[Radiance-general] Solar Rays Tracing path

[David Smith]

I'd like to take a step backward here. There's a feature in Ecotect
that lets you cast parallel rays from the sun to surfaces in the
scene. It treats all of these surfaces as perfectly specularly
reflective surfaces, basically mirrors.

Here's a very quick and dirty animation:
http://img695.imageshack.us/i/ecotect.mp4/

If you ever wondered why so many people think light shelves are an
easy way to get light deep into a space, this may be part of the
reason. The way lightshelves affect a space is much more complicated
than that.

--Dave


> -----Original Message-----
> From: radiance-general-bounces at radiance-online.org [mailto:radiance-general-
> bounces at radiance-online.org] On Behalf Of Lars O. Grobe
> Sent: Thursday, November 05, 2009 9:30 AM
> To: Radiance general discussion
> Subject: Re: [Radiance-general] Solar Rays Tracing path
>
> Hi!
>
> > Someone did and included it in the distribution. I think it's called
> > xshowtrace.
>
> Good hint. However, I think that this use case would require to go from
> the source, not from the view point. I guess that one could get rtrace
> to get the intersection and direction vectors by taking the light source
> as first view point. But I am not aware of anyone who did that.
>
> Cheers, Lars.
>
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