path xxxAtTime functions assume segments are equal length

[dustismo]

Hello,

First of all, thank you for this library! I am using to reimplement (heavyfishdesign.com) in python.

I believe I have come across a bug, (or at least an undocumented assumption).

beziers.py/beziers/path/__init__.py

Line 324 in c42026a

def pointAtTime(self,t):

Seems to assume that each segment along the path is equally spaced. for instance the path:

M 0.000 0.000 L 1.000 0.000 L 2.000 0.000 L 3.000 0.000 L 10.000 0.000

at t= .7 yields 2.8

Thanks again, and I can probably fix it and do a PR, but wanted to make sure I am not misunderstanding the intent of these methods

[simoncozens]

Hi! Good to hear that the library is being useful for you! Yeah, that definitely looks like a bug. If you're happy to fix and PR I'd be very happy to merge it. Thanks!

[dustismo]

Ok, great. Additionally: test_path.py fails for me from master, is that expected? I can work through it, but I'm trying to figure out if it is my environment or something else.

[dustismo]

Looks like the precision change in _curve_curve_intersections_t broke various tests. From my understanding so far, it seems that the lower precision is causing 2X the number of intersections. I'm still looking for the cause