doorknob

Physics engine

TODO:

• style guide
• setup to build
• a Vector class
  • (x,y)
  • sq_length()
  • dot()
  • normalize()
  • add, subtract, component-wise multiplication
• a 2x2 Matrix
  • rotations
• a World class
• a Body class
  • position
  • geometry
  • rotation
  • mass
• a Geometry class
  • Circle
  • Box
  • Terrain... bezier curves???? no