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author | bnewbold <bnewbold@robocracy.org> | 2010-03-31 08:52:45 +0800 |
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committer | iperry <iperry@gmail.com> | 2010-03-31 09:43:10 +0800 |
commit | 1d3861ef93f8423176c6010ab606abdab00a7cbd (patch) | |
tree | 5c95101e295bcfdd7f9f4292ce9204ddf7e7f662 /core/wiring_math.cpp | |
parent | 8d6bf3b196c2a0bc1adda4a04669e54fdc5b65cb (diff) | |
download | librambutan-1d3861ef93f8423176c6010ab606abdab00a7cbd.tar.gz librambutan-1d3861ef93f8423176c6010ab606abdab00a7cbd.zip |
Major hierarchy reorganization; see README.
copy-to-ide and Makefile updated to conform; .gitignore added;
LICENSE added
Diffstat (limited to 'core/wiring_math.cpp')
-rw-r--r-- | core/wiring_math.cpp | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/core/wiring_math.cpp b/core/wiring_math.cpp new file mode 100644 index 0000000..9be7dc3 --- /dev/null +++ b/core/wiring_math.cpp @@ -0,0 +1,38 @@ +#include <stdlib.h> +#include "math.h" + +/* from newlib: + * + * rand returns the next pseudo-random integer in sequence; it is a number + * between 0 and RAND_MAX (inclusive). + * + * srand does not return a result. */ + + +/* The rest copied from WMath.cpp */ +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; +} + + |