Boolean path operations

[onlymega]

Is it possible to add boolean operations like Union, Xor, Difference for path?

Here is a link to the JS library that supports this operations:
http://jsclipper.sourceforge.net/6.1.3.2/main_demo.html

Second library:
https://github.com/poilu/raphael-boolean

[jarek-foksa]

As of 2016, Paper.js has the most advanced implementation of boolean operations. Raphael does not support all the edge cases, while Clipper can output only polygons.

[codedread]

I'm not 100% certain but I seem to remember that its license was not
compatible.

On Tue, Jun 28, 2016, 10:01 AM Jarek Foksa notifications@github.com wrote:

As of 2016, Paper.js has the most advanced and reliable implementation of
boolean operations.

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[jarek-foksa]

@codedread Paper.js is released under MIT license.

[nicholaswmin]

FWIW Paper.js boolean operations are intrinsically connected with it's own Path implementation - not a breeze in the park to prune out BoolOps and plug them in svg-edit, see: paperjs/paper.js#1325 (comment)

As for the second library, raphael-boolean, it is really not a reliable solution. I don't have any test cases that fail at the moment but I've gave that lib a test run back in 2014 and it failed in any non-trivial shape combination. Hasn't been updated since

An alternative could be Javascript Clipper which handles nearly all shape configurations with the sole problem that it deals with Polygons instead of Bezier curves. It's fairly straightforward to "polygonise" a curve before performing BoolOps on it - the result would be a polygon nonetheless - it can be turned back to curves by doing some kind of curve fitting over the result - but that would distort the original curve handle positions etc and it sounds like really dirty business.

IMO, best bet would be to port Paper's BoolOps code

[jarek-foksa]

@nicholaswmin Paper's Path can be easily constructed from SVG path and later serialized back to SVG. The main drawback would be the size of Paper.js library which contains a lot of code unrelated to the boolean operations.

[nicholaswmin]

@jarek-foksa

Paper's Path can be easily constructed from SVG path

That's definitely one way to do it

The main drawback would be the size of Paper.js library

We could defer/async Paper.js lib so it doesn't impact the load time

Do this as a "stopgap" perhaps?

[yisibl]

Is there any progress?