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Only create aoMetRoughTex when metalnesss or roughness texture provided

This commit is contained in:
Michael Tostenson 2019-03-26 17:28:10 -07:00
parent 678a9bf844
commit 9c114ffa49
1 changed files with 25 additions and 20 deletions
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45
src/gltf/Raw2Gltf.cpp
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@ -261,26 +261,31 @@ ModelData* Raw2Gltf(
* Other values translate directly.
*/
RawMetRoughMatProps* props = (RawMetRoughMatProps*)material.info.get();
// merge metallic into the blue channel and roughness into the green, of a new combinatory
// texture
aoMetRoughTex = textureBuilder.combine(
{
material.textures[RAW_TEXTURE_USAGE_OCCLUSION],
material.textures[RAW_TEXTURE_USAGE_METALLIC],
material.textures[RAW_TEXTURE_USAGE_ROUGHNESS],
},
"ao_met_rough",
[&](const std::vector<const TextureBuilder::pixel*> pixels) -> TextureBuilder::pixel {
const float occlusion = (*pixels[0])[0];
const float metallic = (*pixels[1])[0];
const float roughness = (*pixels[2])[0];
return {{occlusion,
props->invertRoughnessMap ? 1.0f - roughness : roughness,
metallic,
1}};
},
false);
// If either a metallic or roughness map has been provided, generate the aoMetRoughTex.
bool hasMetallicMap = material.textures[RAW_TEXTURE_USAGE_METALLIC] >= 0;
bool hasRoughnessMap = material.textures[RAW_TEXTURE_USAGE_ROUGHNESS] >= 0;
if (hasMetallicMap || hasRoughnessMap) {
// merge metallic into the blue channel and roughness into the green, of a new combinatory
// texture
aoMetRoughTex = textureBuilder.combine(
{
material.textures[RAW_TEXTURE_USAGE_OCCLUSION],
material.textures[RAW_TEXTURE_USAGE_METALLIC],
material.textures[RAW_TEXTURE_USAGE_ROUGHNESS],
},
"ao_met_rough",
[&](const std::vector<const TextureBuilder::pixel*> pixels) -> TextureBuilder::pixel {
const float occlusion = (*pixels[0])[0];
const float metallic = (*pixels[1])[0] * (hasMetallicMap ? 1 : props->metallic);
const float roughness = (*pixels[2])[0] * (hasRoughnessMap ? 1 : props->roughness);
return {{occlusion,
props->invertRoughnessMap ? 1.0f - roughness : roughness,
metallic,
1}};
},
false);
}
baseColorTex = simpleTex(RAW_TEXTURE_USAGE_ALBEDO);
diffuseFactor = props->diffuseFactor;
metallic = props->metallic;