mvGetTrackLayer, mvSetTrackLayer - set/get the layer of a track
DMstatus mvSetTrackLayer( MVid track, int layer );
int mvGetTrackLayer( MVid track );
The ``layer'' value (a signed integer) of a track determines its
rendering order with respect to other tracks. For visual tracks (e.g.
image tracks), tracks with smaller (ie, more negative) ``layer'' value
are rendered on top of (possibly obscuring) tracks with bigger (ie, more
positive) ``layer'' value. For aural tracks (e.g. audio tracks), this
value is ignored during rendering.
If a there is more than one track in a single layer, the tracks are
rendered in an order determined by the track index (see
mvFindTrackByIndex(3dm)). When new tracks are created, by default, they
are assigned to layer 0.
mvSetTrackLayer sets the layer value of the track to be layer.
mvGetTrackLayer returns the layer value of the track.
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