From ed6427450e8fda43dfdd302f74eece60ab011e4f Mon Sep 17 00:00:00 2001
From: nafahmed <nahmed@ucvts.tec.nj.us>
Date: Mon, 9 Nov 2015 13:14:34 -0500
Subject: [PATCH 1/5] created one gravity bouncing ball

---
 GravityBallCode/GravityBallCode.pde | 25 +++++++++++--------------
 1 file changed, 11 insertions(+), 14 deletions(-)

diff --git a/GravityBallCode/GravityBallCode.pde b/GravityBallCode/GravityBallCode.pde
index df2493b..a7c7337 100644
--- a/GravityBallCode/GravityBallCode.pde
+++ b/GravityBallCode/GravityBallCode.pde
@@ -1,5 +1,5 @@
 //declare variables
-float x, y, velX, velY, diam;
+float x, y, velX, velY, diam, a;
 
 void setup() {
   //set size of canvas
@@ -7,32 +7,29 @@ void setup() {
 
   //initialize variables
   x = width/2;
-  y = height/2;
+  y = 0;
   diam = 80;
-  velX = random(-5, 5);
-  velY = random(-5, 5);
+a=1;
+ 
 }
 
 void draw() {
   //draw background to cover previous frame
   background(0);
 
+ velY = a+velY;
+
   //draw ball
   ellipse(x, y, diam, diam);
 
   //add velocity to position
-  x += velX;
+
   y += velY;
 
   //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) {
+ 
+  if (y  >= height) {
+    y=height;
     velY = -abs(velY);
-  } else if (y - diam/2 <= 0) {
-    velY = abs(velY);
-  }
+  } 
 }
\ No newline at end of file

From c57f302cc98257d8180ce0ceb9e10a7d46865150 Mon Sep 17 00:00:00 2001
From: nafahmed <nahmed@ucvts.tec.nj.us>
Date: Mon, 9 Nov 2015 13:24:36 -0500
Subject: [PATCH 2/5] add if loop, started arrays

---
 GravityBallCode/GravityBallCode.pde | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/GravityBallCode/GravityBallCode.pde b/GravityBallCode/GravityBallCode.pde
index a7c7337..403ad60 100644
--- a/GravityBallCode/GravityBallCode.pde
+++ b/GravityBallCode/GravityBallCode.pde
@@ -1,15 +1,20 @@
 //declare variables
-float x, y, velX, velY, diam, a;
+float []x= new float [30];
+float []y= new float [30];
+float []velX= new float [30];
+float []velY= new float [30];
+float []diam= new float [30];
+float []a= new float [30];
 
 void setup() {
   //set size of canvas
   size(800, 600);
 
   //initialize variables
-  x = width/2;
-  y = 0;
-  diam = 80;
-a=1;
+int i=0;
+for(i=0; i<30; i++){
+  
+}
  
 }
 
@@ -20,7 +25,7 @@ void draw() {
  velY = a+velY;
 
   //draw ball
-  ellipse(x, y, diam, diam);
+  ellipse(x[30], y[30], diam[30], diam[30]);
 
   //add velocity to position
 

From d109eeb6bc76cbdae4ed90aac58eb41cf5f15f93 Mon Sep 17 00:00:00 2001
From: nafahmed <nahmed@ucvts.tec.nj.us>
Date: Tue, 10 Nov 2015 12:39:44 -0500
Subject: [PATCH 3/5] finished arrays, added while statements

---
 GravityBallCode/GravityBallCode.pde | 56 ++++++++++++++++-------------
 1 file changed, 31 insertions(+), 25 deletions(-)

diff --git a/GravityBallCode/GravityBallCode.pde b/GravityBallCode/GravityBallCode.pde
index 403ad60..9804ba1 100644
--- a/GravityBallCode/GravityBallCode.pde
+++ b/GravityBallCode/GravityBallCode.pde
@@ -1,10 +1,10 @@
 //declare variables
-float []x= new float [30];
-float []y= new float [30];
-float []velX= new float [30];
-float []velY= new float [30];
-float []diam= new float [30];
-float []a= new float [30];
+int count = 30;
+float [] x= new float [count];
+float [] y= new float [count];
+float [] velY= new float [count];
+float [] diam= new float [count];
+float [] a= new float [count];
 
 void setup() {
   //set size of canvas
@@ -12,29 +12,35 @@ void setup() {
 
   //initialize variables
 int i=0;
-for(i=0; i<30; i++){
-  
-}
+
+  while(i<count){
+    y[i]=height/2;
+    x[i]= random(0,width);
+    diam[i]= random(20,40);
+    velY[i]= random(5,10);
+    a[i]= random(0.5, 5);
+    
+    i++;
+  }
+
  
 }
 
 void draw() {
-  //draw background to cover previous frame
-  background(0);
-
- velY = a+velY;
-
-  //draw ball
-  ellipse(x[30], y[30], diam[30], diam[30]);
-
-  //add velocity to position
+ background(0);
+ int i=0;
+ while(i<count){
+  ellipse(x[i], y[i], diam[i], diam[i]);
+  
+ 
 
-  y += velY;
+velY[i] = velY[i] + a[i];
+y[i] += velY[i];
 
-  //bounce ball if it hits walls
- 
-  if (y  >= height) {
-    y=height;
-    velY = -abs(velY);
-  } 
+if(y[i]>=height){
+ velY[i]=-abs(velY[i]); 
+y[i]=height;
+}
+i++;
+}
 }
\ No newline at end of file

From 4a47172e39ac3c1fc951156857c561beb49b0464 Mon Sep 17 00:00:00 2001
From: nafahmed <nahmed@ucvts.tec.nj.us>
Date: Tue, 10 Nov 2015 13:04:27 -0500
Subject: [PATCH 4/5] balls increase diameter when mouse touches them

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

diff --git a/GravityBallCode/GravityBallCode.pde b/GravityBallCode/GravityBallCode.pde
index 9804ba1..1078cce 100644
--- a/GravityBallCode/GravityBallCode.pde
+++ b/GravityBallCode/GravityBallCode.pde
@@ -32,7 +32,9 @@ void draw() {
  while(i<count){
   ellipse(x[i], y[i], diam[i], diam[i]);
   
- 
+ if(dist(x[i], y[i], mouseX, mouseY) < diam[i]/2){
+  diam[i]= diam[i]+5; 
+ }
 
 velY[i] = velY[i] + a[i];
 y[i] += velY[i];

From 1b56aa7775e5319b3aa797a77b6d095728044afc Mon Sep 17 00:00:00 2001
From: nafahmed <nahmed@ucvts.tec.nj.us>
Date: Tue, 10 Nov 2015 13:10:43 -0500
Subject: [PATCH 5/5] annotated code

---
 GravityBallCode/GravityBallCode.pde | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/GravityBallCode/GravityBallCode.pde b/GravityBallCode/GravityBallCode.pde
index 1078cce..fb9ef0d 100644
--- a/GravityBallCode/GravityBallCode.pde
+++ b/GravityBallCode/GravityBallCode.pde
@@ -8,40 +8,42 @@ float [] a= new float [count];
 
 void setup() {
   //set size of canvas
-  size(800, 600);
+  size(800, 600);   //set size
 
   //initialize variables
-int i=0;
+int i=0; //set local variable
 
   while(i<count){
     y[i]=height/2;
     x[i]= random(0,width);
-    diam[i]= random(20,40);
+    diam[i]= random(20,40);  //while i is less than 30, all these variables are true
     velY[i]= random(5,10);
     a[i]= random(0.5, 5);
     
-    i++;
+    i++;  //i increases by 1
   }
 
  
 }
 
 void draw() {
- background(0);
- int i=0;
+ background(0);  //set background
+ int i=0;  //set local variable
+ 
+ //while i is less than 30, all this is true
  while(i<count){
   ellipse(x[i], y[i], diam[i], diam[i]);
   
- if(dist(x[i], y[i], mouseX, mouseY) < diam[i]/2){
-  diam[i]= diam[i]+5; 
+ if(dist(x[i], y[i], mouseX, mouseY) < diam[i]/2){   //if distance between mouse and center is less than the radius of the circle...
+  diam[i]= diam[i]+5;                                //... increase the circle size
  }
 
-velY[i] = velY[i] + a[i];
-y[i] += velY[i];
+velY[i] = velY[i] + a[i];  //"gravity" acts on balls- decrease distance it bounces each time
+y[i] += velY[i];         
 
 if(y[i]>=height){
  velY[i]=-abs(velY[i]); 
-y[i]=height;
+y[i]=height;                  //change y direction when it hits the bottom
 }
 i++;
 }