Get coordinates of points in polyline

[Juju77]

Hello everybody,

I search to obtain the 3D coordinates of all points that make my polyline :

ex: polyline1 : point1 (start) XY / point2 XY / point3  XY / ... / pointN (end) XY

I find a code to do this but it's for LINE and for a POLYLINE, the dxf.start crashes..

Can you help me please ! 

[Manfred Moitzi]

If you know which DXF entity you wanna examine, look at the ezdxf reference for available attributes and methods:

https://ezdxf.mozman.at/docs/reference.html#entities

Link to the POLYLINE entity: https://ezdxf.mozman.at/docs/dxfentities/polyline.html

There you will find the Polyline.points() method: Iterate over all polyline points as (x, y[, z])-tuples, not as Vertex objects.

import ezdxf

dwg = ezdxf.readfile('your_dxf_file.dxf')

msp = dwg.modelspace()

# get all POLYLINE entities from model space

polylines = msp.query('POLYLINE')

for polyline in polylines:

    print('Polyline #{}'.format(polyline.dxf.handle))

    for i, location in enumerate(polyline.points()):

        print('Point at index {}: {}'.format(i, location))

Hint: most application using the LWPOLYLINE entity for 2D polylines.

Best Regards,

Manfred

[Juju77]

Hey, Yes well it runs perfectly!! 

I'm searching the same method to extract the coordinates of POINTS and POLYGON now and I will have the begining to build my script !

If you have some idea, I'm ready to explore them! :)

Thanks

[Juju77]

For 'POINT', I use point.dxf.location and it's ok ! :) 

I explore to get 'POLYGON' entities now !

Le vendredi 27 juillet 2018 11:40:37 UTC+2, Juju77 a écrit :

[Manfred Moitzi]

There exist not DXF entity POLYGON, I assume POLYGONS are implemented as closed POLYLINES.

[Juju77]

Yes we can say that polygons are closed by polylines, but in AutoCAD, I use the Polygon tool .. 

So How we can resolve the problem ? Have you got an idea ? :/ I search also !

Le vendredi 27 juillet 2018 11:40:37 UTC+2, Juju77 a écrit :