Cannot get the intersection between two Bezier Curves

[leviethung2103]

Currently, I cannot get the intersection between two Bezier Curevs.

from svgpathtools import parse_path
path1 = parse_path("M52.75,10.1c1.14,1.14,1.81,2.53,1.81,4.18c0,4.21-0.06,5.09-0.06,7.72")
path2 = parse_path("M18.25,25.04c3.5,0.71,5.92,0.75,9.11,0.39c13.77-1.55,40.1-3.75,54.65-4.35c2.83-0.12,6.3-0.22,9,0.78")
path1.intersect(path2)

This program returns empty list

Here is the image of two paths

[mathandy]

I think there's no intersection -- it just looks that way cause of the thickness. Try

from svgpathtools import parse_path, disvg
path1 = parse_path("M52.75,10.1c1.14,1.14,1.81,2.53,1.81,4.18c0,4.21-0.06,5.09-0.06,7.72")
path2 = parse_path("M18.25,25.04c3.5,0.71,5.92,0.75,9.11,0.39c13.77-1.55,40.1-3.75,54.65-4.35c2.83-0.12,6.3-0.22,9,0.78")
disvg([path1, path2])

[leviethung2103]

Thank you for your answer. I think the main problem here is at stroke width. Can we set the stroke width to 2 or 3 and then find the intersection between two paths ?

Thank you in advance.

[mathandy]

svgpathtools doesn't have feature to do that. It's mostly designed for analysis of the curves themselves (with little consideration given to stroke width). You could make the two curves different colors and rasterize (e.g. save as a PNG). Then it would just be a matter of looking for red pixels that are next to green pixels (or whatever colors you used).

You might also be interested in the Path.radialrange() method, which can be used to find the nearest point in one path to another path. There's an example here: https://github.com/mathandy/svgpathtools/blob/master/examples/distance-between-two-svg-paths-example.py