JP3755598B2 - Game program with smoke expression - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a game program having smoke expression that can accurately express smoke such as a plurality of bullets.
[0002]
[Prior art]
Conventionally, in a battle scene or the like, as a method of easily expressing explosion smoke formed when a bullet such as an artillery gun or cannon bursts in the air, that is, smoke such as bullet smoke, using a three-dimensional CG, bullet The technique of mapping the picture is used.
[0003]
Recently, in 3D CG, cel animation style expression using toon shading is prevalent, and in such a case, the above-mentioned smoky picture is displayed around the smoky 30, for example, as shown in FIG. As shown, a technique for drawing the outline 31 is used.
[0004]
[Problems to be solved by the invention]
However, when the contour line 31 is written by such a method, if a plurality of bullets 30 are to be expressed on the display, each bullet image (hereinafter referred to as a “single bullet image”) 32 in which the contour line 31 is drawn. Are overlapped to form as shown in FIG.
[0005]
When the bullets 30 and 30 ′ are generated at a distance from each other, the bullets 30 and 30 ′ are generated in the space independently of each other, so that there is no problem in the expression of FIG. 4B. . However, when they are formed in close proximity to each other, the smoke particles in the real world are mixed with each other, and the boundary between the bullets is eliminated. As shown in FIG. 5 (b), the bullets 30 and 30 ′ should be merged into a large fused bullet 33. However, in the method of simply forming the contour line 31 for each of the munitions 30 and 30 ′, the contour line 31 of the overlapping portion DP where the munitions 30 and 30 ′ of FIG. Is given to the player. Accordingly, in the case where the bullets 30 and 30 ′ are formed close to each other, as shown in FIG. 5B, the outline 31 of the overlapping portion DP between the bullets 30 and 30 ′ is generated. It is necessary to perform image processing so as not to be performed, and development of a game program capable of such processing has been desired.
[0006]
In view of the circumstances described above, an object of the present invention is to provide a game program having a smoke expression that can accurately generate the smoke contour in accordance with the generation state of smoke such as bullet smoke. is there.
[0007]
[Means for Solving the Problems]
The invention of claim 1 provides the computer (1) with:
A smoke model (19) in which the smoke texture (19a) is mapped to the first polygon (19b), and a contour texture (20b) having a lighter color than the smoke texture are mapped to the second polygon (20a). A smoke generation model set having an outline model (20) is placed at a predetermined distance (L) in the object space (17), and the outline model is relative to the viewpoint (16) of the smoke model. Model set placement procedure to be placed in the rear position,
A rendering procedure for rendering the smoke generation model set based on the viewpoint to generate a smoke image (32, 33) outlined by the contour texture around the smoke texture;
A display control procedure for controlling the display of the smoke image generated by the rendering procedure on the display (11);
A game program with smoke expression for execution
The distance (L) between the smoke model and the contour model in the smoke generation model set is set to a smoke fusion limit distance (LM), which is a limit at which a plurality of smoke particles generated in the object space are mixed with each other. Has been
The rendering procedure is calculated such that smoke generated by arranging a plurality of smoke generation model sets arranged by the model set arrangement procedure occurs at a position where the smoke overlaps in the Z-axis direction with respect to the viewpoint. When the distance between the plurality of smoke generation model sets is equal to or less than the smoke fusion limit distance, the smoke models constituting the smoke generation model sets are defined as contour lines by the contour line model between the smoke textures. A smoke texture fusion rendering procedure that renders in a fused form without intervention;
The rendering procedure generates a smoke image delineated by the contour line texture around the fused smoke texture rendered by the smoke texture fusion rendering procedure;
It is configured as a feature.
[0008]
Although the first and second polygons are advantageously single-plate polygons in terms of reducing the computational load and reducing modeling work, the present invention is not necessarily limited to single-plate polygons. For example, the first and / or second polygon can be configured by a three-dimensional model composed of a plurality of polygons.
[0010]
According to a second aspect of the present invention, in the game program having the smoke expression according to the first aspect, the smoke texture (19a) exhibits the shape and color of the bullet (30) formed when a firearm bullet bursts. It is constructed with the feature of a bullet smoke texture.

[0011]
According to a third aspect of the present invention, in the game program having the smoke expression according to the first aspect, the outline texture of the smoke generation model set is formed in a shape substantially similar to the shape of the corresponding smoke texture, and has an overall size. Is configured to be larger than the smoke texture.
[0012]
【The invention's effect】
According to claim 1, rendering is performed in such a manner that a contour line model to be a contour of smoke such as bullet smoke is disposed rearward by a predetermined distance (L) with respect to the viewpoint (16) by the model set placement procedure. Since the rendering is performed by the procedure, the smoke model (19) of another smoke (30 ′) can be arranged between the smoke model (19) and the contour model (20), and a plurality of smoke (30 , 30 ') can be accurately performed according to the arrangement position.
[0013]
Further, the distance (L) between the smoke model and the contour line model is set to the smoke fusion limit distance (LM), which is a limit at which a plurality of smoke particles generated in the object space are mixed with each other. If the other smoke smoke generation model set is arranged within the smoke fusion limit distance (LM), the smoke model of either one of the smokes is the smoke model and the contour model for the other smoke. And the smoke model overlaps the Z axis direction of the viewpoint 16 without passing through the contour model. This makes it possible to render multiple smoke models in a form that fuses each other's smoke texture without interposing a contour line, and creates a natural representation of smoke expressions such as close-up bullets. Can be done.
[0014]
According to claim 2 , the smoke texture (19a) is a bullet texture that exhibits the shape and color of the bullet (30) that is formed when the bullet of the firearm bursts. It can be displayed properly.
[0015]
According to claim 3 , the contour texture of the smoke generation model set is formed in a shape substantially similar to the shape of the corresponding smoke texture, and the overall size is formed larger than the smoke texture, Even if the contour model is arranged behind the smoke model, the contour can be rendered in an appropriate manner around the smoke texture.
[0016]
Note that the numbers in parentheses are for the sake of convenience indicating the corresponding elements in the drawings, and therefore the present description is not limited to the descriptions on the drawings.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0018]
FIG. 1 is a block diagram of a consumer game machine to which the present invention is applied, FIG. 2 is a diagram illustrating an example of a model used when generating a contoured bullet image, (a) a smoke model, (B) is a schematic diagram showing an outline model, FIG. 3 (a) is a diagram showing an example of an arrangement state of a model in an object space when a single smoke image is generated, and FIG. 3 (b) is a single figure. FIG. 4A is a schematic diagram illustrating an example of a bullet image, FIG. 4A is a diagram illustrating an example of an arrangement state of a model in an object space when generating a plurality of single bullet images, and FIG. 4B is a bullet FIG. 5A is a schematic diagram illustrating an example of an image, FIG. 5A is a diagram illustrating an example of an arrangement state of a model in an object space when generating a fused bullet image, and FIG. 5B is an example of a fused bullet image. It is a schematic diagram which shows.
[0019]
As shown in FIG. 1, the game machine 1 as a computer has a CPU 2 mainly composed of a microprocessor unit. A ROM 4 and a RAM 5 as main storage devices are connected to the CPU 2 via a bus 3. The ROM 4 stores an operating system as a program necessary for overall operation control of the game machine 1 and data necessary for its execution. The RAM 5 stores a game program and data read from a CD-ROM 6 as a storage medium via a CD-ROM reader 7. In the RAM 5, an area for temporarily storing various information necessary for the progress of the game is set according to a program read from the CD-ROM 6. Further, the image data read from the CD-ROM 6 and processed by the CPU 2 is also recorded in a predetermined video area secured in the RAM 5. A RAM dedicated to display processing may be provided separately. The game program may be supplied by a semiconductor memory, a DVD-ROM, or other various storage media instead of the CD-ROM 6.
[0020]
In addition, an image processing device 8 and a sound processing device 9 are connected to the CPU 2 via the bus 3. The image processing device 8 reads the image data from the video area of the RAM 5 and draws the game screen on the frame memory 10, and converts the drawn image into a video signal for displaying on the display 11 to give a predetermined timing. To output. The sound processing device 9 converts sound data on the CD-ROM 6 read by the CD-ROM reader 7 into a predetermined analog sound signal and outputs it from the speaker 12. In addition, the sound processing device 9 generates sound effect data and musical sound data in accordance with an instruction from the CPU 2, converts the data into an analog signal, and outputs the analog signal from the speaker 12. As the display 11 and the speaker 12, a household television receiver and a speaker attached thereto are generally used.
[0021]
A controller 14 and an external memory 15 are detachably connected to the bus 3 via an interface 13. The controller 14 is provided with an operation member that receives an operation by the player. For example, a cross key 14a, a push button switch 14b,... The controller 14 outputs a signal corresponding to the operation state of the operation members 14a and 14b at a constant period (for example, 1/60 seconds), and the CPU 2 determines the operation state of the controller 14 based on the signal. The external memory 15 has, for example, a semiconductor memory element that can be rewritten and can store data, and data indicating the progress of the game is recorded there in accordance with an instruction from the player. The external memory 15 may be provided as an element constituting a portable game machine that can be attached to and detached from the interface 13, for example.
[0022]
A program and data for executing a game on the display 11 are stored on the CD-ROM 6. In the game machine 1, when a predetermined initialization operation (for example, a power-on operation) is performed, the CPU 2 first executes a predetermined initialization process according to a program in the ROM 4. When the initialization is completed, the CPU 2 starts reading the game program GPR stored on the CD-ROM 6 and starts game processing according to the program. When the player performs a predetermined game start operation on the controller 14, the CPU 2 starts various processes necessary for executing the game according to the procedure of the game program GPR based on the instruction.
[0023]
Thereafter, the game machine 1 performs a predetermined process in accordance with the game program GPR, performs display control of an image displayed on the display 11, and controls the progress of the game on the screen. In the game, when there is a battle scene using a firearm such as a cannon or a high-fire gun, a firearm display program GSP which is a subroutine of the game program GPR is read and executed by the CPU 2, and based on the firearm display program GSP. Then, in the battle scene, the smoke from the fired bullets exploding in the air is displayed on the display 11.
[0024]
In the firearm display program GSP, the CPU 2 executes a bullet generation timing determination program SMP stored as a subroutine of the firearm display program GSP, and the player operates the controller 14 with the bullet generation timing program SMP. It is determined whether or not a fire command RC is output to the CPU 2 to instruct to fire a bullet from a firearm in a battle scene in the game by an automatic fire program ARP which is a subroutine in the firearm display program GSP. To do.
[0025]
When it is determined that the firing command RC is output to the CPU 2, the CPU 2 generates a corresponding image in the three-dimensional object space (world coordinate system) based on the firearm firing display program GSP. Thus, an image in which a bullet is fired from a firearm is displayed on the display 11 via the image processing device 8. At the same time, the smoke generation timing program SMP enters the next step, reads out the firearm data for which the firing command RC is issued from the firearm parameter data GPD stored in the game program GPR, and reads the read firearm parameter data. Based on the GPD, the position and time of the generated smoke in the three-dimensional object space are similarly calculated based on the position of the firearm placed in the object space and the firing time of the bullet. Since these detailed methods already have various known methods, detailed descriptions thereof are omitted individually.
[0026]
Thus, when the position and time of the generated smoke in the three-dimensional object space are calculated based on the position of the firearm arranged in the object space and the firing time of the bullet, the CPU 2 Based on the display program GSP, the operation of generating a smoke image is started.
[0027]
As shown in FIG. 3 (a), the firearm display program GSP displays the smoke model 19 at the calculated generation position of the smoke 30 in the object space 17 with respect to the viewpoint 16 arranged in the object space. The contour line model 20 is placed at a position away from the smoke model 19 by a fixed distance L from the smoke model 19 in the Z-axis direction of the viewpoint 16 (Z-axis in screen coordinates, the same applies hereinafter). They are arranged in parallel to the smoke model 19 and overlap each other in the Z-axis direction. As shown in FIG. 2A, the smoke model 19 is obtained by mapping a smoke texture 19a exhibiting the shape and color of bullets on a single-plate polygon 19b, and the contour model 20 is shown in FIG. As shown in b), a contour texture 20a made of a solid color of lighter color than the bullet smoke texture 19a, for example, black solid color, is mapped onto a single-plate polygon 20a. The contour texture 20a is formed in a shape substantially similar to the shape of the corresponding bullet smoke texture 19a, but the overall size is formed larger than the bullet smoke texture 19a.
[0028]
The smoke generation model set 35 including the smoke model 19 and the contour line model 20 can be classified into a plurality of types according to the types of firearms used in the game program GPR. Are stored as smoke data SDA in the game program GPR, and are read out from the smoke data SDA according to the type of firearm for which the firing command RC is issued (and more than one type for the same firearm). A single smoke data SDA is read out from the smoke data SDA randomly or according to a predetermined rule) and arranged in the three-dimensional object space. As a result, a more realistic bullet image can be generated.
[0029]
Thus, when the smoke generation model set 35 corresponding to the type of firearm for which the firing command RC is issued is arranged in the three-dimensional object space 17, the firearm firing display program GSP is separated by a distance L1 in the Z-axis direction. An image from the viewpoint 16 arranged at the position is generated by rendering and displayed on the display 11 via the image processing device 8, and the image is obtained from the bullet texture 19a as shown in FIG. The contour textures 20a formed larger than each other overlap to form a clear single munition image in which the contour line 31 is bordered around the munition 30.
[0030]
As already described, the contour texture 20a is arranged behind the viewpoint 16 by a certain distance L of the bullet texture 19a, and the contour texture 20a is formed larger than the corresponding bullet texture 19a. In the rendered image from, the outline 31 is clearly expressed around the bullet 30 by the outline texture 20a.
[0031]
When bullets are fired from a plurality of firearms, a plurality of bullets 30 and 30 'are formed. In this case, the bullets generated for each bullet of each firearm in the three-dimensional object space 17 are formed. The position and time are calculated by the smoke generation timing program SMP and the corresponding smoke generation model sets 35 and 35 ′ are arranged in the three-dimensional object space 17 by the firearm display program GSP in the same procedure as described above. Is done.
[0032]
At this time, if the distances in the Z-axis direction where the respective smokes 30 and 30 ′ are generated are separated by a predetermined distance L or more, each of the smokes 30 and 30 in the Z-axis direction by the smoke generation timing program SMP. Even if it is calculated that smoke is generated at the position where “overlaps”, the smoke particles of the respective smoke 30 and 30 ′ are not mixed with each other, as shown in FIG. 4 (b). 30 and 30 ′ are desirably displayed on the display 11 in an independent form as a single smoke image 32.
[0033]
Therefore, when a plurality of smokes 30 and 30 ′ are generated, the distance L between the smoke model 19 and the contour line model 20 in the above-described smoke generation model set 35 used when generating the smoke 30 is generated. The limit distance at which the smoke particles are mixed with each other, that is, the bullet fusion limit distance LM is set. Thereby, in order to generate bullets 30 and 30 ′ generated by explosion of bullets fired from a plurality of firearms, a plurality of smoke generations arranged in the three-dimensional object space 17 by the firearm display program GSP. As shown in FIG. 4A, when the distance L2 between the model sets 35 and 35 'is larger than the smoke fusion limit distance LM, the smoke 30' behind the Z-axis coordinate is forward of the Z-axis coordinate. The smoke model 19 ′ is arranged behind the contour model 20 of the bullet 30.
[0034]
Then, by rendering from the viewpoint 16, the smoke model 19 ′ that forms the rear bullet 30 ′ appears to be located behind the contour line model 20 that forms the front bullet 30. 30 and 30 ', as shown in FIG. 4 (b), the front bullet 30 is contoured in a manner independent of the rear bullet 30', and the rear bullet 30 ' It is contoured in a form independent of the munitions, and the images of the munitions 30 and 30 ′ are separately generated as a single munition image 32 without being mixed and displayed on the display 11 via the image processing device 8. Is done.
[0035]
Next, when the smoke generation timing program SMP calculates that smoke is generated at the position where the smoke 30 and 30 'overlap each other in the Z-axis direction, the distance generated by each of the smoke 30 and 30'. When L2 is equal to or less than the smoke fusion limit distance LM, the smoke particles of the respective smokes 30 and 30 ′ are mixed, and as shown in FIG. 5B, each of the smokes 30 and 30 ′. Is preferably displayed on the display 11 in the form of a fused munition 33 that is integrally fused.
[0036]
In this case, the distance L2 between the plurality of smoke generation model sets 35 and 35 ′ arranged in the three-dimensional object space 17 by the firearm display program GSP is shown in FIG. The smoke generation model set 35, 35 'is smaller than the smoke fusion limit distance LM, which is the distance L between the smoke model 19 and the contour line model 20, and represents the bullet 30' behind the Z-axis coordinate. The smoke model 19 ′ is between the smoke model 19 and the contour model 20 of the smoke 30 in front of the Z-axis coordinates, and the contour model 20 ′ is behind the contour model 20 in the Z-axis direction. , Each will be arranged in a partially overlapping form. That is, when viewed from the viewpoint 16, the smoke models 19 and 19 'and the contour models 20 and 20' are arranged in the Z-axis direction in this order.
[0037]
Then, the bomb smoke model 19 of the bomb 30 in front of the Z axis and the bomb smoke model 19 ′ of the rear bomb 30 ′ are partially overlapped by rendering from the viewpoint 16, and the fused smoke 33 is totally formed. Further, the periphery of the fusion munitions 23 is contoured by the contour line models 20 and 20 ′ located behind the surface. At this time, the portion where the smoke model 19, 19 ′ overlaps is not represented by the hidden surface removal of the contour model 20, 20 ′ behind the contour model 31. Properly formed. The image processing apparatus 8 displays the image thus formed on the display 11.
[0038]
In the above embodiment, the CPU 2 or the like constitutes a game control device, and various means of the game control device are constituted by a combination of the CPU 2 or the like and specific software. At least some of these means are logical. A circuit may be substituted.
[0039]
Moreover, although the above-mentioned Example demonstrated the game program which expresses the bullet when the bullet of a firearm explodes, this invention is not limited to a firearm, but what kind of smoke, such as the smoke accompanying explosion of a bomb, etc. It can also be applied to smoke expressions.
[0040]
The present invention is not limited to a home game system, and is configured as a game system of various scales such as a program for a commercial game machine, a game program for a personal computer, or a program for a portable game machine having a 3D function. Good.
[0041]
[Brief description of the drawings]
FIG. 1 is a block diagram of a consumer game machine to which the present invention is applied.
FIGS. 2A and 2B are diagrams illustrating an example of a model used when generating a smoke image with a contour line. FIG. 2A is a schematic diagram illustrating a smoke model, and FIG. 2B is a schematic diagram illustrating a contour model. .
FIG. 3A is a diagram illustrating an example of an arrangement state of a model in an object space when a single smoke image is generated, and FIG. 3B is a schematic diagram illustrating an example of a single smoke image. FIG.
FIG. 4A is a diagram illustrating an example of a model arrangement state in an object space when generating a plurality of single smoke images, and FIG. 4B is a schematic diagram illustrating an example of a smoke image. FIG.
FIG. 5A is a diagram showing an example of an arrangement state of a model in an object space when generating a fused bullet image, and FIG. 5B is a schematic diagram showing an example of a fused bullet image. It is.
[Explanation of symbols]
1 …… Computer (game machine)
11 …… Display 17 …… Object space 19 …… Smoke model (bullet model)
19a …… Smoke texture (bullet smoke texture)
19b, 20a ... Polygon 20 ... Contour line model 20b ... Contour texture 32 ... Smoke image (bullet image)
33 …… Smoke image (fused bullet)
L …… Distance LM …… Smoke fusion limit distance (bullet smoke limit distance)

Claims (3)

On the computer,
A smoke generation model set having a smoke model in which a smoke texture is mapped to a first polygon and a contour line model in which a contour texture having a lightness lower than that of the smoke texture is mapped to a second polygon. A model set placement procedure in which the contour model is placed behind the viewpoint of the smoke model, with a predetermined distance from
A rendering procedure for rendering the smoke generation model set based on the viewpoint to generate a smoke image outlined by the contour line texture around the smoke texture;
A display control procedure for controlling the display of the smoke image generated by the rendering procedure on a display;
A game program with smoke expression for execution
The distance between the smoke model and the contour line model of the smoke generation model set is set to a smoke fusion limit distance, which is a limit where a plurality of smoke particles generated in the object space are mixed with each other,
The rendering procedure is calculated such that smoke generated by arranging a plurality of smoke generation model sets arranged by the model set arrangement procedure occurs at a position where the smoke overlaps in the Z-axis direction with respect to the viewpoint. When the distance between the plurality of smoke generation model sets is equal to or less than the smoke fusion limit distance, the smoke models constituting the smoke generation model sets are defined as contour lines by the contour line model between the smoke textures. A smoke texture fusion rendering procedure that renders in a fused form without intervention;
The rendering procedure generates a smoke image delineated by the contour line texture around the fused smoke texture rendered by the smoke texture fusion rendering procedure;
A game program having a smoke expression.   The game program having smoke expression according to claim 1, wherein the smoke texture is a bullet smoke texture exhibiting the shape and color of bullets formed when a bullet of a firearm bursts.   The outline texture of the smoke generation model set is formed in a shape substantially similar to the shape of the corresponding smoke texture, and the overall size is formed larger than the smoke texture. A game program having the smoke expression according to 1.

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