TQAVTexture Struct Reference

#include <RAVE.h>

Data Fields
float	x
float	y
float	z
float	invW
float	r
float	g
float	b
float	a
float	uOverW
float	vOverW
float	kd_r
float	kd_g
float	kd_b
float	ks_r
float	ks_g
float	ks_b

Detailed Description

TQAVTexture is used for texture mapping. The texture mapping operation is controlled by the kQATag_TextureOp variable, which is a mask of kQATextureOp_None/Modulate/Highlight/Decal. Below is pseudo-code for the texture shading operation:

 texPix = TextureLookup (uq/q, vq/q);
 if (kQATextureOp_Decal)
 {
     texPix.r = texPix.a * texPix.r + (1 - texPix.a) * r;
     texPix.g = texPix.a * texPix.g + (1 - texPix.a) * g;
     texPix.b = texPix.a * texPix.b + (1 - texPix.a) * b;
     texPix.a = a;
 }
 else
 {
     texPix.a = texPix.a * a;
 }
 if (kQATextureOp_Modulate)
 {
     texPix.r *= kd_r;       // Clamped to prevent overflow
     texPix.g *= kd_g;       // Clamped to prevent overflow
     texPix.b *= kd_b;       // Clamped to prevent overflow
 }
 if (kQATextureOp_Highlight)
 {
     texPix.r += ks_r;       // Clamped to prevent overflow
     texPix.g += ks_g;       // Clamped to prevent overflow
     texPix.b += ks_b;       // Clamped to prevent overflow
 }

After computation of texPix, transparency blending (as shown above for TQAVGouraud) is performed.

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The documentation for this struct was generated from the following file:

• RAVE.h