Share 'Kangaroo2 - scripting custom iteration - examples'

I'm going to post here some examples of writing simple C# scripts which use the Kangaroo library for custom iterative behaviour. While I have posted a number of examples of custom goals before, so far I've not shown much about such custom looping. This can be useful because it allows you to make changes in topology (such as which goals act on which particles, or the number of particles in the sim…