#4080 Rigged mesh support #3

akleshchev · akleshchev · commit d342aa79c24f · 2025-05-26T17:43:12.000+03:00
diff --git a/indra/newview/gltf/llgltfloader.cpp b/indra/newview/gltf/llgltfloader.cpp
@@ -690,6 +690,13 @@ bool LLGLTFLoader::populateModelFromMesh(LLModel* pModel, const LL::GLTF::Mesh&
                 LL_INFOS("GLTF_DEBUG") << "mAlternateBindMatrix name: " << legal_name << " val: " << original_joint_transform << LL_ENDL;
                 skin_info.mAlternateBindMatrix.push_back(LLMatrix4a(original_joint_transform));
             }
+            else
+            {
+                // For gltf mInverseBindMatrices are optional, but not for viewer
+                // todo: get a model that triggers this
+                skin_info.mInvBindMatrix.push_back(LLMatrix4a(mJointList[legal_name])); // might need to be an 'identity'
+                skin_info.mAlternateBindMatrix.push_back(LLMatrix4a(mJointList[legal_name]));
+            }
         }
 
         // "Bind Shape Matrix" is supposed to transform the geometry of the skinned mesh

Original file line number	Diff line number	Diff line change
`@@ -690,6 +690,13 @@ bool LLGLTFLoader::populateModelFromMesh(LLModel* pModel, const LL::GLTF::Mesh&`
`690`	`690`	`LL_INFOS("GLTF_DEBUG") << "mAlternateBindMatrix name: " << legal_name << " val: " << original_joint_transform << LL_ENDL;`
`691`	`691`	`skin_info.mAlternateBindMatrix.push_back(LLMatrix4a(original_joint_transform));`
`692`	`692`	`}`
	`693`	`+ else`
	`694`	`+ {`
	`695`	`+ // For gltf mInverseBindMatrices are optional, but not for viewer`
	`696`	`+ // todo: get a model that triggers this`
	`697`	`+ skin_info.mInvBindMatrix.push_back(LLMatrix4a(mJointList[legal_name])); // might need to be an 'identity'`
	`698`	`+ skin_info.mAlternateBindMatrix.push_back(LLMatrix4a(mJointList[legal_name]));`
	`699`	`+ }`
`693`	`700`	`}`
`694`	`701`
`695`	`702`	`// "Bind Shape Matrix" is supposed to transform the geometry of the skinned mesh`