Stephen wrote:

> I have been working on enhancements to the SunPos() macro to calculate the
> time of SunRise and SunSet for a location on earth.  For those who haven't
> used it, SunPos() defines a position for the sun based on the day of the
> year, time, and location. I have used this macro to animate the sunshine on
> my house, and realized that there's no point in animating any frames prior
> to sunrise or after sunset, at least in my application. This time period
> varies depending upon the day of the year, so I wanted an automated method
> to limit the time window.
> 
> I have implemented another macro SunRiSet() which can be used in conjunction
> with SunPos(), or not, for that matter, and can be used to define the start
> and finish times of the animation on any calendar day.  It also allows you
> to schedule the sun due South, which will be noonish in your local time
> zone, but varies a bit depending upon where you are across your local zone.
> 
> I'll make this include file available to whomever wants it, along with an
> enhanced SunPos() and sample code.
> 
> The following image is based on a satellite orbiting the earth directly
> between the sun and the earth so it casts a shadow in line with the sun.  In
> using a reflective sphere, I noticed this eerie "eye" effect, which I post
> here for your comments.
> 
> 
> direct email is pennyhedron at shaw dot ca

Creepy!!! :-)
Welcome to the group!

-- 
Respectfully,
Dan P
http://<broken link>

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