game.quadrant.x = (w.x+(QUADSIZE-1))/QUADSIZE;
game.quadrant.y = (w.y+(QUADSIZE-1))/QUADSIZE;
game.sector.x = w.x - QUADSIZE*(game.quadrant.x-1);
game.quadrant.x = (w.x+(QUADSIZE-1))/QUADSIZE;
game.quadrant.y = (w.y+(QUADSIZE-1))/QUADSIZE;
game.sector.x = w.x - QUADSIZE*(game.quadrant.x-1);