示例#1
0
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);
}
示例#2
0
/* ***** 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;
	}
}