Wed, 26 Sep 2018 11:45:10 +0200
Improved hop selection dropdown
11 | 1 | <?php |
2 | ||
3 | ||
4 | function ebc_to_srm($ebc) | |
5 | { | |
6 | // Srm = -1.32303E-12*Ebc4-0.00000000291515*Ebc3+0.00000818515*Ebc2+0.372038*Ebc+0.596351 | |
7 | return -1.32303E-12 * pow($ebc, 4) - 0.00000000291515 * pow($ebc, 3) + 0.00000818515 * pow($ebc, 2) + 0.372038 * $ebc + 0.596351; | |
8 | // return $ebc * 0.508; | |
9 | } | |
10 | ||
11 | ||
12 | function srm_to_ebc($srm) | |
13 | { | |
14 | // EBC = 0.000000000176506*Srm4+ 0.000000154529*Srm3-0.000159428*Srm2+2.68837*Srm-1.6004 | |
15 | // | |
16 | // Formule van Adrie Otten. brouwhulp. | |
17 | $ebc = 0.000000000176506 * pow($srm, 4) + 0.000000154529 * pow($srm, 3) - 0.000159428 * pow($srm, 2) + 2.68837 * $srm - 1.6004; | |
18 | return round($ebc); | |
19 | } | |
20 | ||
21 | ||
22 | ?> |