drlukeparry / pyclipr Goto Github PK

Hi,

I am having issue with polygons merging.

If a create a bunch of polygons as:

# Make a bunch of rectangles
tot = []
tot.append(np.array([[  -5., -100.],
                     [   5., -100.],
                     [   5.,  100.],
                     [  -5.,  100.]]))

tot.append(np.array([[  45., -100.],
                     [  55., -100.],
                     [  55.,  100.],
                     [  45.,  100.]]))

tot.append(np.array([[-100.,   -5.],
                     [ 100.,   -5.],
                     [ 100.,    5.],
                     [-100.,    5.]]))

tot.append(np.array([[-100.,   45.],
                     [ 100.,   45.],
                     [ 100.,   55.],
                     [-100.,   55.]]))

I obtain this:

If I "merge" the polygons to have only one left as:

# Execute the  merge
pc = pyclipr.Clipper()
pc.scaleFactor = int(1000)

pc.addPaths(tot, pyclipr.Subject)

tot = pc.execute(pyclipr.Union,
                pyclipr.FillRule.EvenOdd)

I get this:

You can remark the holes at the intersections of the polygons.
I was expected something like this:

Which is something I get by using Klayout and click on: edit -> selection -> merge

If you can help me to get the same result as with Klayout that would be really helpful.

For the prevention of name pollution of enums when importing pyclipr and preventing collision of some enum values, , the enumerations for EndType and JoinType used in offsetting operations are to be not exported into the global-scope.

Hi,

I'm currently working on a python repository about graphics rendering, and I'd like to include Clipper2 as a third party dependency. I encountered an error when running pip install pyclipr. It seemed that a distribution for python 3.12 is missing (which is the latest python version). So I manually compiled the source code following readme and it worked for me.

Whenever it's convenient, could you please make a release so that a distribution for python 3.12 is available via pypi? This will make it easier for other users using python 3.12 to install pyclipr as well. Thanks in advance!

Normals are incorrect when performing an offset using ClipperOffset using the EndType.Polygon for the added paths.