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.. _MLEADER Internals:
MULTILEADER Internals
=====================
The MULTILEADER leader is a very complex entity and has also some weird and
unique properties.
1. MULTILEADER has the alias name MLEADER which is accepted by any
:term:`reliable CAD application`, but all of them create the entity as
MULTILEADER
2. uses :term:`raw-color` values to define colors
3. creates a complex context data structures beyond simple tags inside the
subclass ``AcDbMLeader``
.. seealso::
- :class:`ezdxf.entities.MultiLeader`
- :class:`ezdxf.entities.MLeaderStyle`
- :class:`ezdxf.render.MultiLeaderBuilder`
- :ref:`tut_mleader`
- DXF Reference: `MLEADER`_
Example for :class:`ezdxf.entities.MLeaderContext` created by BricsCAD:
.. code-block::
300 <str> CONTEXT_DATA{
40 <float> 1.0 <<< content scale
10 <point> (x, y, z) <<< content base point
41 <float> 4.0 <<< text height
140 <float> 4.0 <<< arrowhead size
145 <float> 2.0 <<< landing gap size
174 <int> 1 <<< doc missing
175 <int> 1 <<< doc missing
176 <int> 0 <<< doc missing
177 <int> 0 <<< doc missing
290 <int> 1 <<< has_mtext_content
<<< START MText Content tags:
304 <str> MTEXT content string
11 <point> (0.0, 0.0, 1.0) <<< extrusion vector
340 <hex> #A0 <<< text style as handle
12 <point> (x, y, z) <<< text location
13 <point> (1.0, 0.0, 0.0) <<< text direction
42 <float> 0.0 <<< text rotation
43 <float> 0.0 <<< text width
44 <float> 0.0 <<< text height
45 <float> 1.0 <<< text line space factor
170 <int> 1 <<< text line space style
90 <int> -1056964608 <<< text color (raw value)
171 <int> 1 <<< text attachment
172 <int> 1 <<< text flow direction
91 <int> -939524096 <<< text background color (raw value)
141 <float> 1.5 <<< text background scale factor
92 <int> 0 <<< text background transparency
291 <int> 0 <<< has_text_bg_color
292 <int> 0 <<< has_text_bg_fill
173 <int> 0 <<< text column type
293 <int> 0 <<< use text auto height
142 <float> 0.0 <<< text column width
143 <float> 0.0 <<< text column gutter width
294 <int> 0 <<< text column flow reversed
144 <float> missing <<< text column height (optional?)
295 <int> 0 <<< text use word break
<<< END MText Content tags:
296 <int> 0 <<< has_block_content
<<< START Block content tags
<<< END Block content tags
110 <point> (0.0, 0.0, 0.0) <<< MLEADER plane origin point
111 <point> (1.0, 0.0, 0.0) <<< MLEADER plane x-axis direction
112 <point> (0.0, 1.0, 0.0) <<< MLEADER plane y-axis direction
297 <int> 0 <<< MLEADER normal reversed
302 <str> LEADER{
...
303 <str> }
302 <str> LEADER{
...
303 <str> }
272 <int> 9 <<< doc missing
273 <int> 9 <<< doc missing
301 <str> }
<<< BricsCAD example for block content:
300 <str> CONTEXT_DATA{
40 <float> 1.0
10 <point> (x, y, z)
41 <float> 4.0
140 <float> 4.0
145 <float> 2.0
174 <int> 1
175 <int> 1
176 <int> 0
177 <int> 0
290 <int> 0 <<< has_mtext_content
296 <int> 1 <<< has_block_content
<<< START Block content tags
341 <hex> #94 <<< dxf.block_record_handle
14 <point> (0.0, 0.0, 1.0) <<< Block extrusion vector
15 <point> (x, y, z) <<< Block location
16 <point> (1.0, 1.0, 1.0) <<< Block scale vector, the x-, y- and z-axis scaling factors
46 <float> 0.0 <<< Block rotation in radians!
93 <int> -1056964608 <<< Block color (raw value)
47 <float> 1.0 <<< start of transformation matrix (16x47)
47 <float> 0.0
47 <float> 0.0
47 <float> 18.427396871473
47 <float> 0.0
47 <float> 1.0
47 <float> 0.0
47 <float> 0.702618780008
47 <float> 0.0
47 <float> 0.0
47 <float> 1.0
47 <float> 0.0
47 <float> 0.0
47 <float> 0.0
47 <float> 0.0
47 <float> 1.0 <<< end of transformation matrix
<<< END Block content tags
110 <point> (0.0, 0.0, 0.0) <<< MLEADER plane origin point
111 <point> (1.0, 0.0, 0.0) <<< MLEADER plane x-axis direction
112 <point> (0.0, 1.0, 0.0) <<< MLEADER plane y-axis direction
297 <int> 0 <<< MLEADER normal reversed
302 <str> LEADER{
...
303 <str> }
272 <int> 9
273 <int> 9
301 <str> }
<<< Attribute content and other redundant block data is stored in the AcDbMLeader
<<< subclass:
100 <ctrl> AcDbMLeader
270 <int> 2 <<< dxf.version
300 <str> CONTEXT_DATA{ <<< start context data
...
301 <str> } <<< end context data
340 <hex> #6D <<< dxf.style_handle
90 <int> 6816768 <<< dxf.property_override_flags
... <<< property overrides
292 <int> 0 <<< dxf.has_frame_text
<<< mostly redundant block data:
344 <hex> #94 <<< dxf.block_record_handle
93 <int> -1056964608 <<< dxf.block_color (raw value)
10 <point> (1.0, 1.0, 1.0) <<< dxf.block_scale_vector
43 <float> 0.0 <<< dxf.block_rotation in radians!
176 <int> 0 <<< dxf.block_connection_type
293 <int> 0 <<< dxf.is_annotative
<<< REPEAT: (optional)
94 <int> <<< arrow head index?
345 <hex> <<< arrow head handle
<<< REPEAT: (optional)
330 <hex> #A3 <<< ATTDEF handle
177 <int> 1 <<< ATTDEF index
44 <float> 0.0 <<< ATTDEF width
302 <str> B <<< ATTDEF text (reused group code)
... common group codes 294, 178, 179, ...
.. _MLEADER: https://help.autodesk.com/view/OARX/2018/ENU/?guid=GUID-72D20B8C-0F5E-4993-BEB7-0FCF94F32BE0
|
