00001 /* 00002 ----------------------------------------------------------------------------- 00003 This source file is part of OGRE 00004 (Object-oriented Graphics Rendering Engine) 00005 For the latest info, see http://www.ogre3d.org/ 00006 00007 Copyright (c) 2000-2006 Torus Knot Software Ltd 00008 Also see acknowledgements in Readme.html 00009 00010 This program is free software; you can redistribute it and/or modify it under 00011 the terms of the GNU Lesser General Public License as published by the Free Software 00012 Foundation; either version 2 of the License, or (at your option) any later 00013 version. 00014 00015 This program is distributed in the hope that it will be useful, but WITHOUT 00016 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 00017 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. 00018 00019 You should have received a copy of the GNU Lesser General Public License along with 00020 this program; if not, write to the Free Software Foundation, Inc., 59 Temple 00021 Place - Suite 330, Boston, MA 02111-1307, USA, or go to 00022 http://www.gnu.org/copyleft/lesser.txt. 00023 00024 You may alternatively use this source under the terms of a specific version of 00025 the OGRE Unrestricted License provided you have obtained such a license from 00026 Torus Knot Software Ltd. 00027 ----------------------------------------------------------------------------- 00028 */ 00029 #ifndef __ShadowCaster_H__ 00030 #define __ShadowCaster_H__ 00031 00032 #include "OgrePrerequisites.h" 00033 #include "OgreRenderable.h" 00034 00035 00036 namespace Ogre { 00037 00038 00047 class _OgreExport ShadowRenderable : public Renderable, public ShadowDataAlloc 00048 { 00049 protected: 00050 MaterialPtr mMaterial; 00051 RenderOperation mRenderOp; 00052 ShadowRenderable* mLightCap; // used only if isLightCapSeparate == true 00053 public: 00054 ShadowRenderable() : mMaterial(), mLightCap(0) {} 00055 virtual ~ShadowRenderable() { delete mLightCap; } 00059 void setMaterial(const MaterialPtr& mat) { mMaterial = mat; } 00061 const MaterialPtr& getMaterial(void) const { return mMaterial; } 00063 void getRenderOperation(RenderOperation& op) { op = mRenderOp; } 00065 RenderOperation* getRenderOperationForUpdate(void) {return &mRenderOp;} 00067 void getWorldTransforms(Matrix4* xform) const = 0; 00069 Real getSquaredViewDepth(const Camera*) const{ return 0; /* not used */} 00071 const LightList& getLights(void) const; 00082 bool isLightCapSeparate(void) const { return mLightCap != 0; } 00083 00085 ShadowRenderable* getLightCapRenderable(void) { return mLightCap; } 00087 virtual bool isVisible(void) const { return true; } 00088 00089 }; 00090 00092 enum ShadowRenderableFlags 00093 { 00095 SRF_INCLUDE_LIGHT_CAP = 0x00000001, 00097 SRF_INCLUDE_DARK_CAP = 0x00000002, 00099 SRF_EXTRUDE_TO_INFINITY = 0x00000004 00100 }; 00101 00104 class _OgreExport ShadowCaster 00105 { 00106 public: 00107 virtual ~ShadowCaster() { } 00109 virtual bool getCastShadows(void) const = 0; 00110 00112 virtual EdgeData* getEdgeList(void) = 0; 00114 virtual bool hasEdgeList(void) = 0; 00115 00117 virtual const AxisAlignedBox& getWorldBoundingBox(bool derive = false) const = 0; 00119 virtual const AxisAlignedBox& getLightCapBounds(void) const = 0; 00121 virtual const AxisAlignedBox& getDarkCapBounds(const Light& light, Real dirLightExtrusionDist) const = 0; 00122 00123 typedef std::vector<ShadowRenderable*> ShadowRenderableList; 00124 typedef VectorIterator<ShadowRenderableList> ShadowRenderableListIterator; 00125 00141 virtual ShadowRenderableListIterator getShadowVolumeRenderableIterator( 00142 ShadowTechnique shadowTechnique, const Light* light, 00143 HardwareIndexBufferSharedPtr* indexBuffer, 00144 bool extrudeVertices, Real extrusionDistance, unsigned long flags = 0 ) = 0; 00145 00165 static void extrudeVertices(const HardwareVertexBufferSharedPtr& vertexBuffer, 00166 size_t originalVertexCount, const Vector4& lightPos, Real extrudeDist); 00168 virtual Real getPointExtrusionDistance(const Light* l) const = 0; 00169 protected: 00171 Real getExtrusionDistance(const Vector3& objectPos, const Light* light) const; 00179 virtual void updateEdgeListLightFacing(EdgeData* edgeData, 00180 const Vector4& lightPos); 00181 00195 virtual void generateShadowVolume(EdgeData* edgeData, 00196 const HardwareIndexBufferSharedPtr& indexBuffer, const Light* light, 00197 ShadowRenderableList& shadowRenderables, unsigned long flags); 00204 virtual void extrudeBounds(AxisAlignedBox& box, const Vector4& lightPos, 00205 Real extrudeDist) const; 00206 00207 00208 }; 00209 } 00210 00211 #endif
Copyright © 2008 Torus Knot Software Ltd
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Sun Sep 27 22:02:26 2009