concave asteroids

[0xDE57]

Can we use multiple convex polygons to create a concave polygon?
Can we glue polygons together?

From the docs:

Weld Joint

The weld joint attempts to constrain all relative motion between two bodies. See the Cantilever.h in the testbed to see how the weld joint behaves.

It is tempting to use the weld joint to define breakable structures. However, the Box2D solver is iterative so the joints are a bit soft. So chains of bodies connected by weld joints will flex.

**Instead it is better to create breakable bodies starting with a single body with multiple fixtures. When the body breaks, you can destroy a fixture and recreate it on a new body. See the Breakable example in the testbed.**

https://box2d.org/documentation/md__d_1__git_hub_box2d_docs_dynamics.html

[0xDE57]

EarClippingTriangulator should handle convex shapes.

Image source: https://www.youtube.com/watch?v=2x4ioToqe_c

[0xDE57]

With convex polygons I can have spectre based hat/turtle asteroids that tile into eachother!

https://www.youtube.com/watch?v=K6wXQvL5KRo

Every tiling by Spectres is closely related to a tiling with a sparse distribution of hats lying within a dense field of turtles, and one with a sparse distribution of turtles lying within a dense field of hats. In this short loop we demonstrate that equivalence by morphing continuously between these three tilings.

A chiral aperiodic monotile. See:
https://cs.uwaterloo.ca/~csk/spectre/

See also: penrose tiling!