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Last change
on this file since 4775 was
2696,
checked in by kanani, 7 years ago
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Merge of branch palm4u into trunk
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File size:
433 bytes
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| 1 | function Update_SUN( ) |
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| 2 | |
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| 3 | global TIME SUN |
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| 4 | |
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| 5 | SunRise = 4.5; |
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| 6 | SunSet = 19.5; |
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| 7 | Thour = TIME/3600.; |
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| 8 | Tlocal = Thour - floor(Thour/24)*24; |
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| 9 | |
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| 10 | if ( (Tlocal>=SunRise) & (Tlocal<=SunSet) ) |
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| 11 | Ttmp = (2.0*Tlocal-SunRise-SunSet)/(SunSet-SunRise); |
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| 12 | if (Ttmp>0) |
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| 13 | Ttmp = Ttmp*Ttmp; |
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| 14 | else |
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| 15 | Ttmp = -Ttmp*Ttmp; |
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| 16 | end |
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| 17 | SUN = ( 1.0 + cos(pi*Ttmp) )/2.0 ; |
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| 18 | else |
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| 19 | SUN = 0.0; |
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| 20 | end |
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| 21 | |
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| 22 | return % Update_SUN |
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| 23 | |
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