CallbackRenderer.hh

 
#ifndef GRAMODS_GRAPHICS_CALLBACKRENDERER
#define GRAMODS_GRAPHICS_CALLBACKRENDERER
 
#include <gmGraphics/Renderer.hh>
 
BEGIN_NAMESPACE_GMGRAPHICS;
 
class CallbackRenderer
  : public Renderer {
 
public:
 
  typedef std::function<void(void)> SetupFunction;
 
  typedef std::function<void(const Camera &, const Eigen::Affine3f &)>
      RenderFunction;
 
  typedef std::function<void(
      const Camera &, const Eigen::Affine3f &, float &, float &)>
      NearFarFunction;
 
  void render(const Camera &camera, const Eigen::Affine3f &Mm) override {
    if (!has_been_setup) {
      if (setup_function) setup_function();
      has_been_setup = true;
    }
    if (render_function) render_function(camera, Mm);
  }
 
  void getNearFar(const Camera &camera,
                  const Eigen::Affine3f &Mm,
                  float &near,
                  float &far) override {
    if (!nearfar_function) return;
    nearfar_function(camera, Mm, near, far);
  }
 
  void setCallback(SetupFunction func) { setup_function = func; }
 
  void setCallback(RenderFunction func) { render_function = func; }
 
  void setCallback(NearFarFunction func) { nearfar_function = func; }
 
private:
 
  SetupFunction setup_function;
  RenderFunction render_function;
  NearFarFunction nearfar_function;
  bool has_been_setup = false;
 
};
 
END_NAMESPACE_GMGRAPHICS;
 
#endif