fromGeometry static method

CSG fromGeometry(BufferGeometry geometry)

Implementation

static CSG fromGeometry(BufferGeometry geometry){
  List<Polygon> polys = [];

  if (geometry.index != null) {
    geometry = geometry.toNonIndexed();
  }

  final positions = geometry.attributes['position'];
  final normals = geometry.attributes['normal'];
  final uvs = geometry.attributes['uv'];
  final colorattr = geometry.attributes['color'];

  // TODO
  // const colors = geometry.attributes.color;

  Vertex createVertex(int index) {
    final position = Vector3(
      positions.getX(index),
      positions.getY(index),
      positions.getZ(index)
    );
    final normal = Vector3(
      normals.getX(index),
      normals.getY(index),
      normals.getZ(index)
    );

    final uv = Vector3(uvs.getX(index), uvs.getY(index),0);
    final color = colorattr != null?Vector3(colorattr.getX(index),colorattr.getY(index),colorattr.getZ(index)): null;
    return Vertex(position, normal, uv, color);
  }

  for (int i = 0; i < positions.count; i += 3) {
    final v1 = createVertex(i);
    final v2 = createVertex(i + 1);
    final v3 = createVertex(i + 2);
    polys.add(Polygon([v1, v2, v3]));
  }

  //return this;
  return CSG.fromPolygons(polys.where((p) => !p.plane.normal.x.isNaN).toList());
}