Hi Guys If you type that thread title into Google images, you get plenty of examples describing bouncing ball movement, but I’d like to know what a ball bouncing up and down on the same spot looks like. Are there any examples of that? I’m after 180 degrees of amplitude data essentially so a program could simulate a convincing bouncing ball on a 2D screen that never loses energy. I’m just not sure if that will look sinusoidal or actually circular. Cheers, Brek.

it wont be sinusoidal, the top half of the wave will look roughly sinusoidal. The bottom half will be "pointy" This might help http://www.real-world-physics-problems.com/bouncing-ball-physics.html

Given the basket ball image example on that page, I should be able to try just the peak part from a sin lookup table.

I only skimmed that page, I was only thinking about the path the ball would follow, not the deformation of the ball. A simpler way to describe it would be as a positive rectified sine wave, that shouldn't be too hard to plot. I don't think that is the path a bouncing ball would actually follow but it would look close enough.

Kind of ... sort of I think it could be better but not sure why. Maybe the downward acceleration should be greater. https://www.youtube.com/watch?v=zWXe18iCvpM

Ok, I’m happy with this one https://www.youtube.com/watch?v=-P8oZkYYvCY It has a linear component that would end up making the ramp steeper, as if cut from the peaks of a sine, and then the empty space trimmed out. Basically the index for the sine table is divided by a number, and the result added to the lookup value of the sine table.