int plugin_tex_doit(int stype, Cast *cast, float *texvec, float *dxt, float *dyt, float *result)
{
float xwave, ywave;
if(stype==1) {
texvec[0]+= hnoise(cast->noise, texvec[0], texvec[1], texvec[2]);
texvec[1]+= hnoise(cast->noise, texvec[1], texvec[2], texvec[0]);
}
if(dxt && dyt) {
xwave= sample_wave(cast->size, texvec[0], fabs(dxt[0]) + fabs(dyt[0]) );
ywave= sample_wave(cast->size, texvec[1], fabs(dxt[1]) + fabs(dyt[1]) );
if(xwave > ywave) result[0]= xwave-ywave;
else result[0]= ywave-xwave;
}
else {
xwave= sample_wave(cast->size, texvec[0], 0.0 );
ywave= sample_wave(cast->size, texvec[1], 0.0 );
if(xwave > ywave) result[0]= xwave-ywave;
else result[0]= ywave-xwave;
}
return TEX_INT;
}
int plugin_tex_doit(int stype, Cast *cast, float *texvec, float *dxt, float *dyt, float *result)
{
float val = 0.0;
float a = 1.0;
float p[3];
float tv[3];
int i;
int res = TEX_INT;
tv[0]=(texvec[0]+1.0)/2.0;
tv[1]=(texvec[1]+1.0)/2.0;
tv[2]=(texvec[2]+1.0)/2.0;
p[0] = cast->txtscale * tv[0];
p[1] = cast->txtscale * tv[1];
p[2] = cast->txtscale * tv[2];
for (i=0; i<cast->depth; i++) {
val += a * hnoise(1.0, p[0], p[1], p[2]);
p[0] *= 2.0;
p[1] *= 2.0;
p[2] *= 2.0;
a *= 0.5;
}
/* always return this value */
result[0] = CLAMP (val+cast->offset, 0.0, 1.0) * pow (fabs(sqrt(tv[0]*tv[0]+tv[1]*tv[1]+tv[2]*tv[2])), cast->falloff);
if(stype==1) {
/*
* this is r, g, b, a:
*/
result[1]= 0.5*result[0];
result[2]= 1.0-val;
result[3]= fsqrt(fabs(result[0]));
result[4]= 1.0;
res |= TEX_RGB;
}
if(stype==2) {
/*
* This value is the displacement of the actual normal in
* the Material calculation.
*/
result[5]+= val;
result[6]+= 1.0-val;
result[7]= 0.0;
res |= TEX_NOR;
}
return res;
}
