better chara input

1 files changed, 18 insertions, 2 deletions

diff --git a/js/shader.js b/js/shader.js
index b829a0d..cd6b899 100644
--- a/js/shader.js
+++ b/js/shader.js
@@ -1,13 +1,14 @@
 var shader = (function(){
 	var fn_str, fn, lex
 	var exports = {}
+	var animating = false
 	
 	exports.init = function(){
 		lex = new Lex (0, 0)
 		exports.build(demo_shader.innerHTML)
 	}
 	exports.build = function (fn_str){
-		new_fn = new Function('lex', 'x', 'y', fn_str)
+		new_fn = new Function('lex', 'x', 'y', 't', fn_str)
 		try {
 			new_fn(lex, 0, 0)
 		}
@@ -18,11 +19,26 @@ var shader = (function(){
 		return fn
 	}
 	exports.run = function(canvas){
+		var t = +new Date
 		canvas.forEach(function(lex, y, x){
-			fn(lex, x, y)
+			fn(lex, x, y, t)
 			lex.build()
 		})
 	}
+	exports.toggle = function(state){
+		animating = typeof state == "boolean" ? state : ! animating
+	}
+	exports.pause = function(){
+		animating = false
+	}
+	exports.play = function(){
+		animating = true
+	}
+	exports.animate = function (t){
+		requestAnimationFrame(exports.animate)
+		if (! animating) { return }
+		exports.run(canvas)
+	}
 	
 	return exports