Topic: Insert Blocks and INSUNITS

[Bennos]

Hello,

I'm currently in the process of creating a class for BlockTableRecords, with in this class i have created an Insert function. Inserting blocks with known scales is not a problem, but i was after was some more information regarding to how autocad deals with the INSUNITS system variable. As when you do a manual insert, it rescales the block to suit the current INSUNITS variable. How is this conversion done, and how would i go about replicating it.

Thanks in advance

Bennos

[Kerry]

You may also want to have a look at the system variables INSUNITSDEFSOURCE and INSUNITSDEFTARGET

[Bennos]

You may also want to have a look at the system variables INSUNITSDEFSOURCE and INSUNITSDEFTARGET

Thanks Kerry, will check it out.

Found the problem, you need to set the blocktablerecords units value after you add it to the block table.

[Kerry]

I've just had a scan of the Managed Class docs

Autodesk.AutoCAD.DatabaseServices.BlockTableRecord Properties
has a Property .Units

You may be able to make use of this.

[Bennos]

I've just had a scan of the Managed Class docs

Autodesk.AutoCAD.DatabaseServices.BlockTableRecord Properties
has a Property .Units

You may be able to make use of this.

Thanks for the tip, i have the blocktablerecord units property to the insunits form the source database.

Have another problem, how does autocad determine the scale between millimeters and meters, ie 0.001 and feet to millimeters i.e 304.8.
I need to scale my blockreference to these scales for them to insert at the scaled size.

[Kerry]

If I understand the question ...

Some of the more common INSUNITS <UnitsValue Field> settings include:
0 = Unspecified (No units)
1 = Inches
2 = Feet
4 = Millimeters
6 = Meters

Would you just factor according to the setting ?

Source 4 to Target 6  is * 0.001
6 to 4 is * 1000
4 to 1 is * 0.0393700787402...
.. etc
( OR the other way around )

[Bennos]

If I understand the question ...

Some of the more common INSUNITS <UnitsValue Field> settings include:
0 = Unspecified (No units)
1 = Inches
2 = Feet
4 = Millimeters
6 = Meters

Would you just factor according to the setting ?

Source 4 to Target 6  is * 0.001
6 to 4 is * 1000
4 to 1 is * 0.0393700787402...
.. etc
( OR the other way around )

Good point, will probably go with your option. Thanks for your help.

[Bennos]

If I understand the question ...

Some of the more common INSUNITS <UnitsValue Field> settings include:
0 = Unspecified (No units)
1 = Inches
2 = Feet
4 = Millimeters
6 = Meters

Would you just factor according to the setting ?

Source 4 to Target 6  is * 0.001
6 to 4 is * 1000
4 to 1 is * 0.0393700787402...
.. etc
( OR the other way around )

Good point, will probably go with your option. Thanks for your help.

Found the DatabaseServices.UnitConverter.GetConversionFactor
This does the convertion for all the unit types.

[Kerry]

Good find , that's comforting to hear, I think.  ... persistance IS rewarded. !!