Model.edit_transform for parent

cjthompson

Is there any way to get the local transformation for a component that is not at the end of the active path?

For example, say I double click a component, and then double click a component inside that one. I want to find the local transformation of the first.

TIG

model.edit_transform gives the current edit's transformation
To find the transformation of the 'first' parent you need to iterate down the tree until it's the one before 'model' - so something like...

### first you somehow set 'entities' to the current edit's entities set and find the parent e.g. 
parent=entities[0].parent
### then
done=false
until done
  if parent.entities[0].parent == Sketchup.active_model
    done=true
  else
    parent=parent.entities[0].parent
  end#if
end
### parent is now the first container ?
###

cjthompson

I can get the instance I'm looking for, but I'm having problems getting the actual transformation, since it is also in edit mode, but not the current edit mode.

I was able to find instance.local_transform, but it is undocumented.

Basically, I'm trying to use an input point to iterate up the model to find the component's path, instead of drilling down to find it.

TIG

instance.local_transformation seems to return nothing useful...
Working down towards Model will give you the entity's ultimate container - then you can find its transformation ?
If the final container is a component-definition then you're stuffed as you'll want the actual instances' transformation
You can't easily get the transformation of an entity inside an Instance of a Definition - get the entity's transformation within the Definition and then adjust it by the containing Instance's transformation [and then that's container's transformation etc etc] so you should somehow be able to apply that to the entity's too ?

Jim

I would guess the local_transformation method has its origin as part of Dynamic Components. It's not mentioned in the API docs at all.

cjthompson

It looks like its inherited from drawing element, so you can use it on faces and edges, too.

thomthom

Model.active_path
http://code.google.com/apis/sketchup/docs/ourdoc/model.html#active_path

use that to traverse the path up to the current

model.edit_transform * model.active_path.last.transform.inverse

thomthom

@cjthompson said:

Basically, I'm trying to use an input point to iterate up the model to find the component's path, instead of drilling down to find it.

Get help from a pickhelper?
http://code.google.com/apis/sketchup/docs/ourdoc/pickhelper.html

cjthompson

@thomthom said:

@cjthompson said:

Basically, I'm trying to use an input point to iterate up the model to find the component's path, instead of drilling down to find it.

Get help from a pickhelper?
http://code.google.com/apis/sketchup/docs/ourdoc/pickhelper.html

except you can't pick outside of edit mode.

I solved it by just drilling down the model structure, instead of going up it like the original idea.

thomthom

yes you can.
once you do a pick you get an array of various pick solutions.
.all_picked returns a list of all the top level entities for each possible path. .count return the number of possible paths. Use .path_at to get a drill down path for the given index.

cjthompson

sorry, I must be really tired today. I meant you can't use a pickhelper outside of the current context. so If you you have two instances in the model, and you double click one, you can't use the pickhelper on it's sibling.