1 files changed, 121 insertions, 0 deletions
diff --git a/Runtime/Camera/ShadowCulling.h b/Runtime/Camera/ShadowCulling.h
new file mode 100644
index 0000000..d54ca3c
--- /dev/null
+++ b/Runtime/Camera/ShadowCulling.h
@@ -0,0 +1,121 @@
+#pragma once
+
+#include "Configuration/UnityConfigure.h"
+
+#include "Lighting.h"
+#include "Runtime/Math/Matrix4x4.h"
+#include "Runtime/Math/Vector4.h"
+#include "Runtime/Math/Vector3.h"
+#include "Runtime/Math/Rect.h"
+#include "Runtime/Geometry/Plane.h"
+#include "Runtime/Geometry/Sphere.h"
+#include "Runtime/BaseClasses/Tags.h"
+#include "CullingParameters.h"
+#include "ShaderReplaceData.h"
+
+const int kMaxShadowCascades = 4;
+
+class Camera;
+class Light;
+class Transform;
+class AABB;
+class MinMaxAABB;
+struct SceneNode;
+struct CullingOutput;
+struct SceneCullState;
+struct SceneCullingParameters;
+class Shader;
+
+namespace Unity { class Material; }
+namespace Umbra { class Visibility; class Tome; }
+
+struct ShadowCullData
+{
+	Camera*		camera;
+	Matrix4x4f	cameraClipToWorld;
+	Matrix4x4f	cameraWorldToClip;
+	Matrix4x4f	actualWorldToClip;
+	Vector3f	eyePos;
+	Vector3f	viewDir;
+	float		viewWidth, viewHeight; // in pixels
+	float		layerCullDistances[kNumLayers];
+	bool		layerCullSpherical;
+	float		baseFarDistance;
+	Plane		cameraCullPlanes[6];
+	Plane		shadowCullPlanes[6];
+	Vector3f	shadowCullCenter;
+	float		shadowCullRadius;
+	float		shadowCullSquareRadius;
+	bool		useSphereCulling;
+	float		shadowDistance;
+	float		projectionNear;
+	float		projectionFar;
+	float		farPlaneScale;
+
+	const CullingOutput* visbilityForShadowCulling;
+	const SceneCullingParameters* sceneCullParameters;
+
+	ShaderReplaceData shaderReplace;
+};
+
+struct ShadowCasterCull
+{
+	enum { kMaxPlanes = 10 };
+	Plane planes[kMaxPlanes];
+	int planeCount;
+};
+
+struct ShadowCascadeInfo
+{
+	bool enabled;
+	Matrix4x4f lightMatrix;
+	Matrix4x4f viewMatrix;
+	Matrix4x4f projMatrix;
+	Matrix4x4f worldToClipMatrix;
+	Matrix4x4f shadowMatrix;
+	Sphere outerSphere;
+	float minViewDistance;
+	float maxViewDistance;
+	float nearPlane;
+	float farPlane;
+};
+
+struct ShadowCasterPartData
+{
+	int	subMeshIndex;					// 4
+	int	subShaderIndex;					// 4
+	Shader* shader;						// 4
+	Unity::Material* material;			// 4
+										// 16 bytes
+};
+
+struct ShadowCasterData
+{
+	const SceneNode* node;				// 4
+	const AABB*		worldAABB;			// 4
+	size_t			partsStartIndex;	// 4
+	size_t			partsEndIndex;		// 4
+	UInt32			visibleCascades;	// 4
+										// 20 bytes
+};
+
+typedef UNITY_TEMP_VECTOR(ShadowCasterData) ShadowCasters;
+typedef UNITY_TEMP_VECTOR(ShadowCasterPartData) ShadowCasterParts;
+
+void CalculateShadowCasterCull(const Plane frustumCullPlanes[6], const Matrix4x4f& clipToWorld, const Vector3f& centerWorld, float nearPlaneScale, float farPlaneScale, LightType lightType, const Vector3f& lightVec, ShadowCasterCull& result, const bool alreadyTested[kPlaneFrustumNum]);
+void CalculateShadowCasterCull (const Plane frustumClipPlanes[6], const Matrix4x4f& clipToWorld, const Vector3f& centerWorld, float nearPlaneScale, float farPlaneScale, LightType lightType, const Transform& trans, ShadowCasterCull& result);
+void SetupShadowCullData (Camera& camera, const Vector3f& cameraPos, const ShaderReplaceData& shaderReplaceData, const SceneCullingParameters* sceneCullParams, ShadowCullData& cullData);
+float CalculateShadowDistance (const Camera& camera);
+float CalculateShadowSphereOffset (const Camera& camera);
+bool CalculateSphericalShadowRange (const Camera& camera, Vector3f& outCenter, float& outRadius);
+void CalculateLightShadowFade (const Camera& camera, float shadowStrength, Vector4f& outParams, Vector4f& outCenterAndType);
+
+void CullDirectionalCascades(ShadowCasters& casters, const ShadowCascadeInfo cascades[kMaxShadowCascades], int cascadeCount,
+							 const Quaternionf& lightRot, const Vector3f& lightDir, const ShadowCullData& cullData);
+
+void CullShadowCasters (const Light& light, const ShadowCullData& cullData, bool excludeLightmapped, CullingOutput& cullingOutput  );
+
+void GenerateShadowCasterParts (const Light& light, const ShadowCullData& cullData, const CullingOutput& visibleRenderers, MinMaxAABB& casterBounds, ShadowCasters& casters, ShadowCasterParts& casterParts);
+
+
+bool IsObjectWithinShadowRange (const ShadowCullData& shadowCullData, const AABB& bounds);