# 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 (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 __PatchSurface_H__
    00029 #define __PatchSurface_H__
    00030
    00031 #include "OgrePrerequisites.h"
    00032
    00033 #include "OgreVector3.h"
    00034 #include "OgreString.h"
    00035 #include "OgreRenderOperation.h"
    00036 #include "OgreAxisAlignedBox.h"
    00037
    00038 namespace Ogre {
    00039
    00052     class _OgreExport PatchSurface : public PatchAlloc
    00053     {
    00054     public:
    00055         PatchSurface();
    00056         ~PatchSurface();
    00057
    00058         enum PatchSurfaceType
    00059         {
    00061             PST_BEZIER
    00062         };
    00063
    00065         enum
    00066         {
    00067             AUTO_LEVEL = -1
    00068         };
    00069
    00070         enum VisibleSide {
    00072             VS_FRONT,
    00074             VS_BACK,
    00076             VS_BOTH
    00077         };
    00105         void defineSurface(void* controlPointBuffer,
    00106             VertexDeclaration *declaration, size_t width, size_t height,
    00107             PatchSurfaceType pType = PST_BEZIER,
    00108             size_t uMaxSubdivisionLevel = AUTO_LEVEL, size_t vMaxSubdivisionLevel = AUTO_LEVEL,
    00109             VisibleSide visibleSide = VS_FRONT);
    00110
    00116         size_t getRequiredVertexCount(void) const;
    00122         size_t getRequiredIndexCount(void) const;
    00123
    00125         size_t getCurrentIndexCount(void) const;
    00127         size_t getIndexOffset(void) const { return mIndexOffset; }
    00129         size_t getVertexOffset(void) const { return mVertexOffset; }
    00130
    00131
    00133         const AxisAlignedBox& getBounds(void) const;
    00136         Real getBoundingSphereRadius(void) const;
    00152         void build(HardwareVertexBufferSharedPtr destVertexBuffer, size_t vertexStart,
    00153             HardwareIndexBufferSharedPtr destIndexBuffer, size_t indexStart);
    00154
    00163         void setSubdivisionFactor(Real factor);
    00164
    00166         Real getSubdivisionFactor(void) const;
    00167
    00168         void* getControlPointBuffer(void) const
    00169         {
    00170             return mControlPointBuffer;
    00171         }
    00174         void notifyControlPointBufferDeallocated(void) {
    00175             mControlPointBuffer = 0;
    00176         }
    00177     protected:
    00179         VertexDeclaration* mDeclaration;
    00181         void* mControlPointBuffer;
    00183         PatchSurfaceType mType;
    00185         size_t mCtlWidth;
    00187         size_t mCtlHeight;
    00189         size_t mCtlCount;
    00191         size_t mULevel;
    00193         size_t mVLevel;
    00195         size_t mMaxULevel;
    00196         size_t mMaxVLevel;
    00198         size_t mMeshWidth;
    00200         size_t mMeshHeight;
    00202         VisibleSide mVSide;
    00203
    00204         Real mSubdivisionFactor;
    00205
    00206         vector<Vector3>::type mVecCtlPoints;
    00207
    00210         size_t findLevel( Vector3& a, Vector3& b, Vector3& c);
    00211
    00212         void distributeControlPoints(void* lockedBuffer);
    00213         void subdivideCurve(void* lockedBuffer, size_t startIdx, size_t stepSize, size_t numSteps, size_t iterations);
    00214         void interpolateVertexData(void* lockedBuffer, size_t leftIndex, size_t rightIndex, size_t destIndex);
    00215         void makeTriangles(void);
    00216
    00217         size_t getAutoULevel(bool forMax = false);
    00218         size_t getAutoVLevel(bool forMax = false);
    00219
    00220         HardwareVertexBufferSharedPtr mVertexBuffer;
    00221         HardwareIndexBufferSharedPtr mIndexBuffer;
    00222         size_t mVertexOffset;
    00223         size_t mIndexOffset;
    00224         size_t mRequiredVertexCount;
    00225         size_t mRequiredIndexCount;
    00226         size_t mCurrIndexCount;
    00227
    00228         AxisAlignedBox mAABB;
    00229         Real mBoundingSphere;
    00230
    00231
    00232
    00233     };
    00234
    00238 } // namespace
    00239
    00240 #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