ThreeDimSim: Tippe-top simulation

This example shows a simulation of a 'tippe-top'. The tippe-top is a toy consisting of a (hemi)sphere resting on a cylindrical stem. Its center of gravity is off-center, opposite to the stem. When the toy is spinned on the spherical side fast enough,  it will turn itself upside-down, spinning on the stem.

Look at the script file tippetop.thd to see how this simulation was created.