From bda5421da267a18ee8bf80d54f4daf12c56c1a8d Mon Sep 17 00:00:00 2001
From: Mark Slee <mcslee@Mark-Slees-MacBook-Pro.local>
Date: Fri, 28 Jun 2013 12:01:04 -0700
Subject: [PATCH] Add mouse scroll to zoom

---
 _Internals.pde | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/_Internals.pde b/_Internals.pde
index 7936724..3bf4d31 100644
--- a/_Internals.pde
+++ b/_Internals.pde
@@ -55,8 +55,7 @@ boolean pandaBoardsEnabled = false;
 boolean debugMode = false;
 
 // Camera variables
-final float eyeR = -270;
-float eyeA, eyeX, eyeY, eyeZ, midX, midY, midZ;
+float eyeR, eyeA, eyeX, eyeY, eyeZ, midX, midY, midZ;
 
 void setup() {
   startMillis = lastMillis = millis();
@@ -107,10 +106,16 @@ void setup() {
   midX = glucose.model.xMax/2 + 20;
   midY = glucose.model.yMax/2;
   midZ = glucose.model.zMax/2;
+  eyeR = -270;
   eyeA = .15;
   eyeY = midY + 20;
   eyeX = midX + eyeR*sin(eyeA);
   eyeZ = midZ + eyeR*cos(eyeA);
+  addMouseWheelListener(new java.awt.event.MouseWheelListener() { 
+    public void mouseWheelMoved(java.awt.event.MouseWheelEvent mwe) { 
+      mouseWheel(mwe.getWheelRotation());
+  }}); 
+  
   
   println("Total setup: " + (millis() - startMillis) + "ms");
   println("Hit the 'p' key to toggle Panda Board output");
@@ -270,4 +275,10 @@ void mouseReleased() {
     ui.mouseReleased();
   }
 }
+ 
+void mouseWheel(int delta) {
+  eyeR = constrain(eyeR - delta, -500, -80);
+  eyeX = midX + eyeR*sin(eyeA);
+  eyeZ = midZ + eyeR*cos(eyeA);
+}
 
-- 
2.34.1