comparison: sanguino/cores/arduino/WMath.cpp
sanguino/cores/arduino/WMath.cpp
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- b373b0288715
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| 1 /* -*- mode: jde; c-basic-offset: 2; indent-tabs-mode: nil -*- */ | |
| 2 | |
| 3 /* | |
| 4 Part of the Wiring project - http://wiring.org.co | |
| 5 Copyright (c) 2004-06 Hernando Barragan | |
| 6 Modified 13 August 2006, David A. Mellis for Arduino - http://www.arduino.cc/ | |
| 7 | |
| 8 This library is free software; you can redistribute it and/or | |
| 9 modify it under the terms of the GNU Lesser General Public | |
| 10 License as published by the Free Software Foundation; either | |
| 11 version 2.1 of the License, or (at your option) any later version. | |
| 12 | |
| 13 This library is distributed in the hope that it will be useful, | |
| 14 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 Lesser General Public License for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU Lesser General | |
| 19 Public License along with this library; if not, write to the | |
| 20 Free Software Foundation, Inc., 59 Temple Place, Suite 330, | |
| 21 Boston, MA 02111-1307 USA | |
| 22 | |
| 23 $Id$ | |
| 24 */ | |
| 25 | |
| 26 extern "C" { | |
| 27 #include "stdlib.h" | |
| 28 } | |
| 29 | |
| 30 void randomSeed(unsigned int seed) | |
| 31 { | |
| 32 if (seed != 0) { | |
| 33 srandom(seed); | |
| 34 } | |
| 35 } | |
| 36 | |
| 37 long random(long howbig) | |
| 38 { | |
| 39 if (howbig == 0) { | |
| 40 return 0; | |
| 41 } | |
| 42 return random() % howbig; | |
| 43 } | |
| 44 | |
| 45 long random(long howsmall, long howbig) | |
| 46 { | |
| 47 if (howsmall >= howbig) { | |
| 48 return howsmall; | |
| 49 } | |
| 50 long diff = howbig - howsmall; | |
| 51 return random(diff) + howsmall; | |
| 52 } | |
| 53 | |
| 54 long map(long x, long in_min, long in_max, long out_min, long out_max) | |
| 55 { | |
| 56 return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; | |
| 57 } | |
| 58 | |
| 59 unsigned int makeWord(unsigned int w) { return w; } | |
| 60 unsigned int makeWord(unsigned char h, unsigned char l) { return (h << 8) | l; } |
