Source code for pymunk.transform

from collections import namedtuple

[docs]class Transform(namedtuple('Transform', ['a','b','c','d','tx','ty'])): """Type used for 2x3 affine transforms. See wikipedia for details: http://en.wikipedia.org/wiki/Affine_transformation The properties map to the matrix in this way: = = == = = == a c tx b d ty = = == An instance can be created in this way:: >>> Transform(1,2,3,4,5,6) Transform(a=1, b=2, c=3, d=4, tx=5, ty=6) Or using the default identity in this way:: >>> Transform.identity() Transform(a=1, b=0, c=0, d=1, tx=0, ty=0) Or overriding only some of the values (on a identity matrix): >>> Transform(b=3,ty=5) Transform(a=1, b=3, c=0, d=1, tx=0, ty=5) """ __slots__ = () def __new__(cls, a=1, b=0, c=0, d=1, tx=0, ty=0): self = super(Transform, cls).__new__(cls, a, b, c, d, tx, ty) return self
[docs] @staticmethod def identity(): """The identity transform""" return Transform(1,0,0,1,0,0)