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Append a setting "AI_CONFIG_EXPORT_FBX_TRANSPARENCY_FACTOR_REFER_TO_OPACITY". (#5450) 

Co-authored-by: Kim Kulling <kimkulling@users.noreply.github.com>
pull/5480/head
sSsA01 2024-02-28 04:26:13 +09:00 committed by GitHub
parent 01231d0e60
commit f95050e7aa
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2 changed files with 27 additions and 7 deletions
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24
code/AssetLib/FBX/FBXExporter.cpp
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@ -1089,6 +1089,8 @@ void FBXExporter::WriteObjects ()
bool bJoinIdenticalVertices = mProperties->GetPropertyBool("bJoinIdenticalVertices", true);
std::vector<std::vector<int32_t>> vVertexIndice;//save vertex_indices as it is needed later
const auto bTransparencyFactorReferencedToOpacity = mProperties->GetPropertyBool(AI_CONFIG_EXPORT_FBX_TRANSPARENCY_FACTOR_REFER_TO_OPACITY, false);
// geometry (aiMesh)
mesh_uids.clear();
indent = 1;
@ -1445,13 +1447,21 @@ void FBXExporter::WriteObjects ()
// "TransparentColor" / "TransparencyFactor"...
// thanks FBX, for your insightful interpretation of consistency
p.AddP70colorA("TransparentColor", c.r, c.g, c.b);
// TransparencyFactor defaults to 0.0, so set it to 1.0.
// note: Maya always sets this to 1.0,
// so we can't use it sensibly as "Opacity".
// In stead we rely on the legacy "Opacity" value, below.
// Blender also relies on "Opacity" not "TransparencyFactor",
// probably for a similar reason.
p.AddP70numberA("TransparencyFactor", 1.0);
if (!bTransparencyFactorReferencedToOpacity) {
// TransparencyFactor defaults to 0.0, so set it to 1.0.
// note: Maya always sets this to 1.0,
// so we can't use it sensibly as "Opacity".
// In stead we rely on the legacy "Opacity" value, below.
// Blender also relies on "Opacity" not "TransparencyFactor",
// probably for a similar reason.
p.AddP70numberA("TransparencyFactor", 1.0);
}
}
if (bTransparencyFactorReferencedToOpacity) {
if (m->Get(AI_MATKEY_OPACITY, f) == aiReturn_SUCCESS) {
p.AddP70numberA("TransparencyFactor", 1.0 - f);
}
}
if (m->Get(AI_MATKEY_COLOR_REFLECTIVE, c) == aiReturn_SUCCESS) {
p.AddP70colorA("ReflectionColor", c.r, c.g, c.b);

10
include/assimp/config.h.in
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@ -1113,6 +1113,16 @@ enum aiComponent
#define AI_CONFIG_EXPORT_GLTF_UNLIMITED_SKINNING_BONES_PER_VERTEX \
"USE_UNLIMITED_BONES_PER VERTEX"
/** @brief Specifies whether to write the value referenced to opacity in TransparencyFactor of each material.
*
* When this flag is not defined, the TransparencyFactor value of each meterial is 1.0.
* By enabling this flag, the value is 1.0 - opacity;
* Property type: Bool. Default value: false.
*/
#define AI_CONFIG_EXPORT_FBX_TRANSPARENCY_FACTOR_REFER_TO_OPACITY \
"EXPORT_FBX_TRANSPARENCY_FACTOR_REFER_TO_OPACITY"
/**
* @brief Specifies the blob name, assimp uses for exporting.
*