From 282657a4beb7c78c4420c6b8268d8d929fe6a670 Mon Sep 17 00:00:00 2001
From: timb <opuscule@gmail.com>
Date: Tue, 14 Jan 2014 23:33:59 -0800
Subject: reorder smoothstep args, add julestep fn back

---
 instructions.html | 2 +-
 js/util.js        | 8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/instructions.html b/instructions.html
index fb522c0..dff99d8 100644
--- a/instructions.html
+++ b/instructions.html
@@ -30,7 +30,7 @@ E, PI, PHI
 clamp(n,min,max)
 mix(n,a,b) (lerp)
 step(a,b)
-smoothstep(n,a,b)
+smoothstep(min,max,n)
 avg(m,n,a)
 cosp, sinp (mapped to [0,1])
 pixel(x,y) == 4*(y*w+h)
diff --git a/js/util.js b/js/util.js
index 46943f9..7bb1c78 100644
--- a/js/util.js
+++ b/js/util.js
@@ -61,9 +61,13 @@ function step(a, b){
                // ^^ bool -> int
 }
 
+function julestep (a,b,n) {
+  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);
+function smoothstep(min,max,n){
+  var t = clamp((n - min) / (max - min), 0.0, 1.0);
   return t * t * (3.0 - 2.0 * t)
 }
 
-- 
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