Merge branch 'master' of lmno:dither

1 files changed, 7 insertions, 0 deletions

diff --git a/js/util.js b/js/util.js
index e9a0422..3a03f55 100644
--- a/js/util.js
+++ b/js/util.js
@@ -41,6 +41,13 @@ function choice(a){ return a[randint(a.length)] }
 function deg(n){ return n*180/PI }
 function rad(n){ return n*PI/180 }
 function pixel(x,y){ return 4*(y*w+x) }
+function rgbpixel(d,x,y){
+  var p = pixel(x,y)
+  r = d[p]
+  g = d[p+1]
+  b = d[p+2]
+  a = d[p+3]
+}
 function mod(n,m){ return 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) }