Is there a way to see if a set of components intersect/overlap???

I want to make sure my parts do not hit each other.

Unbelievably great answer. I shall read it multiple times to make sure I get it all.

Ok I went to make my viewports transparent as you suggested and actually found your post here http://sketchucation.com/forums/viewtopic.php?f=79%26amp;t=63380 confirming how this is to be done. It did not work. Is this because of the Layout 2017 bug seen here https://forums.sketchup.com/t/transparent-style-views-rendering-opaque-in-layout-2017/35331/10 or am I doing something wrong (the sketchup background was set to white)?

Thanks again

Dave R

Your private message was very very helpful! I now see why i was having some problems. Particularly Layers! Your suggestion is simple: Groups and components on layers<>0 everything else even when within a group or comp on layer 0. (perhaps my experience as an object oriented programmer caused me to do otherwise).

I cannot reply privately yet as i am still a newbie. My email is dan dot pressman at ntuple do com

A couple of things:

While I understand your solution for the hidden edges (which are as you point out back edges in my case) what I do not understand is why on first insertion of the "Last Used ..." scene the back edges are visible as dashes?

So there is a difference between a back edge and a hidden line. Perhaps this would be a great topic for someone to post. In the meantime this is my understanding: OK my father always said that you do not understand something unless you can teach/explain it - that is what I found when trying to write up my understanding.

Attached please find a skp file I was using to try to write this up. I was wondering: a back edge is a special case of a hidden line. It is one that is within the same solid object or alternatively within the same group or component.

Part of my problem may be that I have modified the original Hidden line style. Is there a way to return to the original as delivered or could you let me know the settings?

I have leaned on you quite a bit but it has been great for me and i really appreciate it. Please answer only if you have time.

Thanks

HiddenLine vs Back Edge.layout

I will make time for you whenever.

I may have forgotton to add files

Moving Bookcase.zip

Moving Bookcase.7z

I am sorry i forgot to attach. I have now done so and have included the skp and layout files. On page 2 of layout you will find a viewport with the "Last Used ..." view.

If you will change it to "Bookcase - Moving Outer Left" you should see results similar to those reported in image 2017-09-19_14-36-38.png:

PS I thought I sent this last night - but I guess i did not if I did please forgive double submission.

Moving Bookcase.7z

Same as above but winzip

Point taken - will do!

Sorry I forgot the screen grabs

Also sent a skp and layout file in layout see page 2 and change the scene from "Last Used ..." to "Bookcase - Moving Outer Left" to replicate what happened in

2017-09-19_14-36-38.png: On first selection of scene "Bookcase - Moving Outer Left" the selection remains "raster" and no image appears.

Thanks for your time and interest!

Moving Bookcase.7z

Moderator please feel free to respond directly if you do not think this is worth posting.

How do you use the ordered list icon? I tried all sorts of versions and could not get it to work. Are there instructions someplace?