Metadata-Version: 2.1
Name: ezdxf
Version: 0.18b4
Summary: A Python package to create/manipulate DXF drawings.
Home-page: https://ezdxf.mozman.at
Author: Manfred Moitzi
Author-email: me@mozman.at
License: MIT License
Download-URL: https://pypi.org/project/ezdxf/
Keywords: DXF,CAD
Platform: OS Independent
Classifier: Development Status :: 5 - Production/Stable
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Intended Audience :: Developers
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Provides: ezdxf
Requires-Python: >=3.7
Description-Content-Type: text/markdown
Provides-Extra: draw
Provides-Extra: draw5
Provides-Extra: test
Provides-Extra: dev
Provides-Extra: all
Provides-Extra: all5
License-File: LICENSE


ezdxf
=====

Abstract
--------

A Python package to create and modify DXF drawings, independent of the DXF
version. You can open/save every DXF file without losing any content (except comments),
Unknown tags in the DXF file will be ignored but preserved for saving. With this behavior
it is possible to open also DXF drawings that contains data from 3rd party applications.

Quick-Info
----------

- ezdxf is a Python package to create new DXF files and read/modify/write existing DXF files
- the intended audience are programmers
- requires at least Python 3.7
- OS independent
- tested with CPython and pypy3
- C-extensions for CPython as binary wheels available on PyPI for Windows, Linux and macOS
- additional required packages: 
  [typing_extensions](https://pypi.org/project/typing-extensions/), 
  [pyparsing](https://pypi.org/project/pyparsing/) 
- optional Cython implementation of some low level math classes
- MIT-License
- read/write/new support for DXF versions: R12, R2000, R2004, R2007, R2010, R2013 and R2018
- additional read support for DXF versions R13/R14 (upgraded to R2000)
- additional read support for older DXF versions than R12 (upgraded to R12)
- read/write support for ASCII DXF and Binary DXF
- preserves third-party DXF content

Included Extensions
-------------------

- The `drawing` add-on is a translation layer to send DXF data to a render backend, interfaces to 
  [matplotlib](https://pypi.org/project/matplotlib/), which can export images as png, pdf or svg, 
  and [PyQt5](https://pypi.org/project/PyQt5/) are implemented.
- `geo` add-on to support the [`__geo_interface__`](https://gist.github.com/sgillies/2217756)
- `r12writer` add-on to write basic DXF entities direct and fast into a DXF R12 file or stream
- `iterdxf` add-on to iterate over DXF entities of the modelspace of really big (> 5GB) DXF files which
  do not fit into memory
- `Importer` add-on to import entities, blocks and table entries from another DXF document
- `dxf2code` add-on to generate Python code for DXF structures loaded from DXF 
  documents as starting point for parametric DXF entity creation
- `acadctb` add-on to read/write plot style files (CTB/STB)
- `pycsg` add-on for Constructive Solid Geometry (CSG) modeling technique
- `MTextExplode` add-on for exploding MTEXT entities into single line TEXT entities 

A simple example:

```Python
import ezdxf

# Create a new DXF document.
doc = ezdxf.new(dxfversion="R2010")

# Create new table entries (layers, linetypes, text styles, ...).
doc.layers.add("TEXTLAYER", color=2)

# DXF entities (LINE, TEXT, ...) reside in a layout (modelspace, 
# paperspace layout or block definition).  
msp = doc.modelspace()

# Add entities to a layout by factory methods: layout.add_...() 
msp.add_line((0, 0), (10, 0), dxfattribs={"color": 7})
msp.add_text(
    "Test", 
    dxfattribs={
        "layer": "TEXTLAYER"
    }).set_pos((0, 0.2), align="CENTER")

# Save the DXF document.
doc.saveas("test.dxf")
```

Example for the *r12writer*, which writes a simple DXF R12 file without 
in-memory structures:

```Python
from random import random
from ezdxf.addons import r12writer

MAX_X_COORD = 1000
MAX_Y_COORD = 1000

with r12writer("many_circles.dxf") as doc:
    for _ in range(100000):
        doc.add_circle((MAX_X_COORD*random(), MAX_Y_COORD*random()), radius=2)
```

The r12writer supports only the ENTITIES section of a DXF R12 drawing, no HEADER, 
TABLES or BLOCKS section is present, except FIXED-TABLES are written, than some 
additional predefined text styles and line types are available.

Installation
------------

Basic installation by pip including the optional C-extensions from PyPI as 
binary wheels:

    pip install ezdxf

Full installation with all dependencies (matplotlib, PyQt5) to use the 
drawing add-on:

    pip install ezdxf[draw]

For more information about the setup & dependencies visit the 
[documentation](https://ezdxf.mozman.at/docs/setup.html).

Website
-------

https://ezdxf.mozman.at/

Documentation
-------------

Documentation of development version at https://ezdxf.mozman.at/docs

Documentation of the latest release at https://ezdxf.readthedocs.io/

Contribution
------------

The source code of *ezdxf* can be found at __GitHub__, target your pull requests 
to the `master` branch:

https://github.com/mozman/ezdxf.git


Feedback
--------

Questions and feedback at __GitHub Discussions__:

https://github.com/mozman/ezdxf/discussions

Questions at __Stack Overflow__:

Post questions at [stack overflow](https://stackoverflow.com/) and use the tag `dxf` or `ezdxf`.

Issue tracker at __GitHub__:

http://github.com/mozman/ezdxf/issues

Contact
-------

Please __always__ post questions at the [forum](https://github.com/mozman/ezdxf/discussions) 
or [stack overflow](https://stackoverflow.com/) to make answers 
available to other users as well. 

ezdxf@mozman.at

Feedback is greatly appreciated.

Manfred

News
====

Version 0.18b4 - dev
--------------------

- Release notes: https://ezdxf.mozman.at/release-v0-18.html
- NEW: angular dimension rendering support, new factory methods:
  `add_angular_dim_2l()`, `add_angular_dim_3p()`, `add_angular_dim_cra()`, 
  `add_angular_dim_arc()` 
- NEW: arc length dimension rendering support, new factory methods: 
  `add_arc_dim_3p()`, `add_arc_dim_cra()`, `add_arc_dim_arc()`
- NEW: ordinate dimension rendering support, new factory methods: 
  `add_ordinate_dim()`, `add_ordinate_x_dim()`, `add_ordinate_y_dim()`
- NEW: extended query functionality for the `EntityQuery` class
- NEW: function `ezdxf.tools.text.is_upside_down_text_angle()` in WCS
- NEW: function `ezdxf.tools.text.upright_text_angle()` in WCS
- NEW: helper class `ezdxf.math.ConstructionPolyline` to measure, interpolate and 
  divide polylines and anything that can be approximated or flattened into 
  vertices
- NEW: approximation tool for parametrized curves: `ezdxf.math.ApproxParamT()`
- NEW: `BoundingBox(2d).intersection(other)`, returns the 3D/2D bbox of the intersection space
- NEW: `BoundingBox(2d).has_intersection(other)` replaces deprecated method `intersect()` 
- NEW: `BoundingBox(2d).has_overlap(other)` replaces deprecated method `overlap()` 
- DEPRECATED: method `BoundingBox(2d).intersect()` will be removed in v1.0.0
- DEPRECATED: method `BoundingBox(2d).overlap()` will be removed in v1.0.0
- CHANGE: `BoundingBox(2d).is_empty` is `True` for bounding boxes with a size 
  of 0 in any dimension or has no data
- NEW: `ezdxf.gfxattribs.GfxAttribs()` class, [docs](https://ezdxf.mozman.at/docs/tools/gfxattribs.html)
- NEW: `TextEntityAlignment` enum replaces the string based alignment definition
- NEW: method `Text.get_placement()`, replaces `get_pos()` 
- NEW: method `Text.set_placement()`, replaces `set_pos()` 
- NEW: method `Text.get_align_enum()`, replaces `get_align()`
- NEW: method `Text.set_align_enum()`, replaces `set_align()`
- NEW: virtual DXF attribute `MText.dxf.text`, adds compatibility to other text 
  based entities: `TEXT, ATTRIB, ATTDEF`
- NEW: command `ezdxf info FILE [FILE ...]`, show info and optional stats of DXF files
- NEW: module `ezdxf.appsettings`, [docs](https://ezdxf.mozman.at/docs/appsettings.html)
- NEW: module `ezdxf.addons.binpacking`, a simple solution for the bin-packing problem 
  in 2D and 3D, [docs](https://ezdxf.mozman.at/docs/addons/binpacking.html)
- NEW: arguments `height` and `rotation`for factory methods `add_text()` and `add_attdef()`
- NEW: argument `size_inches` in function `ezdxf.addons.drawing.matplotlib.qsave()`
- NEW: DXF/DWG converter function `ezdxf.addons.odafc.convert()`
- NEW: support for layer attribute override in VIEWPORT entities
- NEW: mesh exchange add-on `ezdxf.addons.meshex`: STL, OFF, and OBJ mesh loader 
  and STL, OFF, OBJ, PLY, OpenSCAD and IFC4 mesh exporter
- CHANGE: keyword only argument `dxfattribs` for factory methods `add_text()` and `add_attdef()`
- CHANGE: `recover` module - recovered integer and float values are logged as severe errors
- CHANGE: method `Path.all_lines_to_curve3` replaced by function `path.lines_to_curve3()`
- CHANGE: method `Path.all_lines_to_curve4` replaced by function `path.lines_to_curve4()`
- BUGFIX [#663](https://github.com/mozman/ezdxf/issues/663): 
  improve handling of large coordinates in `Bezier4P` and `Bezier3P` classes
- BUGFIX [#655](https://github.com/mozman/ezdxf/issues/655): 
  fixed invalid flattening of 3D ARC entities 
- BUGFIX [#640](https://github.com/mozman/ezdxf/issues/640): 
  DXF loader ignore data beyond `EOF` tag 
- BUGFIX [#620](https://github.com/mozman/ezdxf/issues/620): 
  add missing caret decoding to `fast_plain_mtext()` 

Version 0.17.2 - 2022-01-06
---------------------------

- NEW: extended binary wheels support
  - `manylinux2010_x86_64` for Python < 3.10 and `manylinux2014_x86_64` 
    for Python >= 3.10 
  - `musllinux_2010_x86_64` for Python < 3.10 and `musllinux_2014_x86_64` 
    for Python >= 3.10
  - `manylinux_2014_aarch64` for ARM64 based Linux
  - `musllinux_2014_aarch64` for ARM64 based Linux
  - `macosx_11_0_arm64` for Apple silicon
  - `macosx_10_9_universal2` for Apple silicon & x86
- NEW: Auditor fixes invalid transparency values
- NEW: Auditor fixes invalid crease data in `MESH` entities
- NEW: add `transparency` argument to `LayerTable.add()`
- NEW: support for transparency `BYLAYER` and `BYBLOCK` for the `drawing` add-on
- NEW: `Textstyle.make_font()` returns the ezdxf font abstraction
- NEW: added `dxfattribs` argument to method `Drawing.set_modelspace_vport()`
- NEW: `ezdxf.math.split_bezier()` function to split Bezier curves of any degree
- NEW: `ezdxf.math.intersection_line_line_3d()`
- NEW: `ezdxf.math.intersect_poylines_2d()`
- NEW: `ezdxf.math.intersect_poylines_3d()`
- NEW: `ezdxf.math.quadratic_bezier_from_3p()`
- NEW: `ezdxf.math.cubic_bezier_from_3p()`
- NEW: `BoundingBox.contains()`, check if a bounding box contains completely 
  another bounding box
- NEW: `TextEntityAlignment` enum replaces the string based alignment definition
- NEW: method `Text.get_placement()`, replaces `get_pos()` 
- NEW: method `Text.set_placement()`, replaces `set_pos()` 
- NEW: method `Text.get_align_enum()`, replaces `get_align()`
- NEW: method `Text.set_align_enum()`, replaces `set_align()`
- DEPRECATED: method `Text.get_pos()` will be removed in v1.0.0
- DEPRECATED: method `Text.set_pos()` will be removed in v1.0.0
- DEPRECATED: method `Text.get_align()` will be removed in v1.0.0
- DEPRECATED: method `Text.set_align()` will be removed in v1.0.0
- CHANGE: moved enum `MTextEntityAlignment` to `ezdxf.enums`
- CHANGE: moved enum `MTextParagraphAlignment` to `ezdxf.enums`
- CHANGE: moved enum `MTextFlowDirection` to `ezdxf.enums`
- CHANGE: moved enum `MTextLineAlignment` to `ezdxf.enums`
- CHANGE: moved enum `MTextStroke` to `ezdxf.enums`
- CHANGE: moved enum `MTextLineSpacing` to `ezdxf.enums`
- CHANGE: moved enum `MTextBackgroundColor` to `ezdxf.enums`
- CHANGE: `Dimstyle.set_tolerance()`: argument `align` as enum `MTextLineAlignment`
- CHANGE: `DimstyleOverride.set_tolerance()`: argument `align` as enum `MTextLineAlignment`
- CHANGE: `MeshData.add_edge()` is changed to `MeshData.add_edge_crease()`, 
  this fixes my misunderstanding of edge and crease data in the `MESH` entity.  
- BUGFIX [#574](https://github.com/mozman/ezdxf/issues/574):
  flattening issues in `Path()` and `ConstructionEllipse()` 
- BUGFIX: `drawing` add-on shows block references in `ACAD_TABLE` at the 
  correct location
- BUGFIX [#589](https://github.com/mozman/ezdxf/issues/589):
  `Polyface.virtual_entities()` yields correct triangle faces
- BUGFIX: prevent invalid DXF export of the `MESH` entity  
- PREVIEW: arc length dimension rendering support, new factory methods: 
  `add_arc_dim_3p()`, `add_arc_dim_cra()`, `add_arc_dim_arc()`
- PREVIEW: ordinate dimension rendering support, new factory methods: 
  `add_ordinate_dim()`, `add_ordinate_x_dim()`, `add_ordinate_y_dim()`
- PREVIEW: `ezdxf.gfxattribs.GfxAttribs()` class, [docs](https://ezdxf.mozman.at/docs/tools/gfxattribs.html)
- PREVIEW: command `ezdxf info FILE [FILE ...]`, show info and optional stats of DXF files
- PREVIEW: approximation tool for parametrized curves: `ezdxf.math.ApproxParamT()`

Version 0.17.1 - 2021-11-14
---------------------------

- CHANGE: using [PySide6](https://pypi.org/project/PySide6/) as Qt binding 
  if installed, `PyQt5` is still supported as fallback
- NEW: tracking feature for DXF entity copies, new properties of `DXFEntity`
  - `source_of_copy` - the immediate source of an entity copy
  - `origin_of_copy` - the first non virtual source entity of an entity copy
  - `is_copy` - is `True` if the entity is a copy
- NEW: source entity tracking for virtual sub-entities for:
  `POINT`, `LWPOLYLINE`, `POLYLINE`, `LEADER`, `MLINE`, `ACAD_PROXY_ENTITY` 
- NEW: source block reference tracking for virtual entities created from block 
  references, new properties of `DXFEntity`
  - `has_source_block_reference` - is `True` if the virtual entity was created 
    by a block reference
  - `source_block_reference` - the immediate source block reference (`INSERT`), 
    which created the virtual entity, otherwise ``None``
- NEW: `ezdxf.tools.text_size` module to measure `TEXT` and `MTEXT` entity dimensions
- CHANGE: `--ltype` arguments of the `draw` command  to `approximate` and `accurate`
  to be in sync with the `drawing` add-on configuration.
- CHANGE: `--ltype` arguments of the `view` command  to `approximate` and `accurate`
  to be in sync with the `drawing` add-on configuration.
- REMOVE `--scale` argument of the `view` command
- REMOVE: `PolylinePath.PATH_TYPE`, use `PolylinePath.type` instead
- REMOVE: `EdgePath.PATH_TYPE`, use `EdgePath.type` instead
- BUGFIX: invalid XDATA processing in `XData.safe_init()` 
- BUGFIX: group code 1003 is valid in XDATA section 
- BUGFIX: fix loading error of `DIMSTYLE` attribute `dimtxsty` 
- BUGFIX: fix "Next Entity" and "Previous Entity" actions in the `browse` command 
- BUGFIX: export `MTEXT` entities with column count different than the count of 
  linked `MTEXT` entities 
- BUGFIX: fix invalid text rotation for relative text shifting for linear dimensions
- PREVIEW: angular dimension rendering support, new factory methods: 
  `add_angular_dim_2l()`, `add_angular_dim_3p()`, `add_angular_dim_cra()` 
- PREVIEW: helper class `ezdxf.math.ConstructionPolyline` to measure, interpolate and 
  divide polylines and anything that can be approximated or flattened into 
  vertices

Version 0.17 - 2021-10-01
-------------------------

- Release notes: https://ezdxf.mozman.at/release-v0-17.html
- NEW: column support for MTEXT read and create, but no editing
- NEW: factory method `BaseLayout.add_mtext_static_columns()`
- NEW: factory method `BaseLayout.add_mtext_dynamic_manual_height_columns()`
- NEW: add-on tool `MTextExplode()` to explode MTEXT entities
  into single line TEXT entities and additional LINE entities to emulate 
  strokes, requires the `Matplotlib` package
- NEW: `move_to()` command and multi-path support for the `ezdxf.path.Path` class 
- NEW: regular `make_path()` support for the HATCH entity, returns a multi-path object  
- NEW: regular `make_primitive()` support for the HATCH entity  
- NEW: `text2path.make_path_from_str()` returns a multi-path object  
- NEW: `text2path.make_path_from_enity()` returns a multi-path object  
- NEW: `MPOLYGON` load/write/create support
- NEW: `ezdxf.path.to_mpolygons()` function: Path() to MPOLYGON converter
- NEW: `ezdxf.path.render_mpolygons()` function: render MPOLYGON entities form paths
- NEW: store *ezdxf* and custom metadata in DXF files
- NEW: command `ezdxf browse FILE ...`, PyQt DXF structure browser
- NEW: `dxf2code` add-on: function `black()` and method `Code.black_code_str()` 
  returns the code string formatted by [Black](https://pypi.org/project/black/)
- NEW: `ezdxf.upright` module to flip inverted extrusion vectors, for more 
  information read the [docs](https://ezdxf.mozman.at/docs/upright.html)  
- NEW: support for `ACAD_PROXY_ENTITY`
- NEW: `BaseLayout.add_mtext_static_columns()`
- NEW: `BaseLayout.add_mtext_dynamic_manual_height_columns()`
- NEW: rendering support for inline codes in `MTEXT` entities for the `drawing`
  add-on
- NEW: `XDATA` transformation support
- NEW: copy support for extension dictionaries
- CHANGE: `drawing` add-on: replaced the backend `params` argument (untyped dict) 
  by the new typed `Configuration` object passed to the frontend class as 
  argument `config`
- REMOVED: deprecated class methods `from_...(entity)` from `Path` class, 
  use `path.make_path(entity)` instead
- REMOVED: deprecated `Path` methods `add_...(entity)`, 
  use `path.add_...(path, entity)` function instead
- BUGFIX: entity query did not match default values if the attribute was not present
- BUGFIX: groupby query did not match default values if the attribute was not present
- BUGFIX: ODAFC add-on - reintroduce accidentally removed global variable `exec_path` as `win_exec_path` 
- BUGFIX: graphic entities are not allowed as `DICTIONARY` entries 
- BUGFIX: copied `DICTIONARY` was not added to the OBJECTS section by calling `factory.bind()`
- BUGFIX: `XRecord.copy()` copies content tags

Version 0.16.6 - 2021-08-28
---------------------------

- NEW: `MPOLYGON` support for the `drawing` add-on
- NEW: `MPOLYGON` support for the `geo` add-on
- NEW: `fast` argument for method `MText.plain_text()`
- NEW: support for multi-line `ATTRIB` and `ATTDEF` entities in DXF R2018 
- NEW: `Auditor` removes invalid DXF entities from layouts, blocks and the 
  OBJECTS section
- NEW: `Auditor` removes standalone ATTRIB entities from layouts and blocks
- NEW: `Drawing.layers.add()` factory method to create new layers
- NEW: `Drawing.styles.add()` factory method to create new text styles
- NEW: `Drawing.linetypes.add()` factory method to create new line types
- CHANGE: renamed `RenderContext.current_layer` to `RenderContext.current_layer_properties` 
- CHANGE: renamed `RenderContext.current_block_reference` to `RenderContext.current_block_reference_properties` 
- CHANGE: extended entity validation for `GROUP`
- REMOVED: `BaseLayout.add_attrib()` factory method to add standalone `ATTRIB` 
  entities. `ATTRIB` entities cannot exist as standalone entities.
- BUGFIX: add missing "doc" argument to DXF loaders, DXF version was not 
  available at loading stage 
- BUGFIX: DXF export for `ARC_DIMENSION`
- BUGFIX: `Arc.flattening()` always have to return `Vec3` instances
- PREVIEW: new features to try out, API may change until official release in v0.17
- PREVIEW: support for `ACAD_PROXY_ENTITY`
- PREVIEW: Rendering support for inline codes in `MTEXT` entities for the `drawing` add-on.

Version 0.16.5 - 2021-07-18
---------------------------

- NEW: hard dependency `typing_extensions`
- CHANGE: replaced `ezdxf.tools.rgb` by `ezdxf.colors`
- CHANGE: `options` module renamed to `_options`; this eliminates the confusion 
  between the `options` module and the global object `ezdxf.options`
- NEW: config file support, see [docs](https://ezdxf.mozman.at/docs/options.html#config-files)
- NEW: `ezdxf config` command to manage config files
- NEW: `ezdxf.path.have_close_control_vertices(a, b)`, test for close control 
  vertices of two `Path` objects
- REMOVED: environment variable options, these are config file only options:
  - `EZDXF_AUTO_LOAD_FONTS`
  - `EZDXF_FONT_CACHE_DIRECTORY`
  - `EZDXF_PRESERVE_PROXY_GRAPHICS`
  - `EZDXF_LOG_UNPROCESSED_TAGS`
  - `EZDXF_FILTER_INVALID_XDATA_GROUP_CODES`
- REMOVED: `ezdxf.options.default_text_style`, was not used  
- REMOVED: `ezdxf.options.auto_load_fonts`, disabling auto load has no advantage
- REMOVED: `Vector` alias for `Vec3`
- REMOVED: `get_acis_data()`, `set_acis_data()` and context manager `edit_data()` 
  from ACIS based entities, use `acis_data` property instead as `List[str]` or 
  `List[bytes]`  
- BUGFIX: `Spline.construction_tool()` recognizes start- and end tangents for 
  B-splines from fit points if defined  
- PREVIEW: new features to try out, API may change until official release in v0.17
- PREVIEW: `dxf2code` add-on: function `black()` and method `Code.black_code_str()` 
  returns the code string formatted by [Black](https://pypi.org/project/black/)
- PREVIEW: `ezdxf.upright` module to flip inverted extrusion vectors, for more 
  information read the [docs](https://ezdxf.mozman.at/docs/upright.html)  

Version 0.16.4 - 2021-06-20
---------------------------

- NEW: `PolylinePath.type` and `EdgePath.type` as `ezdxf.entities.BoundaryPathType` enum 
- NEW: `LineEdge.type`, `ArcEdge.type`, `EllipseEdge.type` and `SplineEdge.type` 
  as `ezdxf.entities.EdgeType` enum
- NEW: `Path.all_lines_to_curve3()`, convert all LINE_TO commands into linear 
  CURVE3_TO commands  
- NEW: `Path.all_lines_to_curve4()`, convert all LINE_TO commands into linear 
  CURVE4_TO commands
- NEW: create an AppID `EZDXF` when saving a DXF file by *ezdxf*  
- BUGFIX: loading crash of the PyQt `CADViewer` class
- BUGFIX: loading `GEODATA` version 1, perhaps data is incorrect, 
  logged as warning
- BUGFIX: `HATCH` spline edge from fit points require start- and end tangents
- BUGFIX: `disassemble.make_primitive()` transform LWPOLYLINE including width 
  values into WCS
- BUGFIX: ignore open loops in `HATCH` edge paths 
- BUGFIX: correct application of the `Dimension.dxf.insert` attribute
- BUGFIX: fixed incorrect "thickness" transformation of OCS entities
- BUGFIX: add missing "width" transformation to POLYLINE and LWPOLYLINE
- BUGFIX: drawing add-on handles the invisible flag for INSERT correct
- PREVIEW: new features to try out, API may change until official release in v0.17
- PREVIEW: `move_to()` command and multi-path support for the `ezdxf.path.Path` class 
- PREVIEW: `MPOLYGON` load/write/create support
- PREVIEW: store *ezdxf* and custom metadata in DXF files, see [docs](https://ezdxf.mozman.at/docs/drawing/management.html#ezdxf-metadata)
- PREVIEW: command `ezdxf browse FILE`, PyQt DXF structure browser
- PREVIEW: command `ezdxf strip FILE [FILE ...]`, remove comment tags (999) and the 
  THUMBNAILIMAGE section


Version 0.16.3 - 2021-05-22
---------------------------

- NEW: `ezdxf.tools.text.MTextEditor` class, extracted from the `MText` class
- NEW: `MText.set_bg_color()`, new argument `text_frame` to add a text frame
- CHANGE: move `MText` constants to `MTextEditor` class
- CHANGE: move `MText.set_font()` to `MTextEditor.change_font()`
- CHANGE: move `MText.set_color()` to `MTextEditor.change_color()`
- CHANGE: move `MText.append_stacked_text()` to `MTextEditor.stacked_text()`
- BUGFIX: DXF export of GROUP checks for deleted entities
- BUGFIX: improved virtual DIMENSION handling
- BUGFIX: DIMENSION transformation also transform the content of the 
  associated anonymous geometry block content
- BUGFIX: `drawing` add-on, true color values always override ACI colors
- BUGFIX: `drawing` add-on, handle SOLID as OCS entity like TRACE
- BUGFIX/CHANGE: `Vec2/3.__eq__()` (`==` operator) compares 
  all components with the full floating point precision, use `Vec2/3.isclose()` 
  to take floating point imprecision into account. 
  **This is an annoying but necessary change!**
- CHANGE: new signature for `Vec2/3.isclose(other, *, rel_tol=1e-9, abs_tol=1e-12)`, 
  new argument `rel_tol`, arguments `rel_tol` and `abs_tol` are keyword only

Version 0.16.2 - 2021-04-21
---------------------------

- CHANGED: `ezdxf.path.add_bezier4p()`, add linear Bezier curve segments as LINE_TO commands
- CHANGED: `ezdxf.path.add_bezier3p()`, add linear Bezier curve segments as LINE_TO commands
- CHANGED: `$FINGERPRINTGUID` matches AutoCAD pattern `{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}`
- CHANGED: `$VERSIONGUID` matches AutoCAD pattern `{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}`
- BUGFIX: check for degenerated Bezier curves in `have_bezier_curves_g1_continuity()`
- BUGFIX: delete and unlink support for DXFTagStorage (unsupported entities)

Version 0.16.1 - 2021-04-10
---------------------------

- BUGFIX: `disassemble.recursive_decompose()` was not recursive 
- BUGFIX: `Frontend` font resolver uses XDATA if no regular font file is defined 
- BUGFIX: version specific group code for header variable `$XCLIPFRAME` 
- BUGFIX: `INSERT` (block reference) transformation 

Version 0.16 - 2021-03-27
-------------------------

- Release notes: https://ezdxf.mozman.at/release-v0-16.html
- NEW: `ezdxf` command line launcher, supported commands:
  - `pp` the previous `dxfpp` command, the DXF pretty printer
  - `audit` DXF files
  - `draw` and convert DXF files by the Matplotlib backend 
  - `view` DXF files by the PyQt viewer 
- NEW: `text2path` add-on to create `Path` objects from text strings and text 
  entities, see [docs](https://ezdxf.mozman.at/docs/addons/text2path.html)
- NEW: `bbox` module to detect the extents (bounding boxes) of DXF entities, 
  see [docs](https://ezdxf.mozman.at/docs/bbox.html)
- NEW: `zoom` module to reset the active viewport of layouts, 
  see [docs](https://ezdxf.mozman.at/docs/zoom.html)
- NEW: `path` sub-package, an extended version of the previous `ezdxf.render.path`
  module, see [docs](https://ezdxf.mozman.at/docs/path.html)
- NEW: support module `disassemble`, see [docs](https://ezdxf.mozman.at/docs/disassemble.html)
  1. deconstruct complex nested DXF entities into a flat sequence
  2. create a "primitive" representation of DXF entities
- NEW: Using the optional `Matplotlib` package by **default** for better font 
  metric calculation and font rendering if available.
- NEW: Cached font metrics are loaded at startup, this can be disabled by the 
  environment variable `EZDXF_AUTO_LOAD_FONTS=False`, if this slows down the 
  interpreter startup too much.
- NEW: `Layout.reset_extents()`, reset layout extents to the given values, 
  or the AutCAD default values  
- NEW: `Layout.reset_limits()`, reset layout limits to the given values, 
  or the AutCAD default values  
- NEW: `Paperspace.reset_main_viewport()`, reset the main viewport of a paper 
  space layout to custom- or default values  
- NEW: quadratic BÃ©zier curve support for the `Path()` class
- NEW: `ezdxf.entity.Text` getter/setter properties `is_backward` and 
  `is_upside_down`
- NEW: `ezdxf.entity.TextStyle` getter/setter properties `is_backward`, 
  `is_upside_down` and `is_vertical_stacked` 
- NEW: `ezdxf.math.Bezier3P`, optimized quadratic BÃ©zier curve construction tool 
- NEW: `ezdxf.math.quadratic_to_cubic_bezier()`, `Bezier3P` to `Bezier4P` converter   
- NEW: `ezdxf.math.bezier_to_bspline()`, BÃ©zier curves to B-spline converter
- NEW: `ezdxf.math.clip_polygon_2d()`, clip polygon by a convex clipping polygon 
- NEW: `ezdxf.math.basic_transformation()`, returns a combined transformation
  matrix for translation, scaling and rotation about the z-axis
- NEW: `ezdxf.math.best_fit_normal()`, returns the normal vector of flat spatial planes
- NEW: `fit_points_to_cubic_bezier()` creates a visual equal SPLINE from fit 
  points without end tangents like BricsCAD, but only for short B-splines.
- CHANGED: `fit_points_to_cad_cv()`, removed unused arguments `degree` and `method`   
- CHANGED: `ezdxf.render.nesting` content moved into the `ezdxf.path` package
- CHANGED: renamed `MeshBuilder.render()` to `MeshBuilder.render_mesh()`
- CHANGED: `ezdxf.math.BSpline` is immutable, all methods return a new `BSpline` object
- CHANGED: replaced `BSplineU()` class by factory function `ezdxf.math.open_uniform_bspline()` 
- CHANGED: replaced `BSplineClosed()` class by factory function `ezdxf.math.closed_uniform_bspline()` 
- CHANGED: renamed `rational_spline_from_arc()` to `rational_bspline_from_arc()` 
- CHANGED: renamed `rational_spline_from_ellipse()` to `rational_bspline_from_ellipse()` 
- BUGFIX: fixed `ezdxf.math.rational_bspline_from_ellipse()` invalid parameter 
  conversion   
- DEPRECATED: `ezdxf.render.path` module, replaced by `ezdxf.path` package
- DEPRECATED: `Path.from_lwpolyline()`, replaced by factory `path.make_path()`
- DEPRECATED: `Path.from_polyline()`, replaced by factory `path.make_path()`
- DEPRECATED: `Path.from_spline()`, replaced by factory `path.make_path()`
- DEPRECATED: `Path.from_ellipse()`, replaced by factory `path.make_path()`
- DEPRECATED: `Path.from_arc()`, replaced by factory `path.make_path()`
- DEPRECATED: `Path.from_circle()`, replaced by factory `path.make_path()`
- DEPRECATED: `Path.add_curve()`, replaced by function `path.add_bezier4p()`
- DEPRECATED: `Path.add_ellipse()`, replaced by function `path.add_ellipse()`
- DEPRECATED: `Path.add_spline()`, replaced by function `path.add_spline()`
- DEPRECATED: `Path.from_vertices()`, replaced by factory `path.from_vertices()`
- REMOVED: `Path.from_hatch_boundary_path()`, replaced by factory `path.from_hatch()`
- REMOVED: `Path.from_hatch_polyline_path()`
- REMOVED: `Path.from_hatch_edge_path()`
- REMOVED: `BlocksSection.purge()`, unsafe operation
- REMOVED: `dxfpp` command, replaced by `ezdxf pp ...`
- REMOVED: `Layout.add_closed_spline()`, broken and nobody noticed it
- REMOVED: `Layout.add_closed_rational_spline()`, broken and nobody noticed it

Version 0.15.2 - 2021-02-07
---------------------------

- Active Python 3.6 support removed, no tests and no deployment of binary 
  wheels for Python 3.6
- NEW: `BoundingBox()` intersection test, inside- and outside tests, union of 
  two bounding boxes.
- NEW: `ezdxf.math.ellipse_param_span()`, works the same way as 
  `arc_angle_span_deg()` for special cases
- NEW: `DXFEntity.uuid` property, returns an UUID on demand, which allows 
  distinguishing even virtual entities without a handle 
- CHANGE: extraction of many text utility functions into `ezdxf.tools.text`
- CHANGE: `add_polyline2d()`, `add_polyline3d()`, `add_lwpolyline()` and 
  `add_mline()` got argument `close` to create a closed polygon and 
  dxfattrib `closed` is deprecated, `close` and `dxfattribs` for these factories 
  are keyword only arguments.
- CHANGE: improved text alignment rendering in the drawing add-on
- CHANGE: moved `ezdxf.addons.drawing.fonts.py` into `ezdxf.tools` and added a 
  font measurement cache.  
- BUGFIX: `FIT` and `ALIGNED` text rendering in the drawing add-on 
- BUGFIX: matplotlib backend uses linewidth=0 for solid filled polygons and 
  the scaled linewidth for polygons with pattern filling
- BUGFIX: clipping path calculation for IMAGE and WIPEOUT
- BUGFIX: transformation of a closed (360deg) arc preserves a closed arc
- BUGFIX: bulge values near 0 but != 0 caused an exception in `Path.add_2d_polyline()`
- BUGFIX: invalid polygon building in the `geo` add-on

Version 0.15.1 - 2021-01-15
---------------------------

- NEW: `Spline.audit()` audit support for the SPLINE entity
- NEW: The `recover` module tolerates malformed group codes and value tags.
- Changed the `Matrix44.matrix` attribute in the Python implementation to a 
  "private" attribute `Matrix44._matrix`, because this attribute is not 
  available in the Cython implementation
- BUGFIX: proxy graphic decoding error on big-endian systems
- BUGFIX: invalid vertex subscript access in `dxf2code` add-on 
- BUGFIX: `cubic_bezier_from_ellipse()` recognizes full ellipses  
- BUGFIX: `cubic_bezier_from_arc()` recognizes full circles  
- BUGFIX: pickle support for C-extensions `Vec2`, `Vec3`, `Matrix44` and 
  `Bezier4P`
- BUGFIX: attribute error when exporting matrices in the MATERIAL entity

Version 0.15 - 2020-12-30
-------------------------

- Release notes: https://ezdxf.mozman.at/release-v0-15.html
- NEW: linetype support for matplotlib- and pyqt drawing backend
- NEW: HATCH island support for matplotlib- and pyqt drawing backend
- NEW: basic HATCH pattern support for matplotlib- and pyqt drawing backend
- NEW: Font support for matplotlib- and pyqt drawing backend
- NEW: POINT mode support for matplotlib- and pyqt drawing backend, relative 
  point size is not supported
- NEW: Proxy graphic support for the drawing add-on
- NEW: recover misplaced tags of the `AcDbEntity` subclass (color, layer, 
  linetype, ...), supported by all loading modes
- NEW: `ezdxf.addons.geo` module, support for the 
  [`__geo_interface__`](https://gist.github.com/sgillies/2217756),
  see [docs](https://ezdxf.mozman.at/docs/addons/geo.html) and 
  [tutorial](https://ezdxf.mozman.at/docs/tutorials/geo.html)
- NEW: `GeoData.setup_local_grid()` setup geo data for CRS similar to EPSG:3395 
  World Mercator
- NEW: MLINE support but without line break and fill break (gaps) features
- NEW: `Bezier.flattening()` adaptive recursive flattening (approximation)
- NEW: `Bezier4P.flattening()` adaptive recursive flattening (approximation)
- NEW: `Path.flattening()` adaptive recursive flattening (approximation)
- NEW: `Circle.flattening()` approximation determined by a max. sagitta value
- NEW: `Arc.flattening()` approximation determined by a max. sagitta value
- NEW: `ConstructionArc.flattening()` approximation determined by a max. sagitta value
- NEW: `ezdxf.math.distance_point_line_3d()`
- NEW: `ConstructionEllipse.flattening()` adaptive recursive flattening (approximation)
- NEW: `Ellipse.flattening()` adaptive recursive flattening (approximation)
- NEW: `BSpline.flattening()` adaptive recursive flattening (approximation)
- NEW: `Spline.flattening()` adaptive recursive flattening (approximation)
- NEW: `matplotlib.qsave()`, `ltype` argument to switch between matplotlib dpi 
  based linetype rendering and AutoCAD like drawing units based linetype 
  rendering
- NEW: `Solid.vertices()` returns OCS vertices in correct order (also `Trace`)
- NEW: `Solid.wcs_vertices()` returns WCS vertices in correct order (also `Trace`)
- NEW: `Face3D.wcs_vertices()` compatibility interface to SOLID and TRACE
- NEW: `Hatch.paths.external_paths()` returns iterable of external boundary paths
- NEW: `Hatch.paths.outermost_paths()` returns iterable of outer most boundary paths
- NEW: `Hatch.paths.default_paths()` returns iterable of default boundary paths
- NEW: `Hatch.paths.rendering_paths()` returns iterable of paths to process for rendering
- NEW: `Drawing.units` property to get/set document/modelspace units
- NEW: `ezdxf.new()` argument `units` to setup document and modelspace units and
  $MEASUREMENT setting and the linetype setup is based on this $MEASUREMENT 
  setting.
- NEW: `pattern.load(measurement, factor)` load scaled hatch pattern
- NEW: `Path.from_hatch_boundary_path()`
- NEW: `odafc.export_dwg()` new replace option to delete existing DWG files
- NEW `Style` table entry supports extended font data
- NEW: `Point.virtual_entities()`, yield POINT entities as DXF primitives
- NEW: `ezdxf.render.point`, support module for `Point.virtual_entities()`
- NEW: Optional Cython implementation of some low level math classes: 
  Vec2, Vec3, Matrix44, Bezier4P  
- NEW: support for complex linetypes for the Importer add-on
- CHANGE: Optimized infrastructure for loading DXF attributes 
- CHANGE: `Hatch.set_pattern_fill()` uses HEADER variable $MEASUREMENT to 
  determine the default scaling of predefined hatch pattern. 
- CHANGE: fix invalid linetype setup - new linetype scaling like common CAD 
  applications
- CHANGE: `ezdxf.colors` module will consolidate all color/transparency related 
  features
- CHANGE: renamed `ezdxf.math.Vector` to `Vec3`, but `Vector` remains as synonym
- DEPRECATED: `ezdxf.tools.rgb` module replaced by `ezdxf.colors`
- REMOVED: deprecated `DXFEntity.transform_to_wcs()` interface, 
  use `DXFEntity.transform(ucs.matrix)`
- REMOVED: deprecated `Hatch.edit_boundary()` context manager, 
  use `Hatch.paths` attribute
- REMOVED: deprecated `Hatch.get_gradient()` method,
  use `Hatch.gradient` attribute
- REMOVED: deprecated `Hatch.edit_gradient()` context manager,
  use `Hatch.gradient` attribute
- REMOVED: deprecated `Hatch.edit_pattern()` context manager,
  use `Hatch.pattern` attribute
- REMOVED: deprecated `Hatch.get_seed_points()` method,
  use `Hatch.seeds` attribute
- REMOVED: unnecessary argument `non_uniform_scaling` from `Insert.explode()`
- REMOVED: unnecessary argument `non_uniform_scaling` from 
  `Insert.virtual_entities()`
- REMOVED: deprecated `Spline.edit_data()` context manager,
  use `fit_points`, `control_points`, `knots`  and `weights` attributes
- BUGFIX: `ezdxf.math.has_clockwise_orientation()` returns `True` for 
  counter-clock wise and vice versa
- BUGFIX: default color for HATCH is 256 (by layer)
- BUGFIX: fixed broken complex linetype setup
- BUGFIX: validate loaded handle seed

Version 0.14.2 - 2020-10-18
---------------------------

- Release notes: https://ezdxf.mozman.at/release-v0-14.html
- BUGFIX: fix invalid attribute reference `self.drawing`

Version 0.14.1 - 2020-09-19
---------------------------

- Release notes: https://ezdxf.mozman.at/release-v0-14.html
- BUGFIX: MLEADER and MLEADERSTYLE min DXF version changed to R2000
- BUGFIX: AutoCAD ignores not existing default objects in ACDBDICTIONARYWDFLT
  and so ezdxf have to. `Auditor()` creates a place holder object as default 
  value.

Version 0.14 - 2020-09-12
-------------------------

- Release notes: https://ezdxf.mozman.at/release-v0-14.html
- NEW: DXF attribute setter validation, some special and undocumented Autodesk 
  table names may raise `ValueError()` exceptions, please report this table 
  names (layers, linetypes, styles, ...). DXF unicode notation "\U+xxxx" raises
  a `ValueError()` if used as resource names like layer name or text style names, 
  such files can only be loaded by the new `recover` module.
- NEW: `ezdxf.recover` module to load DXF Documents with structural flaws, see 
  [docs](https://ezdxf.mozman.at/docs/drawing/recover.html)
- NEW: All DXF loading functions accept an unicode decoding error handler: 
  "surrogateescape", "ignore" or "strict", see [docs](https://ezdxf.mozman.at/docs/drawing/recover.html) 
  of the `recover` module for more information.
- NEW: `addons.drawing.Frontend()` supports width attributes of LWPOLYLINE and 
  2D POLYLINE entities
- NEW: `TraceBuilder()` a render tool to generate quadrilaterals (TRACE, SOLID 
  or 3DFACE), from LWPOLYLINE or 2D POLYLINE with width information,
  see [docs](https://ezdxf.mozman.at/docs/render/trace.html)
- NEW: `Path()` a render tool for paths build of lines and cubic Bezier curves, 
  used for faster rendering of LWPOLYLINE, POLYLINE and SPLINE entities for 
  render back-ends, see [docs](https://ezdxf.mozman.at/docs/render/path.html)
- NEW: `drawing.matplotlib.qsave()` function, a simplified matplotlib export interface
- NEW: `Arc.construction_tool()` returns the 2D `ConstructionArc()`
- NEW: `Arc.apply_construction_tool()` apply parameters from `ConstructionArc()`
- NEW: `Leader.virtual_entities()` yields 'virtual' DXF primitives
- NEW: `Leader.explode()` explode LEADER as DXF primitives into target layout
- NEW: `LWPolyline.has_width` property is `True` if any width attribute is set
- NEW: `Polyline.has_width` property is `True` if any width attribute is set
- NEW: `Polyline.audit()` extended verify and repair support
- NEW: `Polyline.append_formatted_vertices()`, support for user defined point format
- NEW: `DXFVertex.format()` support for user defined point format 
- NEW: `Drawing.blocks.purge()` delete all unused blocks but protect modelspace-
  and paperspace layouts, special arrow blocks and DIMENSION and ACAD_TABLE 
  blocks in use, but see also warning in the 
  [docs](https://ezdxf.mozman.at/docs/sections/blocks.html)
- NEW: `Insert.explode()` support for MINSERT (multi insert)
- NEW: `Insert.virtual_entities()` support for MINSERT (multi insert)
- NEW: `Insert.mcount` property returns multi insert count
- NEW: `Insert.multi_insert()` yields a virtual INSERT entity for each grid 
  element of a MINSERT entity
- NEW: `Layout.add_wipeout()` interface to create WIPEOUT entities
- NEW: `Image.boundary_path_wcs()`, returns boundary path in WCS coordinates
- NEW: `Wipeout.boundary_path_wcs()`, returns boundary path in WCS coordinates
- NEW: `Wipeout.set_masking_area()`
- NEW: `BSpline.is_clamped` property is `True` for a clamped (open) B-spline
- NEW: `UCS.transform()` general transformation interface
- NEW: `Bezier4P.transform()` general transformation interface
- NEW: `Bezier4P.reverse()` returns object with reversed control point order
- NEW: `Bezier.transform()` general transformation interface
- NEW: `Bezier.reverse()` returns object with reversed control point order
- NEW: `has_clockwise_orientation(vertices)` returns `True` if the closed 
  polygon of 2D vertices has clockwise orientation
- NEW: `DXFEntity.new_extension_dict()`, create explicit a new extension dictionary
- NEW: `ezdxf.reorder`, support module to implement modified entities redraw order
- NEW: get DXF test file path from environment variable `EZDXF_TEST_FILES`, 
  imported automatically as `ezdxf.EZDXF_TEST_FILES`
- NEW: `arc_chord_length()` and `arc_segment_count()` tool functions in 
  `ezdxf.math`
- NEW: `Drawing.encode()` to encode unicode strings with correct encoding and 
  error handler
- NEW: `ezdxf.has_dxf_unicode()` to detect "\U+xxxx" encoded chars
- NEW: `ezdxf.decode_dxf_unicode()` to decode strings containing  
  "\U+xxxx" encoded chars, the new `recover` module decodes such strings 
  automatically.
- CHANGE: `DXFEntity.get_extension_dict()`, raises `AttributeError` if entity
  has no extension dictionary 
- CHANGE: `DXFEntity.has_extension_dict` is now a property not a method
- CHANGE: `linspace()` uses `Decimal()` for precise calculations, but still 
  returns an iterable of `float`
- CHANGE: `Drawing.blocks.delete_all_blocks()`, unsafe mode is disabled and 
  argument `safe` is deprecated, will be removed in v0.16
- CHANGE: Dictionary raise `DXFValueError` for adding invalid handles
- CHANGE: `BaseLayout.add_entity()` will bind entity automatically to doc/db if possible
- CHANGE: handle all layout names as case insensitive strings: `Model == MODEL`
- REMOVE: `option.check_entity_tag_structure`, entity check is done only in 
  recover mode
- REMOVE: `legacy_mode` in `ezdxf.read()` and `ezdxf.readfile()`, use the 
  `ezdxf.recover` module to load DXF Documents with structural flaws
- REMOVE: Alias `DXFEntity.drawing` use `DXFEntity.doc`
- REMOVE: `DXFEntity.entitydb`
- REMOVE: `DXFEntity.dxffactory`
- REMOVE: `DXFInvalidLayerName`, replaced by `DXFValueError` 
- REMOVE: `Image.get_boundary_path()`, replaced by property `Image.boundary_path` 
- REMOVE: `Image.get_image_def()`, replaced by property `Image.image_def` 
- REMOVE: `filter_stack` argument in `ezdxf.read()` and `ezdxf.readfile()` 
- BUGFIX: Set `non-constant-attribs` flag (2) in BLOCK at DXF export if non 
  constant ATTDEF entities are present.
- BUGFIX: DXF R2018 - `HATCH` extrusion vector (210) is mandatory?
- BUGFIX: Layout names are case insensitive; "MODEL" == "Model" 
- BUGFIX: Using "surrogateescape" error handler to preserve binary data in 
  ASCII DXF files. Prior versions of ezdxf corrupted this data by using the 
  "ignore" error handler; Example file with binary data in XRECORD is not valid 
  for TrueView 2020 - so binary data is maybe not allowed.

Version 0.13.1 - 2020-07-18
---------------------------

- Release notes: https://ezdxf.mozman.at/release-v0-13.html
- BUGFIX: remove white space from structure tags like `"SECTION "`
- BUGFIX: `MeshBuilder.from_polyface()` processing error of POLYMESH entities

Version 0.13 - 2020-07-04
-------------------------

- Release notes: https://ezdxf.mozman.at/release-v0-13.html
- NEW: general transformation interface: `DXFGraphic.transform(m)`, 
  transform entity by a transformation matrix `m` inplace
- NEW: specialized entity transformation interfaces:
    - `DXFGraphic.translate(dx, dy, dz)`
    - `DXFGraphic.scale(sx, sy, sz)`
    - `DXFGraphic.scale_uniform(s)`
    - `DXFGraphic.rotate_axis(axis, angle)`
    - `DXFGraphic.rotate_x(angle)`
    - `DXFGraphic.rotate_y(angle)`
    - `DXFGraphic.rotate_z(angle)`   
- NEW: [drawing](https://ezdxf.mozman.at/docs/addons/draw.html) add-on by Matt Broadway is a translation
  layer to send DXF data to a render backend, supported backends for now: 
  [matplotlib](https://pypi.org/project/matplotlib/) and [PyQt5](https://pypi.org/project/PyQt5/), both packages 
  are optional and not required to install _ezdxf_. 
- NEW: `DXFGraphic.unlink_from_layout()` to unlink entity from associated layout
- NEW: `Arc.angles(num)`, yields `num` angles from start- to end angle in counter clockwise order
- NEW: `Circle.to_ellipse()`, convert CIRCLE/ARC to ELLIPSE entity
- NEW: `Circle.to_spline()`, convert CIRCLE/ARC to SPLINE entity
- NEW: `Ellipse.params(num)`, yields `num` params from start- to end param in counter clockwise order
- NEW: `Ellipse.construction_tool()`, return ellipse data as `ConstructionEllipse()`
- NEW: `Ellipse.apply_construction_tool()`, apply `ConstructionEllipse()` data
- NEW: `Ellipse.to_spline()`, convert ELLIPSE to SPLINE entity 
- NEW: `Ellipse.from_arc()`, create a new ELLIPSE entity from CIRCLE or ARC entity (constructor)
- NEW: `Spline.construction_tool()`, return spline data as `ezdxf.math.BSpline()`
- NEW: `Spline.apply_construction_tool()`, apply `ezdxf.math.BSpline()` data
- NEW: `Spline.from_arc()`, create a new SPLINE entity from CIRCLE, ARC or ELLIPSE entity (constructor)
- NEW: `Hatch.set_pattern_scale()` to set scaling of pattern definition
- NEW: `Hatch.set_pattern_angle()` to set rotation angle of pattern definition
- NEW: `Hatch.paths.polyline_to_edge_paths()` convert polyline paths with bulge values to edge paths with lines and arcs
- NEW: `Hatch.paths.arc_edges_to_ellipse_edges()` convert arc edges to ellipse edges
- NEW: `Hatch.paths.ellipse_edges_to_spline_edges()` convert ellipse edges to spline edges
- NEW: `Hatch.paths.all_to_spline_edges()` convert all curves to approximated spline edges
- NEW: `Hatch.paths.all_to_line_edges()` convert all curves to approximated line edges
- NEW: `Text.plain_text()` returns text content without formatting codes
- NEW: `ezdxf.math.ConstructionEllipse()`
- NEW: `ezdxf.math.linspace()` like `numpy.linspace()`
- NEW: `ezdxf.math.global_bspline_interpolation()` supports start- and end tangent constraints
- NEW: `ezdxf.math.estimate_tangents()` curve tangent estimator for given fit points
- NEW: `ezdxf.math.estimate_end_tangent_magnitude()` curve end tangent magnitude estimator for given fit points
- NEW: `ezdxf.math.rational_bspline_from_arc()` returns a rational B-spline for a circular arc
- NEW: `ezdxf.math.rational_bspline_from_ellipse()` returns a rational B-spline for an elliptic arc
- NEW: `ezdxf.math.local_cubic_bspline_interpolation()`
- NEW: `ezdxf.math.cubic_bezier_from_arc()` returns an approximation for a circular 2D arc by multiple cubic Bezier curves
- NEW: `ezdxf.math.cubic_bezier_from_ellipse()` returns an approximation for an elliptic arc by multiple cubic Bezier curves
- NEW: `ezdxf.math.cubic_bezier_interpolation()` returns an interpolation curve for arbitrary data points as multiple cubic Bezier curves
- NEW: `ezdxf.math.LUDecomposition` linear equation solver, for more linear algebra tools see module `ezdxf.math.linalg`
- NEW: `ezdxf.render.random_2d_path()` generate random 2D path for testing purpose
- NEW: `ezdxf.render.random_3d_path()` generate random 3D path for testing purpose
- NEW: `BSpline()` uses normalized knot vector for 'clamped' curves by default (open uniform knots)
- NEW: `BSpline.points()` compute multiple points
- NEW: `BSpline.derivative()` compute point and derivative up to n <= degree
- NEW: `BSpline.derivatives()` compute multiple points and derivatives up to n <= degree
- NEW: `BSpline.params()` return evenly spaced B-spline params from start- to end param
- NEW: `BSpline.reverse()` returns a new reversed B-spline
- NEW: `BSpline.from_arc()` B-spline from an arc, best approximation with a minimum number of control points
- NEW: `BSpline.from_ellipse()` B-spline from an ellipse, best approximation with a minimum number of control points
- NEW: `BSpline.from_fit_points()` B-spline from fit points 
- NEW: `BSpline.arc_approximation()` B-spline approximation from arc vertices as fit points
- NEW: `BSpline.ellipse_approximation()` B-spline approximation from ellipse vertices as fit points
- NEW: `BSpline.transform()` transform B-spline by transformation matrix inplace
- NEW: `BSpline.transform()` transform B-spline by transformation matrix inplace
- NEW: `BSpline.to_nurbs_python_curve()` and `BSpline.from_nurbs_python_curve()`, interface to 
  [NURBS-Python](https://github.com/orbingol/NURBS-Python), `NURBS-Python` is now a testing dependency
- NEW: `BSpline.bezier_decomposition()` decompose a non-rational B-spline into multiple Bezier curves 
- NEW: `BSpline.cubic_bezier_approximation()` approximate any B-spline by multiple cubic Bezier curves 
- NEW: `Bezier.points()` compute multiple points
- NEW: `Bezier.derivative()` compute point, 1st and 2nd derivative for one parameter
- NEW: `Bezier.derivatives()` compute point and derivative for multiple parameters
- CHANGE: `Hatch` full support for rotated patterns.
- CHANGE: `Hatch.set_pattern_definition()` added argument `angle` for pattern rotation. 
- CHANGE: `Hatch.path.add_arc` renamed argument `is_counter_clockwise` to `ccw`, type `bool` and `True` by default 
- CHANGE: `Hatch.path.add_ellipse` renamed argument `is_counter_clockwise` to `ccw`, type `bool` and `True` by default 
- CHANGE: renamed 2D `ConstructionXXX.move()` methods to `translate()`
- CHANGE: renamed old `Insert.scale()` to `Insert.set_scale()`, name conflict with transformation interface
- CHANGE: renamed `Spline.set_periodic()` to `Spline.set_closed()`
- CHANGE: renamed `Spline.set_periodic_rational()` to `Spline.set_closed_rational()`
- CHANGE: renamed `ezdxf.math.bspline_control_frame()` to `ezdxf.math.global_bspline_interpolation()`
- REMOVED: `ezdxf.math.Matrix33` class, `UCS` and `OCS` uses `Matrix44`for transformations  
- REMOVED: `ezdxf.math.BRCS` class and `Insert.brcs()`
- REMOVED: `ezdxf.math.ConstructionTool` base class
- REMOVED: `ezdxf.math.normalize_angle(angle)`, replace call by expression: `angle % math.tau`
- REMOVED: `ezdxf.math.DBSpline`, integrated as `BSpline.derivatives()`
- REMOVED: `ezdxf.math.DBSplineU`, integrated as `BSplineU.derivatives()`
- REMOVED: `ezdxf.math.DBSplineClosed`, integrated as `BSplineClosed.derivatives()`
- REMOVED: `ezdxf.math.DBezier`, integrated as `Bezier.derivatives()`
- REMOVED: `BaseLayout.add_spline_approx()`, incorrect and nobody noticed it - so it's not really needed, if required 
  use the `geomdl.fitting.approximate_curve()` function from the package 
  [NURBS-Python](https://github.com/orbingol/NURBS-Python), see example `using_nurbs_python.py`
- REMOVED: `ezdxf.math.bspline_control_frame_approx()`, incorrect and nobody noticed it - so it's not really needed 
- DEPRECATED: `DXFGraphic.transform_to_wcs(ucs)`, replace call by `DXFGraphic.transform(ucs.matrix)`
- DEPRECATED: `non_uniform_scaling` argument for `Insert.explode()`  
- DEPRECATED: `non_uniform_scaling` argument for `Insert.virtual_entities()`  
- DEPRECATED: getter and edit methods in `Hatch` for attributes `paths`, `gradient`, `pattern` and `seeds` 
- DEPRECATED: `Spline.edit_data()` all attributes accessible by properties
- BUGFIX: `ezdxf.math.intersection_ray_ray_3d()` 
- BUGFIX: `Spline.set_periodic()` created invalid data for BricsCAD - misleading information by Autodesk

Version 0.12.5 - 2020-06-05
---------------------------

- BUGFIX: DXF export error for hatches with rational spline edges

Version 0.12.4 - 2020-05-22
---------------------------

- BUGFIX: structure validator for XRECORD

Version 0.12.3 - 2020-05-16
---------------------------

- BUGFIX: DXF R2010+ requires zero length tag 97 for HATCH/SplineEdge if no fit points exist (vshu3000)
- BUGFIX: Export order of XDATA and embedded objects (vshu3000)
- BUGFIX: ATTRIB and ATTDEF did not load basic DXF attributes
- NEW: `BlockLayout()` properties `can_explode` and `scale_uniformly`
- NEW: `Hatch.remove_association()`

Version 0.12.2 - 2020-05-03
---------------------------

- BUGFIX: `XData.get()` now raises `DXFValueError` for not existing appids, like all other methods of the `XData()` class
- BUGFIX: `Layer.description` returns an empty string for unknown XDATA structure in `AcAecLayerStandard`
- BUGFIX: Initialize/Load `Hatch` edge coordinates as `Vec2()` objects
- BUGFIX: typo in 3 point angular dimension subclass marker (vshu3000)
- BUGFIX: HATCH/SplineEdge did export length tag 97 if no fit points exist, creates invalid DXF for AutoCAD/BricsCAD (vshu3000)  
- BUGFIX: Ellipse handling in `virtual_block_reference_entities()` (Matt Broadway)  

Version 0.12.1 - 2020-04-25
---------------------------

- BUGFIX: fixed uniform scaled ellipse handling in `explode.virtual_block_reference_entities()`
- BUGFIX: fixed crash caused by floating point inaccuracy in `Vector.angle_between()` (Matt Broadway)
- BUGFIX: fixed crash for axis transformation of nearly perpendicular ellipse axis
- BUGFIX: fixed `Hatch.has_critical_elements()`


Version 0.12 - 2020-04-12
-------------------------

- Release notes: https://ezdxf.mozman.at/release-v0-12.html
- NEW: `Insert.block()` returns associated `BlockLayout()` or `None` if block not exist or is an XREF
- NEW: `Insert.has_scaling` returns `True` if any axis scaling is applied
- NEW: `Insert.has_uniform_scaling` returns `True` if scaling is uniform in x-, y- and z-axis.
- NEW: `Insert.scale(factor)` set uniform scaling.
- NEW: `Insert.virtual_entities()` yields 'virtual' entities of a block reference (experimental)
- NEW: `Insert.explode()` explode block reference entities into target layout (experimental)
- NEW: `Insert.add_auto_attribs()` add ATTRIB entities defined as ATTDEF in the block layout and fill tags 
        with values defined by a `dict` (experimental)
- NEW: `LWPolyline.virtual_entities()` yields 'virtual' LINE and ARC entities
- NEW: `LWPolyline.explode()` explode LWPOLYLINE as LINE and ARC entities into target layout
- NEW: `Polyline.virtual_entities()` yields 'virtual' LINE, ARC or 3DFACE entities
- NEW: `Polyline.explode()` explode POLYLINE as LINE, ARC or 3DFACE entities into target layout
- NEW: `Dimension.virtual_entities()` yields 'virtual' DXF entities
- NEW: `Dimension.explode()` explode DIMENSION as basic DXF entities into target layout
- NEW: `Dimension.transform_to_wcs()` support for UCS based entity transformation
- NEW: `Dimension.override()` returns `DimStyleOverride()` object
- NEW: `Dimension.render()` render graphical representation as anonymous block
- NEW: `Block()` properties `is_anonymous`, `is_xref` and `is_xref_overlay`
- NEW: `R12FastStreamWriter.add_polyline_2d()`, add 2D POLYLINE with start width, end width and bulge value support
- NEW: `Ellipse.minor_axis` property returns minor axis as `Vector`
- NEW: Option `ezdxf.options.write_fixed_meta_data_for_testing`, writes always same timestamps and GUID
- NEW: Support for loading and exporting proxy graphic encoded as binary data, by default disabled
- NEW: `ezdxf.proxygraphic.ProxyGraphic()` class to examine binary encoded proxy graphic (Need more example data 
        for testing!)
- NEW: Get/set hyperlink for graphic entities
- NEW: `odafc` add-on to use an installed ODA File Converter for reading and writing DWG files
- NEW: Support for reading and writing Binary DXF files
- NEW: Binary DXF support for `r12writer` add-on
- CHANGE: `R12FastStreamWriter.add_polyline()`, add 3D POLYLINE only, closed flag support
- CHANGE: renamed `Insert.ucs()` to `Insert.brcs()` which now returns a `BRCS()` object
- CHANGE: `Polyline.close()`, `Polyline.m_close()` and `Polyline.n_close()` can set and **clear** closed state.
- BUGFIX: `Dimension.destroy()` should not not destroy associated anonymous block, because if DIMENSION is used in a 
          block, the anonymous block may be used by several block references
- BUGFIX: floating point precision error in `intersection_line_line_2d()`
- BUGFIX: attribute error in `Polyline.transform_to_wcs()` for 2d polylines
- BUGFIX: LWPOLYLINE was always exported with `const_width=0`
- BUGFIX: `Face3d.set_edge_visibility()` set inverted state (visible <-> invisible)
- BUGFIX: Load `AcDbEntity` group codes from base class



