DeferredLight.hh

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/*
 * Copyright (C) 2012-2015 Open Source Robotics Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
*/
#ifndef _DEFERREDLIGHT_HH_
#define _DEFERREDLIGHT_HH_

#include <OgreSimpleRenderable.h>
#include <OgreInstancedEntity.h>
#include <OgreTechnique.h>

#include "gazebo/rendering/deferred_shading/MaterialGenerator.hh"
#include "gazebo/util/system.hh"

namespace gazebo
{
  namespace rendering
  {
    class GAZEBO_VISIBLE DeferredLight: public Ogre::SimpleRenderable
    {
      public: DeferredLight(MaterialGenerator *_gen, Ogre::Light *_parentLight,
                            Ogre::MaterialPtr _vplMaterial);

      public: ~DeferredLight();

      public: void UpdateFromParent();

      public: void UpdateFromCamera(Ogre::Camera *_camera);

      public: virtual bool getCastShadows() const;

      public: virtual Ogre::Real getBoundingRadius(void) const;

      public: virtual Ogre::Real getSquaredViewDepth(const Ogre::Camera*) const;

      public: virtual const Ogre::MaterialPtr &getMaterial(void) const;

      public: virtual void getWorldTransforms(Ogre::Matrix4 *_xform) const;

      public: virtual void UpdateRSM(const Ogre::TexturePtr &_shadowTex);
      public: virtual void UpdateShadowInvProj(Ogre::Matrix4 &_invproj);
      public: Ogre::Light *GetParentLight() {return this->parentLight;}

      public: void SetVPLCount(uint32_t _n, Ogre::SceneManager *_sm,
                               Ogre::InstanceManager *_im);

      public: void RenderVPLs(Ogre::SceneManager *_sm,
                              Ogre::InstanceManager *_im);

      protected: bool IsCameraInsideLight(Ogre::Camera *_camera);

      protected: void RebuildGeometry(float _radius);

      protected: void CreateSphere(float _radius, int _nRings, int _nSegments);

      protected: void CreateRectangle2D();

      protected: void CreateCone(float _radius, float _height,
                                 int _nVerticesInBase);

      protected: void SetAttenuation(float _c, float _b, float _a);

      protected: void SetSpecularColor(const Ogre::ColourValue &_col);

      protected: Ogre::Light *parentLight;

      protected: bool ignoreWorld;

      protected: float radius;

      protected: MaterialGenerator *generator;

      protected: unsigned int permutation;

      protected: Ogre::MaterialPtr VPLMaterial;
    };
  }
}
#endif