[Radiance-general] AUTOREPLY Radiance-general Digest, Vol 150, Issue 9

Tue Aug 23 12:07:14 PDT 2016

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Today's Topics:

   1. Frozen Octree instances in a different location (Terrance McMinn)
   2. Re: Frozen Octree instances in a different location
      (Terrance McMinn)
   3. Re: Frozen Octree instances in a different	location (Greg Ward)

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Message: 1
Date: Tue, 23 Aug 2016 22:55:18 +0800
From: Terrance McMinn <t.mcminn at ocpms.com.au>
To: radiance-general at radiance-online.org
Subject: [Radiance-general] Frozen Octree instances in a different
	location
Message-ID: <6e32410e-2f64-2c95-411d-c36669290d73 at ocpms.com.au>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

I have a Sketchup model with two layers: Building and Site

Due to the export time (su2rad) of the Site layer, I figured I could 
switch off the building layer and export the site once create a frozen 
octree (oconv -f materials.rad Scene1.rad > octrees/frozen-site.oct) 
then instance the site back into the building project with a simple 3 
line file:

void instance site_instance
1 octrees/frozen-site.oct
0
0

The unexpected result is that the site is offset to the building. I did 
not expect to need to add transform arguments (X, Y, Z) to the instance 
definition:

void instance site_instance
5 octrees/frozen-site.oct -t X Y Z
0
0

Am I missing something fundamental and just need to experimentally 
determine the offset?

-- 
Regards
*Terrance McMinn*
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Message: 2
Date: Tue, 23 Aug 2016 23:08:07 +0800
From: Terrance McMinn <t.mcminn at ocpms.com.au>
To: radiance-general at radiance-online.org
Subject: Re: [Radiance-general] Frozen Octree instances in a different
	location
Message-ID: <bc1dde59-0e75-35ca-76d0-113d0e3b2811 at ocpms.com.au>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

Please ignore the previous post, further investigation indicates that 
the problem is not a positional issue.

The frozen octree is behaviour in the expected fashion.
-- 
Regards
*Terrance McMinn*
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Message: 3
Date: Tue, 23 Aug 2016 10:22:01 -0700
From: Greg Ward <gregoryjward at gmail.com>
To: Radiance general discussion <radiance-general at radiance-online.org>
Subject: Re: [Radiance-general] Frozen Octree instances in a different
	location
Message-ID: <BB15F60F-E95E-475D-A293-3FB270FF03D4 at lmi.net>
Content-Type: text/plain; charset="us-ascii"

Hi Terrance,

Glad you sorted it out.  Another trick that works and is slightly more efficient is to create a "partial octree" containing your scene except building, then add to it, i.e.:

	oconv -f materials.rad Scene1.rad > octrees/frozen-site.oct
	oconv -f -i octrees/frozen-site.oct Building1.rad > octrees/building1-site.oct
	(make a second version of building)
	oconv -f -i octrees/frozen-site.oct Building2.rad > octrees/building2-site.oct

The above will work without the -f option, also, if you want your octree files to be a little smaller and you don't plan to move them about.  Adding geometry to an existing octree can be much faster than rebuilding the whole thing from scratch.  The one caveat is that your new geometry must fit entirely within the bounding box of the original geometry.  If it will not, you can use the -b option in the first oconv to specify a bounding volume that encompasses everything.

Cheers,
-Greg

> From: Terrance McMinn <t.mcminn at ocpms.com.au>
> Date: August 23, 2016 7:55:18 AM PDT
> 
> I have a Sketchup model with two layers: Building and Site
> 
> Due to the export time (su2rad) of the Site layer, I figured I could switch off the building layer and export the site once create a frozen octree (oconv -f materials.rad Scene1.rad > octrees/frozen-site.oct) then instance the site back into the building project with a simple 3 line file:
> 
> void instance site_instance
> 1 octrees/frozen-site.oct
> 0
> 0
> The unexpected result is that the site is offset to the building. I did not expect to need to add transform arguments (X, Y, Z) to the instance definition:
> 
> void instance site_instance
> 5 octrees/frozen-site.oct -t X Y Z
> 0
> 0
> Am I missing something fundamental and just need to experimentally determine the offset?
> -- 
> Regards
> Terrance McMinn
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