LayerIndex for an InstanceObject

My file is consists of several insert blocks, each of them have surfaces on a layer. I wanted to get all the objects on the layer and calculate their area. So I first get the object table of each InstanceObject using:

block.Document.Objects

But when I try to do .FindByLayer, it failed to recognize the layer and return a null array. Then I tried to get the layerindex and using .FindByFilter and I found that the index I get using .LayerIndex is different from the one the reference document is using. (i.e. the layer index in the reference document is different) I want to know how to get the actual layer index used in that document through the FullPath of a layer.

I am using python and rhino.common.

Thanks!!!

Replies to This Discussion

Permalink Reply by Odys on September 26, 2015 at 11:47pm

It seems that InstanceObject.Document returns the current document instead of the inserted document. Is it possible to access the linked document's layer table? Thanks!

Permalink Reply by David Rutten on September 27, 2015 at 2:10am

Instances might not contain a document, they may just be a collection of objects. I don't know enough about how Rhino deals with nested documents, you'll have to ask Rhino specific SDK questions on our discourse forum.

http://discourse.mcneel.com/

Permalink Reply by Odys on September 28, 2015 at 7:49pm

Thanks David. I got some help from that forum. For future reference, this sample file is very useful for getting all the instance references in a document.

https://github.com/dalefugier/SampleCsCommands/blob/master/SampleCs...

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