void BKE_ocean_eval_xz_catrom(struct Ocean *oc, struct OceanResult *ocr, float x, float z)
{
BKE_ocean_eval_uv_catrom(oc, ocr, x / oc->_Lx, z / oc->_Lz);
}
/* ***** actual texture sampling ***** */
int ocean_texture(Tex *tex, const float texvec[2], TexResult *texres)
{
OceanTex *ot = tex->ot;
ModifierData *md;
OceanModifierData *omd;
texres->tin = 0.0f;
if ( !(ot) ||
!(ot->object) ||
!(md = (ModifierData *)modifiers_findByType(ot->object, eModifierType_Ocean)) ||
!(omd = (OceanModifierData *)md)->ocean)
{
return 0;
}
else {
const int do_normals = (omd->flag & MOD_OCEAN_GENERATE_NORMALS);
int cfra = R.r.cfra;
int retval = TEX_INT;
OceanResult ocr;
const float u = 0.5f + 0.5f * texvec[0];
const float v = 0.5f + 0.5f * texvec[1];
if (omd->oceancache && omd->cached == true) {
CLAMP(cfra, omd->bakestart, omd->bakeend);
cfra -= omd->bakestart; /* shift to 0 based */
BKE_ocean_cache_eval_uv(omd->oceancache, &ocr, cfra, u, v);
}
else { /* non-cached */
if (G.is_rendering)
BKE_ocean_eval_uv_catrom(omd->ocean, &ocr, u, v);
else
BKE_ocean_eval_uv(omd->ocean, &ocr, u, v);
ocr.foam = BKE_ocean_jminus_to_foam(ocr.Jminus, omd->foam_coverage);
}
switch (ot->output) {
case TEX_OCN_DISPLACEMENT:
/* XYZ displacement */
texres->tr = 0.5f + 0.5f * ocr.disp[0];
texres->tg = 0.5f + 0.5f * ocr.disp[2];
texres->tb = 0.5f + 0.5f * ocr.disp[1];
texres->tr = MAX2(0.0f, texres->tr);
texres->tg = MAX2(0.0f, texres->tg);
texres->tb = MAX2(0.0f, texres->tb);
BRICONTRGB;
retval = TEX_RGB;
break;
case TEX_OCN_EMINUS:
/* -ve eigenvectors ? */
texres->tr = ocr.Eminus[0];
texres->tg = ocr.Eminus[2];
texres->tb = ocr.Eminus[1];
retval = TEX_RGB;
break;
case TEX_OCN_EPLUS:
/* -ve eigenvectors ? */
texres->tr = ocr.Eplus[0];
texres->tg = ocr.Eplus[2];
texres->tb = ocr.Eplus[1];
retval = TEX_RGB;
break;
case TEX_OCN_JPLUS:
texres->tin = ocr.Jplus;
retval = TEX_INT;
break;
case TEX_OCN_FOAM:
texres->tin = ocr.foam;
BRICONT;
retval = TEX_INT;
break;
}
/* if normals needed */
if (texres->nor && do_normals) {
normalize_v3_v3(texres->nor, ocr.normal);
retval |= TEX_NOR;
}
texres->ta = 1.0f;
return retval;
}
}