void RB_CalcStretchTexMatrix( const waveForm_t *wf, float *matrix )
{
float p;
texModInfo_t tmi;
p = 1.0f / EvalWaveForm( wf );
tmi.matrix[0][0] = p;
tmi.matrix[1][0] = 0;
tmi.translate[0] = 0.5f - 0.5f * p;
tmi.matrix[0][1] = 0;
tmi.matrix[1][1] = p;
tmi.translate[1] = 0.5f - 0.5f * p;
RB_CalcTransformTexMatrix( &tmi, matrix );
}
static void ComputeTexMatrix( shaderStage_t *pStage, int bundleNum, float *outmatrix)
{
int tm;
float matrix[16], currentmatrix[16];
textureBundle_t *bundle = &pStage->bundle[bundleNum];
Matrix16Identity(outmatrix);
Matrix16Identity(currentmatrix);
for ( tm = 0; tm < bundle->numTexMods ; tm++ ) {
switch ( bundle->texMods[tm].type )
{
case TMOD_NONE:
tm = TR_MAX_TEXMODS; // break out of for loop
break;
case TMOD_TURBULENT:
RB_CalcTurbulentTexMatrix( &bundle->texMods[tm].wave,
matrix );
outmatrix[12] = matrix[12];
outmatrix[13] = matrix[13];
Matrix16Copy(outmatrix, currentmatrix);
break;
case TMOD_ENTITY_TRANSLATE:
RB_CalcScrollTexMatrix( backEnd.currentEntity->e.shaderTexCoord,
matrix );
Matrix16Multiply(matrix, currentmatrix, outmatrix);
Matrix16Copy(outmatrix, currentmatrix);
break;
case TMOD_SCROLL:
RB_CalcScrollTexMatrix( bundle->texMods[tm].scroll,
matrix );
Matrix16Multiply(matrix, currentmatrix, outmatrix);
Matrix16Copy(outmatrix, currentmatrix);
break;
case TMOD_SCALE:
RB_CalcScaleTexMatrix( bundle->texMods[tm].scale,
matrix );
Matrix16Multiply(matrix, currentmatrix, outmatrix);
Matrix16Copy(outmatrix, currentmatrix);
break;
case TMOD_STRETCH:
RB_CalcStretchTexMatrix( &bundle->texMods[tm].wave,
matrix );
Matrix16Multiply(matrix, currentmatrix, outmatrix);
Matrix16Copy(outmatrix, currentmatrix);
break;
case TMOD_TRANSFORM:
RB_CalcTransformTexMatrix( &bundle->texMods[tm],
matrix );
Matrix16Multiply(matrix, currentmatrix, outmatrix);
Matrix16Copy(outmatrix, currentmatrix);
break;
case TMOD_ROTATE:
RB_CalcRotateTexMatrix( bundle->texMods[tm].rotateSpeed,
matrix );
Matrix16Multiply(matrix, currentmatrix, outmatrix);
Matrix16Copy(outmatrix, currentmatrix);
break;
default:
ri.Error( ERR_DROP, "ERROR: unknown texmod '%d' in shader '%s'", bundle->texMods[tm].type, tess.shader->name );
break;
}
}
}
static void ComputeTexMods( shaderStage_t *pStage, int bundleNum, float *outMatrix, float *outOffTurb)
{
int tm;
float matrix[6], currentmatrix[6];
textureBundle_t *bundle = &pStage->bundle[bundleNum];
matrix[0] = 1.0f; matrix[2] = 0.0f; matrix[4] = 0.0f;
matrix[1] = 0.0f; matrix[3] = 1.0f; matrix[5] = 0.0f;
currentmatrix[0] = 1.0f; currentmatrix[2] = 0.0f; currentmatrix[4] = 0.0f;
currentmatrix[1] = 0.0f; currentmatrix[3] = 1.0f; currentmatrix[5] = 0.0f;
outMatrix[0] = 1.0f; outMatrix[2] = 0.0f;
outMatrix[1] = 0.0f; outMatrix[3] = 1.0f;
outOffTurb[0] = 0.0f; outOffTurb[1] = 0.0f; outOffTurb[2] = 0.0f; outOffTurb[3] = 0.0f;
for ( tm = 0; tm < bundle->numTexMods ; tm++ ) {
switch ( bundle->texMods[tm].type )
{
case TMOD_NONE:
tm = TR_MAX_TEXMODS; // break out of for loop
break;
case TMOD_TURBULENT:
RB_CalcTurbulentFactors(&bundle->texMods[tm].wave, &outOffTurb[2], &outOffTurb[3]);
break;
case TMOD_ENTITY_TRANSLATE:
RB_CalcScrollTexMatrix( backEnd.currentEntity->e.shaderTexCoord, matrix );
break;
case TMOD_SCROLL:
RB_CalcScrollTexMatrix( bundle->texMods[tm].scroll,
matrix );
break;
case TMOD_SCALE:
RB_CalcScaleTexMatrix( bundle->texMods[tm].scale,
matrix );
break;
case TMOD_STRETCH:
RB_CalcStretchTexMatrix( &bundle->texMods[tm].wave,
matrix );
break;
case TMOD_TRANSFORM:
RB_CalcTransformTexMatrix( &bundle->texMods[tm],
matrix );
break;
case TMOD_ROTATE:
RB_CalcRotateTexMatrix( bundle->texMods[tm].rotateSpeed,
matrix );
break;
default:
ri.Error( ERR_DROP, "ERROR: unknown texmod '%d' in shader '%s'", bundle->texMods[tm].type, tess.shader->name );
break;
}
switch ( bundle->texMods[tm].type )
{
case TMOD_NONE:
case TMOD_TURBULENT:
default:
break;
case TMOD_ENTITY_TRANSLATE:
case TMOD_SCROLL:
case TMOD_SCALE:
case TMOD_STRETCH:
case TMOD_TRANSFORM:
case TMOD_ROTATE:
outMatrix[0] = matrix[0] * currentmatrix[0] + matrix[2] * currentmatrix[1];
outMatrix[1] = matrix[1] * currentmatrix[0] + matrix[3] * currentmatrix[1];
outMatrix[2] = matrix[0] * currentmatrix[2] + matrix[2] * currentmatrix[3];
outMatrix[3] = matrix[1] * currentmatrix[2] + matrix[3] * currentmatrix[3];
outOffTurb[0] = matrix[0] * currentmatrix[4] + matrix[2] * currentmatrix[5] + matrix[4];
outOffTurb[1] = matrix[1] * currentmatrix[4] + matrix[3] * currentmatrix[5] + matrix[5];
currentmatrix[0] = outMatrix[0];
currentmatrix[1] = outMatrix[1];
currentmatrix[2] = outMatrix[2];
currentmatrix[3] = outMatrix[3];
currentmatrix[4] = outOffTurb[0];
currentmatrix[5] = outOffTurb[1];
break;
}
}
}