void Create_Map()
{
  int x, z;
  for (z=0;z<size;z++)
  for (x=0;x<size;x++)
  {
    Map.tile[x][z].x = (float)x-(size/2);
    Map.tile[x][z].y = -1.0f;
    Map.tile[x][z].z = (float)z-(size/2);
  }
}
  

  
void Draw_Map()
{
  int x, z;
  for (z=0;z<size;z++)
  for (x=0;x<size;x++)
  {
    glBegin(GL_QUADS);
    glVertex3f(Map.tile[x][z].x, Map.tile[x][z].y, Map.tile[x][z].z);
    glVertex3f(Map.tile[x+1][z].x, Map.tile[x+1][z].y, Map.tile[x+1][z].z);
    glVertex3f(Map.tile[x+1][z+1].x, Map.tile[x+1][z+1].y, Map.tile[x+1][z+1].z);
    glVertex3f(Map.tile[x][z+1].x, Map.tile[x][z+1].y, Map.tile[x][z+1].z);
    glEnd();
  }
}
  

        void Draw_Map(){       int x, z;       for (z=0;z<size;z++)       {          for (x=0;x<size;x++)            {               // Add this line               glLoadName(z+x*size);               glBegin(GL_QUADS);               glVertex3f(Map.tile[x][z].x, Map.tile[x][z].y, Map.tile[x][z].z);                   glVertex3f(Map.tile[x+1][z].x, Map.tile[x+1][z].y, Map.tile[x+1][z].z);                   glVertex3f(Map.tile[x+1][z+1].x, Map.tile[x+1][z+1].y, Map.tile[x+1][z+1].z);                   glVertex3f(Map.tile[x][z+1].x, Map.tile[x][z+1].y, Map.tile[x][z+1].z);                   glEnd();            }     }}    

        bool PickTile(int x, int y){    // check to see if x,y are even pointing at the map    // if not it's faster if we don't even test them for picking    GLuint Buffer[512];    GLint  Hits;    GLint  Viewport[4];    glGetIntegerv(GL_VIEWPORT, Viewport);    glSelectBuffer(512, Buffer);    glRenderMode(GL_SELECT);    glInitNames();    glPushName(0);    glMatrixMode(GL_PROJECTION);    glLoadIdentity();// Note change y to Window.Height-y if picking seems upside down    gluPickMatrix(x, y, 1.0f, 1.0f, Viewport);    gluPerspective(45.0f, f_Ratio, 0.1f, 100.0f);    glMatrixMode(GL_MODELVIEW);    // Note that this does NOT actually draw the map, you must     //do that elsewhere, because we are in GL_SELECT mode    Draw_Map();           glMatrixMode(GL_MODELVIEW);    Hits = glRenderMode(GL_RENDER); // Returns how many objects                                     // are drawn at [x,y]     if (Hits > 0)    {	GLuint Picked = Buffer[3];	GLuint Depth  = Buffer[1];	for (int i = 1; i < Hits; i++)	{            // Check if this hit is over the previous one	    if ((Buffer[i*4+1] < Depth))  	    {		Picked = Buffer[i*4+3];		Depth  = Buffer[i*4+1];	    }	}    }    else    {	// Nothing was picked	return false;    }    // Ok, now you can get the value of which tile was selected like this    int MapX = Picked % size; // size is same as in Draw_Map()    int MapY = Picked / size;      return true;}        

    //   TileSizeX = tile width in pixels//   TileSizeY = tile height in pixels// if the screen can scroll right or down//   ScrollX   = number of pixels screen is scrolled right//   ScrollY   = number of pixels screen is scrolled downint TileX = (int)((MouseX + ScrollX) / TileSizeX);int TileY = (int)((MouseY + ScrollY) / TileSizeY);