On Jan 12, 2011, at 17:47 , Christopher Wright wrote: > This isn't possible in the construct of QC
I understand that. Although logical, it seems paradoxal that Quartz is so good at real-time rendering and so weak at real-time input. I'll investigate further on my options. Nothing happens between two frames. Check. On Jan 10, 2011, at 1:48 , Christopher Wright wrote: > In fact, I can't think of any times I've wanted a queue _not_ in continuous > mode, but there's probably a novel use out there somewhere. If you need to retrieve a direction angle from a movement using atan2(x,y), you must update two queues only if their input values change - otherwise you end up with equal numbers when motion stops, resulting in a sudden drop to zero - whatever direction you were facing a frame before. Updating only when value changes allows you in this situation to keep your last few deltas at hand, and return consistant directional calculation. On the other hand, calculating movement speed calls for continuous filling, otherwise it won't decrease if you stop moving. dimitri
dd_Movement to trajectory.qtz
Description: application/quartzcomposer
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