topic Re: 3D window and clipping plane in Modeling

3D window and clipping plane

rgarand — Fri, 26 May 2023 13:06:59 GMT

Hi all,

I am having a problem when I orbit/explore in my 3D window. I have isolated the problem to the specific file. I have played around with all of the variables for the 3D window settings and have not been able to fix the problem.

The problem I am having is that when I orbit or explore, as I move around, my model gets clipped as if I have a clipping plane set up. The attached images show my model on the right when I start to explore and the model on the left is as I get closer to the model. Notice the model being clipped.

I have found a variable that I thought would solve my problem, but this does not work like I thought it would: 3D Window Settings> under OpenGL Options, the slider for "Always display all elements located within the following radius. When I set this to zero, nothing seems to happen, yet when I set this to a higher number the clipping plane seems to get further away from my camera.

Any thoughts?

Re: 3D window and clipping plane

Link — Thu, 13 Jul 2006 20:38:28 GMT

Sounds like OpenGL is culling your model.

According to the ArchiCAD 10 New Features Guide, This means that when you are navigating in 3D, OpenGL always calculates which parts of the whole 3D model will not be visible for the current frame at the current camera position, and will not calculate with those for that frame. This can increase the speed considerably, especially if you consider how much data you don’t have to process when your camera position puts most of the building behind the camera. Culling is part of OpenGL, so all graphics cards that support OpenGL (practically all graphics cards today) will be able to take advantage of this feature.

To alter that setting you need to adjust the 'Customize feedback speed in Frmes per Second' slider, or simply uncheck it.

Cheers,
Link.

Re: 3D window and clipping plane

Anonymous — Thu, 13 Jul 2006 21:29:45 GMT

A colleague of mine has experienced this too. Thanks for the tip, Link, I will pass it on to him.

Re: 3D window and clipping plane

alemanda — Wed, 16 Nov 2016 17:00:02 GMT

Sorry if I resume a so old topic but I was wondering if it is possible to have a clipping plane in archicad for small room rendering purpose.

Re: 3D window and clipping plane

Barry Kelly — Thu, 17 Nov 2016 01:45:34 GMT

alemanda wrote:
Sorry if I resume a so old topic but I was wondering if it is possible to have a clipping plane in archicad for small room rendering purpose.

Sounds like you want the '3D Cutting Planes'.
These can be set up and saved with your views.
And you can have multiple cutting planes in a view.
They can also be toggled on/off.

Barry.

Re: 3D window and clipping plane

alemanda — Thu, 17 Nov 2016 07:21:02 GMT

Thanks Barry ...
I know about 3D cutting planes ... I was taliking about clipping plane meaning camera clipping planes.
In other words I need to clip part of the 3D view in order to have a better rendering of small rooms; I need the 3D view to be clipped but considered during rendering process (light bounces, light sources, etc) ... is it possible to achieve with 3D cutting planes or somehow else in archicad?

Re: 3D window and clipping plane

Barry Kelly — Thu, 17 Nov 2016 07:31:37 GMT

I see - the cutting planes will physically cut part of the model away and will not be used for light and shadow.

So unless the settings Link posted about work I don't know any other method.
In 3D window settings it is now hidden behind the 'Advanced' button.
But I don't know if this will have any effect on renderings - just as you are navigation in 3D?

Barry.

Re: 3D window and clipping plane

alemanda — Thu, 17 Nov 2016 07:43:50 GMT

Barry, this was I was thinking ... 3D cutting planes cut phisically the model so sun light enters from the cut and missing part of the model ...
The first post of this topic speaks about a solved bug which reproduced a camera clipping plane ...
Well ... I would need that clipping plane ...

Re: 3D window and clipping plane

alemanda — Thu, 17 Nov 2016 08:00:55 GMT

I made a research in the registry keys hoping to find something but no ...
Clipping planes are very useful for interior rendering because they allow you to use higher focal (so no strong distortions of the image) for smaller rooms because they allow you to "look inside" ...

Look at this picture (taken from web)
http://1.bp.blogspot.com/-MqG12dEWwPY/UwdGwC8hgAI/AAAAAAAAJuE/6VlFNMsncLs/s1600/vrayforC4D-inquadrature-ambienti-piccoli-piani-clipping_04.jpg

On the left a image (not very close to human view) done using 15mm focal camera with no clipping plane
On the right an image (much closer to human view) done using 65mm focal camera with clipping plane