Sprites
Sprite tracks are visual tracks (though they can be made transparent) that allow a wide variety of interaction to occur. Generally speaking, in interactive QuickTime, a sprite track is used in all interactive scripting as it is within sprite tracks that your scripts apply.
While a sprite track is visual, all this means is that a graphic file is attached to it. However, this graphic can be transparent, or even so small (say two by two pixels), as to be not visual in the commonly understood way.
The first vog prototype uses three very simple sprites. These are the three thumbnail screenshots that appear when mentioned in the commentary.
note: This page forms a part of a hypertext essay by Adrian Miles. The homepage for this essay is located at:
http://incsub.org/blogtalk/?page_id=74
A long version of this paper (containing some but not all of the text contained in the hypertext version) is available at:
http://incsub.org/blogtalk/?page_id=76
