Updates the position and/or color of the object at the
specified depth, depth. The
parameter how determines
what is updated. how can
either be the constant MOD_MATRIX or MOD_COLOR or it can be a
combination of both (MOD_MATRIX|MOD_COLOR).
MOD_COLOR uses the current mulcolor (specified by the
function swf_mulcolor()) and addcolor (specified by
the function swf_addcolor()) to color the object.
MOD_MATRIX uses the current matrix to position the
object.