Code for allowing offsetting in paper.js - currently using paper-jsdom

better accuracy than inkscape for offsetting

takes into account paths overlapping, when paths intersect when offset etc

Now with path stroking and variable width offsetting!

please report any bugs Known issues :

1. stroke path doesnt return valid path - paper boolean operations sometimes reverses windings, which means unite methods dont work properly
2. paths with overlapping identical curves

all code is commented, all questions and ideas welcomed

theres alot of places where code can be made better but it took me 6 months just to get all the techniques right

some parts might seem more complicated than they need to be, most often for edge cases offsetting is very tricky, floating point errors aggrigate and thus often cant use detection methods. such as curve A ends at point Z curve B starts at point Z, so when offset new Z should be the same for both but they are not :'( so then could try epsilon but then point Z can be confused with point Z for another pair of curves

So had to keep things in logicall order, and keep track of where a curve decendid from. This adds alot of complication and forces use of techniques which allow this.

Cheers

Examples - original shape in black

example type	-20 to + 20	-100 to + 100
complicated shape
shape that will self intersect
shape that will lose lines
shape with holes that will combine
shape with multiple paths that will combine

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Stroke examples

Normal stroke	Variable stroke	Inverse stroke

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