From 8d117a08d25e041567aa86b2b72b77c0a01eca25 Mon Sep 17 00:00:00 2001
From: smakkar <smakkar@ucvts.tec.nj.us>
Date: Tue, 10 Nov 2015 14:09:20 -0500
Subject: [PATCH 1/3] Added Gravity

---
 GravityBallCode/GravityBallCode.pde | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/GravityBallCode/GravityBallCode.pde b/GravityBallCode/GravityBallCode.pde
index df2493b..a35b8e0 100644
--- a/GravityBallCode/GravityBallCode.pde
+++ b/GravityBallCode/GravityBallCode.pde
@@ -1,16 +1,17 @@
 //declare variables
 float x, y, velX, velY, diam;
+float g;
 
 void setup() {
   //set size of canvas
   size(800, 600);
 
   //initialize variables
+  g=0.1;
   x = width/2;
   y = height/2;
   diam = 80;
   velX = random(-5, 5);
-  velY = random(-5, 5);
 }
 
 void draw() {
@@ -23,6 +24,7 @@ void draw() {
   //add velocity to position
   x += velX;
   y += velY;
+  velY = velY+g;
 
   //bounce ball if it hits walls
   if (x + diam/2 >= width) {

From bd11d3e576acd1b9988f39a018e7282ea68472ad Mon Sep 17 00:00:00 2001
From: smakkar <smakkar@ucvts.tec.nj.us>
Date: Tue, 10 Nov 2015 14:45:20 -0500
Subject: [PATCH 2/3] 30 Balls with Gravity

---
 GravityBallCode/GravityBallCode.pde | 59 +++++++++++++++++------------
 1 file changed, 34 insertions(+), 25 deletions(-)

diff --git a/GravityBallCode/GravityBallCode.pde b/GravityBallCode/GravityBallCode.pde
index a35b8e0..cebebf0 100644
--- a/GravityBallCode/GravityBallCode.pde
+++ b/GravityBallCode/GravityBallCode.pde
@@ -1,40 +1,49 @@
 //declare variables
-float x, y, velX, velY, diam;
-float g;
+int count =30;
+float[] x = new float[count];
+float[] y = new float[count];
+float[] velX = new float[count];
+float[] velY = new float[count];
+float[] diam = new float[count];
+float[] g= new float[count];
+
 
 void setup() {
   //set size of canvas
   size(800, 600);
-
-  //initialize variables
-  g=0.1;
-  x = width/2;
-  y = height/2;
-  diam = 80;
-  velX = random(-5, 5);
+  for (int i =0; i < count; i++) {
+    //initialize variables
+    g[i] =0.1;
+    x[i]  = width/2;
+    y[i]  = height/2;
+    diam[i] = 80;
+    velX[i]  = random(-5, 5);
+  }
 }
 
 void draw() {
   //draw background to cover previous frame
   background(0);
+  for (int i = 0; i < count; i++) {
+    velY[i]  = velY[i] +g[i] ;
+    //draw ball
+    ellipse(x[i], y[i], diam[i], diam[i] );
 
-  //draw ball
-  ellipse(x, y, diam, diam);
+    //add velocity to position
+    x[i] += velX[i] ;
+    y[i] += velY[i] ;
 
-  //add velocity to position
-  x += velX;
-  y += velY;
-  velY = velY+g;
 
-  //bounce ball if it hits walls
-  if (x + diam/2 >= width) {
-    velX = -abs(velX);    //if the ball hits the right wall, assign x velocity the negative version of itself
-  } else if (x - diam/2 <= 0) {
-    velX = abs(velX);     //if the ball hits the left wall, assign x velocity the positive version of itself
-  }
-  if (y + diam/2 >= height) {
-    velY = -abs(velY);
-  } else if (y - diam/2 <= 0) {
-    velY = abs(velY);
+    //bounce ball if it hits walls
+    if (x[i]  + diam[i] /2 >= width) {
+      velX[i]  = -abs(velX[i] );    //if the ball hits the right wall, assign x velocity the negative version of itself
+    } else if (x[i]  - diam[i] /2 <= 0) {
+      velX[i]  = abs(velX[i] );     //if the ball hits the left wall, assign x velocity the positive version of itself
+    }
+    if (y[i]  + diam[i] /2 >= height) {
+      velY[i]  = -abs(velY[i] );
+    } else if (y[i]  - diam[i] /2 <= 0) {
+      velY[i]  = abs(velY[i] );
+    }
   }
 }
\ No newline at end of file

From 6b24627b67b1f59910a36248874bd671642dd873 Mon Sep 17 00:00:00 2001
From: smakkar <smakkar@ucvts.tec.nj.us>
Date: Wed, 11 Nov 2015 14:05:59 -0500
Subject: [PATCH 3/3] Fixed Code up a little

---
 GravityBallCode/GravityBallCode.pde | 1 +
 1 file changed, 1 insertion(+)

diff --git a/GravityBallCode/GravityBallCode.pde b/GravityBallCode/GravityBallCode.pde
index cebebf0..91bc085 100644
--- a/GravityBallCode/GravityBallCode.pde
+++ b/GravityBallCode/GravityBallCode.pde
@@ -42,6 +42,7 @@ void draw() {
     }
     if (y[i]  + diam[i] /2 >= height) {
       velY[i]  = -abs(velY[i] );
+      y[i] = height - diam[i]/2;
     } else if (y[i]  - diam[i] /2 <= 0) {
       velY[i]  = abs(velY[i] );
     }