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FBX2glTF
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Generally repair old broken logic around aoMetRough texture.

This commit is contained in:
Par Winzell 2019-03-29 09:59:57 -07:00
parent ca78a31b22
commit d2f7d0e270
1 changed files with 20 additions and 15 deletions
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35
src/gltf/Raw2Gltf.cpp
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@ -261,13 +261,19 @@ ModelData* Raw2Gltf(
* Other values translate directly.
*/
RawMetRoughMatProps* props = (RawMetRoughMatProps*)material.info.get();
// If either a metallic or roughness map has been provided, generate the aoMetRoughTex.
// determine if we need to generate a combined map
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
bool hasOcclusionMap = material.textures[RAW_TEXTURE_USAGE_OCCLUSION] >= 0;
aoMetRoughTex = hasMetallicMap
? simpleTex(RAW_TEXTURE_USAGE_METALLIC)
: (hasRoughnessMap
? simpleTex(RAW_TEXTURE_USAGE_ROUGHNESS)
: (hasOcclusionMap ? simpleTex(RAW_TEXTURE_USAGE_OCCLUSION) : nullptr));
if (aoMetRoughTex == nullptr) {
// merge occlusion into the red channel, metallic into blue channel, and
// roughness into the green, of a new combinatory texture
aoMetRoughTex = textureBuilder.combine(
{
material.textures[RAW_TEXTURE_USAGE_OCCLUSION],
@ -275,14 +281,16 @@ ModelData* Raw2Gltf(
material.textures[RAW_TEXTURE_USAGE_ROUGHNESS],
},
"ao_met_rough",
[&](const std::vector<const TextureBuilder::pixel*> pixels) -> TextureBuilder::pixel {
[&](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);
const float roughness =
(*pixels[2])[0] * (hasRoughnessMap ? 1 : props->roughness);
return {{occlusion,
props->invertRoughnessMap ? 1.0f - roughness : roughness,
metallic,
1}};
props->invertRoughnessMap ? 1.0f - roughness : roughness,
metallic,
1}};
},
false);
}
@ -292,11 +300,8 @@ ModelData* Raw2Gltf(
roughness = props->roughness;
emissiveFactor = props->emissiveFactor;
emissiveIntensity = props->emissiveIntensity;
// add the occlusion texture only if actual occlusion pixels exist in the aoNetRough
// texture.
if (material.textures[RAW_TEXTURE_USAGE_OCCLUSION] >= 0) {
occlusionTexture = aoMetRoughTex.get();
}
// this will set occlusionTexture to null, if no actual occlusion map exists
occlusionTexture = aoMetRoughTex.get();
} else {
/**
* Traditional FBX Material -> PBR Met/Rough glTF.