[Radiance-general] rpict and rtrace viewpoint differences?
Chris Coulter
Chris.Coulter at BuroHappold.com
Wed Mar 19 06:57:13 PDT 2014
George,
My guess would be the -vh and -vv included in your rpict command. These will change the x and y mappings of your view.
Are they the same values in your view.vf file? If so, they are redundant and could be misleading in the future. If not, this is why your rpict and rtrace images do not align (vwrays is generating a different set of rays).
Sorry, but I don't have a quick answer/suggestion for your other questions.
Hope this helps.
Chris
-----Original Message-----
From: P George Lovell [mailto:p.g.lovell at st-andrews.ac.uk]
Sent: Wednesday, March 19, 2014 7:55 AM
To: Radiance general discussion
Subject: [Radiance-general] rpict and rtrace viewpoint differences?
Dear Radiance People.
I'm rendering scenes with both rpict and rtrace and I noticed some discrepancies between them. Despite both using the same view point definitions my images differ between the two renders: (the scene shows a green rectangular panel, a green elipsoid, some sky, green ground).
1) the rpict image (top in the attached file) seems to normalize the sky values so that they aren't too bright.
2) the rtrace image has a subtly different viewpoint.
Three questions:
1) Can you tell me which command arguments determine the way that image values are clipped or remapped?
2) Can I specify the same clipping in rtrace?
3) Why are the views different despite using the same viewpoint?
Here are the commands I'm running, in the sequence that they are executed.
rpict -vf view.vf -x 2400 -y 2400 -vh 28.07 -vv 28.07 -ps 2 -pt 0.03
-pj 0.95 -dj 0.85 -ds 0.09 -dt 0.03 -dc 0.75 -dr 5 -dp 0 -sj 0.85 -ab 5
-ar 64 -ad 2048 -as 1024 -lr 12 -lw 0.001 wholeScene.rpict
pfilt -x /1 -y /1 -rad 0.60 wholeScene.rpict > wholeScene.pic
vwrays -vf view.vf -x 2400 -y 2400 >surfaces.txt
rtrace -h -osv wholeScene.oct < surfaces.txt > rtrace_surfaces.txt
Best wishes,
George
--
Dr P. George Lovell,
Lecturer in Psychology
University of Abertay Dundee
Dundee
DD1 1HG
Tel 01382-308581
Fax 01382-308749
Researcher/Co-investigator,
School of Psychology, University of St Andrews
RM 2.27 (The Yellow Room).
Phone (01334) 463056
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