[Radiance-general] rtrace

[Jia Hu]

Thanks for reminding. As Parellel process does not work if only one point is
considered?

On Wed, Jul 14, 2010 at 1:38 PM, Lars O. Grobe <grobe at gmx.net> wrote:

> Hi!
>
>
> For the same scene with different sky conditions (diffuse and direct
>> irradation), if I calculate illuminance at only one point under each
>> sky condition, the ambient file seems not to be necessary for
>> parellel processing because the caching values are different for each
>> processor under different sky condition, It is no need to share the
>> ambient caching, is that right? By the way, should I just specify a
>> name of ambient file at the beginning ? The program will create the
>> ambient with the specified name automatically ?
>>
>
> The amb-file will be created, but you must make sure to delete it if you
> change the scene or the settings used by rtrace so that the ambient
> calculation is started from scratch with valid data reflecting those
> changes.
>
> If you calculate only one illuminance value per sky condition, the ambient
> file does not help at all. However according to what you wrote earlier I
> would rethink the idea to take only one reading. You mentioned having
> blinds. If the sensor is hit by the sun, it will give readings several
> magnitudes higher then a sensor just some centimeters aside, as blinds would
> typically cast very distinct shadows. You would not find this in you single
> reading. To detect such cases, it may be useful to have a grid of sensors
> instead and, beside the illuminance, monitor also the deviation of all the
> sensors at the same sky condition as an indicator of how representive you
> sensor reading is.
>
> Cheers, Lars.
>
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://radiance-online.org/pipermail/radiance-general/attachments/20100714/a2a14ef5/attachment.html