From 21fd283f11e9ae8e2a0e2ba487427ff9530c45f6 Mon Sep 17 00:00:00 2001
From: nli17 <nli@MH201-1212.ucvts.tec.nj.us>
Date: Tue, 10 Nov 2015 13:58:37 -0500
Subject: [PATCH 1/3] gravity

---
 GravityBallCode/GravityBallCode.pde | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/GravityBallCode/GravityBallCode.pde b/GravityBallCode/GravityBallCode.pde
index df2493b..6f7b879 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, gravity;
 
 void setup() {
   //set size of canvas
@@ -11,12 +11,16 @@ void setup() {
   diam = 80;
   velX = random(-5, 5);
   velY = random(-5, 5);
+  gravity= 1;
 }
 
 void draw() {
   //draw background to cover previous frame
   background(0);
 
+  //add gravity
+  velY += gravity;
+  
   //draw ball
   ellipse(x, y, diam, diam);
 
@@ -24,6 +28,9 @@ void draw() {
   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

From a76035ce594010fb09dd83babc3d646cd2baf075 Mon Sep 17 00:00:00 2001
From: nli17 <nli@MH201-1212.ucvts.tec.nj.us>
Date: Tue, 10 Nov 2015 14:19:48 -0500
Subject: [PATCH 2/3] creating arrays

---
 GravityBallCode/GravityBallCode.pde | 74 ++++++++++++++++-------------
 1 file changed, 41 insertions(+), 33 deletions(-)

diff --git a/GravityBallCode/GravityBallCode.pde b/GravityBallCode/GravityBallCode.pde
index 6f7b879..e196acc 100644
--- a/GravityBallCode/GravityBallCode.pde
+++ b/GravityBallCode/GravityBallCode.pde
@@ -1,45 +1,53 @@
 //declare variables
-float x, y, velX, velY, diam, gravity;
+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 gravity;
+
 
 void setup() {
   //set size of canvas
   size(800, 600);
-
-  //initialize variables
-  x = width/2;
-  y = height/2;
-  diam = 80;
-  velX = random(-5, 5);
-  velY = random(-5, 5);
-  gravity= 1;
+  for (int i = 0; i < count; i++) {
+    //initialize variables
+    x[i] = width/2;
+    y[i] = height/2;
+    diam[i] = 80;
+    velX[i] = random(-5, 5);
+    velY[i] = random(-5, 5);
+    gravity= 1;
+  }
 }
 
 void draw() {
   //draw background to cover previous frame
   background(0);
-
-  //add gravity
-  velY += gravity;
-  
-  //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) {
-    velY = -abs(velY);
-  } else if (y - diam/2 <= 0) {
-    velY = abs(velY);
+  for (int i=0; i<count; i++) {
+    //add gravity
+    velY[i]+= gravity;
+
+    //draw ball
+    ellipse(x[i], y[i], diam[i], diam[i]);
+    fill(random(100),random(100), random(100));
+    noStroke();
+
+    //add velocity to position
+    x[i] += velX[i];
+    y[i] += velY[i];
+
+    //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 8f7134ba5e0e29f3beae285cea0e0d713c61934d Mon Sep 17 00:00:00 2001
From: nli17 <nli@MH201-1212.ucvts.tec.nj.us>
Date: Wed, 11 Nov 2015 14:38:51 -0500
Subject: [PATCH 3/3] gravity

---
 GravityBallCode/GravityBallCode.pde | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/GravityBallCode/GravityBallCode.pde b/GravityBallCode/GravityBallCode.pde
index e196acc..57a5fc7 100644
--- a/GravityBallCode/GravityBallCode.pde
+++ b/GravityBallCode/GravityBallCode.pde
@@ -18,7 +18,7 @@ void setup() {
     diam[i] = 80;
     velX[i] = random(-5, 5);
     velY[i] = random(-5, 5);
-    gravity= 1;
+    gravity= .5;
   }
 }
 
@@ -31,7 +31,7 @@ void draw() {
 
     //draw ball
     ellipse(x[i], y[i], diam[i], diam[i]);
-    fill(random(100),random(100), random(100));
+    fill(random(100), random(100), random(100));
     noStroke();
 
     //add velocity to position
@@ -46,6 +46,7 @@ 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]);
     }