topic Re: Changing BlockReference coordinate system from UCS to WCS in .NET Forum

Changing BlockReference coordinate system from UCS to WCS

rberghLJ4SA — Wed, 18 May 2022 10:32:00 GMT

Hi Guys,

I have a BlockReference object when I look at the object data the BlockTransform.CoordinateSystem is a ucs that was active when the block was placed.

Can I change the BlockReference object's Coordinate system to WCS and if it's possible how would I go about it.

Regards

Riaan

Re: Changing BlockReference coordinate system from UCS to WCS

_gile — Wed, 18 May 2022 13:36:44 GMT

Hi,

The BlockReference.BlockTransform matrix does not exactly match with the one of the active UCS during the block reference insertion because it does not take in account of this UCS origin.

Anyway, you can try to transform the block reference with the inverse matrix of the one returned by BlockReference.BlockTransform and change its position as you need.

br.TransformBy(br.BlockTransform.Inverse());

Re: Changing BlockReference coordinate system from UCS to WCS

rberghLJ4SA — Wed, 18 May 2022 13:43:24 GMT

Thanks I'll give it a try