genMorphGeometry method

dynamic genMorphGeometry(dynamic parentGeo, dynamic parentGeoNode, dynamic morphGeoNode, dynamic preTransform, dynamic name,)

Implementation

genMorphGeometry(parentGeo, parentGeoNode, morphGeoNode, preTransform, name) {
  var vertexIndices = (parentGeoNode.PolygonVertexIndex != null) ? parentGeoNode.PolygonVertexIndex.a : [];

  var morphPositionsSparse = (morphGeoNode.Vertices != null) ? morphGeoNode.Vertices.a : [];
  var indices = (morphGeoNode.Indexes != null) ? morphGeoNode.Indexes.a : [];

  var length = parentGeo.attributes.position.count * 3;
  var morphPositions = Float32Array(length);

  for (var i = 0; i < indices.length; i++) {
    var morphIndex = indices[i] * 3;

    morphPositions[morphIndex] = morphPositionsSparse[i * 3];
    morphPositions[morphIndex + 1] = morphPositionsSparse[i * 3 + 1];
    morphPositions[morphIndex + 2] = morphPositionsSparse[i * 3 + 2];
  }

  // TODO: add morph normal support
  var morphGeoInfo = {
    "vertexIndices": vertexIndices,
    "vertexPositions": morphPositions,
  };

  var morphBuffers = genBuffers(morphGeoInfo);

  var positionAttribute = Float32BufferAttribute(morphBuffers.vertex, 3);
  positionAttribute.name = name ?? morphGeoNode.attrName;

  positionAttribute.applyMatrix4(preTransform);

  parentGeo.morphAttributes.position.push(positionAttribute);
}