diff options
Diffstat (limited to 'npc/functions')
| -rw-r--r-- | npc/functions/math.txt | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/npc/functions/math.txt b/npc/functions/math.txt index 004125c7b..a7be729a3 100644 --- a/npc/functions/math.txt +++ b/npc/functions/math.txt @@ -38,3 +38,31 @@ function script lognbaselvl { 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; + + freeloop(true); + while (!.@ok) { + // exact match + if (2**.@i == .@v) { + .@ok=1; + // inexact match, or limit exceeded + } if (2**.@i >= .@v || .@i > 20) { + .@ok=1; + .@i-=1; // round down + // not yet + } else { + .@i+=1; + } + } + freeloop(false); + + return .@i; +} + |