player.fdirz = vg_lerpf( player.fdirz, dirz, 2.4f*vg.time_delta );
player.fdirx = vg_lerpf( player.fdirx, dirx, 0.6f*vg.time_delta );
player.fdirz = vg_lerpf( player.fdirz, dirz, 2.4f*vg.time_delta );
player.fdirx = vg_lerpf( player.fdirx, dirx, 0.6f*vg.time_delta );