ply[i].x = cav.player_x[i] + lev.left;
ply[i].y = cav.player_y[i] + lev.top;
ply[i].prev_x = ply[i].x;
ply[i].prev_y = ply[i].y;
ply[i].x = cav.player_x[i] + lev.left;
ply[i].y = cav.player_y[i] + lev.top;
ply[i].prev_x = ply[i].x;
ply[i].prev_y = ply[i].y;