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// 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;
}
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