Individual weights Linearly Normalized

src/COLLADA2GLTFWriter.cpp

@@ -1620,27 +1620,18 @@ bool COLLADA2GLTF::Writer::writeController(const COLLADAFW::Controller* controll
 		std::tie(type, joints, weights) = _skinData[skinControllerDataId];
 		int numberOfComponents = GLTF::Accessor::getNumberOfComponents(type);
 
-		float maxweight = 0.0, minweight = 0.0;
-		if (weights.size() > 0) {
-			maxweight = *weights[0];
-			minweight = *weights[0];
-		}
-		for (size_t i = 1; i < weights.size(); i++) {
-			maxweight = std::max(maxweight, *weights[i]);
-			minweight = std::min(minweight, *weights[i]);
-		}
-		if (maxweight == minweight) {
-			if (maxweight > 0) {
-				for (size_t i = 0; i < weights.size(); i++) {
-					*weights[i] = 1;
-				}
-			}
-		}
-		else {
-			for (size_t i = 0; i < weights.size(); i++) {
-				*weights[i] = (*weights[i] - minweight) / (maxweight - minweight);
-			}
-		}
+		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];