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00001 
00007 /* Copyright, 2000 Nevrax Ltd.
00008  *
00009  * This file is part of NEVRAX NEL.
00010  * NEVRAX NEL is free software; you can redistribute it and/or modify
00011  * it under the terms of the GNU General Public License as published by
00012  * the Free Software Foundation; either version 2, or (at your option)
00013  * any later version.
00014 
00015  * NEVRAX NEL is distributed in the hope that it will be useful, but
00016  * WITHOUT ANY WARRANTY; without even the implied warranty of
00017  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
00018  * General Public License for more details.
00019 
00020  * You should have received a copy of the GNU General Public License
00021  * along with NEVRAX NEL; see the file COPYING. If not, write to the
00022  * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
00023  * MA 02111-1307, USA.
00024  */
00025 
00026 #include "driver_opengl.h"
00027 
00028 namespace NL3D {
00029 
00030 void CDriverGL::setFrustum(float left, float right, float bottom, float top, float znear, float zfar, bool perspective)
00031 {
00032         glMatrixMode(GL_PROJECTION);
00033         glLoadIdentity();
00034         if (perspective)
00035         {
00036                 glFrustum(left,right,bottom,top,znear,zfar);
00037         }
00038         else
00039         {
00040                 glOrtho(left,right,bottom,top,znear,zfar);
00041         }
00042         glMatrixMode(GL_MODELVIEW);
00043 }
00044 
00045 // --------------------------------------------------
00046 
00047 void CDriverGL::setupViewMatrix(const CMatrix& mtx)
00048 {
00049         // Setup the matrix to transform the CScene basis in openGL basis.
00050         CMatrix         changeBasis;
00051         CVector         I(1,0,0);
00052         CVector         J(0,0,-1);
00053         CVector         K(0,1,0);
00054 
00055         changeBasis.identity();
00056         changeBasis.setRot(I,J,K, true);
00057         // Optimize it...
00058         changeBasis*= mtx;
00059         _ViewMtx=changeBasis;
00060 
00061         _MatrixSetupDirty= true;
00062         _ViewMatrixSetupDirty= true;
00063 }
00064 
00065 CMatrix CDriverGL::getViewMatrix(void) const
00066 {
00067         // Setup the matrix to transform the CScene basis in openGL basis.
00068         CMatrix         changeBasis;
00069         CVector         I(1,0,0);
00070         CVector         J(0,0,1);
00071         CVector         K(0,-1,0);
00072 
00073         changeBasis.identity();
00074         changeBasis.setRot(I,J,K, true);
00075         return(changeBasis*_ViewMtx);
00076 }
00077 
00078 void CDriverGL::setupModelMatrix(const CMatrix& mtx, uint8 n)
00079 {
00080         // Check args
00081         nlassert (n<IDriver::MaxModelMatrix);
00082 
00083 
00084         // Dirt flags.
00085         _MatrixSetupDirty= true;
00086         // because we don't know for which (skin/normal/paletteSkin) mode this will be used, we must set the 2 flags.
00087         _ModelViewMatrixDirty.set(n);
00088         _ModelViewMatrixDirtyPaletteSkin.set(n);
00089 
00090 
00091         // Put the matrix in the opengl world, and store it.
00092         _ModelViewMatrix[n]= _ViewMtx*mtx;
00093 }
00094 
00095 
00096 
00097 // ***************************************************************************
00098 void    CDriverGL::CMatrix3x4::set(const CMatrix &mat)
00099 {
00100         const float     *m =mat.get();
00101         a11= m[0]; a12= m[4]; a13= m[8] ; a14= m[12]; 
00102         a21= m[1]; a22= m[5]; a23= m[9] ; a24= m[13]; 
00103         a31= m[2]; a32= m[6]; a33= m[10]; a34= m[14]; 
00104 }
00105 
00106 
00107 } // NL3D
driver_opengl_matrix.cpp
