shadowSource.h

/**
 *
 * RenderPipeline
 *
 * Copyright (c) 2014-2016 tobspr <tobias.springer1@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */


#ifndef SHADOWSOURCE_H
#define SHADOWSOURCE_H

#include "pandabase.h"
#include "luse.h"
#include "transformState.h"
#include "look_at.h"
#include "compose_matrix.h"
#include "perspectiveLens.h"
#include "boundingVolume.h"
#include "boundingSphere.h"
#include "boundingHexahedron.h"
#include "geometricBoundingVolume.h"

#include "gpuCommand.h"

/**
 * @brief This class represents a single shadow source.
 * @details The ShadowSource can be seen as a Camera. It is used by the Lights
 *   to render their shadows. Each ShadowSource has a position in the atlas,
 *   and a view-projection matrix. The shadow manager regenerates the shadow maps
 *   using the data from the shadow sources.
 */
class ShadowSource {
public:
  ShadowSource();

  inline void write_to_command(GPUCommand &cmd) const;

  inline void set_needs_update(bool flag);
  inline void set_slot(int slot);
  inline void set_region(const LVecBase4i& region, const LVecBase4& region_uv);
  inline void set_resolution(size_t resolution);
  inline void set_perspective_lens(PN_stdfloat fov, PN_stdfloat near_plane,
                                   PN_stdfloat far_plane, LVecBase3 pos,
                                   LVecBase3 direction);
  inline void set_matrix_lens(const LMatrix4& mvp);

  inline bool has_region() const;
  inline bool has_slot() const;

  inline void clear_region();

  inline int get_slot() const;
  inline bool get_needs_update() const;
  inline size_t get_resolution() const;
  inline const LMatrix4& get_mvp() const;
  inline const LVecBase4i& get_region() const;
  inline const LVecBase4& get_uv_region() const;

  inline const BoundingSphere& get_bounds() const;

private:
  int _slot;
  bool _needs_update;
  size_t _resolution;
  LMatrix4 _mvp;
  LVecBase4i _region;
  LVecBase4 _region_uv;

  BoundingSphere _bounds;
};

#include "shadowSource.I"

#endif // SHADOWSOURCE_H