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// Copyright 1996-2023 Cyberbotics Ltd.
//
// 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
//
// https://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 SHADOW_VOLUME_CASTER_HPP
#define SHADOW_VOLUME_CASTER_HPP
#include "LightNode.hpp"
#include "Primitive.hpp"
#include <unordered_map>
#include <vector>
namespace wren {
class DirectionalLight;
class PointLight;
class Renderable;
class ShaderProgram;
class ShadowVolumeCaster {
public:
struct ShadowVolume {
ShadowVolume() :
mIndexCountSides(0),
mIndexCountCaps(0),
mIsDirty(true),
mGlNameSidesIndexBuffer(0),
mGlNameCapsIndexBuffer(0),
mAabb(gAabbInf),
mAabbDirty(true) {}
int mIndexCountSides;
int mIndexCountCaps;
bool mIsDirty;
unsigned int mGlNameSidesIndexBuffer;
unsigned int mGlNameCapsIndexBuffer;
primitive::Aabb mAabb;
bool mAabbDirty;
};
explicit ShadowVolumeCaster(Renderable *renderable);
~ShadowVolumeCaster();
Renderable *renderable() const { return mRenderable; }
const primitive::Aabb &aabb(LightNode *light);
void notifyRenderableDirty(); // called when Renderable transform changes
void notifyLightDirty(LightNode *light, bool aabbOnly = false); // called when Light transform changes
void notifyLightRemoved(LightNode *light); // called when light is destroyed or stops casting shadows
void computeSilhouette(LightNode *light, bool computeCaps = true);
void renderSides(LightNode *light) const;
void renderCaps(LightNode *light) const;
private:
Renderable *mRenderable;
bool mHasCaps;
std::unordered_map<LightNode *, ShadowVolume> mShadowVolumes;
};
} // namespace wren
#endif // SHADOW_VOLUME_CASTER_HPP