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# OgrePatchSurface.h

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    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 © 2000-2002 The OGRE Team
    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 */
    00025 #ifndef __PatchSurface_H__
    00026 #define __PatchSurface_H__
    00027
    00028 #include "OgrePrerequisites.h"
    00029
    00030 #include "OgreVector3.h"
    00031 #include "OgreString.h"
    00032 #include "OgreRenderOperation.h"
    00033 #include "OgreAxisAlignedBox.h"
    00034
    00035 namespace Ogre {
    00036
    00043     class _OgreExport PatchSurface
    00044     {
    00045     public:
    00046         PatchSurface();
    00047         ~PatchSurface();
    00048
    00049         enum PatchSurfaceType
    00050         {
    00052             PST_BEZIER
    00053         };
    00054
    00056         enum
    00057         {
    00058             AUTO_LEVEL = -1
    00059         };
    00060
    00061         enum VisibleSide {
    00063             VS_FRONT,
    00065             VS_BACK,
    00067             VS_BOTH
    00068         };
    00096         void defineSurface(void* controlPointBuffer,
    00097             VertexDeclaration *declaration, size_t width, size_t height,
    00098             PatchSurfaceType pType = PST_BEZIER,
    00099             size_t uMaxSubdivisionLevel = AUTO_LEVEL, size_t vMaxSubdivisionLevel = AUTO_LEVEL,
    00100             VisibleSide visibleSide = VS_FRONT);
    00101
    00107         size_t getRequiredVertexCount(void) const;
    00113         size_t getRequiredIndexCount(void) const;
    00114
    00116         size_t getCurrentIndexCount(void) const;
    00118         size_t getIndexOffset(void) const { return mIndexOffset; }
    00120         size_t getVertexOffset(void) const { return mVertexOffset; }
    00121
    00122
    00124         const AxisAlignedBox& getBounds(void) const;
    00127         Real getBoundingSphereRadius(void) const;
    00143         void build(HardwareVertexBufferSharedPtr destVertexBuffer, size_t vertexStart,
    00144             HardwareIndexBufferSharedPtr destIndexBuffer, size_t indexStart);
    00145
    00154         void setSubdivisionFactor(Real factor);
    00155
    00157         Real getSubdivisionFactor(void) const;
    00158
    00159         void* getControlPointBuffer(void) const
    00160         {
    00161             return mControlPointBuffer;
    00162         }
    00165         void notifyControlPointBufferDeallocated(void) {
    00166             mControlPointBuffer = 0;
    00167         }
    00168     protected:
    00170         VertexDeclaration* mDeclaration;
    00172         void* mControlPointBuffer;
    00174         PatchSurfaceType mType;
    00176         size_t mCtlWidth;
    00178         size_t mCtlHeight;
    00180         size_t mCtlCount;
    00182         size_t mULevel;
    00184         size_t mVLevel;
    00186         size_t mMaxULevel;
    00187         size_t mMaxVLevel;
    00189         size_t mMeshWidth;
    00191         size_t mMeshHeight;
    00193         VisibleSide mVSide;
    00194
    00195         Real mSubdivisionFactor;
    00196
    00197         std::vector<Vector3> mVecCtlPoints;
    00198
    00201         size_t findLevel( Vector3& a, Vector3& b, Vector3& c);
    00202
    00203         void distributeControlPoints(void* lockedBuffer);
    00204         void subdivideCurve(void* lockedBuffer, size_t startIdx, size_t stepSize, size_t numSteps, size_t iterations);
    00205         void interpolateVertexData(void* lockedBuffer, size_t leftIndex, size_t rightIndex, size_t destIndex);
    00206         void makeTriangles(void);
    00207
    00208         size_t getAutoULevel(bool forMax = false);
    00209         size_t getAutoVLevel(bool forMax = false);
    00210
    00211         HardwareVertexBufferSharedPtr mVertexBuffer;
    00212         HardwareIndexBufferSharedPtr mIndexBuffer;
    00213         size_t mVertexOffset;
    00214         size_t mIndexOffset;
    00215         size_t mRequiredVertexCount;
    00216         size_t mRequiredIndexCount;
    00217         size_t mCurrIndexCount;
    00218
    00219         AxisAlignedBox mAABB;
    00220         Real mBoundingSphere;
    00221
    00222
    00223
    00224     };
    00225
    00226
    00227 } // namespace
    00228
    00229 #endif

Copyright © 2002-2003 by The OGRE Team
Last modified Sun Nov 28 19:48:39 2004