[ot][spam][crazy][is it appropriate to direct disruption towards things that have been heavily disrupted?]

[Undiscussed Horrific Abuse, One Victim of Many]

so i have this, but i don't like the name "destranform" and how the
operation of a transform brings something _out_ of the space.  maybe
I'll change it to be something positive like "apply" or "__call__" and
just remember how to use it or write in the comment how:

class CoordFrame:
    def __init__(self, mat = None):
        if mat is None:
            mat = np.array([1.0,0,0,0],[0,1.0,0,0],[0,0,1.0,0],[0,0,0,1.0])
        self.mat = mat
    def detransform(self, vec):
        return self.mat @ vec
    def inverted(self):
        return CoordFrame(self.mat.inverse())

# to move into camera space, call cameraframe.inverted().detransform(vector)