Last change
on this file since 2788 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:
469 bytes
|
Line | |
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1 | void Update_SUN() |
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2 | { |
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3 | KPP_REAL SunRise, SunSet; |
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4 | KPP_REAL Thour, Tlocal, Ttmp; |
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5 | const KPP_REAL PI = 3.14159265358979; |
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6 | |
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7 | SunRise = 4.5; |
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8 | SunSet = 19.5; |
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9 | Thour = TIME/3600.0; |
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10 | Tlocal = Thour - ((int)Thour/24)*24; |
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11 | |
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12 | if ( (Tlocal >= SunRise) && (Tlocal <= SunSet) ) { |
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13 | Ttmp = (2.0*Tlocal-SunRise-SunSet)/(SunSet-SunRise); |
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14 | if (Ttmp > 0) Ttmp = Ttmp*Ttmp; |
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15 | else Ttmp = -Ttmp*Ttmp; |
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16 | SUN = ( 1.0 + cos(PI*Ttmp) )/2.0; |
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17 | } else { |
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18 | SUN=0.0; |
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19 | } |
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20 | } |
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