I wrote this function to reset the axes to the center. I had to transform all the entities in the group. I don't think there is an easier way.

def resetAxis(ent) cd=ent.definition realBounds= Geom::BoundingBox.new cd.entities.each{|de| realBounds.add(de.bounds)} #Calculate the real bounding box of the entities in the component. center=Geom::Point3d.new(0,0,0) #desired center. if(realBounds.center!=center) #if not already centered #transform all the entities to be around the new center

cd.entities.transform_entities(Geom::Transformation.new( center- realBounds.center), cd.entities.to_a) #move each instance of this component to account for the entities moving inside the component. cd.instances.each{|ci| #ci.transform!(realBounds.center);

#newXform=(ci.transformation.inverse*Geom::Transformation.new(realBounds.center))*ci.transformation #ci.transform!(newXform)

newCenter=realBounds.center.transform(ci.transformation) ci.transform!(newCenter-ci.transformation.origin) } end end

If you want to pass it a group use this: class Sketchup::Group def definition # make it so you can use group.definition return(entities[0].parent) end end

Note it changes the definition of group to add a .definition method. This makes group more similar to componentInstance.

On Jul 13, 3:15 am, BillW wrote: