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发表于 2005-8-5 12:21:00
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Re:怎样加强光照
D3DCOLORVALUE Structure
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Describes color values.
Syntax
typedef struct _D3DCOLORVALUE {
float r;
float g;
float b;
float a;
} D3DCOLORVALUE;
Members
r
Floating-point value specifying the red component of a color. This value generally is in the range from 0.0 through 1.0, with 0.0 being black.
g
Floating-point value specifying the green component of a color. This value generally is in the range from 0.0 through 1.0, with 0.0 being black.
b
Floating-point value specifying the blue component of a color. This value generally is in the range from 0.0 through 1.0, with 0.0 being black.
a
Floating-point value specifying the alpha component of a color. This value generally is in the range from 0.0 through 1.0, with 0.0 being black.
Remarks
You can set the members of this structure to values outside the range of 0 through 1 to implement some unusual effects. Values greater than 1 produce strong lights that tend to wash out a scene. Negative values produce dark lights that actually remove light from a scene.
dx的帮助里说是可以超过1的 |
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