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Documentation                       Search   driver_opengl_matrix.cpp Go to the documentation of this file. /* Copyright, 2000 Nevrax Ltd. * * This file is part of NEVRAX NEL. * NEVRAX NEL is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * NEVRAX NEL is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * You should have received a copy of the GNU General Public License * along with NEVRAX NEL; see the file COPYING. If not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, * MA 02111-1307, USA. */ #include "stdopengl.h" namespace NL3D { // *************************************************************************** void CDriverGL::setFrustum(float left, float right, float bottom, float top, float znear, float zfar, bool perspective) { glMatrixMode(GL_PROJECTION); glLoadIdentity(); if (perspective) { glFrustum(left,right,bottom,top,znear,zfar); } else { glOrtho(left,right,bottom,top,znear,zfar); } // Backup znear and zfar for zbias setup _OODeltaZ = 1 / (zfar - znear); glMatrixMode(GL_MODELVIEW); } // *************************************************************************** void CDriverGL::setupViewMatrixEx(const CMatrix& mtx, const CVector &cameraPos) { _UserViewMtx= mtx; // Setup the matrix to transform the CScene basis in openGL basis. CMatrix changeBasis; CVector I(1,0,0); CVector J(0,0,-1); CVector K(0,1,0); changeBasis.identity(); changeBasis.setRot(I,J,K, true); _ViewMtx=changeBasis*mtx; // Reset the viewMtx position. _ViewMtx.setPos(CVector::Null); _PZBCameraPos= cameraPos; // Anything that depend on the view martix must be updated. _LightSetupDirty= true; _ModelViewMatrixDirty= true; _RenderSetupDirty= true; _TexMtx = _ViewMtx; _TexMtx.setPos(CVector(0.0f,0.0f,0.0f)); _TexMtx.invert(); _TexMtx = changeBasis * _TexMtx; } // *************************************************************************** void CDriverGL::setupViewMatrix(const CMatrix& mtx) { _UserViewMtx= mtx; // Setup the matrix to transform the CScene basis in openGL basis. CMatrix changeBasis; CVector I(1,0,0); CVector J(0,0,-1); CVector K(0,1,0); changeBasis.identity(); changeBasis.setRot(I,J,K, true); _ViewMtx=changeBasis*mtx; // Just set the PZBCameraPos to 0. _PZBCameraPos= CVector::Null; // Anything that depend on the view martix must be updated. _LightSetupDirty= true; _ModelViewMatrixDirty= true; _RenderSetupDirty= true; _TexMtx = _ViewMtx; _TexMtx.setPos(CVector(0.0f,0.0f,0.0f)); _TexMtx.invert(); _TexMtx = changeBasis * _TexMtx; } // *************************************************************************** CMatrix CDriverGL::getViewMatrix(void) const { return _UserViewMtx; } // *************************************************************************** void CDriverGL::setupModelMatrix(const CMatrix& mtx) { // profiling _NbSetupModelMatrixCall++; // Dirt flags. _ModelViewMatrixDirty= true; _RenderSetupDirty= true; // Put the matrix in the opengl eye space, and store it. CMatrix mat= mtx; // remove first the _PZBCameraPos mat.setPos(mtx.getPos() - _PZBCameraPos); _ModelViewMatrix= _ViewMtx*mat; } // *************************************************************************** void CDriverGL::multiplyModelMatrix(const CMatrix& mtx) { // Dirt flags. _ModelViewMatrixDirty= true; _RenderSetupDirty= true; // multiply this modelMatrix with the _ModelViewMatrix. _ModelViewMatrix= _ModelViewMatrix*mtx; } // *************************************************************************** void CDriverGL::doRefreshRenderSetup() { // Check if the light setup has been modified first if (_LightSetupDirty) // Recompute light setup cleanLightSetup (); // Check light setup is good nlassert (_LightSetupDirty==false); // Check if must update the modelViewMatrix if( _ModelViewMatrixDirty ) { // By default, the first model matrix is active glLoadMatrixf( _ModelViewMatrix.get() ); // enable normalize if matrix has scale. enableGlNormalize( _ModelViewMatrix.hasScalePart() || _ForceNormalize ); // clear. _ModelViewMatrixDirty= false; } // render setup is cleaned. _RenderSetupDirty= false; } } // NL3D