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) 2000-2009 Torus Knot Software Ltd 00008 00009 Permission is hereby granted, free of charge, to any person obtaining a copy 00010 of this software and associated documentation files (the "Software"), to deal 00011 in the Software without restriction, including without limitation the rights 00012 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 00013 copies of the Software, and to permit persons to whom the Software is 00014 furnished to do so, subject to the following conditions: 00015 00016 The above copyright notice and this permission notice shall be included in 00017 all copies or substantial portions of the Software. 00018 00019 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00020 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00021 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 00022 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00023 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00024 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 00025 THE SOFTWARE. 00026 ----------------------------------------------------------------------------- 00027 */ 00028 #ifndef __ShadowCaster_H__ 00029 #define __ShadowCaster_H__ 00030 00031 #include "OgrePrerequisites.h" 00032 #include "OgreRenderable.h" 00033 00034 00035 namespace Ogre { 00036 00037 00052 class _OgreExport ShadowRenderable : public Renderable, public ShadowDataAlloc 00053 { 00054 protected: 00055 MaterialPtr mMaterial; 00056 RenderOperation mRenderOp; 00057 ShadowRenderable* mLightCap; // used only if isLightCapSeparate == true 00058 public: 00059 ShadowRenderable() : mMaterial(), mLightCap(0) {} 00060 virtual ~ShadowRenderable() { delete mLightCap; } 00064 void setMaterial(const MaterialPtr& mat) { mMaterial = mat; } 00066 const MaterialPtr& getMaterial(void) const { return mMaterial; } 00068 void getRenderOperation(RenderOperation& op) { op = mRenderOp; } 00070 RenderOperation* getRenderOperationForUpdate(void) {return &mRenderOp;} 00072 void getWorldTransforms(Matrix4* xform) const = 0; 00074 Real getSquaredViewDepth(const Camera*) const{ return 0; /* not used */} 00076 const LightList& getLights(void) const; 00087 bool isLightCapSeparate(void) const { return mLightCap != 0; } 00088 00090 ShadowRenderable* getLightCapRenderable(void) { return mLightCap; } 00092 virtual bool isVisible(void) const { return true; } 00093 00094 }; 00095 00097 enum ShadowRenderableFlags 00098 { 00100 SRF_INCLUDE_LIGHT_CAP = 0x00000001, 00102 SRF_INCLUDE_DARK_CAP = 0x00000002, 00104 SRF_EXTRUDE_TO_INFINITY = 0x00000004 00105 }; 00106 00109 class _OgreExport ShadowCaster 00110 { 00111 public: 00112 virtual ~ShadowCaster() { } 00114 virtual bool getCastShadows(void) const = 0; 00115 00117 virtual EdgeData* getEdgeList(void) = 0; 00119 virtual bool hasEdgeList(void) = 0; 00120 00122 virtual const AxisAlignedBox& getWorldBoundingBox(bool derive = false) const = 0; 00124 virtual const AxisAlignedBox& getLightCapBounds(void) const = 0; 00126 virtual const AxisAlignedBox& getDarkCapBounds(const Light& light, Real dirLightExtrusionDist) const = 0; 00127 00128 typedef vector<ShadowRenderable*>::type ShadowRenderableList; 00129 typedef VectorIterator<ShadowRenderableList> ShadowRenderableListIterator; 00130 00146 virtual ShadowRenderableListIterator getShadowVolumeRenderableIterator( 00147 ShadowTechnique shadowTechnique, const Light* light, 00148 HardwareIndexBufferSharedPtr* indexBuffer, 00149 bool extrudeVertices, Real extrusionDistance, unsigned long flags = 0 ) = 0; 00150 00170 static void extrudeVertices(const HardwareVertexBufferSharedPtr& vertexBuffer, 00171 size_t originalVertexCount, const Vector4& lightPos, Real extrudeDist); 00173 virtual Real getPointExtrusionDistance(const Light* l) const = 0; 00174 protected: 00176 Real getExtrusionDistance(const Vector3& objectPos, const Light* light) const; 00184 virtual void updateEdgeListLightFacing(EdgeData* edgeData, 00185 const Vector4& lightPos); 00186 00200 virtual void generateShadowVolume(EdgeData* edgeData, 00201 const HardwareIndexBufferSharedPtr& indexBuffer, const Light* light, 00202 ShadowRenderableList& shadowRenderables, unsigned long flags); 00209 virtual void extrudeBounds(AxisAlignedBox& box, const Vector4& lightPos, 00210 Real extrudeDist) const; 00211 00212 00213 }; 00216 } 00217 00218 #endif
Copyright © 2008 Torus Knot Software Ltd
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Last modified Wed Nov 3 2010 19:24:52