[Radiance-general] 答复: Render tregenza sky patches by rcontrib and pcomb

[Sarith Subramaniam]

Hi Clarence,



The commands for rendering Tregenza Sky Patches with rfluxmtx, which 
Greg was referring to, can be found here: 
https://github.com/sariths/radTutorialFiles/blob/master/room/commands/2PM_Sky.sh. 
The instructions for using those files can be found in the main page of 
the repository: https://github.com/sariths/radTutorialFiles


If you are interested in rendering sky patches with random colors, as 
shown in Axel's tutorial, try this python script: 
https://gist.github.com/sariths/f16147efc83376c1f9c11c2f5ad24a20



Sarith


On 10/11/2017 10:15 PM, Wang Clarence wrote:
> Thanks for the advice.
>
> I have tried, but the "result.hdr" was not a format of picture, which 
> meant that the rendering was failed.
>
> #gensky 3 21 10 +s -a 22 -o 114 | genskyvec -m 1 -c 1 1 1 > 
> tmp_skydist.dat
>
> #vwrays -ff $vw |rcontrib @rtc1.opt -ffc $(vwrays -d $vw) -V+ -f 
> tregenza.cal -b tbin -bn Ntbins -o first_tre_p%d.hdr -m skyglow 
> test_sky_sun.oct
>
> #dctimestep first_tre_p%d.hdr tmp_skydist.dat > combine.hdr
>
> Or, any parameters should be needed in the third line?
>
> Best,
>
> Clarence
> ------------------------------------------------------------------------
> *发件人:* Greg Ward <gregoryjward at gmail.com>
> *发送时间:* 2017年10月11日 18:09
> *收件人:* Radiance general discussion
> *主题:* Re: [Radiance-general] Render tregenza sky patches by rcontrib 
> and pcomb
> Hi Clarence,
>
> Rather than trying to fix Axel's old script, it's better to use the 
> simpler and more efficient dctimestep method:
>
> dctimestep first_tre_p%d.hdr skydist.dat > result.hdr
>
> You can also simplify the rcontrib step using the rfluxmtx program, 
> but what you have is fine.
>
> Cheers,
> -Greg
>
>> *From: *Wang Clarence <wangjuncwz at hotmail.com 
>> <mailto:wangjuncwz at hotmail.com>>
>>
>> *Date: *October 11, 2017 6:27:45 AM PDT
>>
>> *
>> *
>>
>> Dear all,
>>
>> I've been trying to render the Tregenza sky patches by using 
>> rcontrib. Each patch was rendered successfully, but when I use 
>> "pcomb" which contains "tregsamp.bash" by Axel Jacobs to combine 
>> them, the "combined.hdr" was a black picture.
>>
>> #vwrays -ff $vw |rcontrib @rtc1.opt -ffc $(vwrays -d $vw) -V+ -f 
>> tregenza.cal -b tbin -bn Ntbins -o first_tre_p%d.hdr -m skyglow 
>> test_sky_sun.oct
>>
>> #pcomb -h $(bash apply_tregsamp_1.bash) > combine_1.hdr
>>
>> #the original bash script below by Axel Jacobs was changed in order 
>> to be consistent with my code.
>>
>>
>> # Path to the patch images
>>
>> imgpath="image_fisheye/patches_tre/first_tre"
>>
>> for i in $imgpath_*.hdr; do
>>         # Scan patch number from file name
>>           patch=$(ls $i \
>>                           |rcalc -i "$imgpath_p\${pnum}.hdr" \
>>                            -e "\$1=pnum")
>>         # Get multiplier from dat file, based on record number
>>           multi=$(cat tmp_skydist.dat \
>>                           |rcalc -e 
>> "diff=$patch-recno+1;absdiff=if(diff,diff,-1*diff);
>>
>>  \$1=if(absdiff,0,\$1);" |total)
>>           echo " -s $multi $i"
>>
>> done
>>
>>
>>
>> #EOF
>>
>> Thanks,
>>
>> Clarence
>
>
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