Modeling crumpling/vanishing 3D object

I'd like to animate a concave donut topology object (coffee cup) as it implodes. The crumpling should be irregular - Like it's done by a hand or by vacuum implosion, not like a bellows compressing. It should preferably crumple in all three di开发者_JS百科mensions, but two dimensions (that is, the result is a line) would also be OK. How can I do this with a FOSS tool like Blender or OpenSCAD?

This can be done using OpenSCAD, though it is going to be very complex: not something for an OpenSCAD beginner to attempt.

You will need to manually draw the donut with polyhedrons and use OpenSCAD's View->animate option, and use the $t (time) variable to draw the donut crumpling over time. The animation functionality in OpenSCAD isn't too well documented but you can find some examples just by visiting thingiverse.com and searching for "animate".

You can use OpenSCAD's rands function to make the implosion more irregular.

I would have posted more links, but I'm not allowed yet. At least the links I posted will get you to the user manual.

Regular crumpling is easy in OPENScad:

difference(){
    cylinder(h=10+100*(1-$t), r=40*(1-$t));
    translate([0,0,10]) cylinder(h=10+90*(1-$t), r=33*(1-$t));
}

Try this with fps=25 and steps=100