checkTriangleVisibility method
Implementation
bool checkTriangleVisibility(RenderableVertex v1, RenderableVertex v2, RenderableVertex v3) {
if (v1.visible == true || v2.visible == true || v3.visible == true) return true;
_points3[0] = v1.positionScreen.toVector3();
_points3[1] = v2.positionScreen.toVector3();
_points3[2] = v3.positionScreen.toVector3();
return _clipBox.intersectsBox(_boundingBox.setFromPoints(_points3));
}