Init

kaplademo/source/demoFramework/ShadowMap.h

@@ -0,0 +1,107 @@
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//  * Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//  * Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+//  * Neither the name of NVIDIA CORPORATION nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+// PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Copyright (c) 2007-2018 NVIDIA Corporation. All rights reserved.
+//----------------------------------------------------------------------------------
+// File:   ShadowMapping.cpp
+// Original Author: Rouslan Dimitrov
+// Modified by: Nuttapong Chentanez and Matthias Mueller-Fischer
+//----------------------------------------------------------------------------------
+
+
+#ifndef SHADOWMAP_H
+#define SHADOWMAP_H
+
+#include "foundation/PxVec3.h"
+#include <GL/glew.h>
+
+using namespace physx;
+
+#define FAR_DIST 200.0
+#define MAX_SPLITS 1
+#define LIGHT_FOV 45.0
+
+//--------------------------------------------------------------------------
+class ShadowMap
+{
+public:
+	ShadowMap( int w, int h, float fovi, int matOffseti, int resolution = 4096);
+
+	void makeShadowMap(const PxVec3 &cameraPos, const PxVec3 &cameraDir, const PxVec3 &lightDir, float znear, float zfar,
+		void (*renderShadowCasters)());
+
+	// call before the map is used for rendering
+	void prepareForRender(float* cam_modelview, float* cam_proj);
+	// call when rendering is done
+	void doneRender();
+
+	int    getTextureSize() { return depth_size; }
+	GLuint getDepthTexArray() { return depth_tex_ar; }
+	float  getFarBound(int i) { return far_bound[i]; }
+	int    getNumSplits() { return cur_num_splits; }
+
+private:
+	struct Frustum {
+		float neard;
+		float fard;
+		float fov;
+		float ratio;
+		PxVec3 point[8];
+	};
+
+	struct Vec4;
+	struct Matrix44;
+
+	void updateFrustumPoints(Frustum &f, const PxVec3 &center, const PxVec3 &view_dir);
+	void updateSplitDist(Frustum f[MAX_SPLITS], float nd, float fd);
+	float applyCropMatrix(Frustum &f);
+
+	void cameraInverse(float dst[16], float src[16]);
+	void init();
+
+	float far_bound[MAX_SPLITS];
+
+	float minZAdd;
+	float maxZAdd;
+
+	float shadowOff;
+	float shadowOff2;
+	float fov;
+
+	int cur_num_splits;
+	int width;
+	int height;
+	int depth_size ;
+
+	GLuint depth_fb;
+	GLuint depth_tex_ar;
+	
+	Frustum f[MAX_SPLITS];
+	float shad_cpm[MAX_SPLITS][16];
+
+	float split_weight;
+	int matOffset;
+};
+#endif