Primitive.cpp
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00001 /*
00002  This file is part of the VRender library.
00003  Copyright (C) 2005 Cyril Soler (Cyril.Soler@imag.fr)
00004  Version 1.0.0, released on June 27, 2005.
00005 
00006  http://artis.imag.fr/Members/Cyril.Soler/VRender
00007 
00008  VRender is free software; you can redistribute it and/or modify
00009  it under the terms of the GNU General Public License as published by
00010  the Free Software Foundation; either version 2 of the License, or
00011  (at your option) any later version.
00012 
00013  VRender is distributed in the hope that it will be useful,
00014  but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016  GNU General Public License for more details.
00017 
00018  You should have received a copy of the GNU General Public License
00019  along with VRender; if not, write to the Free Software Foundation, Inc.,
00020  51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
00021 */
00022 
00023 /****************************************************************************
00024 
00025  Copyright (C) 2002-2013 Gilles Debunne. All rights reserved.
00026 
00027  This file is part of the QGLViewer library version 2.4.0.
00028 
00029  http://www.libqglviewer.com - contact@libqglviewer.com
00030 
00031  This file may be used under the terms of the GNU General Public License 
00032  versions 2.0 or 3.0 as published by the Free Software Foundation and
00033  appearing in the LICENSE file included in the packaging of this file.
00034  In addition, as a special exception, Gilles Debunne gives you certain 
00035  additional rights, described in the file GPL_EXCEPTION in this package.
00036 
00037  libQGLViewer uses dual licensing. Commercial/proprietary software must
00038  purchase a libQGLViewer Commercial License.
00039 
00040  This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00041  WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00042 
00043 *****************************************************************************/
00044 
00045 #include <math.h>
00046 #include <assert.h>
00047 #include "Primitive.h"
00048 #include "Types.h"
00049 
00050 using namespace vrender ;
00051 using namespace std ;
00052 
00053 Point::Point(const Feedback3DColor& f)
00054         : _position_and_color(f)
00055 {
00056 }
00057 
00058 const Vector3& Point::vertex(int) const
00059 {
00060         return _position_and_color.pos() ;
00061 }
00062 
00063 const Feedback3DColor& Point::sommet3DColor(int) const
00064 {
00065         return _position_and_color ;
00066 }
00067 
00068 const Feedback3DColor& Segment::sommet3DColor(int i) const
00069 {
00070         return ( (i&1)==0 )?P1:P2 ;
00071 }
00072 
00073 AxisAlignedBox_xyz Point::bbox() const
00074 {
00075         return AxisAlignedBox_xyz(_position_and_color.pos(),_position_and_color.pos()) ;
00076 }
00077 
00078 const Vector3& Segment::vertex(int i) const
00079 {
00080         return ( (i&1)==0 )?P1.pos():P2.pos() ;
00081 }
00082 
00083 AxisAlignedBox_xyz Segment::bbox() const
00084 {
00085         AxisAlignedBox_xyz B(P1.pos());
00086         B.include(P2.pos()) ;
00087 
00088         return B ;
00089 }
00090 
00091 const Feedback3DColor& Polygone::sommet3DColor(int i) const
00092 {
00093         return _vertices[i % nbVertices()] ;
00094 }
00095 
00096 const Vector3& Polygone::vertex(int i) const
00097 {
00098         return _vertices[i % nbVertices()].pos() ;
00099 }
00100 
00101 
00102 Polygone::Polygone(const vector<Feedback3DColor>& fc)
00103         : _vertices(fc)
00104 {
00105         initNormal() ;
00106 
00107         for(unsigned int i=0;i<fc.size();i++)
00108                 _bbox.include(fc[i].pos()) ;
00109 }
00110 
00111 AxisAlignedBox_xyz Polygone::bbox() const
00112 {
00113         return _bbox ;
00114 }
00115 
00116 double Polygone::equation(const Vector3& v) const
00117 {
00118         return v * _normal - _c ;
00119 }
00120 
00121 void Polygone::initNormal()
00122 {
00123         FLOAT anglemax = 0.0 ;
00124         Vector3 normalmax = Vector3(0.0,0.0,0.0) ;
00125         FLOAT v12norm = (vertex(1)-vertex(0)).norm() ;
00126 
00127         for(unsigned int i=0;i<nbVertices();i++)
00128         {
00129                 Vector3 v1(vertex(i)) ;
00130                 Vector3 v2(vertex(i+1));
00131                 Vector3 v3(vertex(i+2)) ;
00132 
00133                 Vector3 normal_tmp((v3-v2)^(v1-v2)) ;
00134 
00135                 FLOAT v32norm = (v3-v2).norm() ;
00136 
00137                 if(normal_tmp.z() > 0)
00138                         normal_tmp *= -1.0 ;
00139 
00140                 if((v32norm > 0.0)&&(v12norm > 0.0))
00141                 {
00142                         double anglemaxtmp = normal_tmp.norm()/v32norm/v12norm ;
00143 
00144                         if(anglemaxtmp > anglemax)
00145                         {
00146                                 anglemax = anglemaxtmp ;
00147                                 normalmax = normal_tmp ;
00148                         }
00149                 }
00150 
00151                 v12norm = v32norm ;
00152 
00153                 if(anglemax > FLAT_POLYGON_EPS) // slight optimization
00154                         break ;
00155         }
00156 
00157         if(normalmax.infNorm() != 0.0)
00158                 _normal = NVector3(normalmax) ;
00159 
00160         anglefactor = anglemax ;
00161         _c = _normal*vertex(0) ;
00162 }
00163 
00164 std::ostream& vrender::operator<<(std::ostream& o,const Feedback3DColor& f)
00165 {
00166         o << "(" << f.pos() << ") + (" << f.red() << "," << f.green() << "," << f.blue() << "," << f.alpha() << ")" << endl ;
00167         return o ;
00168 }
00169 
00170 


octovis
Author(s): Kai M. Wurm , Armin Hornung
autogenerated on Thu Jun 6 2019 17:31:58