Le 27/12/2016 à 23:32, Bald Eagle a écrit :
> The subject of creating a "simple" animation of a bouncing ball recently came
> up, and as I looked into it, and considered how to do this, it is apparently
> less simple than I thought it would be.
> 
> I would imagine that a critical factor in making the animation work out well
> would be to find the total time for the ball to (practically) come to rest, and
> then define the number of frames in the animation based on that.
> 
> Perhaps then one could work out the time per fall/bounce, the heights,
> velocities, positions, etc. in a fairly straightforward manner.
> 
> I think for a good animation, there would need to be a good way to handle the
> squashing of the ball and the deceleration prior to restoring the ball to a
> sphere and resuming the bouncing cycle.
> Probably define a percentage squash factor and use that times the radius to
> establish the 'zero' height point.
> 
> I searched around for a good thread, because I figured that surely someone had
> done something so basic - but there were no example scenes that I found, and
> most people were using particle systems of some sort to make more complicated /
> more general animations.
> 
> I was wondering if anyone had any practical and concrete advice on how to handle
> the various parts of the animation, and how to organize the code in a sensible
> manner.
> 
> I'm traveling and juggling a lot of metaphorical balls at the moment, so it may
> not be until next week that a get a chance to sit down, gather my wits about me,
> and hammer out some semi-functional SDL, but at least I was hoping to read some
> comments advice, and code snippets that would set me on the right track from the
> start.
> 
> 
> Thanks!   :)
> 
> 

Does the ball really need to be seen deformed ? Can you consider a
billiard (pool) ball, or a bowling ball ?

Rule of animation & cartoon: when cutting a tree with an axe, do not
bother with the frame on which the axe meet the tree.

There was a bouncing ball in the scene of povray: boing , but you will
need any of 3.1 up to 3.6.1 version (of particular interest
scenes/animation/boing/bounce.pov )

Post a reply to this message