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 __PatchSurface_H__ 00030 #define __PatchSurface_H__ 00031 00032 #include "OgrePrerequisites.h" 00033 00034 #include "OgreVector3.h" 00035 #include "OgreString.h" 00036 #include "OgreRenderOperation.h" 00037 #include "OgreAxisAlignedBox.h" 00038 00039 namespace Ogre { 00040 00047 class _OgreExport PatchSurface : public PatchAlloc 00048 { 00049 public: 00050 PatchSurface(); 00051 ~PatchSurface(); 00052 00053 enum PatchSurfaceType 00054 { 00056 PST_BEZIER 00057 }; 00058 00060 enum 00061 { 00062 AUTO_LEVEL = -1 00063 }; 00064 00065 enum VisibleSide { 00067 VS_FRONT, 00069 VS_BACK, 00071 VS_BOTH 00072 }; 00100 void defineSurface(void* controlPointBuffer, 00101 VertexDeclaration *declaration, size_t width, size_t height, 00102 PatchSurfaceType pType = PST_BEZIER, 00103 size_t uMaxSubdivisionLevel = AUTO_LEVEL, size_t vMaxSubdivisionLevel = AUTO_LEVEL, 00104 VisibleSide visibleSide = VS_FRONT); 00105 00111 size_t getRequiredVertexCount(void) const; 00117 size_t getRequiredIndexCount(void) const; 00118 00120 size_t getCurrentIndexCount(void) const; 00122 size_t getIndexOffset(void) const { return mIndexOffset; } 00124 size_t getVertexOffset(void) const { return mVertexOffset; } 00125 00126 00128 const AxisAlignedBox& getBounds(void) const; 00131 Real getBoundingSphereRadius(void) const; 00147 void build(HardwareVertexBufferSharedPtr destVertexBuffer, size_t vertexStart, 00148 HardwareIndexBufferSharedPtr destIndexBuffer, size_t indexStart); 00149 00158 void setSubdivisionFactor(Real factor); 00159 00161 Real getSubdivisionFactor(void) const; 00162 00163 void* getControlPointBuffer(void) const 00164 { 00165 return mControlPointBuffer; 00166 } 00169 void notifyControlPointBufferDeallocated(void) { 00170 mControlPointBuffer = 0; 00171 } 00172 protected: 00174 VertexDeclaration* mDeclaration; 00176 void* mControlPointBuffer; 00178 PatchSurfaceType mType; 00180 size_t mCtlWidth; 00182 size_t mCtlHeight; 00184 size_t mCtlCount; 00186 size_t mULevel; 00188 size_t mVLevel; 00190 size_t mMaxULevel; 00191 size_t mMaxVLevel; 00193 size_t mMeshWidth; 00195 size_t mMeshHeight; 00197 VisibleSide mVSide; 00198 00199 Real mSubdivisionFactor; 00200 00201 std::vector<Vector3> mVecCtlPoints; 00202 00205 size_t findLevel( Vector3& a, Vector3& b, Vector3& c); 00206 00207 void distributeControlPoints(void* lockedBuffer); 00208 void subdivideCurve(void* lockedBuffer, size_t startIdx, size_t stepSize, size_t numSteps, size_t iterations); 00209 void interpolateVertexData(void* lockedBuffer, size_t leftIndex, size_t rightIndex, size_t destIndex); 00210 void makeTriangles(void); 00211 00212 size_t getAutoULevel(bool forMax = false); 00213 size_t getAutoVLevel(bool forMax = false); 00214 00215 HardwareVertexBufferSharedPtr mVertexBuffer; 00216 HardwareIndexBufferSharedPtr mIndexBuffer; 00217 size_t mVertexOffset; 00218 size_t mIndexOffset; 00219 size_t mRequiredVertexCount; 00220 size_t mRequiredIndexCount; 00221 size_t mCurrIndexCount; 00222 00223 AxisAlignedBox mAABB; 00224 Real mBoundingSphere; 00225 00226 00227 00228 }; 00229 00230 00231 } // namespace 00232 00233 #endif
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Last modified Sun Sep 27 22:02:24 2009