https://wiki.synfig.org/index.php?action=history&feed=atom&title=Doc_talk%3ABall_Bounce 2026-05-01T01:04:16Z Revision history for this page on the wiki MediaWiki 1.26.3 https://wiki.synfig.org/index.php?title=Doc_talk:Ball_Bounce&diff=12160&oldid=prev 2010-05-05T10:19:10Z

<p>math solution</p> <p><b>New page</b></p><div>== About math-guided solution ==<br /> Although I am still a newbie on Synfig, I have tried to achieve the math-related solution, it may be the simpler aswell!<br /> <br /> I am not sure to have understood all the concepts used, that's why I guess it is not completely correct.<br /> <br /> My approach is to imagine x and y movements as independent, so the x is simple (uniform rectilinear movement) and the y a little more complex. The first idea was to use the classical equations for acceleration (and gravity), but this would lead to need one equation per step (up-down or down-up). The ultimate idea is to use the sine function to describe the position at each timepoint, so... one equation would last forever!<br /> <br /> Steps:<br /> * Origin converted to compound<br /> * X manualy animated to go linearly from left to right of the canvas: simple.<br /> * Y converted to sine<br /> * Sine Amplitude set to 1 (why? I tried to set this to -172, wich is the initial height of the circle but it disappeard! Well, just works)<br /> * Sine DEG to time loop, and then:<br /> * Timeloop link to 0 at 0 seconds and 180 at 1 second<br /> * Timeloop duration: 1 second<br /> * Rest timeloop parameters left to 0<br /> <br /> I guess the result is almost correct although the shape of the curve is not perfect, but I don't know why. I don't know how to upload a screenshot. Any help? Can you correct this?</div>

Viridis