00001 /* 00002 ----------------------------------------------------------------------------- 00003 This source file is part of OGRE 00004 (Object-oriented Graphics Rendering Engine) 00005 For the latest info, see http://www.ogre3d.org/ 00006 00007 Copyright © 2000-2004 The OGRE Team 00008 Also see acknowledgements in Readme.html 00009 00010 This program is free software; you can redistribute it and/or modify it under 00011 the terms of the GNU Lesser General Public License as published by the Free Software 00012 Foundation; either version 2 of the License, or (at your option) any later 00013 version. 00014 00015 This program is distributed in the hope that it will be useful, but WITHOUT 00016 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 00017 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. 00018 00019 You should have received a copy of the GNU Lesser General Public License along with 00020 this program; if not, write to the Free Software Foundation, Inc., 59 Temple 00021 Place - Suite 330, Boston, MA 02111-1307, USA, or go to 00022 http://www.gnu.org/copyleft/lesser.txt. 00023 ----------------------------------------------------------------------------- 00024 */ 00025 #include "OgreTerrainPage.h" 00026 #include "OgreTerrainRenderable.h" 00027 00028 namespace Ogre { 00029 00030 //------------------------------------------------------------------------- 00031 TerrainPage::TerrainPage(unsigned short numTiles) 00032 { 00033 tilesPerPage = numTiles; 00034 // Set up an empty array of TerrainRenderable pointers 00035 int i, j; 00036 for ( i = 0; i < tilesPerPage; i++ ) 00037 { 00038 tiles.push_back( TerrainRow() ); 00039 00040 for ( j = 0; j < tilesPerPage; j++ ) 00041 { 00042 tiles[ i ].push_back( 0 ); 00043 } 00044 } 00045 00046 pageSceneNode = 0; 00047 00048 } 00049 //------------------------------------------------------------------------- 00050 TerrainPage::~TerrainPage() 00051 { 00052 Terrain2D::iterator i, iend; 00053 iend = tiles.end(); 00054 for (i = tiles.begin(); i != iend; ++i) 00055 { 00056 TerrainRow::iterator j, jend; 00057 jend = i->end(); 00058 for (j = i->begin(); j != jend; ++j) 00059 { 00060 delete *j; 00061 *j = 0; 00062 } 00063 } 00064 00065 } 00066 //------------------------------------------------------------------------- 00067 void TerrainPage::linkNeighbours(void) 00068 { 00069 //setup the neighbor links. 00070 00071 for ( size_t j = 0; j < tilesPerPage; j++ ) 00072 { 00073 for ( size_t i = 0; i < tilesPerPage; i++ ) 00074 { 00075 if ( j != tilesPerPage - 1 ) 00076 { 00077 tiles[ i ][ j ] -> _setNeighbor( TerrainRenderable::SOUTH, tiles[ i ][ j + 1 ] ); 00078 tiles[ i ][ j + 1 ] -> _setNeighbor( TerrainRenderable::NORTH, tiles[ i ][ j ] ); 00079 } 00080 00081 if ( i != tilesPerPage - 1 ) 00082 { 00083 tiles[ i ][ j ] -> _setNeighbor( TerrainRenderable::EAST, tiles[ i + 1 ][ j ] ); 00084 tiles[ i + 1 ][ j ] -> _setNeighbor( TerrainRenderable::WEST, tiles[ i ][ j ] ); 00085 } 00086 00087 } 00088 } 00089 } 00090 //------------------------------------------------------------------------- 00091 TerrainRenderable * TerrainPage::getTerrainTile( const Vector3 & pt ) 00092 { 00093 /* Since we don't know if the terrain is square, or has holes, we use a line trace 00094 to find the containing tile... 00095 */ 00096 00097 TerrainRenderable * tile = tiles[ 0 ][ 0 ]; 00098 00099 while ( tile != 0 ) 00100 { 00101 AxisAlignedBox b = tile -> getBoundingBox(); 00102 const Vector3 *corners = b.getAllCorners(); 00103 00104 if ( pt.x < corners[ 0 ].x ) 00105 tile = tile -> _getNeighbor( TerrainRenderable::WEST ); 00106 else if ( pt.x > corners[ 4 ].x ) 00107 tile = tile -> _getNeighbor( TerrainRenderable::EAST ); 00108 else if ( pt.z < corners[ 0 ].z ) 00109 tile = tile -> _getNeighbor( TerrainRenderable::NORTH ); 00110 else if ( pt.z > corners[ 4 ].z ) 00111 tile = tile -> _getNeighbor( TerrainRenderable::SOUTH ); 00112 else 00113 return tile; 00114 } 00115 00116 return 0; 00117 } 00118 00119 } 00120
Copyright © 2002-2003 by The OGRE Team
Last modified Sun Nov 28 19:48:48 2004