testtubegames wrote:For merging, you just need to worry about (a) Conservation of Mass, and (b) Conservation of Momentum (mass*velocity). So make sure the new planet has the sum of the old masses (which I imagine you're already doing). And then sum up the momenta before, and use that to figure out the momentum (and thus velocity) afterwards.

For some reason this didn't work, and that was the first thing I tried... hmm... I'll figure it out.

A Random Player wrote:True! You just need to remember that cos = x/d, and sin = y/d (soh-cah-toa anyone?), and replace it. So in general,

vx += x / d * f(d)

vy += y / d * f(d) Also Andy has a tweet's characters more than twice my post count - 828 vs 484. Also the digits are all powers of 2, and mine is 22^2!

DOH! Haha, neat-o. I'll definitely work on this.