github.com/archlabjp/eeslism-go@v0.0.0-20231109122333-4bb7bfcdf292/eeslism/RAND.go (about) 1 //This file is part of EESLISM. 2 // 3 //Foobar is free software : you can redistribute itand /or modify 4 //it under the terms of the GNU General Public License as published by 5 //the Free Software Foundation, either version 3 of the License, or 6 //(at your option) any later version. 7 // 8 //Foobar is distributed in the hope that it will be useful, 9 //but WITHOUT ANY WARRANTY; without even the implied warranty of 10 //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the 11 //GNU General Public License for more details. 12 // 13 //You should have received a copy of the GNU General Public License 14 //along with Foobar.If not, see < https://www.gnu.org/licenses/>. 15 16 /* 17 18 乱数の発生 19 FILE=RAND.c 20 Create Date=1999.6.7 21 22 */ 23 24 package eeslism 25 26 import ( 27 "math" 28 "math/rand" 29 ) 30 31 func RAND(a, v *float64) { 32 const RAND_MAX = 2147483647 33 *a = 2.0 * math.Pi * (float64(rand.Intn(RAND_MAX)) / float64(RAND_MAX)) 34 *v = math.Acos(math.Sqrt(1.0 - (float64(rand.Intn(RAND_MAX)) / float64(RAND_MAX)))) 35 }