[Radiance-general] Radiance-general Digest, Vol 142, Issue 5

[Per Haugaard]

Hi group,
I have put the octree info and the picture for my rendering at http://phaugaard.blogspot.dk/2015/12/two-clipping-boxes.html Both clipping boxes are quite big and cut off one side and the top respectively. The only thing that is removed in the pictere is where the two clipping boxes intersect.
I am not familiar with the second option mentioned in the paper (used to "peek into" a space while preserving the geometry for the traced rays).
How does the second option work?
Once again thank you for your help.

Best regards
Per Haugaard

 


    Den 21:01 torsdag den 3. december 2015 skrev "radiance-general-request at radiance-online.org" <radiance-general-request at radiance-online.org>:
 

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Today's Topics:

  1. Using two clipping boxes in visualization of    lighting
      distribution (Per Haugaard)
  2. Re: Using two clipping boxes in visualization of lighting
      distribution (Guglielmetti, Robert)


----------------------------------------------------------------------

Message: 1
Date: Thu, 3 Dec 2015 14:34:32 +0000 (UTC)
From: Per Haugaard <perhaugaard at yahoo.dk>
To: Radiance General Discussion <radiance-general at radiance-online.org>
Subject: [Radiance-general] Using two clipping boxes in visualization
    of    lighting distribution
Message-ID:
    <379352180.24236382.1449153272917.JavaMail.yahoo at mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"

Dear group,
I would like to use?two clipping boxes to "cut off" the top and side in my model to better visualize lighting distribution in my design.I have tried to include two clipping boxes in a clipping box octree:
oconv objects/BOX_top.rad objects/BOX_PL2-3.rad > octrees/Clipping_box.oct

I then use vwrays for illustration:
vwrays -fd -vf views/View_perspective.vf -x 1000 -y 1000 | rtrace -w -h -fd -opd octrees/Clipping_box.oct | rtrace -w -ab 1 -fdc `vwrays -d -vf views/View_perspective.vf -x 1000 -y 1000` octrees/office.oct > images/office.pic

My problem is that the only things that seem to be "cut off" is the intersecting part of the two boxes.
Is there a way to work with two clipping boxes to "cut off" the top and side in a model for better visualization of the lighting distribution?
Any input is much appreciated.

Best regards
Per Haugaard
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Message: 2
Date: Thu, 3 Dec 2015 14:49:18 +0000
From: "Guglielmetti, Robert" <Robert.Guglielmetti at nrel.gov>
To: Per Haugaard <perhaugaard at yahoo.dk>, Radiance general discussion
    <radiance-general at radiance-online.org>
Subject: Re: [Radiance-general] Using two clipping boxes in
    visualization of lighting distribution
Message-ID: <D285A323.200E6%Robert.Guglielmetti at nrel.gov>
Content-Type: text/plain; charset="us-ascii"

That looks a lot like the technique John M. details here (http://radsite.lbl.gov/radiance/refer/Notes/jm_technote_02.pdf), but it seems like you're using the first technique (used to mask arbitrarily shaped, adjacent obstructions) and really want the second one (used to "peek into" a space while preserving the geometry for the traced rays. Could you post images of the result, as well as images of each octree you're using?

On 12/3/15, 7:34 AM, "Per Haugaard" <perhaugaard at yahoo.dk<mailto:perhaugaard at yahoo.dk>> wrote:

Dear group,

I would like to use two clipping boxes to "cut off" the top and side in my model to better visualize lighting distribution in my design.
I have tried to include two clipping boxes in a clipping box octree:

oconv objects/BOX_top.rad objects/BOX_PL2-3.rad > octrees/Clipping_box.oct

I then use vwrays for illustration:

vwrays -fd -vf views/View_perspective.vf -x 1000 -y 1000 | rtrace -w -h -fd -opd octrees/Clipping_box.oct | rtrace -w -ab 1 -fdc `vwrays -d -vf views/View_perspective.vf -x 1000 -y 1000` octrees/office.oct > images/office.pic

My problem is that the only things that seem to be "cut off" is the intersecting part of the two boxes.

Is there a way to work with two clipping boxes to "cut off" the top and side in a model for better visualization of the lighting distribution?

Any input is much appreciated.


Best regards

Per Haugaard



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