[Radiance-general] partly covered source

[giulio antonutto]

but did you try to oversample?
let's say run 100 times and get the average at each point…

On 24 Jul 2012, at 20:50, Jan Wienold wrote:

> Hi Giulio, hi all,
> 
> unfortunately it doesn't work out safely. In total I have many, many cases to look at (in total 40000 timesteps x 33 points x 2geometries) and there are still many cases, when rtrace doesn't catch the sun.
> Since these are calculations for an expertise, which is used for a trial, I have to be absolutely sure not to miss any case...
> 
> Is there any idea except calculating images ? Source subdivisions are unfortunately not possible when "source" is used...
> 
> Thanks!
> 
> Jan
> 
> 
> 
> On 07/24/2012 02:13 AM, Jan Wienold wrote:
>> hi giulio,
>> 
>> Yes!
>> The use of -dj helped, but only if I use also the -u option. Otherwise I still get randomized zero values, also if I change -ds.
>> 
>> thanks!
>> 
>> jan
>> 
>> 
>> 
>> 
>> On 07/24/2012 01:35 AM, giulio antonutto wrote:
>>> Jan,
>>> maybe you can fix it with -dj and oversampling?
>>> G
>>> 
>>> On 24 Jul 2012, at 00:03, Jan Wienold wrote:
>>> 
>>>> Hi all,
>>>> 
>>>> I just encountered a strange different behavior between rtrace and rpict:
>>>> If the sun ( using "source") is  covered in large parts (in that case more than half) I can still "see" the uncovered parts in the image (=>this is what I expect). In case I calculate at the same point and in the same direction the illuminance with rtrace -I, I get zero contribution.  Is just the center of the source description tested in that case? Any solution for this for rtrace?
>>>> I just look for the sun, no sky description and use only direct calculation (-ab 0) .
>>>> 
>>>> Thanks,
>>>> 
>>>> Jan
>>>> 
>>>> 
>>>> 
>>>> -- 
>>>> Dr.-Ing. Jan Wienold
>>>> Head of Team Passive Systems and Daylighting
>>>> Fraunhofer-Institut für Solare Energiesysteme
>>>> Thermal Systems and Buildings
>>>> Heidenhofstr. 2, 79110 Freiburg, Germany
>>>> Phone: +49(0)761 4588 5133 Fax:+49(0)761 4588 9133
>>>> jan.wienold at ise.fraunhofer.de
>>>> http://www.ise.fraunhofer.de
>>>> 
>>>> In office:
>>>> Mo,Tue: 8:30-18:00
>>>> We,Thu: 8:30-16:00
>>>> Fr:  8:30-15:30
>>>> 
>>>> 
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>> 
>> 
> 
> 
> -- 
> Dr.-Ing. Jan Wienold
> Head of Team Passive Systems and Daylighting
> Fraunhofer-Institut für Solare Energiesysteme
> Thermal Systems and Buildings
> Heidenhofstr. 2, 79110 Freiburg, Germany
> Phone: +49(0)761 4588 5133 Fax:+49(0)761 4588 9133
> jan.wienold at ise.fraunhofer.de
> http://www.ise.fraunhofer.de
> 
> In office:
> Mo,Tue: 8:30-18:00
> We,Thu: 8:30-16:00
> Fr:  8:30-15:30
> 
> 
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