CADSoftTools

Hi,

I'm using CAD .NET 10.2 and to parse DWG files. I need to obtain the unit used. In AutoCAD the unit is set to Inches, however, after the file is loaded the DWGImage.Converter.HeadStruct.InsUnits property is set to Unitless. I saw the following post:

http://cadsofttools.com/forum/viewtopic ... nit#p12679

but it does not work in my case.

Thanks,
Latchezar

Hello Latchezar,

Could you check what value of a Block unit setting is displayed in a Block Definition dialog box when a DWG file is opened in AutoCAD? For example:



Mikhail

Hi Mikhail,

Yes - all block units are set Inches. However, when I access the Converter.HeadStruct.InsUnits property of a particular block the value is set to "Unitless". In addition the "Converter" instance is the same for all blocks and the drawing itself even though each block can have a different unit.

The AutoCAD version used is 2013.

Thanks,
Latchezar

Hello Latchezar,

In addition the "Converter" instance is the same for all blocks and the drawing itself even though each block can have a different unit.

CADBlock.Converter contains a reference to CADImage.Converter which is the same for all objects in a drawing, so each block will have units specified by a CADImage.Converter.HeadStruct.InsUnits property. Actually, the CADImage.Converter.HeadStruct.InsUnits contains a value of INSUNITS variable that is saved in the drawing file. You may try to save a DWG file to the DXF format, open the DXF file in Notepad and search for $INSUNITS entry. INSUNITS variable value goes after a 70 group code.


Mikhail