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A Python library to create DXF R12 drawings.

Project description

dxfwrite

Abstract

A Python library to create DXF R12 drawings.

a simple example:

from dxfwrite import DXFEngine as dxf
drawing = dxf.drawing('test.dxf')
drawing.add(dxf.line((0, 0), (10, 0), color=7))
drawing.add_layer('TEXTLAYER', color=2)
drawing.add(dxf.text('Test', insert=(0, 0.2), layer='TEXTLAYER')
drawing.save()

supported DXF R12 entities

  • ARC
  • ATTDEF
  • ATTRIB
  • BLOCK
  • CIRCLE
  • 3DFACE
  • INSERT
  • LINE
  • POINT
  • POLYLINE (special Polyface and Polymesh objects are available)
  • SHAPE (not tested)
  • SOLID
  • TRACE
  • TEXT
  • VERTEX (only for internal use, see Polyline, Polyface and Polymesh objects)

not supported DXF R12 entities

  • DIMENSION

emulated entities from DXF R13 and later

  • MTEXT (R13) … emulated as composite entity MText
  • ELLIPSE (R13) … approximated by Ellipse
  • SPLINE (R13) … approximated by Spline
  • LWPOLYLINE (R13) … use POLYLINE
  • TABLE (R2005) … emulated as composite entity Table

composite entities

  • MText – multi line text
  • LinearDimension
  • AngularDimension
  • ArcDimension
  • RadialDimension
  • Table – text and blockrefs containing table like a HTML-table
  • Ellipse – approximated as POLYLINE
  • Spline – cubic spline curve through breakpoints without additional control points, approximated as POLYLINE
  • Bezier – cubic bezier curve through breakpoints with additional control points, approximated as POLYLINE
  • Clothoid – Euler spiral, approximated as POLYLINE

read/write AutoCAD ctb-files

The module acadctb provides the ability to read and write AutoCAD ctb-files. With ctb-files you can assign a new color or lineweight to a dxf-color-index for plotting or printing, but this has to be supported by the used application.

a simple example:

from dxfwrite import acadctb
ctb = acadctb.load('test.ctb')
style1 = ctb.get_style(1) # dxf color index (1 .. 255)
style1.set_color(23, 177, 68) # set rgb values (0..255)
style1.set_lineweight(0.7)
ctb.save('new.ctb')

Installation

with easy_install:

easy_install dxfwrite

with pip:

pip install dxfwrite

or from source:

python setup.py install

Documentation

http://packages.python.org/dxfwrite/

Good Luck! Feedback is greatly appreciated.

Manfred

mozman@gmx.at

dxfwrite can be found on bitbucket.org at:

http://bitbucket.org/mozman/dxfwrite

News

Version 1.0.1 - 26 March 2011

  • added easy usage of modelspace/paperspace, see examples/paperspace.py
  • BUGFIX: removed dict-comprehension in module htmlcolors.py for backward-compatibility to Python 2.5 and 2.6, works with pypy 1.4.1

Version 1.0.0 - 11 March 2011

  • changed: set DXF Header variables now looks like dwg.header[‘$VAR’] = value, see http://packages.python.org/dxfwrite/headervars.html
  • splitted makedxfexamples.py into several files and moved them into the subdir ‘examples’
  • curves.Ellpise: radiusx -> rx; radiusy -> ry
  • moved documentation to: http://packages.python.org/dxfwrite, and using Sphinx (http://sphinx.pocoo.org)
  • tested with Python 3.2 - OK
  • further compatibility-tests only for CPython 2.7 & CPython 3.2+
  • added Drawing.add_xref(filename), for usage see examples/xref.py
  • adding relative attributes by Insert.add() concidering the xy-scaling
  • added Howtos section to documentation

Version 0.3.6 - 14 November 2010

  • moved dxfwrite.drawing.ENCODING to class Drawing
  • Python 3.1 support

Version 0.3.5 - 10 September 2010

  • new: package and tests run with Python 2.7

Version 0.3.4 - 29 August 2010

  • status: 5 - Production/Stable
  • new: package and tests run with Python 2.5 (tests need unittest2)

Version 0.3.3 - 27 April 2010

  • BUGFIX: makedxfexamples.py - attdef keyword error

Version 0.3.2 - 27 April 2010

  • BUGFIX: Drawing.__dxf__() - StringIO() does not support ‘with’ statement

Version 0.3.1 - 24 April 2010

  • new: insert2, insert block reference with automatic attrib filling
  • changed interface for DXFEngine.attrib()

Version 0.3.0b1 - 28 March 2010

  • new: subpackage algebra: circle, ray, clothoid, cspline, bezier (27.03.2010)
  • new: Spline, Bezier, Clothoid and Ellipse - curves (27.03.2010)
  • new: acadctb.py to read, write and create AutoCAD ctb-files (25.03.2010)
  • splitted buildups.py into mtext.py and rect.py

Version 0.2.0 - 21 March 2010

  • Alpha status - api may change

Version 0.1.0 - 14 March 2010

  • Pre-Alpha status
  • Initial release

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