Algodoo

This scene generates excellent springs. Nice work!

I ran into an interesting problem with my spring generator scenes. Since I use a general solution that could include springs with tapered wire, I calculate the centroid of each spring element polygon. It turns out the centroid calculation degrades the further it is away from [0,0], so that a small spring created far away from the origin looked disheveled. I corrected this in all my applicable spring scenes. I now calculate the centroid with the polygon over the origin before moving it to the final destination.