Dimensions
autocad_entity: autocad_dimension
Dimensions are aggregate features used in AutoCAD to specify dimensions within an AutoCAD drawing. The dimension features have the attributes described below.
Aligned dimensions:
defpt2
is the endpoint of the first extension line.defpt3
is the endpoint of the second extension line.dimlinedefpt
specifies the dimension line.
Rotated (linear) dimensions:
 The first extension line is specified by defpt2.
 The second extension line is specified by defpt3.
 The dimension line is specified by dimlinedefpt.
Angular dimensions:
defpt2
is the startpoint of the first extension line.defpt3
is the endpoint of the first extension line.defpt4
is the startpoint of the second extension line.dimlinedefpt
is the endpoint of the second extension line.arcdefpt
specifies the dimension line arc.
Angular 3point dimensions:
defpt2
is the endpoint of the first extension line.defpt3
is the endpoint of the second extension line.defpt4
is the center point of the arc.dimlinedefpt
specifies the dimension line arc.
Diameter dimensions:
defpt4
is the point selected on the circle or arc being dimensioned.dimlinedefpt
is the point on the circle exactly across from the selection point.
Radial dimensions:
defpt4
is the point selected on the circle or arc being dimensioned.dimlinedefpt
is the center point of the circle or arc.
Diameter dimensions:
 defpt4 is the point selected on the circle or arc being dimensioned.
 dimlinedefpt is the point on the circle exactly across from the selection point.
Ordinate dimensions:
defpt2
is the point which was selected.defpt3
is the endpoint of the leader.dimlinedefpt
is the origin definition point of the dimension.
Arc length dimensions:
defpt2
is the endpoint of the first extension line.defpt3
is the endpoint of the second extension line.defpt4
is the center point of the arc.dimlinedefpt
specifies the dimension arc.
Attribute Name 
Contents 

autocad_actual_measurement 
The scale factor for the inserted block in the x direction. Range: 64bit floating point number Default: 1 
autocad_arc_defpt.x 
This defines the dimension arc for an angular dimension. This is equivalent to the 16,26,36 group in DXF. Range: 64bit floating point number Default: No default 
autocad_arc_defpt2.x 
Definition Point. This is equivalent to the 13,23,33 group in DXF. Range: 64bit floating point number Default: No default 
autocad_arc_defpt3.x 
Definition Point. This is equivalent to the 14,24,34 group in DXF. Range: 64bit floating point number Default: No default 
autocad_arc_defpt4.x 
Definition Point. This is equivalent to the 15,25,35 group in DXF. Range: 64bit floating point number Default: No default 
autocad_dim_arc_is_partial 
Flag for arc length dimensions indicating that the arc is specified by only two points. Range: 0 for false  1 for true Default: 0 
autocad_dim_arc_start_param 
The arc parameter for the arc corresponding to the start point of the arc length dimension. Range: 64bit floating point number Default: 0.0 
autocad_dim_arc_end_param 
The arc parameter for the arc corresponding to the end point of the arc length dimension. Range: 64bit floating point number Default: 0.0 
autocad_dim_arc_symbol_type 
The indicates the use of an arc symbol with the text of an arc length dimension, as defined 0 = arc symbol precedes text 1 = arc symbol is above text 2 = no arc symbol is used Range: 0..2 Default: No default 
autocad_dim_leader_pt1.x autocad_dim_leader_pt1.y autocad_dim_leader_pt1.z 
Start point for an optional extra leader for an arc length dimension. Range: 64bit floating point number Default: No default 
autocad_dim_leader_pt2.x autocad_dim_leader_pt2.y autocad_dim_leader_pt2.z 
End point for an optional extra leader for an arc length dimension. Range: 64bit floating point number Default: No default 
autocad_dimension_attach_point 
This is the attachment point of dimension, as defined

autocad_dim_arrowhead_pt_<number>.x autocad_dim_arrowhead_pt_<number>.y 
These attributes, provided by the reader but not used by the writer, describe the x,y coordinates of the vertex, on each arrowhead, that could be called the “tip of the arrow.” <number> is some number between 1 and the number of arrowheads in the dimension. If there are no arrowheads, then this attribute will not be supplied. 
autocad_dimension_flag 
This is the raw value from the AutoCAD file that indicates the type of dimension. See autocad_dimension_type for the decoded version of this. 
autocad_dimension_style_name 
The name of the dimension style used. When using the AutoCAD writer, it is important that the dimension style used is defined in the template file; otherwise, no style will be set and the dimension text will not be displayed. Even if the standard dimension style is used, the template file must hold a definition for it. 
autocad_dimension_type 
This indicates the type of the autocad dimension. Possible values are:

autocad_leader_length 
This is the length of the dimension leader line. 
autocad_linespace_style 
This is the style of the line spacing. It is either 1 (at least) or 2 (exact). 
autocad_linespace_factor 
The percentage of default line spacing used. Range: 0.25..4.0 Default: 1 
autocad_rotation_angle 
The rotation angle of the dimension. 
autocad_text_midpoint.x 
The midpoint of the text. 
autocad_text_rotation 
The rotation of the dimension text. 
autocad_text_size 
The size of the text in ground units. 
autocad_dim_original_text_size 
The original text size of a scaled annotative dimension. 
autocad_text_string 
The dimension text value. 
autocad_ucs_xangle 
The angle of the ucs (user coordinate system) when the dimension was created. 