Changeset 9421 in orxonox.OLD for branches/terrain/src/lib/graphics/importer/terrain/terrain.cc

Timestamp:

Jul 24, 2006, 1:46:23 PM (18 years ago)

Author:

bensch

Message:

renamings

File:

• branches/terrain/src/lib/graphics/importer/terrain/terrain.cc (modified) (1 diff)

branches/terrain/src/lib/graphics/importer/terrain/terrain.cc

@@ -12 +12 @@
 #endif
 
-bool validateSize( int _s ) {
-        _s-=1;
-        int s = 16;
-        while ( s <= _s ) {
-                if (s == _s )
-                        return true;
-                s*=2;
-        }
-        return false;
+bool validateSize( int _s )
+{
+  _s-=1;
+  int s = 16;
+  while ( s <= _s )
+  {
+    if (s == _s )
+      return true;
+    s*=2;
+  }
+  return false;
 }
 void Terrain::build()
 {
-        ResourceManager *MANAGER = ResourceManager::getInstance();
-        std::string full = MANAGER->getFullName( heightmapSource );
-        SDL_Surface *tmpData = IMG_Load( full.c_str() );
-        if ( !tmpData ) {
-                PRINT(0)( "I' sorry, I can't load %s\n", full.c_str() );
-                return;
-        }               
-        if ( !validateSize( tmpData->h ) || !validateSize( tmpData->w ) ) {
-                PRINT(0)( "The size of the elevation map must be 2^n+1x2^m+1. and at least 17x17" );
-                return;
-        }
-        if ( tmpData->format->BytesPerPixel != 1 ) {
-                PRINT(0)( "The elevetation map must be an 8bit image not %d", 
-                        tmpData->format->BytesPerPixel*8 );
-                return;
-        }
-        PRINTF(2)( "Loaded the elevation map\n" );
-        heightfield.height = tmpData->h;
-        heightfield.width = tmpData->w;
-        heightfield.pitch = tmpData->pitch;
-        int dataSize = heightfield.pitch*heightfield.height;
-        heightfield.data = new Uint8[dataSize];
-        memcpy( heightfield.data, tmpData->pixels, sizeof(Uint8)*dataSize );
-        SDL_FreeSurface( tmpData );
-        pagesX = (heightfield.width/(pageSize-1) );
-        pagesZ = (heightfield.height/(pageSize-1) );
-        
-        
-        pages = new pTerrainPage[pagesX*pagesZ];        
-        for ( int x = 0; x < pagesX; ++x )
-                for ( int z = 0; z < pagesZ; ++z )
-                        pages[z*pagesX+x] = createPage( x, z );
-        //Inform each page about its neighbors.
-        for ( int x = 0; x < pagesX; ++x )
-                for ( int z = 0; z < pagesZ; ++z )
-                        pages[z*pagesX+x]->setNeighbors(
-                                x > 0                   ? getPage( x-1, z+0 ) : NULL,
-                                x < pagesX-1    ? getPage( x+1, z+0 ) : NULL, 
-                                z < pagesZ-1    ? getPage( x+0, z+1 ) : NULL,
-                                z > 0                   ? getPage( x+0, z-1 ) : NULL );
-        
-        root = createQuadTree( 0, 0, pagesX, pagesZ );
-        
-        for ( unsigned int i = 0; i < layers.size(); ++i ) {
-                determineLayerVisibility( i );
-        }       
-        activePages = NULL;
+
+  printf("SHOULD GET LOADED :)\n");
+
+  ResourceManager *MANAGER = ResourceManager::getInstance();
+  std::string full = MANAGER->getFullName( heightmapSource );
+  SDL_Surface *tmpData = IMG_Load( full.c_str() );
+  if ( !tmpData )
+  {
+    PRINT(0)( "I' sorry, I can't load %s\n", full.c_str() );
+    return;
+  }
+  if ( !validateSize( tmpData->h ) || !validateSize( tmpData->w ) )
+  {
+    PRINT(0)( "The size of the elevation map must be 2^n+1x2^m+1. and at least 17x17" );
+    return;
+  }
+  if ( tmpData->format->BytesPerPixel != 1 )
+  {
+    PRINT(0)( "The elevetation map must be an 8bit image not %d",
+              tmpData->format->BytesPerPixel*8 );
+    return;
+  }
+  PRINTF(2)( "Loaded the elevation map\n" );
+  heightfield.height = tmpData->h;
+  heightfield.width = tmpData->w;
+  heightfield.pitch = tmpData->pitch;
+  int dataSize = heightfield.pitch*heightfield.height;
+  heightfield.data = new Uint8[dataSize];
+  memcpy( heightfield.data, tmpData->pixels, sizeof(Uint8)*dataSize );
+  SDL_FreeSurface( tmpData );
+  pagesX = (heightfield.width/(pageSize-1) );
+  pagesZ = (heightfield.height/(pageSize-1) );
+
+
+  pages = new pTerrainPage[pagesX*pagesZ];
+  for ( int x = 0; x < pagesX; ++x )
+    for ( int z = 0; z < pagesZ; ++z )
+      pages[z*pagesX+x] = createPage( x, z );
+  //Inform each page about its neighbors.
+  for ( int x = 0; x < pagesX; ++x )
+    for ( int z = 0; z < pagesZ; ++z )
+      pages[z*pagesX+x]->setNeighbors(
+        x > 0                   ? getPage( x-1, z+0 ) : NULL,
+        x < pagesX-1    ? getPage( x+1, z+0 ) : NULL,
+        z < pagesZ-1    ? getPage( x+0, z+1 ) : NULL,
+        z > 0                   ? getPage( x+0, z-1 ) : NULL );
+
+  root = createQuadTree( 0, 0, pagesX, pagesZ );
+
+  for ( unsigned int i = 0; i < layers.size(); ++i )
+  {
+    determineLayerVisibility( i );
+  }
+  activePages = NULL;
 }
 
 pTerrainQuad Terrain::createQuadTree( int _x0, int _z0, int _x1, int _z1, int _depth )
 {
-        int _x01 = (_x1+_x0)/2; int _z01 = (_z1+_z0)/2;
-        pTerrainQuad node;
-        if ( _x1-_x0 == 1 ) {
-                node = getPage( _x0, _z0 );
-                node->setChildren( NULL, NULL, NULL, NULL );
-        }
-        else {  
-                node = new TerrainQuad( this, _x0, _z0, _x1, _z1 );
-                node->setChildren( 
-                        createQuadTree( _x0, _z0, _x01, _z01, _depth+1 ),
-                        createQuadTree( _x01, _z0, _x1, _z01, _depth+1 ), 
-                        createQuadTree( _x0, _z01, _x01, _z1, _depth+1 ), 
-                        createQuadTree( _x01, _z01, _x1, _z1, _depth+1 ) );
-        }
-        node->calculateBounds();
-        return node;
+  int _x01 = (_x1+_x0)/2; int _z01 = (_z1+_z0)/2;
+  pTerrainQuad node;
+  if ( _x1-_x0 == 1 )
+  {
+    node = getPage( _x0, _z0 );
+    node->setChildren( NULL, NULL, NULL, NULL );
+  }
+  else
+  {
+    node = new TerrainQuad( this, _x0, _z0, _x1, _z1 );
+    node->setChildren(
+      createQuadTree( _x0, _z0, _x01, _z01, _depth+1 ),
+      createQuadTree( _x01, _z0, _x1, _z01, _depth+1 ),
+      createQuadTree( _x0, _z01, _x01, _z1, _depth+1 ),
+      createQuadTree( _x01, _z01, _x1, _z1, _depth+1 ) );
+  }
+  node->calculateBounds();
+  return node;
 }
 
 pTerrainPage Terrain::createPage( int _xOffset, int _zOffset ) const
 {
-        pTerrainPage newPage = new TerrainPage( const_cast<Terrain*>( this ), _xOffset, _zOffset );
-        newPage->setScale( scale );     
-        newPage->setPosition( Vector( scale.x*_xOffset, 0.0f, scale.z*_zOffset ) );
-        newPage->calculateErrors();
-        return newPage;
-}
-
-void Terrain::addLevelFourPage( int _numVertices, Vertex *_vertices, 
-        int _numIndices, unsigned short *_indices )
-{
-        assert( indices ); assert( vertices );
-        BufferInfo bi = buffers[current];       
-        if ( ( MAX_VERTICES < _numVertices+bi.numVertices ) || 
-                ( MAX_INDICES < _numIndices+bi.numIndices+2 ) ) {
-                //So, we need the next vb and ib. Lets put the old into vram...
-                glBindBufferARB( GL_ARRAY_BUFFER_ARB, bi.vbIdentifier );
-                glBufferDataARB( GL_ARRAY_BUFFER_ARB, MAX_VERTICES*sizeof( Vertex ), 
-                        vertices, GL_DYNAMIC_DRAW_ARB );
-                glBindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB, bi.ibIdentifier );
-                glBufferDataARB( GL_ELEMENT_ARRAY_BUFFER_ARB, MAX_INDICES*sizeof( short ), 
-                        indices, GL_DYNAMIC_DRAW_ARB );
-                BufferInfo newInfo;
-                broker->acquire( newInfo.vbIdentifier, newInfo.ibIdentifier );                  
-                current++;      
-                buffers.push_back( newInfo );   
-                bi = newInfo;
-        }
-        //For the vertex data, a simple copy operation is sufficient...
-        memcpy( &vertices[bi.numVertices], _vertices, 
-                _numVertices*sizeof( Vertex ) );
-        //The indices need to be updated with an offset :(
-        unsigned short *dst= &indices[bi.numIndices];
-        unsigned short offset = bi.numVertices;
-        unsigned short *src= _indices;
-        unsigned short *end= src+_numIndices;
-        bi.numVertices+=_numVertices;           
-        if ( bi.numIndices ) {
-                dst[0] = *(dst-1);
-                dst[1] = *src+offset;
-                dst+=2; bi.numIndices+=2;
-        }
-        while ( src < end ) {
-                *dst= *src+offset;
-                dst++;
-                src++;
-        }
-        bi.numIndices+=_numIndices;
-        buffers[current] = bi;
+  pTerrainPage newPage = new TerrainPage( const_cast<Terrain*>( this ), _xOffset, _zOffset );
+  newPage->setScale( scale );
+  newPage->setPosition( Vector( scale.x*_xOffset, 0.0f, scale.z*_zOffset ) );
+  newPage->calculateErrors();
+  return newPage;
+}
+
+void Terrain::addLevelFourPage( int _numVertices, Vertex *_vertices,
+                                int _numIndices, unsigned short *_indices )
+{
+  assert( indices ); assert( vertices );
+  BufferInfo bi = buffers[current];
+  if ( ( MAX_VERTICES < _numVertices+bi.numVertices ) ||
+       ( MAX_INDICES < _numIndices+bi.numIndices+2 ) )
+  {
+    //So, we need the next vb and ib. Lets put the old into vram...
+    glBindBufferARB( GL_ARRAY_BUFFER_ARB, bi.vbIdentifier );
+    glBufferDataARB( GL_ARRAY_BUFFER_ARB, MAX_VERTICES*sizeof( Vertex ),
+                     vertices, GL_DYNAMIC_DRAW_ARB );
+    glBindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB, bi.ibIdentifier );
+    glBufferDataARB( GL_ELEMENT_ARRAY_BUFFER_ARB, MAX_INDICES*sizeof( short ),
+                     indices, GL_DYNAMIC_DRAW_ARB );
+    BufferInfo newInfo;
+    broker->acquire( newInfo.vbIdentifier, newInfo.ibIdentifier );
+    current++;
+    buffers.push_back( newInfo );
+    bi = newInfo;
+  }
+  //For the vertex data, a simple copy operation is sufficient...
+  memcpy( &vertices[bi.numVertices], _vertices,
+          _numVertices*sizeof( Vertex ) );
+  //The indices need to be updated with an offset :(
+  unsigned short *dst= &indices[bi.numIndices];
+  unsigned short offset = bi.numVertices;
+  unsigned short *src= _indices;
+  unsigned short *end= src+_numIndices;
+  bi.numVertices+=_numVertices;
+  if ( bi.numIndices )
+  {
+    dst[0] = *(dst-1);
+    dst[1] = *src+offset;
+    dst+=2; bi.numIndices+=2;
+  }
+  while ( src < end )
+  {
+    *dst= *src+offset;
+    dst++;
+    src++;
+  }
+  bi.numIndices+=_numIndices;
+  buffers[current] = bi;
 }
 
 void Terrain::determineVisiblePages( pTerrainQuad _node )
 {
-        switch( _node->cull() ) {
-                case Frustum::INTERSECT:
-                        if ( !_node->isChildless() ) {
-                                pTerrainQuad *children = _node->getChildren();
-                                for ( int i = 0; i < 4; ++i, ++children )
-                                        determineVisiblePages( *children );
-                        }
-                        else {
-                                showPages( _node->getXOffset(), 
-                                                   _node->getZOffset(), 1, 1 );
-                        }
-                        break;
-                case Frustum::INSIDE:
-                        showPages( _node->getXOffset(), 
-                                           _node->getZOffset(), 
-                                           _node->getWidth() , 
-                                           _node->getHeight() );
-                        break;
-                case Frustum::OUTSIDE:
-                        break;
-        }
+  switch( _node->cull() )
+  {
+    case Frustum::INTERSECT:
+      if ( !_node->isChildless() )
+      {
+        pTerrainQuad *children = _node->getChildren();
+        for ( int i = 0; i < 4; ++i, ++children )
+          determineVisiblePages( *children );
+      }
+      else
+      {
+        showPages( _node->getXOffset(),
+                   _node->getZOffset(), 1, 1 );
+      }
+      break;
+    case Frustum::INSIDE:
+      showPages( _node->getXOffset(),
+                 _node->getZOffset(),
+                 _node->getWidth() ,
+                 _node->getHeight() );
+      break;
+    case Frustum::OUTSIDE:
+      break;
+  }
 }
 
 void Terrain::tick( float _dt )
 {
-        for ( unsigned int i = 0; i < buffers.size(); ++i )
-                broker->release( buffers[i].vbIdentifier, buffers[i].ibIdentifier );
-        buffers.clear();        
-        pTerrainPage page = NULL;
-        //Extract the frustum planes out of the modelview matrix.
-        frustum->extractPlanes();       
-        // Lets see which pages are visible.
-        determineVisiblePages( root );
-        int wantedLeft, wantedRight, wantedBottom, wantedTop, minLOD;
-        pTerrainPage neighbor = NULL;
-        page = activePages;
-        bool dirty;
-        current = 0;
-        BufferInfo bi;
-        broker->acquire( bi.vbIdentifier, bi.ibIdentifier );
-        buffers.push_back( bi );
-        int dirtyRounds = 0;
-        do {
-                dirtyRounds++;
-                dirty = false;
-                page = activePages;
-                while ( page ) {
-                        if ( !page->isActive() ) {
-                                pTerrainPage tmp = page;
-                                page = tmp->getNext();
-                                tmp->setVisibility( false );
-                                continue;
-                        }
-                        wantedLeft = wantedRight = wantedBottom = wantedTop = page->getWantedLOD();
-                        if ( ( neighbor = page->getLeft() ) && ( neighbor->isActive() ) ) 
-                                wantedLeft = neighbor->getWantedLOD();
-                        if ( ( neighbor = page->getRight() ) && ( neighbor->isActive() ) ) 
-                                wantedRight = neighbor->getWantedLOD();
-                        if ( ( neighbor = page->getTop() ) && ( neighbor->isActive() ) ) 
-                                wantedTop = neighbor->getWantedLOD();
-                        if ( ( neighbor = page->getBottom() ) && ( neighbor->isActive() ) ) 
-                                wantedBottom = neighbor->getWantedLOD();                        
-                
-                        minLOD = std::min( std::min( wantedBottom, wantedTop ), 
-                                std::min( wantedLeft, wantedRight ) );  
-                        if ( minLOD < page->getWantedLOD()-1 ) {
-                                page->setWantedLOD( minLOD+1 );
-                                dirty = true;
-                        }       
-                        page = page->getNext();
-                }
-        } while ( dirty );
-        
-        page = activePages;
-        while ( page ) {
-                assert( page->isActive() );
-                page->updateTesselation();
-                page = page->getNext();
-        }
-        //If there is some data in the buffer, we need to upload the data
-        //into the vram...
-        if ( buffers[current].numIndices != 0 ) {
-                BufferInfo bi = buffers[current];       
-                glBindBufferARB( GL_ARRAY_BUFFER_ARB, bi.vbIdentifier );
-                glBufferDataARB( GL_ARRAY_BUFFER_ARB, MAX_VERTICES*sizeof( Vertex ), 
-                        vertices, GL_DYNAMIC_DRAW_ARB );
-                glBindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB, bi.ibIdentifier );
-                glBufferDataARB( GL_ELEMENT_ARRAY_BUFFER_ARB, MAX_INDICES*sizeof( short ), 
-                        indices, GL_DYNAMIC_DRAW_ARB );
-        }       
+  for ( unsigned int i = 0; i < buffers.size(); ++i )
+    broker->release( buffers[i].vbIdentifier, buffers[i].ibIdentifier );
+  buffers.clear();
+  pTerrainPage page = NULL;
+  //Extract the frustum planes out of the modelview matrix.
+  frustum->extractPlanes();
+  // Lets see which pages are visible.
+  determineVisiblePages( root );
+  int wantedLeft, wantedRight, wantedBottom, wantedTop, minLOD;
+  pTerrainPage neighbor = NULL;
+  page = activePages;
+  bool dirty;
+  current = 0;
+  BufferInfo bi;
+  broker->acquire( bi.vbIdentifier, bi.ibIdentifier );
+  buffers.push_back( bi );
+  int dirtyRounds = 0;
+  do
+  {
+    dirtyRounds++;
+    dirty = false;
+    page = activePages;
+    while ( page )
+    {
+      if ( !page->isActive() )
+      {
+        pTerrainPage tmp = page;
+        page = tmp->getNext();
+        tmp->setVisibility( false );
+        continue;
+      }
+      wantedLeft = wantedRight = wantedBottom = wantedTop = page->getWantedLOD();
+      if ( ( neighbor = page->getLeft() ) && ( neighbor->isActive() ) )
+        wantedLeft = neighbor->getWantedLOD();
+      if ( ( neighbor = page->getRight() ) && ( neighbor->isActive() ) )
+        wantedRight = neighbor->getWantedLOD();
+      if ( ( neighbor = page->getTop() ) && ( neighbor->isActive() ) )
+        wantedTop = neighbor->getWantedLOD();
+      if ( ( neighbor = page->getBottom() ) && ( neighbor->isActive() ) )
+        wantedBottom = neighbor->getWantedLOD();
+
+      minLOD = std::min( std::min( wantedBottom, wantedTop ),
+                         std::min( wantedLeft, wantedRight ) );
+      if ( minLOD < page->getWantedLOD()-1 )
+      {
+        page->setWantedLOD( minLOD+1 );
+        dirty = true;
+      }
+      page = page->getNext();
+    }
+  }
+  while ( dirty );
+
+  page = activePages;
+  while ( page )
+  {
+    assert( page->isActive() );
+    page->updateTesselation();
+    page = page->getNext();
+  }
+  //If there is some data in the buffer, we need to upload the data
+  //into the vram...
+  if ( buffers[current].numIndices != 0 )
+  {
+    BufferInfo bi = buffers[current];
+    glBindBufferARB( GL_ARRAY_BUFFER_ARB, bi.vbIdentifier );
+    glBufferDataARB( GL_ARRAY_BUFFER_ARB, MAX_VERTICES*sizeof( Vertex ),
+                     vertices, GL_DYNAMIC_DRAW_ARB );
+    glBindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB, bi.ibIdentifier );
+    glBufferDataARB( GL_ELEMENT_ARRAY_BUFFER_ARB, MAX_INDICES*sizeof( short ),
+                     indices, GL_DYNAMIC_DRAW_ARB );
+  }
 }
 
 void Terrain::draw( )
 {
-        pTerrainPage page = NULL;
-        glGetError();
-        /*pTerrainPage page = NULL;
-        frustum->extractPlanes();*/
-        Plane far = frustum->getPlane( Frustum::FAR );
-        //Due to some reason, the OpenGL implementors chose the plane equation
-        //to an array of doubles. So we will make them happy.
-        double farPlane[] = { far.n.x, far.n.y, far.n.z, far.k };
-        glEnable( GL_CLIP_PLANE0 );
-        glClipPlane( GL_CLIP_PLANE0, farPlane );
-        glPushAttrib( GL_ALL_ATTRIB_BITS );
-        glPushClientAttrib( GL_CLIENT_VERTEX_ARRAY_BIT );
-        /*
-         * Enable texture and vertex arrays for the first and the second texture
-         * units and disable the normal arrays.
-         */
-        glClientActiveTextureARB( GL_TEXTURE0_ARB );    
-                glEnableClientState( GL_VERTEX_ARRAY );
-                glEnableClientState( GL_TEXTURE_COORD_ARRAY ); 
-                glDisableClientState( GL_NORMAL_ARRAY );
-                                
-        glClientActiveTextureARB( GL_TEXTURE1_ARB );    
-                glEnableClientState( GL_VERTEX_ARRAY );
-                glEnableClientState( GL_TEXTURE_COORD_ARRAY );
-                glDisableClientState( GL_NORMAL_ARRAY ); 
-        glDisable( GL_CULL_FACE );
-        glDisable( GL_LIGHTING );
-        glColor3f( 1.0f, 1.0f, 1.0f );
-        //glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
-        cullCount = 0;
-        glEnable( GL_BLEND );
-        glDepthFunc( GL_LEQUAL );
-        glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
-        for ( unsigned int i = 0; i < layers.size(); ++i ) {
-                LayerInfo* layer= layers[i];
-                page = activePages;     
-                                
-                glActiveTextureARB( GL_TEXTURE1_ARB );
-                glClientActiveTextureARB( GL_TEXTURE1_ARB );
-                if ( layer->detail ) {
-                        //glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_BLEND );
-                        glEnable( GL_TEXTURE_2D );
-                        glBindTexture( GL_TEXTURE_2D, layer->detail->getTexture() );
-                        glMatrixMode( GL_TEXTURE );
-                        glLoadIdentity();
-                        glScalef( layer->repeatX, layer->repeatZ, 1.0f );
-                }       
-                else {
-                        glDisable( GL_TEXTURE_2D );
-                }
-                glEnable( GL_CULL_FACE );
-                glCullFace( GL_BACK );
-                glClientActiveTextureARB( GL_TEXTURE0_ARB );
-                glActiveTextureARB( GL_TEXTURE0_ARB );
-                glEnable( GL_TEXTURE_2D );
-                if ( layer->alpha ) {
-                        //glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_BLEND );                   
-                        glBindTexture( GL_TEXTURE_2D, layer->alpha->getTexture() );
-                }
-                else {
-                
-                        glBindTexture( GL_TEXTURE_2D, lightmap->getTexture() );                 
-                }
-                glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );                         
-                glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
-                
-                for ( unsigned j = 0; j < buffers.size(); ++j ) {
-                        BufferInfo bi = buffers[j];
-                        glBindBufferARB( GL_ARRAY_BUFFER_ARB, bi.vbIdentifier );
-                        glClientActiveTextureARB( GL_TEXTURE0_ARB );
-                        glInterleavedArrays( GL_T2F_V3F, 0, NULL );
-
-                        glClientActiveTextureARB( GL_TEXTURE1_ARB );
-                        glInterleavedArrays( GL_T2F_V3F, 0, NULL );
-
-                        glBindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB, 
-                                bi.ibIdentifier );      
-
-                        glDrawElements( GL_TRIANGLE_STRIP, bi.numIndices, 
-                                                        GL_UNSIGNED_SHORT, NULL );
-                }
-                while ( page ) {
-                        if ( page->hasMaterial( i ) )
-                                page->draw();
-                        page = page->getNext();
-                }
-        }
-        glClientActiveTextureARB( GL_TEXTURE1_ARB );    
-        glActiveTextureARB( GL_TEXTURE1_ARB );
-        glDisable( GL_TEXTURE_2D );
-        glActiveTextureARB( GL_TEXTURE0_ARB );
-        glEnable( GL_LIGHTING );
-        glMatrixMode( GL_TEXTURE );
-        glLoadIdentity();
-        glPopAttrib();
-        glPopClientAttrib();
-        glCullFace( GL_FRONT );
-        glDisable( GL_CLIP_PLANE0 );
+  pTerrainPage page = NULL;
+  glGetError();
+  /*pTerrainPage page = NULL;
+  frustum->extractPlanes();*/
+  Plane far = frustum->getPlane( Frustum::FAR );
+  //Due to some reason, the OpenGL implementors chose the plane equation
+  //to an array of doubles. So we will make them happy.
+  double farPlane[] = { far.n.x, far.n.y, far.n.z, far.k };
+  glEnable( GL_CLIP_PLANE0 );
+  glClipPlane( GL_CLIP_PLANE0, farPlane );
+  glPushAttrib( GL_ALL_ATTRIB_BITS );
+  glPushClientAttrib( GL_CLIENT_VERTEX_ARRAY_BIT );
+  /*
+   * Enable texture and vertex arrays for the first and the second texture
+   * units and disable the normal arrays.
+   */
+  glClientActiveTextureARB( GL_TEXTURE0_ARB );
+  glEnableClientState( GL_VERTEX_ARRAY );
+  glEnableClientState( GL_TEXTURE_COORD_ARRAY );
+  glDisableClientState( GL_NORMAL_ARRAY );
+
+  glClientActiveTextureARB( GL_TEXTURE1_ARB );
+  glEnableClientState( GL_VERTEX_ARRAY );
+  glEnableClientState( GL_TEXTURE_COORD_ARRAY );
+  glDisableClientState( GL_NORMAL_ARRAY );
+  glDisable( GL_CULL_FACE );
+  glDisable( GL_LIGHTING );
+  glColor3f( 1.0f, 1.0f, 1.0f );
+  //glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
+  cullCount = 0;
+  glEnable( GL_BLEND );
+  glDepthFunc( GL_LEQUAL );
+  glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
+  for ( unsigned int i = 0; i < layers.size(); ++i )
+  {
+    LayerInfo* layer= layers[i];
+    page = activePages;
+
+    glActiveTextureARB( GL_TEXTURE1_ARB );
+    glClientActiveTextureARB( GL_TEXTURE1_ARB );
+    if ( layer->detail )
+    {
+      //glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_BLEND );
+      glEnable( GL_TEXTURE_2D );
+      glBindTexture( GL_TEXTURE_2D, layer->detail->getTexture() );
+      glMatrixMode( GL_TEXTURE );
+      glLoadIdentity();
+      glScalef( layer->repeatX, layer->repeatZ, 1.0f );
+    }
+    else
+    {
+      glDisable( GL_TEXTURE_2D );
+    }
+    glEnable( GL_CULL_FACE );
+    glCullFace( GL_BACK );
+    glClientActiveTextureARB( GL_TEXTURE0_ARB );
+    glActiveTextureARB( GL_TEXTURE0_ARB );
+    glEnable( GL_TEXTURE_2D );
+    if ( layer->alpha )
+    {
+      //glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_BLEND );
+      glBindTexture( GL_TEXTURE_2D, layer->alpha->getTexture() );
+    }
+    else
+    {
+
+      glBindTexture( GL_TEXTURE_2D, lightmap->getTexture() );
+    }
+    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
+    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
+
+    for ( unsigned j = 0; j < buffers.size(); ++j )
+    {
+      BufferInfo bi = buffers[j];
+      glBindBufferARB( GL_ARRAY_BUFFER_ARB, bi.vbIdentifier );
+      glClientActiveTextureARB( GL_TEXTURE0_ARB );
+      glInterleavedArrays( GL_T2F_V3F, 0, NULL );
+
+      glClientActiveTextureARB( GL_TEXTURE1_ARB );
+      glInterleavedArrays( GL_T2F_V3F, 0, NULL );
+
+      glBindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB,
+                       bi.ibIdentifier );
+
+      glDrawElements( GL_TRIANGLE_STRIP, bi.numIndices,
+                      GL_UNSIGNED_SHORT, NULL );
+    }
+    while ( page )
+    {
+      if ( page->hasMaterial( i ) )
+        page->draw();
+      page = page->getNext();
+    }
+  }
+  glClientActiveTextureARB( GL_TEXTURE1_ARB );
+  glActiveTextureARB( GL_TEXTURE1_ARB );
+  glDisable( GL_TEXTURE_2D );
+  glActiveTextureARB( GL_TEXTURE0_ARB );
+  glEnable( GL_LIGHTING );
+  glMatrixMode( GL_TEXTURE );
+  glLoadIdentity();
+  glPopAttrib();
+  glPopClientAttrib();
+  glCullFace( GL_FRONT );
+  glDisable( GL_CLIP_PLANE0 );
 }
 
 inline Uint8 getAlpha( const SDL_Surface *_s, int _x, int _y )
 {
-    int bpp = _s->format->BytesPerPixel;
-    Uint8 *p = (Uint8 *)_s->pixels + _y*_s->pitch + _x * bpp;
-        Uint32 pixel = 0;
-    switch( bpp ) {
+  int bpp = _s->format->BytesPerPixel;
+  Uint8 *p = (Uint8 *)_s->pixels + _y*_s->pitch + _x * bpp;
+  Uint32 pixel = 0;
+  switch( bpp )
+  {
     case 1:
-        pixel = *p;
-                break;
+      pixel = *p;
+      break;
     case 2:
-                if ( SDL_BYTEORDER == SDL_BIG_ENDIAN )
-                        pixel = p[0] << 8 | p[1]; 
-                else
-                pixel = *(Uint16 *)p;
-                break;
+      if ( SDL_BYTEORDER == SDL_BIG_ENDIAN )
+        pixel = p[0] << 8 | p[1];
+      else
+        pixel = *(Uint16 *)p;
+      break;
     case 3:
-        if( SDL_BYTEORDER == SDL_BIG_ENDIAN )
-            pixel = p[0] << 16 | p[1] << 8 | p[2];
+      if( SDL_BYTEORDER == SDL_BIG_ENDIAN )
+        pixel = p[0] << 16 | p[1] << 8 | p[2];
+      else
+        pixel = p[0] | p[1] << 8 | p[2] << 16;
+      break;
+    case 4:
+      pixel = *(Uint32 *)p;
+      break;
+    default:
+      return 255; /* shouldn't happen, but avoids warnings */
+  }
+  Uint8 r,g,b,a;
+  SDL_GetRGBA( pixel, _s->format, &r, &g, &b, &a );
+  return a;
+}
+
+void Terrain::determineLayerVisibility( int _layer )
+{
+  LayerInfo * layer = layers[_layer];
+  if ( !layer->alpha )
+  {
+    int numPages = pagesX*pagesZ;
+    for ( int i = 0; i < numPages; ++i )
+      pages[i]->setLayerVisibility( _layer, LV_FULL );
+
+    return;
+  }
+  SDL_Surface *alpha = const_cast<SDL_Surface*>( layer->alpha->getStoredImage() );
+  SDL_LockSurface( alpha );
+  float du = ( (float)alpha->w)/pagesX;
+  float dv = ( (float)alpha->h)/pagesZ;
+  float u = 0.0f, v = 0.0f;
+  for ( int pageX = 0; pageX < pagesX; ++pageX )
+  {
+    v = 0.0f;
+    for ( int pageZ = 0; pageZ < pagesZ; ++pageZ )
+    {
+      bool full = true; bool has = false;
+      for ( int x = 0; x < (int)PAGE_SIZE; ++x )
+      {
+        for ( int z = 0; z < (int)PAGE_SIZE; ++z )
+        {
+          Uint8 a = getAlpha( alpha, (int)u, (int)v );
+          if ( a )
+            has = true;
+          if ( a < 255 )
+            full = false;
+        }
+      }
+      LayerVisibility lv;
+      if ( has )
+      {
+        if ( full )
+          lv = LV_FULL;
         else
-            pixel = p[0] | p[1] << 8 | p[2] << 16;
-                break;
-    case 4:
-        pixel = *(Uint32 *)p;
-                break;
-    default:
-        return 255; /* shouldn't happen, but avoids warnings */
-    }
-        Uint8 r,g,b,a;
-        SDL_GetRGBA( pixel, _s->format, &r, &g, &b, &a );
-        return a;
-}
-
-void Terrain::determineLayerVisibility( int _layer )
-{
-        LayerInfo * layer = layers[_layer];
-        if ( !layer->alpha ) {
-                int numPages = pagesX*pagesZ;
-                for ( int i = 0; i < numPages; ++i )
-                        pages[i]->setLayerVisibility( _layer, LV_FULL );
-                        
-                return;
-        }
-        SDL_Surface *alpha = const_cast<SDL_Surface*>( layer->alpha->getStoredImage() );        
-        SDL_LockSurface( alpha );
-        float du = ( (float)alpha->w)/pagesX;
-        float dv = ( (float)alpha->h)/pagesZ;
-        float u = 0.0f, v = 0.0f;
-        for ( int pageX = 0; pageX < pagesX; ++pageX ) {
-                v = 0.0f;
-                for ( int pageZ = 0; pageZ < pagesZ; ++pageZ ) {
-                        bool full = true; bool has = false;
-                        for ( int x = 0; x < (int)PAGE_SIZE; ++x ) {
-                                for ( int z = 0; z < (int)PAGE_SIZE; ++z ) {
-                                        Uint8 a = getAlpha( alpha, (int)u, (int)v );
-                                        if ( a ) 
-                                                has = true;
-                                        if ( a < 255 )
-                                                full = false;
-                                }
-                        }
-                        LayerVisibility lv;
-                        if ( has ) {
-                                if ( full )
-                                        lv = LV_FULL;
-                                else
-                                        lv = LV_PARTIAL;
-                        }
-                        else {
-                                lv = LV_NO;
-                        }
-                        getPage( pageX, pageZ )->setLayerVisibility( _layer, lv );
-                        v+= dv;
-                }
-                u+= du;
-        }
-        SDL_UnlockSurface( alpha );
+          lv = LV_PARTIAL;
+      }
+      else
+      {
+        lv = LV_NO;
+      }
+      getPage( pageX, pageZ )->setLayerVisibility( _layer, lv );
+      v+= dv;
+    }
+    u+= du;
+  }
+  SDL_UnlockSurface( alpha );
 }
 
 void Terrain::getAltitude( Vector& _alt, Vector& _normal )
 {
-        float xScaled = _alt.x / scale.x, zScaled = _alt.z / scale.z;
-        //The offset on the map
-        int xOff =  (int)xScaled, zOff = (int)zScaled;
-        //The interpolation values.
-        float u = xScaled-xOff, v = zScaled-zOff;
-        
-        float dX = scale.x / ( pageSize-1 );
-        float dZ = scale.z / ( pageSize-1 );
-        
-        //If u is bigger than v, we are on the lower triangle...
-        if ( u > v ) {
-                
-                float alt[] = {
-                        getAltitude( xOff+0, zOff+0 )*scale.y,
-                        getAltitude( xOff+1, zOff+0 )*scale.y,
-                        getAltitude( xOff+1, zOff+1 )*scale.y };
-                _alt.y = (1.0f-u-v)*alt[0]+u*alt[1]+v*alt[2];
-                
-                //Since we know about the directions of some x and z-coordinates, 
-                //not the whole cross products needs to be calculated. Grab yourself
-                //pen and paper :)
-                _normal.x =  dZ*( alt[0] - alt[1] );                            
-                _normal.y =  dZ*dX;
-                _normal.z = -dX*( alt[2] - alt[1] );
-        }
-        else {
-                float alt[] = {
-                        getAltitude( xOff+0, zOff+0 )*scale.y,
-                        getAltitude( xOff+0, zOff+1 )*scale.y,
-                        getAltitude( xOff+1, zOff+1 )*scale.y };                        
-                _alt.y = (1.0f-u-v)*alt[0]+v*alt[1]+u*alt[2];
-                //Since we know about the directions of some x and z-coordinates, 
-                //not the whole cross products needs to be calculated. Grab yourself
-                //pen and paper :)
-                _normal.x = -dZ*( alt[2] - alt[1] );                            
-                _normal.y =  dZ*dX;
-                _normal.z =  dX*( alt[0] - alt[1] );
-        }
+  float xScaled = _alt.x / scale.x, zScaled = _alt.z / scale.z;
+  //The offset on the map
+  int xOff =  (int)xScaled, zOff = (int)zScaled;
+  //The interpolation values.
+  float u = xScaled-xOff, v = zScaled-zOff;
+
+  float dX = scale.x / ( pageSize-1 );
+  float dZ = scale.z / ( pageSize-1 );
+
+  //If u is bigger than v, we are on the lower triangle...
+  if ( u > v )
+  {
+
+    float alt[] = {
+                    getAltitude( xOff+0, zOff+0 )*scale.y,
+                    getAltitude( xOff+1, zOff+0 )*scale.y,
+                    getAltitude( xOff+1, zOff+1 )*scale.y };
+    _alt.y = (1.0f-u-v)*alt[0]+u*alt[1]+v*alt[2];
+
+    //Since we know about the directions of some x and z-coordinates,
+    //not the whole cross products needs to be calculated. Grab yourself
+    //pen and paper :)
+    _normal.x =  dZ*( alt[0] - alt[1] );
+    _normal.y =  dZ*dX;
+    _normal.z = -dX*( alt[2] - alt[1] );
+  }
+  else
+  {
+    float alt[] = {
+                    getAltitude( xOff+0, zOff+0 )*scale.y,
+                    getAltitude( xOff+0, zOff+1 )*scale.y,
+                    getAltitude( xOff+1, zOff+1 )*scale.y };
+    _alt.y = (1.0f-u-v)*alt[0]+v*alt[1]+u*alt[2];
+    //Since we know about the directions of some x and z-coordinates,
+    //not the whole cross products needs to be calculated. Grab yourself
+    //pen and paper :)
+    _normal.x = -dZ*( alt[2] - alt[1] );
+    _normal.y =  dZ*dX;
+    _normal.z =  dX*( alt[0] - alt[1] );
+  }
 }
 
 void Terrain::showPages( int _x0, int _z0, int _width, int _height )
 {
-        for ( int x = 0; x < _width; ++x ) {
-                for ( int z = 0; z < _height; ++z ) {
-                        pTerrainPage page = getPage( _x0+x, _z0+z );
-                        page->setVisibility( true );                    
-                        page->chooseLOD();
-
-                }
-        }
-}
+  for ( int x = 0; x < _width; ++x )
+  {
+    for ( int z = 0; z < _height; ++z )
+    {
+      pTerrainPage page = getPage( _x0+x, _z0+z );
+      page->setVisibility( true );
+      page->chooseLOD();
+
+    }
+  }
+}