[FIXED] How to get "xy" of a transformed polygon

Issue

poly is a given polygon.

>>> from matplotlib.figure import Figure
>>> import matplotlib as mpl
>>> fig = Figure(figsize=(10, 8))
>>> ax = fig.add_subplot()
>>> ax.add_patch(poly)
>>> poly
<matplotlib.patches.Polygon object at 0x7fbf5f313a90>
>>> poly.xy
array([[ 24.56, -32.63],
       [ 30.36,  -7.01],
       [ 24.56, -32.63]])
>>> t = mpl.transforms.Affine2D().translate(2, 2)
>>> poly.set_transform(t + ax.transData)
>>> poly.xy
array([[ 24.56, -32.63],
       [ 30.36,  -7.01],
       [ 24.56, -32.63]])
>>> 

The polygon has been transformed, but it does not affect its xy attribute.

How can I get the xy of the transformed polygon?

Solution

Emilio drive me on the good track. But poly.get_transform() seems to be different than the transformation itself.

The correct answer is: t.transform(poly.xy)

Answered By - albar