anchor: love.physics.newPolygonShape
  Creates a new PolygonShape.
  
  This shape can have 8 vertices at most, and must form a convex shape.
  shape = love.physics.newPolygonShape( x1, y1, x2, y2, x3, y3, ... )
  x1 number The x position of the first point.
  y1 number The y position of the first point.
  x2 number The x position of the second point.
  y2 number The y position of the second point.
  x3 number The x position of the third point.
  y3 number The y position of the third point.
  ... number You can continue passing more point positions to create the PolygonShape.
  shape PolygonShape A new PolygonShape.
  shape = love.physics.newPolygonShape( vertices )
  vertices table A list of vertices to construct the polygon, in the form of {x1, y1, x2, y2, x3, y3, ...}.
  shape PolygonShape A new PolygonShape.