createGeometry method

@override Future createGeometry(List<double> vertices, List<int> indices, { String? materialPath, PrimitiveType primitiveType = PrimitiveType.TRIANGLES, })

Creates a (renderable) entity with the specified geometry and adds to the scene.

Implementation

@override
Future createGeometry(List<double> vertices, List<int> indices,
    {String? materialPath,
    PrimitiveType primitiveType = PrimitiveType.TRIANGLES}) async {
  final verticesData = td.Float32List.fromList(vertices);
  final indicesData = Uint16List.fromList(indices);
  final verticesPtr = _module._malloc(verticesData.lengthInBytes);
  final indicesPtr = _module._malloc(indicesData.lengthInBytes);
  _module.writeArrayToMemory(
      verticesData.buffer.asUint8List().toJS, verticesPtr);
  _module.writeArrayToMemory(
      indicesData.buffer.asUint8List().toJS, indicesPtr);

  final entityId = _module.ccall(
      "create_geometry",
      "int",
      [
        "void*".toJS,
        "float*".toJS,
        "int".toJS,
        "uint16_t*".toJS,
        "int".toJS,
        "int".toJS,
        "string".toJS
      ].toJS,
      [
        _viewer!,
        verticesPtr,
        vertices.length.toJS,
        indicesPtr,
        indices.length.toJS,
        primitiveType.index.toJS,
        materialPath?.toJS ?? "".toJS,
      ].toJS,
      null) as JSNumber;

  _module._free(verticesPtr);
  _module._free(indicesPtr);

  if (entityId.toDartInt == -1) {
    throw Exception("Failed to create geometry");
  }
  return entityId.toDartInt;
}