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

[Greg Ward]

Hi Clarence,

This should be correct.  What version of Radiance do you have?  (I.e., what does "rpict -version" return?)

Does it report any error at all?  Is the output file completely empty?

It works when I run it using 5.1, and I'm pretty sure it will work for anything later than the 4.1 release, which was in 2011.

Cheers,
-Greg

> From: Wang Clarence <wangjuncwz at hotmail.com>
> Date: October 11, 2017 8:15:46 PM PDT
> 
> 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>
>> 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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