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|
.. _dimstyle_table_internals:
DIMSTYLE Table
==============
The `DIMSTYLE`_ table stores all dimension style definitions of a DXF drawing.
You have access to the dimension styles table by the attribute :attr:`Drawing.dimstyles`.
.. seealso::
- DXF Reference: `TABLES Section`_
- DXF Reference: `DIMSTYLE`_ Table
Table Structure DXF R12
-----------------------
.. code-block:: none
0 <<< start of table
TABLE
2 <<< set table type
DIMSTYLE
70 <<< count of line types defined in this table, AutoCAD ignores this value
9
0 <<< 1. DIMSTYLE table entry
DIMSTYLE
<<< DIMSTYLE data tags
0 <<< 2. DIMSTYLE table entry
DIMSTYLE
<<< DIMSTYLE data tags and so on
0 <<< end of DIMSTYLE table
ENDTAB
DIMSTYLE Entry DXF R12
----------------------
DIMSTYLE Variables DXF R12
--------------------------
Source: `CADDManager Blog`_
.. image:: gfx/dimvars1.svg
:align: center
:width: 800px
.. image:: gfx/dimvars2.svg
:align: center
:width: 800px
=================== ======= ==============================================================================================
DIMVAR Code Description
=================== ======= ==============================================================================================
DIMALT 170 Controls the display of alternate units in dimensions.
DIMALTD 171 Controls the number of decimal places in alternate units. If DIMALT is turned on, DIMALTD sets
the number of digits displayed to the right of the decimal point in the alternate measurement.
DIMALTF 143 Controls the multiplier for alternate units. If DIMALT is turned on, DIMALTF multiplies linear
dimensions by a factor to produce a value in an alternate system of measurement. The initial
value represents the number of millimeters in an inch.
DIMAPOST 4 Specifies a text prefix or suffix (or both) to the alternate dimension measurement for all
types of dimensions except angular. For instance, if the current units are Architectural,
DIMALT is on, DIMALTF is 25.4 (the number of millimeters per inch), DIMALTD is 2, and DIMPOST
is set to "mm", a distance of 10 units would be displayed as 10"[254.00mm].
DIMASZ 41 Controls the size of dimension line and leader line arrowheads. Also controls the size of hook
lines. Multiples of the arrowhead size determine whether dimension lines and text should fit
between the extension lines. DIMASZ is also used to scale arrowhead blocks if set by DIMBLK.
DIMASZ has no effect when DIMTSZ is other than zero.
DIMBLK 5 Sets the arrowhead block displayed at the ends of dimension lines.
DIMBLK1 6 Sets the arrowhead for the first end of the dimension line when DIMSAH is 1.
DIMBLK2 7 Sets the arrowhead for the second end of the dimension line when DIMSAH is 1.
DIMCEN 141 Controls drawing of circle or arc center marks and centerlines by the DIMCENTER, DIMDIAMETER,
and DIMRADIUS commands. For DIMDIAMETER and DIMRADIUS, the center mark is drawn only if you
place the dimension line outside the circle or arc.
- 0 = No center marks or lines are drawn
- <0 = Centerlines are drawn
- >0 = Center marks are drawn
DIMCLRD 176 Assigns colors to dimension lines, arrowheads, and dimension leader lines.
- 0 = BYBLOCK
- 1-255 = ACI AutoCAD Color Index
- 256 = BYLAYER
DIMCLRE 177 Assigns colors to dimension extension lines, values like DIMCLRD
DIMCLRT 178 Assigns colors to dimension text, values like DIMCLRD
DIMDLE 46 Sets the distance the dimension line extends beyond the extension line when oblique strokes
are drawn instead of arrowheads.
DIMDLI 43 Controls the spacing of the dimension lines in baseline dimensions. Each dimension line is
offset from the previous one by this amount, if necessary, to avoid drawing over it. Changes
made with DIMDLI are not applied to existing dimensions.
DIMEXE 44 Specifies how far to extend the extension line beyond the dimension line.
DIMEXO 42 Specifies how far extension lines are offset from origin points. With fixed-length extension
lines, this value determines the minimum offset.
DIMGAP 147 Sets the distance around the dimension text when the dimension line breaks to accommodate
dimension text. Also sets the gap between annotation and a hook line created with the LEADER
command. If you enter a negative value, DIMGAP places a box around the dimension text.
DIMGAP is also used as the minimum length for pieces of the dimension line. When the default
position for the dimension text is calculated, text is positioned inside the extension lines
only if doing so breaks the dimension lines into two segments at least as long as DIMGAP.
Text placed above or below the dimension line is moved inside only if there is room for the
arrowheads, dimension text, and a margin between them at least as large as
DIMGAP: 2 * (DIMASZ + DIMGAP).
DIMLFAC 144 Sets a scale factor for linear dimension measurements. All linear dimension distances,
including radii, diameters, and coordinates, are multiplied by DIMLFAC before being
converted to dimension text. Positive values of DIMLFAC are applied to dimensions in both
modelspace and paperspace; negative values are applied to paperspace only.
DIMLFAC applies primarily to nonassociative dimensions (DIMASSOC set 0 or 1). For
nonassociative dimensions in paperspace, DIMLFAC must be set individually for each layout
viewport to accommodate viewport scaling.
DIMLFAC has no effect on angular dimensions, and is not applied to the values held in
DIMRND, DIMTM, or DIMTP.
DIMLIM 72 Generates dimension limits as the default text. Setting DIMLIM to On turns DIMTOL off.
- 0 = Dimension limits are not generated as default text
- 1 = Dimension limits are generated as default text
DIMPOST 3 Specifies a text prefix or suffix (or both) to the dimension measurement.
For example, to establish a suffix for millimeters, set DIMPOST to mm; a distance of 19.2
units would be displayed as 19.2 mm. If tolerances are turned on, the suffix is applied to
the tolerances as well as to the main dimension.
Use "<>" to indicate placement of the text in relation to the dimension value. For example,
enter "<>mm" to display a 5.0 millimeter radial dimension as "5.0mm". If you entered mm
"<>", the dimension would be displayed as "mm 5.0".
DIMRND 45 Rounds all dimensioning distances to the specified value.
For instance, if DIMRND is set to 0.25, all distances round to the nearest 0.25 unit. If you
set DIMRND to 1.0, all distances round to the nearest integer. Note that the number of
digits edited after the decimal point depends on the precision set by DIMDEC. DIMRND does
not apply to angular dimensions.
DIMSAH 173 Controls the display of dimension line arrowhead blocks.
- 0 = Use arrowhead blocks set by DIMBLK
- 1 = Use arrowhead blocks set by DIMBLK1 and DIMBLK2
DIMSCALE 40 Sets the overall scale factor applied to dimensioning variables that specify sizes,
distances, or offsets. Also affects the leader objects with the LEADER command.
Use MLEADERSCALE to scale multileader objects created with the MLEADER command.
* 0.0 = A reasonable default value is computed based on the scaling between the current model
space viewport and paperspace. If you are in paperspace or modelspace and not using the
paperspace feature, the scale factor is 1.0.
* >0 = A scale factor is computed that leads text sizes, arrowhead sizes, and other scaled
distances to plot at their face values.
DIMSCALE does not affect measured lengths, coordinates, or angles.
Use DIMSCALE to control the overall scale of dimensions. However, if the current dimension
style is annotative, DIMSCALE is automatically set to zero and the dimension scale is
controlled by the CANNOSCALE system variable. DIMSCALE cannot be set to a non-zero value
when using annotative dimensions.
DIMSE1 75 Suppresses display of the first extension line.
- 0 = Extension line is not suppressed
- 1 = Extension line is suppressed
DIMSE2 76 Suppresses display of the second extension line.
- 0 = Extension line is not suppressed
- 1 = Extension line is suppressed
DIMSOXD 175 Suppresses arrowheads if not enough space is available inside the extension lines.
- 0 = Arrowheads are not suppressed
- 1 = Arrowheads are suppressed
If not enough space is available inside the extension lines and DIMTIX is on, setting
DIMSOXD to On suppresses the arrowheads. If DIMTIX is off, DIMSOXD has no effect.
DIMTAD 77 Controls the vertical position of text in relation to the dimension line.
- 0 = Centers the dimension text between the extension lines.
- 1 = Places the dimension text above the dimension line except when the dimension line is not
horizontal and text inside the extension lines is forced horizontal (DIMTIH = 1). The
distance from the dimension line to the baseline of the lowest line of text is the current
DIMGAP value.
- 2 = Places the dimension text on the side of the dimension line farthest away from the
defining points.
- 3 = Places the dimension text to conform to Japanese Industrial Standards (JIS).
- 4 = Places the dimension text below the dimension line.
DIMTFAC 146 Specifies a scale factor for the text height of fractions and tolerance values relative to
the dimension text height, as set by DIMTXT.
For example, if DIMTFAC is set to 1.0, the text height of fractions and tolerances is the
same height as the dimension text. If DIMTFAC is set to 0.7500, the text height of fractions
and tolerances is three-quarters the size of dimension text.
DIMTIH 73 Controls the position of dimension text inside the extension lines for all dimension types
except Ordinate.
- 0 = Aligns text with the dimension line
- 1 = Draws text horizontally
DIMTIX 174 Draws text between extension lines.
- 0 = Varies with the type of dimension. For linear and angular dimensions, text is placed
inside the extension lines if there is sufficient room. For radius and diameter dimensions
hat don’t fit inside the circle or arc, DIMTIX has no effect and always forces the text
outside the circle or arc.
- 1 = Draws dimension text between the extension lines even if it would ordinarily be placed
outside those lines
DIMTM 48 Sets the minimum (or lower) tolerance limit for dimension text when DIMTOL or DIMLIM is on.
DIMTM accepts signed values. If DIMTOL is on and DIMTP and DIMTM are set to the same value,
a tolerance value is drawn. If DIMTM and DIMTP values differ, the upper tolerance is drawn
above the lower, and a plus sign is added to the DIMTP value if it is positive. For DIMTM,
the program uses the negative of the value you enter (adding a minus sign if you specify a
positive number and a plus sign if you specify a negative number).
DIMTOFL 172 Controls whether a dimension line is drawn between the extension lines even when the text
is placed outside. For radius and diameter dimensions (when DIMTIX is off), draws a
dimension line inside the circle or arc and places the text, arrowheads, and leader outside.
- 0 = Does not draw dimension lines between the measured points when arrowheads are placed
outside the measured points
- 1 = Draws dimension lines between the measured points even when arrowheads are placed
outside the measured points
DIMTOH 74 Controls the position of dimension text outside the extension lines.
- 0 = Aligns text with the dimension line
- 1 = Draws text horizontally
DIMTOL 71 Appends tolerances to dimension text. Setting DIMTOL to on turns DIMLIM off.
DIMTP 47 Sets the maximum (or upper) tolerance limit for dimension text when DIMTOL or DIMLIM is on.
DIMTP accepts signed values. If DIMTOL is on and DIMTP and DIMTM are set to the same value,
a tolerance value is drawn. If DIMTM and DIMTP values differ, the upper tolerance is drawn
above the lower and a plus sign is added to the DIMTP value if it is positive.
DIMTSZ 142 Specifies the size of oblique strokes drawn instead of arrowheads for linear, radius, and
diameter dimensioning.
- 0 = Draws arrowheads.
- >0 = Draws oblique strokes instead of arrowheads. The size of the oblique strokes is
determined by this value multiplied by the DIMSCALE value
DIMTVP 145 Controls the vertical position of dimension text above or below the dimension line. The
DIMTVP value is used when DIMTAD = 0. The magnitude of the vertical offset of text is
the product of the text height and DIMTVP. Setting DIMTVP to 1.0 is equivalent to setting
DIMTAD = 1. The dimension line splits to accommodate the text only if the absolute value
of DIMTVP is less than 0.7.
DIMTXT 140 Specifies the height of dimension text, unless the current text style has a fixed height.
DIMZIN 78 Controls the suppression of zeros in the primary unit value. Values 0-3 affect
feet-and-inch dimensions only:
- 0 = Suppresses zero feet and precisely zero inches
- 1 = Includes zero feet and precisely zero inches
- 2 = Includes zero feet and suppresses zero inches
- 3 = Includes zero inches and suppresses zero feet
- 4 (Bit 3) = Suppresses leading zeros in decimal dimensions (for example, 0.5000 becomes .5000)
- 8 (Bit 4) = Suppresses trailing zeros in decimal dimensions (for example, 12.5000 becomes 12.5)
- 12 (Bit 3+4) = Suppresses both leading and trailing zeros (for example, 0.5000 becomes .5)
=================== ======= ==============================================================================================
Table Structure DXF R2000+
--------------------------
.. code-block:: none
0 <<< start of table
TABLE
2 <<< set table type
DIMSTYLE
5 <<< DIMSTYLE table handle
5F
330 <<< owner tag, tables has no owner
0
100 <<< subclass marker
AcDbSymbolTable
70 <<< count of dimension styles defined in this table, AutoCAD ignores this value
9
0 <<< 1. DIMSTYLE table entry
DIMSTYLE
<<< DIMSTYLE data tags
0 <<< 2. DIMSTYLE table entry
DIMSTYLE
<<< DIMSTYLE data tags and so on
0 <<< end of DIMSTYLE table
ENDTAB
Additional DIMSTYLE Variables DXF R13/14
----------------------------------------
Source: `CADDManager Blog`_
=================== ======= ==============================================================================================
DIMVAR code Description
=================== ======= ==============================================================================================
DIMADEC 179 Controls the number of precision places displayed in angular dimensions.
DIMALTTD 274 Sets the number of decimal places for the tolerance values in the alternate units of a
dimension.
DIMALTTZ 286 Controls suppression of zeros in tolerance values.
DIMALTU 273 Sets the units format for alternate units of all dimension substyles except Angular.
DIMALTZ 285 Controls the suppression of zeros for alternate unit dimension values. DIMALTZ values 0-3
affect feet-and-inch dimensions only.
DIMAUNIT 275 Sets the units format for angular dimensions.
- 0 = Decimal degrees
- 1 = Degrees/minutes/seconds
- 2 = Grad
- 3 = Radians
DIMBLK_HANDLE 342 defines DIMBLK as handle to the BLOCK RECORD entry
DIMBLK1_HANDLE 343 defines DIMBLK1 as handle to the BLOCK RECORD entry
DIMBLK2_HANDLE 344 defines DIMBLK2 as handle to the BLOCK RECORD entry
DIMDEC 271 Sets the number of decimal places displayed for the primary units of a dimension. The
precision is based on the units or angle format you have selected.
DIMDSEP 278 Specifies a single-character decimal separator to use when creating dimensions whose unit
format is decimal. When prompted, enter a single character at the Command prompt. If
dimension units is set to Decimal, the DIMDSEP character is used instead of the default
decimal point. If DIMDSEP is set to NULL (default value, reset by entering a period), the
decimal point is used as the dimension separator.
DIMJUST 280 Controls the horizontal positioning of dimension text.
- 0 = Positions the text above the dimension line and center-justifies it between the extension lines
- 1 = Positions the text next to the first extension line
- 2 = Positions the text next to the second extension line
- 3 = Positions the text above and aligned with the first extension line
- 4 = =Positions the text above and aligned with the second extension line
DIMSD1 281 Controls suppression of the first dimension line and arrowhead. When turned on, suppresses
the display of the dimension line and arrowhead between the first extension line and the
text.
- 0 = First dimension line is not suppressed
- 1 = First dimension line is suppressed
DIMSD2 282 Controls suppression of the second dimension line and arrowhead. When turned on, suppresses
the display of the dimension line and arrowhead between the second extension line and the text.
- 0 = Second dimension line is not suppressed
- 1 = Second dimension line is suppressed
DIMTDEC 272 Sets the number of decimal places to display in tolerance values for the primary units in a
dimension. This system variable has no effect unless DIMTOL is set to On. The default for
DIMTOL is Off.
DIMTOLJ 283 Sets the vertical justification for tolerance values relative to the nominal dimension text.
This system variable has no effect unless DIMTOL is set to On. The default for DIMTOL is Off.
- 0 = Bottom
- 1 = Middle
- 2 = Top
DIMTXSTY_HANDLE 340 Specifies the text style of the dimension as handle to STYLE table entry
DIMTZIN 284 Controls the suppression of zeros in tolerance values.
Values 0-3 affect feet-and-inch dimensions only.
- 0 = Suppresses zero feet and precisely zero inches
- 1 = Includes zero feet and precisely zero inches
- 2 = Includes zero feet and suppresses zero inches
- 3 = Includes zero inches and suppresses zero feet
- 4 = Suppresses leading zeros in decimal dimensions (for example, 0.5000 becomes .5000)
- 8 = Suppresses trailing zeros in decimal dimensions (for example, 12.5000 becomes 12.5)
- 12 = Suppresses both leading and trailing zeros (for example, 0.5000 becomes .5)
DIMUPT 288 Controls options for user-positioned text.
- 0 = Cursor controls only the dimension line location
- 1 = Cursor controls both the text position and the dimension line location
=================== ======= ==============================================================================================
Additional DIMSTYLE Variables DXF R2000
---------------------------------------
Source: `CADDManager Blog`_
=================== ======= ==============================================================================================
DIMVAR Code Description
=================== ======= ==============================================================================================
DIMALTRND 148 Rounds off the alternate dimension units.
DIMATFIT 289 Determines how dimension text and arrows are arranged when space is not sufficient to place
both within the extension lines.
- 0 = Places both text and arrows outside extension lines
- 1 = Moves arrows first, then text
- 2 = Moves text first, then arrows
- 3 = Moves either text or arrows, whichever fits best
A leader is added to moved dimension text when DIMTMOVE is set to 1.
DIMAZIN 79 Suppresses zeros for angular dimensions.
- 0 = Displays all leading and trailing zeros
- 1 = Suppresses leading zeros in decimal dimensions (for example, 0.5000 becomes .5000)
- 2 = Suppresses trailing zeros in decimal dimensions (for example, 12.5000 becomes 12.5)
- 3 = Suppresses leading and trailing zeros (for example, 0.5000 becomes .5)
DIMFRAC 276 Sets the fraction format when DIMLUNIT is set to 4 (Architectural) or 5 (Fractional).
- 0 = Horizontal stacking
- 1 = Diagonal stacking
- 2 = Not stacked (for example, 1/2)
DIMLDRBLK_HANDLE 341 Specifies the arrow type for leaders. Handle to BLOCK RECORD
DIMLUNIT 277 Sets units for all dimension types except Angular.
- 1 = Scientific
- 2 = Decimal
- 3 = Engineering
- 4 = Architectural (always displayed stacked)
- 5 = Fractional (always displayed stacked)
- 6 = Microsoft Windows Desktop (decimal format using Control Panel settings for decimal
separator and number grouping symbols)
DIMLWD 371 Assigns lineweight to dimension lines.
* -3 = Default (the LWDEFAULT value)
* -2 = BYBLOCK
* -1 = BYLAYER
DIMLWE 372 Assigns lineweight to extension lines.
* -3 = Default (the LWDEFAULT value)
* -2 = BYBLOCK
* -1 = BYLAYER
DIMTMOVE 279 Sets dimension text movement rules.
- 0 = Moves the dimension line with dimension text
- 1 = Adds a leader when dimension text is moved
- 2 = Allows text to be moved freely without a leader
=================== ======= ==============================================================================================
Text Location
-------------
This image shows the default text locations created by `BricsCAD`_ for dimension variables ``dimtad`` and ``dimjust``:
.. image:: gfx/dimtad-dimjust.svg
:align: center
:width: 800px
Unofficial DIMSTYLE Variables for DXF R2007 and later
-----------------------------------------------------
The following DIMVARS are **not documented** in the `DXF Reference`_ by Autodesk.
=================== ======= ============================================================================================
DIMVAR Code Description
=================== ======= ============================================================================================
DIMTFILL 69 Text fill 0=off; 1=background color; 2=custom color (see DIMTFILLCLR)
DIMTFILLCLR 70 Text fill custom color as color index
DIMFXLON 290 Extension line has fixed length if set to 1
DIMFXL 49 Length of extension line below dimension line if fixed (DIMFXLON is 1), DIMEXE defines the
the length above the dimension line
DIMJOGANG 50 Angle of oblique dimension line segment in jogged radius dimension
DIMLTYPE_HANDLE 345 Specifies the LINETYPE of the dimension line. Handle to LTYPE table entry
DIMLTEX1_HANDLE 346 Specifies the LINETYPE of the extension line 1. Handle to LTYPE table entry
DIMLTEX2_HANDLE 347 Specifies the LINETYPE of the extension line 2. Handle to LTYPE table entry
=================== ======= ============================================================================================
Extended Settings as Special XDATA Groups
-----------------------------------------
Prior to DXF R2007, some extended settings for the dimension and the extension lines are stored in the XDATA section by
following entries, this is not documented by `Autodesk`_:
.. code-block:: none
1001
ACAD_DSTYLE_DIM_LINETYPE <<< linetype for dimension line
1070
380 <<< group code, which differs from R2007 DIMDLTYPE
1005
FFFF <<< handle to LTYPE entry
1001
ACAD_DSTYLE_DIM_EXT1_LINETYPE <<< linetype for extension line 1
1070
381 <<< group code, which differs from R2007 DIMLTEX1
1005
FFFF <<< handle to LTYPE entry
1001
ACAD_DSTYLE_DIM_EXT2_LINETYPE <<< linetype for extension line 1
1070
382 <<< group code, which differs from R2007 DIMLTEX2
1005
FFFF <<< handle to LTYPE entry
1001
ACAD_DSTYLE_DIMEXT_ENABLED <<< extension line fixed
1070
383 <<< group code, which differs from R2007 DIMEXFIX
1070
1 <<< fixed if 1 else 0
1001
ACAD_DSTYLE_DIMEXT_LENGTH <<< extension line fixed length
1070
378 <<< group code, which differs from R2007 DIMEXLEN
1040
1.33 <<< length of extension line below dimension line
This XDATA groups requires also an appropriate APPID entry in the APPID table. This feature is not supported by `ezdxf`.
.. _DIMSTYLE: http://help.autodesk.com/view/OARX/2018/ENU/?guid=GUID-F2FAD36F-0CE3-4943-9DAD-A9BCD2AE81DA
.. _TABLES Section: http://help.autodesk.com/view/OARX/2018/ENU/?guid=GUID-A9FD9590-C97B-4E41-9F26-BD82C34A4F9F
.. _CADDManager Blog: http://www.caddmanager.com/CMB/2009/09/cad-standards-autocad-dimension-variables/
.. include:: ../reflinks.inc
|
