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LibN2L


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(libN2L-4)


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LibN2L-4 Library Code Reference

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renderObjects

cRLODMesh.cpp

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00001 /************************************************************************
00002 Nova-2 Library (libN2L, or simply n2l) Game development C++ Library
00003 Copyright (C) 2002  Aaron Cameron
00004 
00005 This library is free software; you can redistribute it and/or
00006 modify it under the terms of the GNU Lesser General Public
00007 License as published by the Free Software Foundation; either
00008 version 2.1 of the License, or (at your option) any later version.
00009 
00010 This library is distributed in the hope that it will be useful,
00011 but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013 Lesser General Public License for more details.
00014 
00015 You should have received a copy of the GNU Lesser General Public
00016 License along with this library; if not, write to the Free Software
00017 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
00018 
00019 A copy of the GNU Lesser General Public License has been provided with
00020 this library in the file 'COPYING'.
00021 
00022 Contact information for the author of this library has been provided
00023 with this library in the file 'AUTHOR'.
00024 ************************************************************************/
00025 #include "cRLODMesh.h"
00026 
00027 #include "cRVisualTriMesh.h"
00028 
00029 namespace n2l
00030 {
00031 
00032     /****************************************************************/
00033     void cRLODMesh::addLowerMesh(
00034         const cAutoPtr<const cRVisualTriMesh> &iMesh )
00035     {
00036         mMeshes.push_back(iMesh);
00037     }
00038 
00039 
00040     /****************************************************************/
00041     void cRLODMesh::render( const tFloat &iDistance,
00042         const cAutoPtr<const cGLTexture> &i_iTexture,
00043         const tRenderOptions iOptions) const
00044     {
00045         if (mMeshes.empty()) return;
00046         mMeshes[getLOD(iDistance)]->render( i_iTexture, iOptions );
00047     }
00048 
00049     /****************************************************************/
00050     void cRLODMesh::render( const tFloat &iDistance,
00051         const cGLTexture &iTexture ) const
00052     {
00053         if (mMeshes.empty()) return;
00054         mMeshes[getLOD(iDistance)]->render( iTexture );
00055     }
00056 
00057     /****************************************************************/
00058     const cAutoPtr<const cRVisualTriMesh> cRLODMesh::highestMesh() const
00059     {
00060         if (mMeshes.empty()) return 0;
00061         return mMeshes[0];
00062     }
00063 
00064     /****************************************************************/
00065     const tUint cRLODMesh::getLOD( const tFloat &iDistance ) const
00066     {
00067         if (iDistance<=0.0f || mMeshes.size()==1)
00068             return 0;
00069 
00070         else if (iDistance>=1.0f)
00071             return mMeshes.size()-1;
00072 
00073 
00074         // This should have a more intelligent selection, which should
00075         // be configurable.
00076         // We'll start out with a linear scale for now.
00077         return tUint(mMeshes.size()*iDistance);
00078     }
00079 
00080 } // namespace
©2012 Aaron Cameron