createGeometry method

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

Implementation

@override
Future<ThermionEntity> createGeometry(
    List<double> vertices, List<int> indices,
    {String? materialPath,
    PrimitiveType primitiveType = PrimitiveType.TRIANGLES}) async {
  if (_viewer == null) {
    throw Exception("Viewer must not be null");
  }

  final materialPathPtr =
      materialPath?.toNativeUtf8(allocator: allocator) ?? nullptr;
  final vertexPtr = allocator<Float>(vertices.length);
  final indicesPtr = allocator<Uint16>(indices.length);
  for (int i = 0; i < vertices.length; i++) {
    vertexPtr.elementAt(i).value = vertices[i];
  }

  for (int i = 0; i < indices.length; i++) {
    (indicesPtr + i).value = indices[i];
  }

  var entity = await withIntCallback((callback) => create_geometry_ffi(
      _viewer!,
      vertexPtr,
      vertices.length,
      indicesPtr,
      indices.length,
      primitiveType.index,
      materialPathPtr.cast<Char>(),
      callback));
  if (entity == _FILAMENT_ASSET_ERROR) {
    throw Exception("Failed to create geometry");
  }

  _scene!.registerEntity(entity);

  allocator.free(materialPathPtr);
  allocator.free(vertexPtr);
  allocator.free(indicesPtr);

  return entity;
}