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.\" RCSid "$Id" |
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.\" RCSid "$Id$" |
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.TH GENSKY 1 4/24/98 RADIANCE |
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.SH NAME |
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gensky - generate a RADIANCE description of the sky |
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skyfunc glow skyglow |
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0 |
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0 |
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4 .9 .9 1 0 |
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4 .99 .99 1.1 0 |
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skyglow source sky |
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0 |
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description to use with the |
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.I \-av |
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option of the RADIANCE rendering programs. |
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(See rview(1) and rpict(1).) |
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(See rvu(1) and rpict(1).) |
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This value is the cosine-weighted radiance of the sky in |
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watts/steradian/meter2. |
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.PP |
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(Use negative angle for east.) |
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This is used in the calculation of solar time. |
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Be sure to give the correct longitude also! |
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If solar time is given directly, then this option has no effect. |
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If a time zone or solar time is given directly, then this option has no effect. |
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.SH EXAMPLE |
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To produce a sunny sky for July 4th at 2:30pm Eastern daylight time at a |
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site latitude of 42 degrees, 89 degrees west longitude: |
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.SH AUTHOR |
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Greg Ward |
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.SH "SEE ALSO" |
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rpict(1), rview(1), xform(1) |
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rpict(1), rvu(1), xform(1) |
