1 files changed, 1 insertions, 0 deletions
diff --git a/js/util.js b/js/util.js
index 2426973..6d297a1 100644
--- a/js/util.js
+++ b/js/util.js
@@ -52,6 +52,7 @@ function deg(n){ return n*180/PI }
 function rad(n){ return n*PI/180 }
 function xor(a,b){ a=!!a; b=!!b; return (a||b) && !(a&&b) }
 function mod(n,m){ return n-(m * floor(n/m)) }
+function modi(n,m){ return floor(n-(m * floor(n/m))) }
 function dist(x0,y0,x1,y1){ return sqrt(pow(x1-x0,2)+pow(y1-y0,2)) }
 function angle(x0,y0,x1,y1){ return atan2(y1-y0,x1-x0) }
 function avg(m,n,a){ return (m*(a-1)+n)/a }