FakeShemp
79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
#ifndef ShadowPass_h_
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#define ShadowPass_h_
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#include "IRenderer.h"
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#include "FrameBuffer.h"
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#include "ShaderProgram.h"
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#include "../Core/EventBroker.h"
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#include "../Core/World.h"
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#include "ShadowPassState.h"
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#include "imgui/imgui.h"
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#define MAX_SPLITS 4
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enum NearFar { NEAR = 0, FAR = 1 };
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enum LRBT { LEFT = 0, RIGHT = 1, BOTTOM = 2, TOP = 3 };
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struct Frustum
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{
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float NearClip;
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float FarClip;
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float FOV;
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float AspectRatio;
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glm::vec3 MiddlePoint;
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float Radius;
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std::array<float, 4> LRBT;
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std::array<glm::vec3, 8> CornerPoint;
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};
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class ShadowPass
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{
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public:
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ShadowPass(IRenderer* renderer);
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ShadowPass(IRenderer * renderer, int ShadowResX, int ShadowResY);
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~ShadowPass();
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void InitializeFrameBuffers();
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void InitializeShaderPrograms();
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void ClearBuffer();
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void Draw(RenderScene& scene);
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GLuint DepthMap() const { return m_DepthMap; }
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std::array<glm::mat4, MAX_SPLITS> LightP() const { return m_LightProjection; }
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std::array<glm::mat4, MAX_SPLITS> LightV() const { return m_LightView; }
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std::array<float, MAX_SPLITS> FarDistance() const { return{ m_shadowFrusta[0].FarClip, m_shadowFrusta[1].FarClip, m_shadowFrusta[2].FarClip, m_shadowFrusta[3].FarClip }; }
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int CurrentNrOfSplits() const { return m_CurrentNrOfSplits; }
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void SetSplitWeight(float split_weight) { m_SplitWeight = split_weight; };
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private:
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void InitializeCameras(RenderScene & scene);
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void UpdateSplitDist(std::array<Frustum, MAX_SPLITS>& frusta, float near_distance, float far_distance);
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void UpdateFrustumPoints(Frustum& frustum, glm::vec3 camera_position, glm::vec3 view_dir);
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void UpdateFrustumPoints(Frustum& frustum, glm::mat4 p, glm::mat4 v);
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void PointsToLightspace(Frustum& frustum, glm::mat4 v);
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float FindRadius(Frustum& frustum);
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void RadiusToLightspace(Frustum& frustum);
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EventBroker* m_EventBroker;
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const IRenderer* m_Renderer;
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GLuint m_DepthMap;
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FrameBuffer m_DepthBuffer;
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ShaderProgram* m_ShadowProgram;
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std::array<glm::mat4, MAX_SPLITS> m_LightProjection;
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std::array<glm::mat4, MAX_SPLITS> m_LightView;
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GLfloat m_NearFarPlane[2] = { -34.f, 27.f };
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GLuint m_ResolutionSizeWidth = 1024 * 2;
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GLuint m_ResolutionSizeHeight = 1024 * 2;
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int m_CurrentNrOfSplits = 4;
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float m_SplitWeight = 0.91f;
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std::array<Frustum, MAX_SPLITS> m_shadowFrusta;
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};
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#endif |