other math funcs :-p

1 files changed, 14 insertions, 1 deletions

diff --git a/js/util.js b/js/util.js
index 0dffc74..ac0f517 100644
--- a/js/util.js
+++ b/js/util.js
@@ -11,21 +11,34 @@ function mix(n,a,b){ return a*(1-n)+b*n }
 function ceil(n){ return Math.ceil(n) }
 function floor(n){ return Math.floor(n) }
 function round(n){ return Math.round(n) }
+function abs(n){ return Math.abs(n) }
+function sign(n){ return Math.abs(n)/n }
+function pow(n,b) { return Math.pow(n,b) }
+function exp(n) { return Math.exp(n) }
+function sqrt(n) { return Math.sqrt(n,b) }
 function sin(n){ return Math.sin(n) }
 function cos(n){ return Math.cos(n) }
 function tan(n){ return Math.tan(n) }
+function asin(n){ return Math.sin(n) }
+function acos(n){ return Math.cos(n) }
 function atan(n){ return Math.atan(n) }
+function atan2(n){ return Math.atan2(n) }
+function random(){ return Math.random() }
 function rand(n){ return (Math.random()*n) }
 function randint(n){ return rand(n)|0 }
 function choice(a){ return a[randint(a.length)] }
 function deg(n){ return n*180/PI }
 function rad(n){ return n*PI/180 }
+
+function step (n,a,b) {
+  return clamp((n - a) / (b - a), 0.0, 1.0);
+}
+// hermite curve apparently
 function smoothstep(n,a,b){
   var t = clamp((n - a) / (b - a), 0.0, 1.0);
   return t * t * (3.0 - 2.0 * t)
 }
 
-
 function loadImage(imageURL, callback) {
   var imageURL = proxify( imageURL );