update method

void update()

Implementation

void update() {
  object.updateMatrixWorld(true);
  _normalMatrix.getNormalMatrix(object.matrixWorld);

  final matrixWorld = object.matrixWorld;
  final position = geometry?.attributes["position"];


  BufferGeometry? objGeometry = object.geometry;

  if (objGeometry != null) {
    final objPos = objGeometry.attributes["position"];
    final objNorm = objGeometry.attributes["normal"];

    int idx = 0;

    // for simplicity, ignore index and drawcalls, and render every normal

    for (int j = 0, jl = objPos.count; j < jl; j++) {
      _v1.fromBuffer(objPos, j).applyMatrix4(matrixWorld);

      _v2.fromBuffer(objNorm, j);

      _v2.applyMatrix3(_normalMatrix)
          .normalize()
          .scale(size)
          .add(_v1);

      position.setXYZ(idx, _v1.x, _v1.y, _v1.z);
      idx = idx + 1;
      position.setXYZ(idx, _v2.x, _v2.y, _v2.z);
      idx = idx + 1;
    }
  }

  position.needsUpdate = true;
}