Multiple arbitrary shapes

Today we made our application a bit more fun to use. None of us could be bothered to make more test polygons in Blender. Instead, we can now click on arbitrary points in the scene to create a shape that works just like any other polygon.

As you can see, we also added functionality so that lines between all shapes are drawn, and the color changes if a shape intersects with any other.

One problem we have with arbitrary shapes is that our algorithm doesn't work for concave shapes. While Rodrigo and I have been working on the contents of this blog post, Felix has been working on some exciting stuff to fix this but I think that deserves its own blog post because he is a 

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