diff options
author | Perry Hung <iperry@alum.mit.edu> | 2010-04-25 18:14:43 -0400 |
---|---|---|
committer | Perry Hung <iperry@alum.mit.edu> | 2010-04-25 18:14:43 -0400 |
commit | 4ccbeb08e64b6bc7cee1f54a04001eff778b4282 (patch) | |
tree | 05f71e01c98ac341c029b2a050b796f1be3de8b5 /wirish/wirish_math.cpp | |
parent | b41eb846ca60559cff242d0c550699eb8f309909 (diff) | |
parent | 62552a6f3f93223682f9df2df2614411f7e3d54c (diff) | |
download | librambutan-4ccbeb08e64b6bc7cee1f54a04001eff778b4282.tar.gz librambutan-4ccbeb08e64b6bc7cee1f54a04001eff778b4282.zip |
Merge branch 'master' into spi
Diffstat (limited to 'wirish/wirish_math.cpp')
-rw-r--r-- | wirish/wirish_math.cpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/wirish/wirish_math.cpp b/wirish/wirish_math.cpp new file mode 100644 index 0000000..0d907c4 --- /dev/null +++ b/wirish/wirish_math.cpp @@ -0,0 +1,54 @@ +/* + Modified by LeafLabs, LLC. + + Part of the Wiring project - http://wiring.org.co + Copyright (c) 2004-06 Hernando Barragan + Modified 13 August 2006, David A. Mellis for Arduino - http://www.arduino.cc/ + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General + Public License along with this library; if not, write to the + Free Software Foundation, Inc., 59 Temple Place, Suite 330, + Boston, MA 02111-1307 USA + + $Id$ +*/ + +#include <stdlib.h> +#include "math.h" + +void randomSeed(unsigned int seed) { + if (seed != 0) { + srand(seed); + } +} + +long random(long howbig) { + if (howbig == 0) { + return 0; + } + return rand() % howbig; +} + +long random(long howsmall, long howbig) { + if (howsmall >= howbig) { + return howsmall; + } + long diff = howbig - howsmall; + return random(diff) + howsmall; +} + +long map(long x, long in_min, long in_max, long out_min, long out_max) { + return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; +} + + |