3dtours
2ee49cfd41
The marquee loops by translating the track by half its width, so the first half has to be at least as wide as the window. A short reel — seven stills, about 1780px — covered a 1440px window but not a 1920px or 2560px one: the strip ran out of frames before the loop restarted, and the band on the right stayed blank until the next pass drifted in. The track now measures one frame's pitch and repeats the reel until a half covers the window, re-measuring on resize. One still in the strip is repeated enough times to loop cleanly on its own; a reel already wide enough is left at a single copy, so nothing is duplicated without cause.
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