Revert "Revert "Shadows""

This reverts commit 73b8bff1f3.
2016-03-07 19:45:46 +01:00
parent 3edc2f4819
commit 2049d630e9
21 changed files with 2280 additions and 9 deletions
@@ -0,0 +1,87 @@
+#ifndef ShadowPass_h__
+#define ShadowPass_h__
+
+#include "IRenderer.h"
+#include "FrameBuffer.h"
+#include "ShaderProgram.h"
+#include "../Core/EventBroker.h"
+#include "../Core/World.h"
+#include "ShadowPassState.h"
+#include "imgui/imgui.h"
+
+#define MAX_SPLITS 4
+
+enum NearFar { NEAR = 0, FAR = 1 };
+enum LRBT { LEFT = 0, RIGHT = 1, BOTTOM = 2, TOP = 3 };
+
+struct ShadowFrustum
+{
+	float NearClip;
+	float FarClip;
+	float FOV;
+	float AspectRatio;
+	glm::vec3 MiddlePoint;
+	float Radius;
+	std::array<float, 4> LRBT;
+	std::array<glm::vec3, 8> CornerPoint;
+};
+
+class ShadowPass
+{
+public:
+	ShadowPass(IRenderer* renderer);
+	ShadowPass(IRenderer * renderer, int ShadowResX, int ShadowResY);
+	~ShadowPass();
+
+	void InitializeFrameBuffers();
+	void InitializeShaderPrograms();
+	void ClearBuffer();
+	void Draw(RenderScene& scene);
+
+	void DebugGUI();
+
+	GLuint DepthMap() const { return m_DepthMap; }
+	std::array<glm::mat4, MAX_SPLITS> LightP() const { return m_LightProjection; }
+	std::array<glm::mat4, MAX_SPLITS> LightV() const { return m_LightView; }
+	std::array<float, MAX_SPLITS> FarDistance() const { std::array<float, MAX_SPLITS> f; for (int i = 0; i < MAX_SPLITS; i++) f[i] = m_shadowFrusta[i].FarClip; return f; }
+	int CurrentNrOfSplits() const { return m_CurrentNrOfSplits; }
+
+	void SetSplitWeight(float split_weight) { m_SplitWeight = split_weight; };
+private:
+	void InitializeCameras(RenderScene & scene);
+	void UpdateSplitDist(std::array<ShadowFrustum, MAX_SPLITS>& frusta, float near_distance, float far_distance);
+	void UpdateFrustumPoints(ShadowFrustum& frustum, glm::vec3 camera_position, glm::vec3 view_dir);
+	void UpdateFrustumPoints(ShadowFrustum& frustum, glm::mat4 p, glm::mat4 v);
+
+	void PointsToLightspace(ShadowFrustum& frustum, glm::mat4 v);
+
+	float FindRadius(ShadowFrustum& frustum);
+	void RadiusToLightspace(ShadowFrustum& frustum);
+
+	EventBroker* m_EventBroker;
+	const IRenderer* m_Renderer;
+
+	GLuint m_DepthMap;
+	FrameBuffer m_DepthBuffer;
+	ShaderProgram* m_ShadowProgram;
+
+	std::array<glm::mat4, MAX_SPLITS> m_LightProjection;
+	std::array<glm::mat4, MAX_SPLITS> m_LightView;
+
+	GLfloat m_NearFarPlane[2] = { -34.f, 27.f };
+	GLuint m_ResolutionSizeWidth = 1024 * 2;
+	GLuint m_ResolutionSizeHeight = 1024 * 2;
+
+	bool m_TransparentObjects = false;
+	bool m_TexturedShadows = false;
+	bool m_EnableShadows = true;
+
+	int m_CurrentNrOfSplits = 4;
+	float m_SplitWeight = 0.962f;
+
+	std::array<ShadowFrustum, MAX_SPLITS> m_shadowFrusta;
+
+	Texture* m_WhiteTexture = ResourceManager::Load<Texture>("Textures/Core/White.png");
+};
+
+#endif