From d3725243ea9157e411c5e913ccc28f27c9c2dd8b Mon Sep 17 00:00:00 2001
From: Joe Innes <joe@joeinn.es>
Date: Fri, 21 Apr 2017 16:56:38 +0200
Subject: [PATCH] Only propagate signals beyond a threshold

Only propagate signals beyond a threshold, and don't allow input to take a node above or below threshold
---
 v1.1/js/Node.js | 33 ++++++++++++++++++++++++++-------
 1 file changed, 26 insertions(+), 7 deletions(-)

diff --git a/v1.1/js/Node.js b/v1.1/js/Node.js
index c76bb04..5b29acb 100644
--- a/v1.1/js/Node.js
+++ b/v1.1/js/Node.js
@@ -82,6 +82,13 @@ function Node(model, config){
 			// Change my value
 			var delta = _controlsDirection*0.33; // HACK: hard-coded 0.33
 			self.value += delta;
+			
+			// Don't allow the node to pass threshold
+			if (self.value > 1) {
+				self.value = 1;
+			} else if (self.value < 0) {
+				self.value = 0;
+			}
 
 			// And also PROPAGATE THE DELTA
 			self.sendSignal({
@@ -112,14 +119,26 @@ function Node(model, config){
 			myEdges[i].addSignal(signal);
 		}
 	};
-
+	
 	self.takeSignal = function(signal){
-
-		// Change value
-		self.value += signal.delta;
-
-		// Propagate signal
-		self.sendSignal(signal);
+		
+		// Only propagate beyond threshold
+		if (signal.delta < 0) {
+			if (self.value < 0.1) {
+				self.sendSignal(signal);
+			} else {
+				self.value += signal.delta;	
+			}
+		} else if (signal.delta > 0) {
+			if (self.value > 0.9) {
+				self.sendSignal(signal);
+			} else {
+				self.value += signal.delta;	
+			}
+		} else {
+			self.value += signal.delta;
+		}
+		
 		// self.sendSignal(signal.delta*0.9); // PROPAGATE SLIGHTLY WEAKER
 
 		// Animation