# File lib/as_physics.rb, line 6 def initialize(w, h, density, offset) hw = w/2; hh = h/2 verts = [ vec2(-hw, -hh), vec2(-hw, hh), vec2( hw, hh), vec2( hw, -hh), ] mass = w*h*density moment = CP.moment_for_poly(mass, verts, offset) super(CP::Body.new(mass, moment), verts, offset) end