, the television monitor 22.
When a start button 21b is pressed and a display command for a game play screen is input to the CPU 1 in a state where a title screen (not shown) is displayed, a sea scene (stage) starts.

In S101, the CPU 1 determines the texture (wave pattern, own character 3) required for drawing the sea stage.
0, textures of the enemy character 31 and the like are read from the main memory 5 and are developed in the non-display area of the buffer 11 via the drawing processor 10. Then, the process proceeds to S102.

In S102, the CPU 1 executes the program stored in the main memory 5, the upper and lower polygons 44 and 45.
And the like, the polygon 44 is superimposed on the polygon 45 at intervals based on data such as
The polygon data when placed at a position corresponding to the bottom surface of the virtual three-dimensional space displayed on the screen 2 (photographed by the virtual camera C1) is set (corresponding to a first setting unit). At this time, the CPU 1 also sets polygon data for other display objects. Then, the process proceeds to S10.
Proceed to 3.

In S103, the TB 40 determines whether the fog area polygon 4b placed at a predetermined position is based on the data of the lower fog area polygon 45b set in S102.
Any one of the points constituting 5b is selected. Then, RGB values for this point are set with reference to the texture data developed in the non-display area of the buffer 11, and are supplied to the DB 41. Then, the process proceeds to S10.
Proceed to 4. In the second and subsequent processes in S103, a point that has not yet been selected in 103 is selected.

In S104, the DB 41 receives the RGB values obtained in the processing of S103 from the TB 40 as A1 in (Equation 1). Further, the DB 41 acquires the value of α indicating the degree of engagement of the fog 43 set for the point selected in S103. Further, the value of B1 in (Equation 1) is changed to the color of the fog 43 itself (RG
B), and the calculation of the above (Equation 1) is performed. Then, the RGB values obtained as the calculation result of (Equation 1) are written to the corresponding storage areas of the frame buffer. The value of α for the lower fog area polygon 45b is set so as to approach 1 as it goes deeper. And the processing is S
Proceed to 105.

In S105, the points constituting the lower fog area polygon 45b (points on the screen displaying the texture)
It is determined whether the processing of S103 and S104 has been completed for all of the above. At this time, if it is determined that the processing has not been completed for all points, the process returns to S103,
The processing of S103 to S105 is repeatedly performed until the processing is completed for all points. On the other hand, if it is determined that the processing has been completed for all points, the process proceeds to S106.

In steps S106 to S108, the lower water surface area polygon 45a is subjected to steps S03 to S108 in the first embodiment.
The same processing as the processing of S05 is performed. Therefore, the description is omitted. Then, when a determination of YES is made in S108, the process proceeds to S109.

If the processing has proceeded to S109, TB4
0 selects any one of the points constituting the fog area polygon 44b arranged at a predetermined position based on the data of the upper fog area polygon 44b set in S102. Then, RGB values for this point are set with reference to the texture data developed in the non-display area of the buffer 11, and are supplied to the DB 41.
Then, the process proceeds to S109. In addition, S after the second time
In the process at 109, a point not yet selected at 109 is selected.

In S110, the DB 41 receives the RGB values obtained in the processing of S110 from the TB 40 as A1 in (Equation 1). Further, the DB 41 acquires the value of α indicating the degree of transparency set for the point selected in S110. Further, the value of B1 in (Equation 1) is set as the value of RGB stored in the storage area of the frame buffer corresponding to this point, and the above-described calculation of (Equation 1) is performed. Then, the RGB values obtained as the calculation result of (Equation 1) are written in the corresponding storage area of the frame buffer from which the value of B1 has been read. Note that the value of α relating to the upper fog area polygon 44b is set so as to approach 0 as it goes deeper. Then, the process proceeds to S111.

In S111, the points constituting the upper fog area polygon 44b (points on the screen displaying the texture)
It is determined whether or not the processing of S109 and S110 has been completed for all of. At this time, if it is determined that the processing has not been completed for all points, the process returns to S109,
The processing of S109 to S111 is repeatedly performed until the processing is completed for all points. On the other hand, if it is determined that the processing has been completed for all points, the process proceeds to S112.

In S112 to S114, the upper water surface area polygon 44a is subjected to S06 to S114 in the first embodiment.
The same processing as the processing of S08 is performed. Therefore, the description is omitted. Then, when a determination of YES is made in S114, the process proceeds to S115.

When the process proceeds to S115, other processes are performed as in the first embodiment. These processing results are written to the corresponding storage area of the frame buffer. Then, the process proceeds to S116.

In S116, the drawing processor 10
Output the contents stored in the frame buffer to the television monitor 22. As a result, a game play screen on which a virtual three-dimensional game space is displayed is displayed on the television monitor 22, and a beautiful and deep sea surface 2 is provided at a position corresponding to the bottom of the game space.
8 is displayed, and an image in which the fog 43 is gradually applied strongly from the middle to the back of the game space is displayed (see FIG. 7). When the process of S116 ends, the sea surface display process ends, and the process returns to S101.

According to the second embodiment, similarly to the first embodiment, the sea surface 28 which is significantly more beautiful and deeper than the conventional one is provided.
Can be displayed on the television monitor 22. Further, even if the video game machine cannot simultaneously perform the translucent processing and the fog processing on one texture due to hardware restrictions, the television monitor 2
2, the translucent sea surface 28 and the fog 43 can be displayed simultaneously.

Further, the implementation of the water surface image display device according to the present invention is not limited to a video game machine which executes a shooting game, but may be, for example, a video game machine which executes an action game, a role playing game, an adventure game, a puzzle game, or the like. Or virtual 3 displayed on the screen
The present invention can be implemented for a computer device or the like that displays a water surface in a three-dimensional space. It does not matter whether the video game machine or the computer device is for home use or for business use.

[0085]

According to the water surface image display apparatus of the present invention, the image display method thereof, and the machine-readable recording medium on which the computer program is recorded, the water surface image can be expressed in a simpler and more realistic expression form than before. Can be displayed.

Further, according to the second aspect of the present invention, it is possible to display a real image of a fogged water surface with a simple configuration. In this case, even in a computer device that cannot simultaneously use the translucent process and the fog process for one texture, the translucent water surface and the fog can be simultaneously displayed on the screen.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a video game machine equipped with a water surface image display device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a drawing processor;

FIG. 3 is a flowchart showing processing of a TB and a DB;

FIG. 4 is a diagram showing a display example of a game play screen in the first embodiment.

FIG. 5 is a principle diagram of a method for displaying an image of a water surface according to the first embodiment.

FIG. 6 is a flowchart illustrating a process of displaying an image of a sea surface according to the first embodiment.

FIG. 7 is a diagram showing a display example of a game play screen according to the second embodiment.

FIG. 8 is a principle diagram of a method for displaying an image of a sea surface according to the second embodiment.

FIG. 9 is a principle diagram of a method for displaying an image of a sea surface in the second embodiment.

FIG. 10 is a flowchart illustrating a process of displaying an image of a sea surface according to the second embodiment.

FIG. 11 is a flowchart illustrating a sea surface image display process according to the second embodiment.

[Explanation of symbols]

 Reference Signs List 1 CPU 3 Graphics data generation processor 5 Main memory 10 Drawing processor 22 Television monitor 23 CD-ROM 28 Sea level 33, 34, 44, 45 Polygon 40 Texture blender (TB) 41 Destination blender (DB) 43 Fog

Claims (9)

[Claims] 1. An apparatus for displaying an image of a water surface set in a virtual three-dimensional space on a screen, comprising: image information storage means for storing image information of a texture on which a water surface pattern is drawn; Polygon data storage means for storing data of the two polygons to be obtained; and attaching the texture to the two polygons based on the image information of the texture and the data of the two polygons. First setting means for arranging the texture in the virtual three-dimensional space in a state of being overlapped with an interval above and below, and second setting means for setting the texture image pasted on the polygon arranged on the upper side as translucent And an image of a texture pasted on the two polygons set by the first setting means and the second setting means The image display device of the water surface, characterized in that an output means for displaying output to the screen. 2. An apparatus for displaying an image of a water surface set in a virtual three-dimensional space on a screen, comprising: image information storage means for storing image information of a texture on which a water surface pattern is drawn; Polygon data storage means for storing data of the two polygons to be obtained; and attaching the texture to the two polygons based on the image information of the texture and the data of the two polygons. First setting means for arranging in the virtual three-dimensional space in a state of being overlapped with an interval vertically, and a virtual three-dimensional space in which an image of a texture pasted on a polygon arranged on an upper side is displayed on the screen The transparency is set to increase from the middle to the back side, and the text attached to the polygon placed at the bottom is set. Second setting means for setting the image of the texture in a state in which fog is applied strongly from the middle to the back of the virtual three-dimensional space displayed on the screen; and setting by the first setting means and the second setting means Output means for displaying and outputting on the screen an image of the texture pasted on the two polygons thus obtained. 3. The water surface image display device according to claim 1, wherein a texture on which the same water surface pattern is drawn is attached to said two polygons. 4. The virtual three-dimensional space is set so as to move toward the near side of the screen, and in accordance with the movement of the virtual three-dimensional space, the texture images respectively pasted on the two polygons are changed. The water surface image display device according to any one of claims 1 to 3, wherein the water surface image display device is set so as to individually move toward the front side of the screen. 5. The transparency according to the degree of fog applied to the image of the texture pasted on the polygon disposed on the lower side is determined by the degree of the fog applied to the polygon disposed on the upper side. The water surface image display device according to claim 2, wherein the water surface image display device is set for an image. 6. A method of displaying an image of a water surface set in a virtual three-dimensional space on a screen, comprising reading out image information of a texture on which a water surface pattern is drawn, and data of two polygons to which the texture is pasted. Based on the image information of the texture and the data of the two polygons, the texture is pasted on the two polygons, respectively, and the two polygons are superimposed at intervals above and below the virtual polygon. It is arranged in a three-dimensional space, the texture image pasted on the polygon arranged on the upper side is set as translucent, and the texture image pasted on the two set polygons is displayed and output on the screen. A method for displaying an image of a water surface, comprising: 7. A method for displaying an image of a water surface set in a virtual three-dimensional space on a screen, comprising reading out image information of a texture on which a water surface pattern is drawn, and data of two polygons to which the texture is pasted. Based on the image information of the texture and the data of the two polygons, the texture is pasted on the two polygons, respectively, and the two polygons are superimposed at intervals above and below the virtual polygon. The image is placed in the three-dimensional space, and the texture image pasted on the polygon placed on the upper side is set in such a manner that the transparency increases from the middle to the far side of the virtual three-dimensional space displayed on the screen. , The image of the texture pasted on the polygon arranged on the lower side is displayed in the middle of the virtual three-dimensional space displayed on the screen. A water surface image display method comprising: setting the fog to be applied more intensely toward the back side; and outputting the image of the texture pasted to the two set polygons on the screen. 8. A machine-readable recording medium recording a computer program for causing a computer to execute a process of displaying and outputting an image of a water surface set in a virtual three-dimensional space on a screen, wherein the computer draws a water surface pattern. Reading the image information of the texture that has been obtained, reading the data of the two polygons to which the texture is pasted, and adding the two polygons based on the image information of the texture and the data of the two polygons. Placing each texture in the virtual three-dimensional space in a state where the two polygons are superimposed at an interval above and below; and Step of setting as translucent and pasting on the two set polygons Recorded machine-readable recording medium a program for the image of the texture which is to execute a step of displaying output to the screen. 9. A machine-readable recording medium storing a computer program for causing a computer to execute a process of displaying and outputting an image of a water surface set in a virtual three-dimensional space on a screen, wherein the computer draws a water surface pattern. Reading the image information of the texture that has been obtained, reading the data of the two polygons to which the texture is pasted, and adding the two polygons based on the image information of the texture and the data of the two polygons. Disposing the two polygons in the virtual three-dimensional space in a state where the two polygons are vertically overlapped with an interval therebetween; and attaching the texture image pasted on the polygon disposed on the upper side to the texture. Transparent from the middle to the back of the virtual 3D space displayed on the screen Is set in a state of rising, and the image of the texture pasted on the polygon arranged on the lower side is set in a state where fog is applied more strongly from the middle of the virtual three-dimensional space displayed on the screen to the back side. And a step of displaying and outputting, on the screen, an image of the texture pasted on the two set polygons, a machine-readable recording medium storing a program for executing the program.