Merge pull request #187 from akulagrawal/master

Normalize bone weights #185
KhronosGroup · May 23, 2018 · aaf3971 · aaf3971
2 parents 1ed629e + c596b76
commit aaf3971
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/src/COLLADA2GLTFWriter.cpp b/src/COLLADA2GLTFWriter.cpp
@@ -1620,6 +1620,19 @@ bool COLLADA2GLTF::Writer::writeController(const COLLADAFW::Controller* controll
  std::tie(type, joints, weights) = _skinData[skinControllerDataId];
  int numberOfComponents = GLTF::Accessor::getNumberOfComponents(type);
 
+ for (size_t i = 0; i < weights.size(); i++) {
+ float weightSum = 0;
+ float* weight = weights[i];
+ for (size_t j = 0; j < numberOfComponents; j++) {
+ weightSum = weightSum + std::abs(weight[j]);
+ }
+ if (weightSum > 0) {
+ for (size_t j = 0; j < numberOfComponents; j++) {
+ weight[j] = weight[j] / weightSum;
+ }
+ }
+ }
+
  COLLADAFW::UniqueId meshId = skinController->getSource();
  GLTF::Mesh* mesh = _meshInstances[meshId];