JP4219313B2 - Shade concentration method when coloring a 3D model - Google Patents

Description

  The present invention relates to a shade concentration method in a game apparatus capable of determining a color and adjusting the shade density when customizing a color of a three-dimensional shape in, for example, character making of a consumer game machine.

  When customizing colors with a conventional game device, the shade density is set to a predetermined density simply by selecting from several color palettes or by adjusting the RGB components of the three primary colors. There was fixed.

The applicant of the present invention has proposed a color customization for a character as the conventional example (Patent Document 1).
This allows the player to select the character color of the character from several colors to create parameters such as the character's ability, and does not mention any shade.
In addition, there is a game machine that performs a variation display game in which a plurality of identification information is variably displayed in a plurality of variation display areas of a display device, in which a color pattern and a shade pattern attached to a decoration element are changed (Patent Document 2). ). This is not to gradually change the shade density to cause the shade, but to use the magnitude of the shade density in association with the change speed of the identification information.
JP 2002-306840 A JP 2002-239130 A

  When a three-dimensional character or item appears in a game, the colored portion is not attractive when the shade density is constant. What kind of texture the shaded part can be seen will lead to further excitement of the content of the game. Therefore, it is important for raising the texture of a character or the like that a certain part of the character or item looks like a metal or looks fluorescent.

  The object of the present invention is to customize not only the color but also the shade density in customizing the color of the three-dimensional shape, so that the selected character can be expressed as a self-luminous fluorescent color or reflected. It is an object of the present invention to provide a shade concentration method for coloring a three-dimensional model that can express a metal with a high rate.

In order to achieve the above object, claim 1 of the present invention is a game apparatus having a function capable of coloring a three-dimensional shape object, wherein the selection means for displaying a three-dimensional shape object and selecting a portion to be colored is selected. The color input means for designating the color of the selected part, the density input means for inputting the shade density of the selected part, the data of the designated color and shade density, and the light source data are expressed by equation (1). A calculating means for calculating the surface color of the selected part and a drawing means for drawing the selected part based on the data obtained by the calculating means, and the shade density can be adjusted together with the coloring of the selected part. And
C = (1-k) · C _B + k · C _B · I (1)
Where k: shade density
C _B : Basic color (R, G, B)
I: Luminance value obtained by light source calculation
According to a second aspect of the present invention, in the invention according to the first aspect, the density of the shade is 0.0 as the density at which no shade is generated, the maximum density is 1.0, and the range of 0.0 to 1.0 is input by the density input means. If the normal vector and the light source direction vector of the surface of the site with respect to the light source matches the angle between the normal vector and the light source direction vector of the plane is 0 degrees, the light source direction vector with respect to the normal vector The brightness of the surface is defined so as to change with a trigonometric curve until 90 degrees, and the angle between the light source direction vector and the normal vector can be set to a predetermined value.
Claim 3 of the present invention displays the model on the color designation and shade density input screen in the invention of claim 1 or 2, and sets the input value when the color is designated on the input screen and when the shade density is entered. It is characterized by changing the color and shade density of the model to correspond.

According to the above configuration, not only color tone but also shade density can be adjusted in color customization, and the difference in texture can be expressed. The shade density adjusts how dark the surface facing the direction of the light source is dark. The shade is thinned to make it appear like a fluorescent color, or the shade is darkened to express a metallic appearance. Can do.
In the present invention, the shade density can be adjusted by one parameter.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic diagram showing a configuration of a game apparatus to which a shadow density method for coloring a three-dimensional model according to the present invention is applied.
A game machine 2 is connected to the display 1 and the character or item appearing in the game, or even the character 8 created by the user, is called into the area 7 for customization, and color adjustment and shadow density adjustment are performed by the operation pad 3. Can do.

The operation pad 3 has a cross button 4 on the left side, four buttons 5 for determining, drawing, ending, returning, and the like on the right side, and further, analog sticks 9a and 9b.
The game can be progressed by operating the button 5 or the cross button 4. In this example, the three-dimensional character 8 is displayed on the game screen 6 and the part 8a is selected.
Color and shade density customization can be performed by opening the customization area 7 during the game. It can also be done at the start of the game.

FIG. 2 is a block diagram showing an embodiment of the circuit of the game device according to the present invention. This figure shows only the circuit part directly related to the present invention, and other parts are omitted.
A display 1 and an operation pad 3 are connected to the game machine 2. The cross button 4 on the operation pad 3 can move the cursor up and down, left and right, and can select a menu displayed in large numbers in order. The four buttons 5 are buttons for realizing functions such as determination, drawing, ending, and returning when the game proceeds. The analog stick 9a moves a dropper (cursor) for selecting a color to an arbitrary position, and the analog stick 9b is used for drawing a line.
By performing a predetermined operation with the operation pad 3, a game activation signal is transmitted to the CPU 10 via the interface unit 13 and the bus 12. The game control unit 10e of the CPU 10 reads the game program 15b and related data 15a, performs image processing in the image processing unit 11, and displays a game start screen on the display 1. At the same time, a background sound or the like is output from the speaker 17 via the sound circuit 16.

The CPU 10 has functions of a color customization processing unit 10a, a color / density input monitoring unit 10b, a calculation unit 10c, and a drawing unit 10d in addition to the game control unit 10e that controls the entire game.
The color customization processing unit 10a displays a screen for designating the color and shade density, and when the color and shade density are input, rewrites the input color data and the shade density parameters.
The color / density input monitoring unit 10b monitors whether or not the player has specified a color (inputs RGB values) by operating the cursor and whether or not a shadow density has been input.
The calculation unit 10c calculates color data (RGB) whose density has been adjusted by performing the calculation of equation (1) based on the data of color and shade density.

C = (1-k) · C _B + k · C _B · I (1)
Where k: shade density (value in the range of 0.0 to 1.0 is input)
C _B : Basic color I: Luminance value obtained by light source calculation (any value in the range of 0.0 to 1.0 is determined)
For luminance I, as shown in FIG. 5, [N] is formed by a surface normal vector, [L] is a light source direction vector, and φ is formed by a surface normal vector [N] and a light source direction vector [L]. Is defined as
When COSφ ≧ 0, the luminance is I = COSφ = ([L] · [N]) / (| [L] | · | [N] |)
When COSφ <0 I = 0
It is represented by
Based on the above equation (1), RGB is R = (1−k) · R _B + k · R _B · I
G = (1−k) · G _B + k · G _B · I
B = (1-k) · B _B + k · B _B · I
Is calculated by

A description will be given with specific numerical examples.
C _B = (0.8, 0.5, 0.2) (RGB value)
k = 0.6
Is entered,
The normal vector of the surface and the light source direction vector [N] = (1,2,1)
[L] = (2,1,1)
Is defined as
I = (2 · 1 + 1 · 2 + 1 · 1) / {(1 ² +2 ² + 1 ² ) ^1/2 · (2 ² + 1 ² + 1 ² ) ^1/2 }
= 0.8333333
C = (1 -0.6) · C _B +0.6 · C _B · 0.8333333 = (0.72, 0.45, 0.18)
It is represented by
The drawing unit 10d performs a drawing process on the selected part based on the result of calculation so that the content of customization of the color and shade density of the selected part is reflected. That is, a density curve is drawn as a trigonometric function curve according to the value of the negative density input with respect to the luminance by the normal vector of the defined surface and the light source direction vector, and R, according to the trigonometric function curve. B and G values are calculated and drawn.

FIG. 6 is a diagram for explaining an example of the shade density displayed on the model when the value of shade density k is changed.
(A) is a case where k = 0, and no shade is displayed. (B) is a case where k = 0.5, and shading starts from the center toward the periphery, and the surrounding density is 0.5. The density of the shadow toward the periphery varies with the sin curve, and the periphery has a maximum value of sin of 0.5. (C) is a case where k = 1.0, and shading starts from the center toward the periphery, and the surrounding density is 1.0. The density of the shadow toward the periphery changes with a sin curve, and the periphery has a maximum value of sin of 1.0.
(D) is an example of the shape of the part to be selected, and the shade density is given so that the central part 18a of the part has the highest luminance and the surrounding 18b is shaded.

FIG. 3 is a flowchart for explaining the color customization operation of the game apparatus according to the present invention.
When the button 5 on the operation pad 3 is pressed at the start of the game or during the game to display the menu, and the character color customization is selected from the menu items, the color customization processing unit 10a displays a list of characters. When a character to be color-customized is selected, a customization area 7 is opened as shown in the screen 6 of the display 1 in FIG. 1, and the selected character is displayed.
When the player selects a part (step (hereinafter referred to as “S”) 001), the color customization processing unit 10a displays a screen for designating the color / shadow density. FIG. 4 shows an example of a screen for inputting color designation and shade density.

In FIG. 4, a triangle color model 21 having R, G, and B as vertices is displayed on the right side of the screen. Can be specified.
A shadow density meter 22 is displayed in the lower right part of the screen, and the shade density including element parts (not shown) such as lightness and brightness can be selected by the up and down buttons of the cross button 4. ing. After the shade density is selected, the shade density can be selected by operating the left and right buttons of the cross button 4. The density in the example of FIG. 4 is about 1/3 of the memory 22a.
A sphere model 23 is displayed on the left side of the screen. When a color is designated and a shade density is designated, the effect is previewed each time. Accordingly, the player can repeatedly input and confirm the desired color and shade density as many times as desired.

After opening a screen for inputting color and shade density, the color customization processing unit 10a passes control to the color / density input monitoring unit 10b. The color / density input monitoring unit 10b monitors whether or not the player designates a color (inputs RGB values) by operating the cursor (S002). If the operation is not performed, the shadow density is set next. The process proceeds to monitoring whether or not an input has been made (S004). On the other hand, when the player operates the cursor and designates a color, the parameters of the input color data are rewritten, and the process proceeds to S004.
The color / density input monitoring unit 10b monitors whether or not the player has adjusted the shadow density by operating the up / down buttons. If the operation has not been performed, the color / density input monitoring unit 10b passes control to the calculation unit 10c. The calculation unit 10c performs calculation based on the current color data and the shade density data, and the drawing unit 10d performs a rendering process on the result, and reflects the customization contents of the color and shade density in the sphere model 23 (S006). On the other hand, when the player operates the up / down buttons to adjust the shade density, the input shade density data parameter is rewritten. In step S006, the calculation unit 10c performs calculation using the rewritten shadow density data parameter and color data, and the drawing unit 10d performs drawing processing to reflect the customization contents of the color and shadow density in the sphere model 23. (S006).

Thereafter, the color customization processing unit 10a monitors whether or not the player has pressed a button for ending customization of the color and shade density (S007).
If the end button is not pressed, the process returns to S002 to monitor whether or not a color is designated, and S003 to S006 are repeated. Thus, the player can repeatedly input the desired color and shade density. .
On the other hand, if the button for ending customization is pressed, the screen for inputting the color and shade is closed, and the selection of the selected part is canceled (S008).
Other parts can be selected and the color and shade density can be similarly customized.
To end the color customization, the user can return to the original game screen by pressing the end button on the screen displaying the customization area.

  In the above embodiment, the model is displayed on the screen for color customization and the example of previewing the effect of the color designation and the shade density on the model is explained. May be displayed and the effect previewed.

  The game device uses a display such as a television screen, and is a game device that allows a player to customize a three-dimensional shape to a favorite color or the like by handling or making the three-dimensional shape appear.

It is the schematic which shows the structure of the game device to which the shade concentration method at the time of the three-dimensional model coloring by this invention is applied. It is a block diagram which shows embodiment of the circuit of the game device in this invention. It is a flowchart for demonstrating the operation | movement of customization of the color of the game device in this invention. It is a figure which shows the example of a screen which designates the designation | designated of a color and the shade density. It is a figure for demonstrating the relationship between a light source module and the brightness | luminance of an object. It is a figure for demonstrating the specific example which designates the darkness of a shade.

Explanation of symbols

1 Display
2 Game console
3 Operation pad 4 Cross button
5 button
6 Display screen 7 Customized area 8 3D character 9a, 9b Analog stick 10 CPU
11 Image processing unit 12 Bus 13 Interface unit 15 ROM
16 Sound circuit
17 Speaker

Claims (3)

In a game device having a function capable of coloring a three-dimensional shape object,
A selection means for displaying a three-dimensional shape and selecting a portion to be colored;
Color input means for designating the color of the selected part;
A concentration input means for inputting the shade density of the selected portion;
A computing means for computing the color of the surface of the part selected from the specified color and shade density data and light source data using the equation (1);
Drawing means for drawing a selected part based on the data obtained by the calculation means,
A shade concentration method for coloring a three-dimensional model, characterized in that the shade density can be adjusted along with the coloring of a selected part.
C = (1-k) · C _B + k · C _B · I (1)
Where k: shade density
C _B : Basic color (R, G, B)
I: Luminance value obtained by light source calculation The density of the shade is 0.0, the density at which no shade is generated is 0.0, the largest density is 1.0, and the range of 0.0 to 1.0 is input by the density input means,
The angle between the normal vector and the light source direction vector of the surface if the normal vector and the light source direction vector of the surface of the site with respect to the light source is matched with the 0 degree, the light source direction vector with respect to the normal vector 90 The brightness of the surface is defined so as to change with a trigonometric function curve until it reaches the degree, and the angle between the light source direction vector and the normal vector can be set to a predetermined value. Shade concentration method when coloring a 3D model.   The model is displayed on the color designation and shade density input screen, and when the color is designated on the input screen and the shade density is inputted, the model color and the shade density are changed to correspond to the input values, respectively. The shade concentration method for coloring a three-dimensional model according to claim 1 or 2.

Images