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glTF2: Improved support for AI_MATKEY_OPACITY 

- Exporter: Writing opacity to pbrMetallicRoughness.baseColorFactor[3] even when alphaMode is set
- Importer: Setting AI_MATKEY_OPACITY from pbrMetallicRoughness.baseColorFactor[3]
pull/3967/head
Jerome St-Louis 2021-06-24 13:25:44 -04:00
parent bd9b28bc45
commit 0e41efb050
2 changed files with 8 additions and 9 deletions
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16
code/AssetLib/glTF2/glTF2Exporter.cpp
View File

@ -778,19 +778,17 @@ void glTF2Exporter::ExportMaterials()
mat.Get(AI_MATKEY_TWOSIDED, m->doubleSided);
mat.Get(AI_MATKEY_GLTF_ALPHACUTOFF, m->alphaCutoff);
float opacity;
aiString alphaMode;
if (mat.Get(AI_MATKEY_OPACITY, opacity) == AI_SUCCESS) {
if (opacity < 1) {
m->alphaMode = "BLEND";
m->pbrMetallicRoughness.baseColorFactor[3] *= opacity;
}
}
if (mat.Get(AI_MATKEY_GLTF_ALPHAMODE, alphaMode) == AI_SUCCESS) {
m->alphaMode = alphaMode.C_Str();
} else {
float opacity;
if (mat.Get(AI_MATKEY_OPACITY, opacity) == AI_SUCCESS) {
if (opacity < 1) {
m->alphaMode = "BLEND";
m->pbrMetallicRoughness.baseColorFactor[3] *= opacity;
}
}
}
{

1
code/AssetLib/glTF2/glTF2Importer.cpp
View File

@ -267,6 +267,7 @@ static aiMaterial *ImportMaterial(std::vector<int> &embeddedTexIdxs, Asset &r, M
SetMaterialColorProperty(r, mat.emissiveFactor, aimat, AI_MATKEY_COLOR_EMISSIVE);
aimat->AddProperty(&mat.doubleSided, 1, AI_MATKEY_TWOSIDED);
aimat->AddProperty(&mat.pbrMetallicRoughness.baseColorFactor[3], 1, AI_MATKEY_OPACITY);
aiString alphaMode(mat.alphaMode);
aimat->AddProperty(&alphaMode, AI_MATKEY_GLTF_ALPHAMODE);