[Radiance-general] rtcontrib issue (stuck on p.16 of understanding rtcontrib tutorial)

[kyle konis]

noted, thanks

-Kyle

On Sat, Jun 30, 2012 at 4:51 PM, Greg Ward <gregoryjward at gmail.com> wrote:
> Hi Kyle,
>
> Patch 0 is indeed the ground plane.  If you didn't specify a ground in your scene description (i.e., no source with negative-Z) then this will be black.  Photosphere doesn't know what to do when you give it a black HDR image.
>
> -Greg
>
>> From: kyle konis <kskonis at gmail.com>
>> Date: June 30, 2012 4:37:07 PM PDT
>>
>> I have added the -bn option and now have a good batch of sky subdivisions.
>>
>> vwrays -ff $vw | rtcontrib -bn 146 @rtc.opt -ffc \
>> $(vwrays -d $vw) -V+ -f tregenza.cal -b tbin  \
>> -o images/patches/p%03d.hdr \
>> -m sky_glow testroom_whitesky.oct
>>
>> and a nice visualization with Andy's previous response to Ji:
>>
>> cnt 146 | rcalc -e '$1=rand(recno);$2=rand(recno+.3);$3=rand(recno+.7)' | \
>> dctimestep ./images/patches/p%03d.hdr > ./images/sky_colorcomb.hdr
>>
>>
>> ...
>>
>> I am still a bit confused regarding patch p000.hdr
>>
>> When i attempt to open in Photosphere, i get :  "Cannot map HDR pixels
>> in MapSubimage"
>>
>> Since the sky only needs 145 patches, the purpose of this p000.hdr is
>> a mystery.  (Although i recall reading something about is purpose late
>> last night . . .  a placeholder for the ground reflection if it is
>> added  . . . ?)
>>
>>
>> -Kyle
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general