Method instantiate

tutorials/convert/convert.cpp:104–115

    }
        
    void instantiate(Ref<SceneGraph::GroupNode>& group) 
    {
      for (size_t i=0; i<N; i++) 
      {
        Vec2f r = Vec2f(random<float>(),random<float>());
        Vec2f p = dist->sample(r);
        p.x *= rcp(float(dist->width)); p.y *= rcp(float(dist->height));
        float angle = 2.0f*float(pi)*random<float>();
        const AffineSpace3fa space = heightField->get(p)*AffineSpace3fa::rotate(Vec3fa(0,1,0),angle);
        group->add(new SceneGraph::TransformNode(space,object));
      }
    }

  private:
    Ref<HeightField> heightField;