closes https://github.com/assimp/assimp/issues/2613 : merge glTF2 patch.

code/glTF/glTFAsset.inl

@@ -1180,8 +1180,12 @@ inline void Light::SetDefaults()
     falloffExponent = 0.f;
 }
 
-inline void Node::Read(Value& obj, Asset& r)
-{
+inline 
+void Node::Read(Value& obj, Asset& r) {
+    if (name.empty()) {
+        name = id;
+    }
+
     if (Value* children = FindArray(obj, "children")) {
         this->children.reserve(children->Size());
         for (unsigned int i = 0; i < children->Size(); ++i) {

code/glTF/glTFImporter.cpp

@@ -475,14 +475,17 @@ void glTFImporter::ImportCameras(glTF::Asset& r) {
 
         if (cam.type == Camera::Perspective) {
             aicam->mAspect        = cam.perspective.aspectRatio;
-            aicam->mHorizontalFOV = cam.perspective.yfov * aicam->mAspect;
+            aicam->mHorizontalFOV = cam.cameraProperties.perspective.yfov * ((aicam->mAspect == 0.f) ? 1.f : aicam->mAspect);
             aicam->mClipPlaneFar  = cam.perspective.zfar;
             aicam->mClipPlaneNear = cam.perspective.znear;
         } else {
             aicam->mClipPlaneFar = cam.ortographic.zfar;
             aicam->mClipPlaneNear = cam.ortographic.znear;
             aicam->mHorizontalFOV = 0.0;
-            aicam->mAspect = cam.ortographic.xmag / cam.ortographic.ymag;
+            aicam->mAspect = 1.0f;
+            if (0.f != cam.cameraProperties.ortographic.ymag) {
+                aicam->mAspect = cam.cameraProperties.ortographic.xmag / cam.cameraProperties.ortographic.ymag;
+            }
         }
     }
 }

code/glTF2/glTF2Asset.inl

@@ -1098,8 +1098,11 @@ inline void Light::Read(Value& obj, Asset& /*r*/)
     }
 }
 
-inline void Node::Read(Value& obj, Asset& r)
-{
+inline 
+void Node::Read(Value& obj, Asset& r) {
+    if (name.empty()) {
+        name = id;
+    }
 
     if (Value* children = FindArray(obj, "children")) {
         this->children.reserve(children->Size());

code/glTF2/glTF2Importer.cpp

@@ -702,14 +702,17 @@ void glTF2Importer::ImportCameras(glTF2::Asset& r)
         if (cam.type == Camera::Perspective) {
 
             aicam->mAspect        = cam.cameraProperties.perspective.aspectRatio;
-            aicam->mHorizontalFOV = cam.cameraProperties.perspective.yfov * aicam->mAspect;
+            aicam->mHorizontalFOV = cam.cameraProperties.perspective.yfov * ((aicam->mAspect == 0.f) ? 1.f : aicam->mAspect);
             aicam->mClipPlaneFar  = cam.cameraProperties.perspective.zfar;
             aicam->mClipPlaneNear = cam.cameraProperties.perspective.znear;
         } else {
             aicam->mClipPlaneFar = cam.cameraProperties.ortographic.zfar;
             aicam->mClipPlaneNear = cam.cameraProperties.ortographic.znear;
             aicam->mHorizontalFOV = 0.0;
-            aicam->mAspect = cam.cameraProperties.ortographic.xmag / cam.cameraProperties.ortographic.ymag;
+            aicam->mAspect = 1.0f;
+            if (0.f != cam.cameraProperties.ortographic.ymag ) {
+                aicam->mAspect = cam.cameraProperties.ortographic.xmag / cam.cameraProperties.ortographic.ymag;
+            }
         }
     }
 }
@@ -905,6 +908,9 @@ aiNode* ImportNode(aiScene* pScene, glTF2::Asset& r, std::vector<unsigned int>&
                 std::vector<std::vector<aiVertexWeight>> weighting(mesh->mNumBones);
                 BuildVertexWeightMapping(node.meshes[0]->primitives[primitiveNo], weighting);
 
+                mat4* pbindMatrices = nullptr;
+                node.skin->inverseBindMatrices->ExtractData(pbindMatrices);
+
                 for (uint32_t i = 0; i < mesh->mNumBones; ++i) {
                     aiBone* bone = new aiBone();
 
@@ -920,6 +926,8 @@ aiNode* ImportNode(aiScene* pScene, glTF2::Asset& r, std::vector<unsigned int>&
                     }
                     GetNodeTransform(bone->mOffsetMatrix, *joint);
 
+                    CopyValue(pbindMatrices[i], bone->mOffsetMatrix);
+
                     std::vector<aiVertexWeight>& weights = weighting[i];
 
                     bone->mNumWeights = static_cast<uint32_t>(weights.size());
@@ -935,6 +943,10 @@ aiNode* ImportNode(aiScene* pScene, glTF2::Asset& r, std::vector<unsigned int>&
                     }
                     mesh->mBones[i] = bone;
                 }
+
+                if (pbindMatrices) {
+                    delete[] pbindMatrices;
+                }
             }
         }