Timeline for How can I choose a suitable refresh rate to make a good animation of the wagon-wheel effect?
Current License: CC BY-SA 3.0
4 events
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| May 9, 2016 at 18:15 | comment | added | Massimo Ortolano |
Thank you, the problem is that I don't want to have a smooth movement, because I want to show the phenomenon of aliasing, but for this I need exact timing: e.g., I'd like to show that with f=0.5 and fs=1 one gets exactly two points per period, the same two, and that for f=0.98 and fs=1 you get a backward motion with a period of exactly 50 s (it gets nowhere near this). But probably Animate has not enough control on the timing for such kind of animations (I'd like to show live these changes).
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| May 9, 2016 at 17:50 | comment | added | Edmund |
Yes, moving through the animation variables at x times per second and painting the screen at x times per second should get it reasonable stationery. I do find it is extra jittery for higher values. The main point of the above is that your f and fs ranges are out of sync from the outset.
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| May 9, 2016 at 12:48 | comment | added | Massimo Ortolano |
Rethinking about what you wrote in the second paragraph, it's not clear to me why you say "You will only get a stationary image when both f and fs equal 1". I think it should be stationary whenever f=fs, regardless of the value, and from a few experiments with the parameters it seems really like this, apart from the difference described in the question which appears to be computer dependent.
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| May 9, 2016 at 0:26 | history | answered | Edmund | CC BY-SA 3.0 |