[Radiance-general] gensky

[Jia Hu]

Thank you very much, Rob.

Do you mean I should download the latest version to use that? My OP is
Ubuntu and I am not sure whether the latest one is compatible with this OP.

Jia


On Fri, Mar 26, 2010 at 12:46 AM, Rob Guglielmetti <rpg at rumblestrip.org>wrote:

> Hi Jia,
>
> On Mar 25, 2010, at 7:20 PM, Jia Hu wrote:
> > I have some questions relating to gensky command.
> >
> > (1) The book of "Rendering with radiance" says luminous efficacy is set
> to 179 for all CIE sky models. Is that true for current version?
>
> The 179 lm/watt is the standard luminous efficacy conversion for Radiance,
> and yes it's still the same for the current version.
>
> > (2) If I know Solar direct radiation and diffuse radiation, I hope to use
> Perez's (source: Modeling daylight availability and irradiance components
> from direct and global irradiance, 1990 solar energy) models (that is,
> interpolate two CIE sky model according to radiation), is that possible to
> generate a new sky luminance distribution model by interpolation of two
> standard CIE model in Radiance in order to calculate the interior
> illuminance more accurately?
>
> If you know direct and diffuse radiation, you can use gendaylit (recently
> added to the default Radiance distro) to generate a Perez sky model
> directly. Check the manpage for gendaylit. I have been using it lately for
> some studies based on TMY weather file info and it works well!
>
> - Rob
> _______________________________________________
> 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/20100326/4e3114bf/attachment.htm