setMorphAt method
Implementation
void setMorphAt(int index, Object3D object ) {
final objectInfluences = object.morphTargetInfluences;
final len = objectInfluences.length + 1; // morphBaseInfluence + all influences
morphTexture ??= DataTexture( Float32Array(len * count!), len, count, RedFormat, FloatType );
final Float32Array array = morphTexture!.source.data.data;
double morphInfluencesSum = 0;
for (int i = 0; i < objectInfluences.length; i ++ ) {
morphInfluencesSum += objectInfluences[ i ];
}
final morphBaseInfluence = geometry!.morphTargetsRelative ? 1.0 : 1 - morphInfluencesSum;
final dataIndex = len * index;
array[dataIndex] = morphBaseInfluence;
array.set(objectInfluences, dataIndex + 1);
}