storing blendshape names as extras in primitives

src/Fbx2Raw.cpp

@@ -787,6 +787,7 @@ static void ReadMesh(RawModel &raw, FbxScene *pScene, FbxNode *pNode, const std:
                 static_cast<float>(blendShapes.GetBlendChannel(channelIx).deformPercent),
                 shape.normals.LayerPresent(),
                 shape.tangents.LayerPresent(),
+                shape.shape->GetName()
             });
         }
     }

src/Raw2Gltf.cpp

@@ -940,7 +940,7 @@ ModelData *Raw2Gltf(
                             GLT_VEC4F, tangents);
                     }
 
-                    primitive->AddTarget(pAcc.get(), nAcc.get(), tAcc.get());
+                    primitive->AddTarget(pAcc.get(), nAcc.get(), tAcc.get(), channel.name);
                 }
             }
             if (options.useDraco) {

src/RawModel.h

@@ -320,6 +320,7 @@ struct RawBlendChannel
     float defaultDeform;
     bool hasNormals;
     bool hasTangents;
+    std::string name;
 };
 
 struct RawSurface

src/glTF/PrimitiveData.cpp

@@ -39,13 +39,16 @@ void PrimitiveData::NoteDracoBuffer(const BufferViewData &data)
     dracoBufferView = data.ix;
 }
 
-void PrimitiveData::AddTarget(const AccessorData *positions, const AccessorData *normals, const AccessorData *tangents)
+void PrimitiveData::AddTarget(const AccessorData *positions, const AccessorData *normals, const AccessorData *tangents,
+                              const std::string &shape_name)
 {
     targetAccessors.push_back(std::make_tuple(
         positions->ix,
         normals ? normals->ix : -1,
         tangents ? tangents ->ix : -1
     ));
+
+    targetNames.push_back(shape_name);
 }
 
 void to_json(json &j, const PrimitiveData &d) {
@@ -70,6 +73,15 @@ void to_json(json &j, const PrimitiveData &d) {
         }
         j["targets"] = targets;
     }
+    if (!d.targetNames.empty()) {
+        json extras {};
+        json names {};
+        for (const auto &name : d.targetNames) {
+            names.push_back(name);
+        }
+        extras["target_names"] = names;
+        j["extras"] = extras;
+    }
     if (!d.dracoAttributes.empty()) {
         j["extensions"] = {
             { KHR_DRACO_MESH_COMPRESSION, {

src/glTF/PrimitiveData.h

@@ -31,7 +31,8 @@ struct PrimitiveData
 
     void AddAttrib(std::string name, const AccessorData &accessor);
 
-    void AddTarget(const AccessorData *positions, const AccessorData *normals, const AccessorData *tangents);
+    void AddTarget(const AccessorData *positions, const AccessorData *normals, const AccessorData *tangents,
+                   const std::string &name);
 
     template<class T>
     void AddDracoAttrib(const AttributeDefinition<T> attribute, const std::vector<T> &attribArr)
@@ -62,6 +63,7 @@ struct PrimitiveData
     const MeshMode     mode;
 
     std::vector<std::tuple<int, int, int>> targetAccessors {};
+    std::vector<std::string> targetNames {};
 
     std::map<std::string, int> attributes;
     std::map<std::string, int> dracoAttributes;