Scale 2-Point Persepctive?

mattw0711 · 26 Jul 2016, 14:46

Anyone have any thoughts or tips in bringing in a two-point perspective section cut scene from SU into LO, and have layout make it read at correct scale?

I know that being in perspective mode makes scaling not really work, but in theory, this could/should be done.

Meaning, the section cut itself, ignoring anything beyond, is technically in parallel projection, and really its a flat 2D cut and could/should be scale-able. But then the "beyond" portions are simply projected off of the cut, and obviously would not be to scale.

Any help or thoughts would be appreciated, thanks!

I've attached a quick image from SU of what i would like to show, just need to have LO produce the section cut to scale.

JQL · 26 Jul 2016, 14:53

Eneroth has a plugin for just that.

What I do is that I have 2 scenes. One with the perspective and a copy where I see only a section cut face group.

I place the section cut group viewport at the correct scale in layout, wich is easy as it's a 2D model, then you you copy that viewport and replace the scene in the model for the scene of the perspective.

This way I get double viewports and can manipulate the section face scene independently of the perspective scene (wich is exactly what I do on ortho sections too).

pbacot · 26 Jul 2016, 15:08

@jql said:

Eneroth has a plugin for just that.

There are plugins for LayOut?

JQL · 26 Jul 2016, 16:03

It's not for layout and I never used it, but it's a plugin that enables you to scale your perspective view in relationship to your screen resolution so you can translate it to Layout with a give scale.

I understood what was the purpose but, again, I never used it, so it might work in another way...

Here it is:

SketchUp Extension Warehouse

Your library of custom third-party extensions created to optimize your SketchUp workflow.

(extensions.sketchup.com)

pbacot · 26 Jul 2016, 16:20

Thanks! Eneroth is a genius!

mattw0711 · 26 Jul 2016, 16:30

Thanks for the heads up! I should have known there was a plug-in by Eneroth, she has a plug-in for everything!

Was a little awkward to use at first, but once i got the gist of it, worked perfect. Was able to use scaled dimensions in LO and they read the exact heights they were suppose to!

mattw0711 · 26 Jul 2016, 16:43

@jql said:

Eneroth has a plugin for just that.

What I do is that I have 2 scenes. One with the perspective and a copy where I see only a section cut face group.

I place the section cut group viewport at the correct scale in layout, wich is easy as it's a 2D model, then you you copy that viewport and replace the scene in the model for the scene of the perspective.

This way I get double viewports and can manipulate the section face scene independently of the perspective scene (wich is exactly what I do on ortho sections too).

The Eneroth plugin worked great, but i am curious about your 2-viewport method. Can you elaborate a little more on this process? Or potentially have files to share showing the scenes in SU and viewports in LO?

JQL · 26 Jul 2016, 17:14

You don't even need 2 viewports, I use them always though and I'm used to setting things up on sectioncutface viewport. So in LO you can:

Insert a perspective viewport;
Draw a line on the section through two points wich you know the dimension;
Scale it so it fits the desired dimension;
Write down the resulting scale factor;
Scale your viewport to the same scale factor;
Lock viewport scale;
Stretch it's boundaries to focus or have a wider view of the model.

mattw0711 · 26 Jul 2016, 17:37

@jql said:

You don't even need 2 viewports, I use them always though and I'm used to setting things up on sectioncutface viewport. So in LO you can:

Insert a perspective viewport;

Draw a line on the section through two points wich you know the dimension;

Scale it so it fits the desired dimension;

Write down the resulting scale factor;

Scale your viewport to the same scale factor;

Lock viewport scale;

Stretch it's boundaries to focus or have a wider view of the model.

Awesome, thanks for the quick reply. In actuality, you are doing the exact same thing that the plugin you referred me to does, just a different path to get there.

Totally makes sense, thanks again!

JQL · 26 Jul 2016, 22:59

@mattw0711 said:

Awesome, thanks for the quick reply. In actuality, you are doing the exact same thing that the plugin you referred me to does, just a different path to get there.

Totally makes sense, thanks again!

Then I remember why I'm not using it... She won't mind, I use a couple of her plugins daily...