dxf splines with ezdxf (python)

[amka]

Hi,

In some weeks I will need this fix, so I wonder if :

1. I have to do ALL this : http://www.freecadweb.org/wiki/CompileOnUnix (with the bug fix in the source).
2. Is it perhaps possible to do more simple ? Will the 0.17 come please soon ?

Best regards

amka

[Kunda1]

Hi,

In some weeks I will need this fix, so I wonder if :

1. I have to do ALL this : http://www.freecadweb.org/wiki/CompileOnUnix (with the bug fix in the source).
2. Is it perhaps possible to do more simple ? Will the 0.17 come please soon ?

Best regards

amka

1. yes (when you pull from the FreeCAD git repo the fix is already in the source
2. give it a try first. 0.17 is not slated for anytime soon.

[sgrogan]

Have I then please to compile FreeCad if I want to open my dxf ?

Yes, or, wait for someone to compile for you

FreeCAD now offers occasional appimages for the development version.
Download the latest appimage (currently FreeCAD-0.17.git201703220057.glibc2.17-x86_64.AppImage) make the file executable and run FreeCAD.
https://github.com/FreeCAD/FreeCAD/rele ... g/0.17_pre

[chakkree]

Before run code, install ezdxf package to FreeCAD.
use PowerShell and change directort(cd) to ..\FreeCAD_0.17.10698_x64_dev_win\bin
and type

Code: Select all

./python -m easy_install ezdxf

Double-Click to open FreeCAD and run code.
But I'm not sure spline in dxf and BSpline in FreeCAD are the same curve.

Code: Select all

import os
import Draft
import ezdxf
from FreeCAD import Vector


filePath, fileName = os.path.split(__file__)
drawing = ezdxf.readfile(filePath+os.sep+"ezdxf_spline.dxf")

modelspace = drawing.modelspace()

splines = modelspace.query('SPLINE')
Msg('n=%d\n'% len(splines))

points=splines[0].get_fit_points()
points2 = []
for i in points:
    points2.append(Vector(i))

line = Draft.makeWire(points2,closed=False,face=False,support=None)
spline = Draft.makeBSpline(points2,closed=False,face=False,support=None)
bez = Draft.makeBezCurve(points2,closed=False,support=None)
#list(drawing.entities)

Msg('Done!\n\n')

Output.PNG (28.92 KiB) Viewed 2158 times

OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.10698 (Git)
Build type: Release
Branch: master
Hash: ac2f9f8902b67143ea081fedc9ffed86fc1a1bd3
Python version: 2.7.8
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.0.0

[Chris_G]

But I'm not sure spline in dxf and BSpline in FreeCAD are the same curve.

Draft.makeBSpline( PTS ) creates an interpolating BSpline curve that goes through the PTS.
So, in that case, PTS are not the control points of the BSplineCurve.
If you want to create a BSplineCurve from its control points, you should use :

Code: Select all

bs = Part.BSplineCurve(pts)
Part.show(bs.toShape())

[chakkree]

Dashed Line is made from Part.BSplineCurve.
It's the same makeBSpline().

Code: Select all

import os
import ezdxf
import Part
import Draft
from FreeCAD import Vector


filePath, fileName = os.path.split(__file__)
drawing = ezdxf.readfile(filePath+os.sep+"ezdxf_spline.dxf")

modelspace = drawing.modelspace()

splines = modelspace.query('SPLINE')
Msg('n=%d\n'% len(splines))

points=splines[0].get_fit_points()


line = Draft.makeWire(points,closed=False,face=False,support=None)
spline = Draft.makeBSpline(points,closed=False,face=False,support=None)
bez = Draft.makeBezCurve(points,closed=False,support=None)

bs = Part.BSplineCurve()
bs.interpolate(points,False)
Part.show(bs.toShape())

#list(drawing.entities)

Msg('Done!\n\n')

Output2.PNG (32.97 KiB) Viewed 2140 times

[amka]

Thanks you all and

FreeCAD now offers occasional appimages for the development version.
Download the latest appimage (currently FreeCAD-0.17.git201703220057.glibc2.17-x86_64.AppImage) make the file executable and run FreeCAD.
https://github.com/FreeCAD/FreeCAD/rele ... g/0.17_pre

Do you please know where I can find such a freecad for linux ?

[sgrogan]

Do you please know where I can find such a freecad for linux ?

From my previous link this, file Direct Link to .AppImage Download

Code: Select all

https://github.com/FreeCAD/FreeCAD/releases/download/0.17_pre/FreeCAD-0.17.git201703220057.glibc2.17-x86_64.AppImage

[amka]

Thanks, this Freecad works !

[amka]

Thank you a lot for these informations !

Before run code, install ezdxf package to FreeCAD.
use PowerShell and change directort(cd) to ..\FreeCAD_0.17.10698_x64_dev_win\bin
and type

Code: Select all

./python -m easy_install ezdxf

And where have I to do this ? I did :

Code: Select all

root@debian:/usr/lib/freecad/bin# ls -l
total 48
-rwxr-xr-x 1 root root 28368 mai 22  2016 FreeCAD
-rwxr-xr-x 1 root root 17256 mai 22  2016 FreeCADCmd
root@debian:/usr/lib/freecad/bin# python -m easy_install ezdxf
Searching for ezdxf
Best match: ezdxf 0.8.1
Adding ezdxf 0.8.1 to easy-install.pth file

Using /usr/local/lib/python2.7/dist-packages
Processing dependencies for ezdxf
Finished processing dependencies for ezdxf

My FreeCAD version is 0.16. Perhaps it is possible to do the same with the appimage (version 0.17) of the post before ?

Double-Click to open FreeCAD and run code.
But I'm not sure spline in dxf and BSpline in FreeCAD are the same curve.

Code: Select all

import os
import ezdxf
from FreeCAD import Vector


filePath, fileName = os.path.split(__file__)
drawing = ezdxf.readfile(filePath+os.sep+"ezdxf_spline.dxf")

modelspace = drawing.modelspace()

splines = modelspace.query('SPLINE')
Msg('n=%d\n'% len(splines))

points=splines[0].get_fit_points()
points2 = []
for i in points:
    points2.append(Vector(i))

line = Draft.makeWire(points2,closed=False,face=False,support=None)
spline = Draft.makeBSpline(points2,closed=False,face=False,support=None)
bez = Draft.makeBezCurve(points2,closed=False,support=None)
#list(drawing.entities)

Msg('Done!\n\n')

Can you please explain me where to put this code ? I don't understand.

Regards