src/common/3dsparse/MeshLODTri.cpp

   1 ////////////////////////////////////////////////////////////////////////////////
   2 //    Scorched3D (c) 2000-2009
   3 //
   4 //    This file is part of Scorched3D.
   5 //
   6 //    Scorched3D is free software; you can redistribute it and/or modify
   7 //    it under the terms of the GNU General Public License as published by
   8 //    the Free Software Foundation; either version 2 of the License, or
   9 //    (at your option) any later version.
  10 //
  11 //    Scorched3D is distributed in the hope that it will be useful,
  12 //    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 //    GNU General Public License for more details.
  15 //
  16 //    You should have received a copy of the GNU General Public License
  17 //    along with Scorched3D; if not, write to the Free Software
  18 //    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19 ////////////////////////////////////////////////////////////////////////////////
  20
  21
  22 // MeshLODTri.cpp: implementation of the MeshLODTri class.
  23 //
  24 //////////////////////////////////////////////////////////////////////
  25
  26 #include <common/Defines.h>
  27 #include <3dsparse/MeshLODVector.h>
  28 #include <3dsparse/MeshLODTri.h>
  29
  30 //////////////////////////////////////////////////////////////////////
  31 // Construction/Destruction
  32 //////////////////////////////////////////////////////////////////////
  33
  34 MeshLODTri::MeshLODTri(MeshLODVector *v0,MeshLODVector *v1,MeshLODVector *v2)
  35 {
  36         vertex[0]=v0;
  37         vertex[1]=v1;
  38         vertex[2]=v2;
  39
  40         //DIALOG_ASSERT(vertex[0]!=vertex[1] && vertex[0]!=vertex[2] && vertex[1]!=vertex[2]);
  41
  42         for(int i=0;i<3;i++)
  43         {
  44                 vertex[i]->face.push_back(this);
  45                 for(int j=0;j<3;j++)
  46                 {
  47                         vertex[i]->addNeighbour(vertex[j]);
  48                 }
  49         }
  50
  51         computeNormal();
  52 }
  53
  54 MeshLODTri::~MeshLODTri()
  55 {
  56         int i;
  57         for(i=0;i<3;i++)
  58         {
  59                 vertex[i]->removeFace(this);
  60         }
  61
  62         for(i=0;i<3;i++)
  63         {
  64                 int i2 = (i+1)%3;
  65                 vertex[i ]->removeIfNonNeighbor(vertex[i2]);
  66                 vertex[i2]->removeIfNonNeighbor(vertex[i ]);
  67         }
  68
  69         for (i=0;i<3;i++)
  70         {
  71                 vertex[i] = 0;
  72         }
  73 }
  74
  75 void MeshLODTri::computeNormal()
  76 {
  77         normal = ((*vertex[1] - *vertex[0]) * (*vertex[2] - *vertex[1])).Normalize();
  78 }
  79
  80 bool MeshLODTri::hasVertex(MeshLODVector *v)
  81 {
  82         return (v==vertex[0] || v==vertex[1] || v==vertex[2]);
  83 }
  84
  85 void MeshLODTri::replaceVertex(MeshLODVector *vold, MeshLODVector *vnew)
  86 {
  87         DIALOG_ASSERT(vold && vnew);
  88         DIALOG_ASSERT(vold==vertex[0] || vold==vertex[1] || vold==vertex[2]);
  89         //DIALOG_ASSERT(vnew!=vertex[0] && vnew!=vertex[1] && vnew!=vertex[2]);
  90
  91         if(vold==vertex[0])
  92         {
  93                 vertex[0]=vnew;
  94         }
  95         else if(vold==vertex[1])
  96         {
  97                 vertex[1]=vnew;
  98         }
  99         else
 100         {
 101                 DIALOG_ASSERT(vold==vertex[2]);
 102                 vertex[2]=vnew;
 103         }
 104
 105         vold->removeFace(this);
 106         vnew->face.push_back(this);
 107
 108         int i;
 109         for(i=0;i<3;i++)
 110         {
 111                 vold->removeIfNonNeighbor(vertex[i]);
 112                 vertex[i]->removeIfNonNeighbor(vold);
 113         }
 114
 115         for(i=0;i<3;i++)
 116         {
 117                 for(int j=0;j<3;j++)
 118                 {
 119                         vertex[i]->addNeighbour(vertex[j]);
 120                 }
 121         }
 122
 123         computeNormal();
 124 }