merge method

BufferGeometry merge(
  1. BufferGeometry geometry, [
  2. int? offset
])
inherited

Implementation

BufferGeometry merge(BufferGeometry geometry, [int? offset]) {
  if (offset == null) {
    offset = 0;

    console.warning('BufferGeometry.merge(): Overwriting original geometry, starting at offset=0.\nUse BufferGeometryUtils.mergeBufferGeometries() for lossless merge.');
  }

  final attributes = this.attributes;

  for (String key in attributes.keys) {
    if (geometry.attributes[key] != null) {
      final attribute1 = attributes[key];
      final attributeArray1 = attribute1.array;

      final attribute2 = geometry.attributes[key];
      final attributeArray2 = attribute2.array;

      final attributeOffset = attribute2.itemSize * offset;
      final length = math.min<int>(attributeArray2.length, attributeArray1.length - attributeOffset);

      for (int i = 0, j = attributeOffset; i < length; i++, j++) {
        attributeArray1[j] = attributeArray2[i];
      }
    }
  }

  return this;
}