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Diffstat (limited to 'npc/functions/math.txt')
-rw-r--r-- | npc/functions/math.txt | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/npc/functions/math.txt b/npc/functions/math.txt new file mode 100644 index 00000000..9c93fbb7 --- /dev/null +++ b/npc/functions/math.txt @@ -0,0 +1,123 @@ +// Evol functions. +// Authors: +// 4144 +// Reid +// Description: +// Math functions + + +// abs(<int>) +// returns the absolute value of the passed integer + +function script abs { + .@n = getarg(0); + return .@n >= 0 ? .@n : -.@n; +} + + + +// lognbaselvl({<multiplicator>{, <min value>}}) +// returns BaseLevel * logn (BaseLevel * alpha). + +function script lognbaselvl { + .@alpha = getarg(0, 1); + .@min = getarg(1, 1); + .@ret = 0; + .@pc_level = BaseLevel * .@alpha; + + while (.@pc_level >>= 1) + { + ++.@ret; + } + .@ret *= BaseLevel; + + if (.@ret <= .@min) + { + .@ret = .@min; + } + + return .@ret; +} + +// log2(<int>) +// returns the log base 2 of the passed integer, up to 20 (2**20=1.048.576) (round down always) + +function script log2 { + .@v=abs(getarg(0)); + .@ok=0; + .@i=0; + if (.@v < 1) + return -1; + + freeloop(true); + while (!.@ok) { + // exact match + if (2**.@i == .@v) { + .@ok=1; + // inexact match, or limit exceeded + } else if (2**.@i >= .@v || .@i > 20) { + .@ok=1; + .@i-=1; // round down + // not yet + } else { + .@i+=1; + } + } + freeloop(false); + + return .@i; +} + + +// result is: lower < target <= higher +// is_between ( lower, higher, target) +function script is_between { + .@val=getarg(2); + .@min=getarg(0); + .@max=getarg(1); + return (.@min < .@val && .@val <= .@max); +} + + +// forces the equation: lower <= target <= higher. +// Note it still works if higher and target values are swapped. +// limit ( lower, target, higher) +function script limit { + return max(getarg(0), min(getarg(1), getarg(2))); +} + + +// result is the ponderate average. +// ponderate_avg ( arg1, sub1, arg2, sub2) +function script ponderate_avg { + .@a1=getarg(0); + .@s1=getarg(1); + .@a2=getarg(2); + .@s2=getarg(3); + + .@h1=.@a1*.@s1; + .@h2=.@a2*.@s2; + .@dd=.@s1+.@s2; + + return (.@h1+.@h2)/.@dd; +} + +// bitmask_count(<int>) +// returns the number of bits set in <int> (max. 4096) + +function script bitmask_count { + .@n = getarg(0); // Number evaluated + .@p=0; // Bits set/unset + .@s=0; // Stack and Check + .@m=0; // Memory + + // Loop only as needed + while (.@s < .@n) { + .@s=2**.@m; + if (.@n & .@s) + .@p++; + .@m++; + } + return .@p; +} + |