From 9c3f4b8fa8708dafbdd16cb4d538bfaa8897a89a Mon Sep 17 00:00:00 2001
From: timb <opuscule@gmail.com>
Date: Wed, 5 Aug 2015 09:26:50 -0700
Subject: shader fps

---
 js/shader.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'js')

diff --git a/js/shader.js b/js/shader.js
index 81a1ec5..f0ed548 100644
--- a/js/shader.js
+++ b/js/shader.js
@@ -29,17 +29,27 @@ var shader = (function(){
   }
   exports.toggle = function(state){
     animating = typeof state == "boolean" ? state : ! animating
+    shader_fps_el.classList.toggle('hidden')
     return animating
   }
   exports.pause = function(){
     animating = false
+    shader_fps_el.classList.add('hidden')
+    shader.fps_time = 0
   }
   exports.play = function(){
     animating = true
+    shader_fps_el.classList.remove('hidden')
   }
   exports.animate = function (t){
     requestAnimationFrame(exports.animate)
     if (! animating) { return } 
+    if (shader.fps_time){
+      var ms = Date.now() - shader.fps_time
+      fps = 1000 / ms
+      shader_fps_el.innerHTML = (fps | 0) + ' fps'
+    }
+    shader.fps_time = Date.now()
     exports.run(canvas)
   }
   
-- 
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