OSGOrthographicCamera.cpp
Go to the documentation of this file.00001 /*---------------------------------------------------------------------------*\ 00002 * OpenSG * 00003 * * 00004 * * 00005 * Copyright (C) 2000-2002 by the OpenSG Forum * 00006 * * 00007 * www.opensg.org * 00008 * * 00009 * contact: dirk@opensg.org, gerrit.voss@vossg.org, jbehr@zgdv.de * 00010 * * 00011 \*---------------------------------------------------------------------------*/ 00012 /*---------------------------------------------------------------------------*\ 00013 * License * 00014 * * 00015 * This library is free software; you can redistribute it and/or modify it * 00016 * under the terms of the GNU Library General Public License as published * 00017 * by the Free Software Foundation, version 2. * 00018 * * 00019 * This library is distributed in the hope that it will be useful, but * 00020 * WITHOUT ANY WARRANTY; without even the implied warranty of * 00021 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * 00022 * Library General Public License for more details. * 00023 * * 00024 * You should have received a copy of the GNU Library General Public * 00025 * License along with this library; if not, write to the Free Software * 00026 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * 00027 * * 00028 \*---------------------------------------------------------------------------*/ 00029 /*---------------------------------------------------------------------------*\ 00030 * Changes * 00031 * * 00032 * * 00033 * * 00034 * * 00035 * * 00036 * * 00037 \*---------------------------------------------------------------------------*/ 00038 00039 //--------------------------------------------------------------------------- 00040 // Includes 00041 //--------------------------------------------------------------------------- 00042 00043 #include <stdlib.h> 00044 #include <stdio.h> 00045 00046 #include "OSGConfig.h" 00047 #include "OSGMatrixUtility.h" 00048 00049 #include "OSGOrthographicCamera.h" 00050 00051 OSG_USING_NAMESPACE 00052 00053 /***************************************************************************\ 00054 * Description * 00055 \***************************************************************************/ 00056 00061 /***************************************************************************\ 00062 * Class variables * 00063 \***************************************************************************/ 00064 00065 /***************************************************************************\ 00066 * Class methods * 00067 \***************************************************************************/ 00068 00069 void OrthographicCamera::initMethod(InitPhase ePhase) 00070 { 00071 Inherited::initMethod(ePhase); 00072 } 00073 00074 00075 /***************************************************************************\ 00076 * Instance methods * 00077 \***************************************************************************/ 00078 00079 /*-------------------------------------------------------------------------*\ 00080 - private - 00081 \*-------------------------------------------------------------------------*/ 00082 00083 /*----------------------- constructors & destructors ----------------------*/ 00084 00085 OrthographicCamera::OrthographicCamera(void) : 00086 Inherited() 00087 { 00088 } 00089 00090 OrthographicCamera::OrthographicCamera(const OrthographicCamera &source) : 00091 Inherited(source) 00092 { 00093 } 00094 00095 OrthographicCamera::~OrthographicCamera(void) 00096 { 00097 } 00098 00099 /*----------------------------- class specific ----------------------------*/ 00100 00101 void OrthographicCamera::changed(ConstFieldMaskArg whichField, 00102 UInt32 origin, 00103 BitVector details) 00104 { 00105 Inherited::changed(whichField, origin, details); 00106 } 00107 00108 /*-------------------------- your_category---------------------------------*/ 00109 00110 void OrthographicCamera::getProjection(Matrixr &result, 00111 UInt32 width, 00112 UInt32 height) 00113 { 00114 Real32 vs = getVerticalSize () / 2; 00115 Real32 hs = getHorizontalSize() / 2; 00116 00117 // catch some illegal cases 00118 if(((vs <= 0) && (hs <= 0)) || width == 0 || height == 0) 00119 { 00120 result.setIdentity(); 00121 return; 00122 } 00123 00124 Real32 winAspect = width / Real32(height) * getAspect(); 00125 if (vs <= 0) 00126 { 00127 vs = hs / winAspect; 00128 } 00129 else if (hs <= 0) 00130 { 00131 hs = vs * winAspect; 00132 } 00133 else 00134 { 00135 Real32 camAspect = hs / vs; 00136 00137 if (winAspect < camAspect) 00138 { 00139 vs = hs / winAspect; 00140 } 00141 else 00142 { 00143 hs = vs * winAspect; 00144 } 00145 } 00146 00147 MatrixOrthogonal(result, -hs, hs, 00148 -vs, vs, 00149 getNear(), getFar()); 00150 } 00151 00152 00153 void OrthographicCamera::dump( UInt32 , 00154 const BitVector ) const 00155 { 00156 SLOG << "Dump OrthographicCamera NI" << std::endl; 00157 } 00158 00159
