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Eevee: Add precomputed BTDF LUT.

This commit is contained in:
Clément Foucault 2017-08-04 18:30:13 +02:00
parent ba4ffe90cd
commit 4ec58659ad
2 changed files with 11022 additions and 1 deletions
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11011
source/blender/draw/engines/eevee/eevee_lut.h
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12
source/blender/draw/engines/eevee/eevee_materials.c
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@ -358,7 +358,7 @@ void EEVEE_materials_init(EEVEE_StorageList *stl)
MEM_freeN(frag_str);
/* Textures */
const int layers = 3;
const int layers = 3 + 16;
float (*texels)[4] = MEM_mallocN(sizeof(float[4]) * 64 * 64 * layers, "utils texels");
float (*texels_layer)[4] = texels;
@ -382,6 +382,16 @@ void EEVEE_materials_init(EEVEE_StorageList *stl)
texels_layer[i][3] = sinf(blue_noise[i][1] * 2.0 * M_PI);
}
for (int j = 0; j < 16; ++j) {
texels_layer += 64 * 64;
for (int i = 0; i < 64 * 64; i++) {
texels_layer[i][0] = btdf_split_sum_ggx[j*2][i];
texels_layer[i][1] = btdf_split_sum_ggx[j*2][i];
texels_layer[i][2] = btdf_split_sum_ggx[j*2][i];
texels_layer[i][3] = btdf_split_sum_ggx[j*2][i];
}
}
e_data.util_tex = DRW_texture_create_2D_array(64, 64, layers, DRW_TEX_RGBA_16, DRW_TEX_FILTER | DRW_TEX_WRAP, (float *)texels);
MEM_freeN(texels);
}