Master

BouncingWithVectors/BouncingWithVectors.pde

@@ -1,37 +1,50 @@
 //declare variables
-float x, y, velX, velY, diam;
+float diam;
+int count = 30;
+//float loc.x,loc.y
+PVector [] loc= new PVector [count]; //replaces loc.x and loc.y
+
+//float vel.loc.x, vel.loc.y
+PVector [] vel= new PVector [count]; //replces vel.loc.x and vel.loc.y
+
 
 void setup() {
   //set size of canvas
   size(800, 600);
-
+  for (int i = 0; i < count; i++) {
   //initialize variables
-  x = width/2;
-  y = height/2;
+  // loc.x = width/2;
+  //loc.y = height/2;
+  loc[i]= new PVector(width/2, height/2);
   diam = 80;
-  velX = random(-5, 5);
-  velY = random(-5, 5);
+  //vel.loc.x = random(-5, 5);
+  //vel.loc.y = random(-5, 5);
+  vel[i] = PVector.random2D();
+}
 }
 
 void draw() {
   //draw background to cover previous frame
   background(0);
-
+  for (int i = 0; i < count; i++) {
   //draw ball
-  ellipse(x, y, diam, diam);
+  ellipse(loc[i].x, loc[i].y, diam, diam);
 
   //add velocity to position
-  x += velX;
-  y += velY;
+  //loc.x += vel.x;
+  //loc.y += vel.y;
+  loc[i].add(vel[i]);
 
   //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 (loc[i].x + diam/2 >= width) {
+    vel[i].x = -abs(vel[i].x);    //if the ball hits the right wall, assign loc.x velocitloc.y the negative version of itself
+  } else if (loc[i].x - diam/2 <= 0) {
+    vel[i].x = abs(vel[i].x);     //if the ball hits the left wall, assign loc.x velocitloc.y the positive version of itself
   }
-  if (y + diam/2 >= height) {
-    velY = -abs(velY);
-  } else if (y - diam/2 <= 0) {
-    velY = abs(velY);
+  if (loc[i].y + diam/2 >= height) {
+    vel[i].y = -abs(vel[i].y);
+  } else if (loc[i].y - diam/2 <= 0) {
+    vel[i].y = abs(vel[i].y);
   }
+}
+}

Wanderer/Wanderer.pde

@@ -1,37 +1,48 @@
 //declare variables
-float x, y, velX, velY, diam;
+float diam;  //float loc. x,y
+PVector loc, acc, vel; //replaces loc.x and loc.y
 
 void setup() {
   //set size of canvas
   size(800, 600);
 
   //initialize variables
-  x = width/2;
-  y = height/2;
+  loc = new PVector(width/2, height/2);
+
+
+  //x = width/2;
+  // y = height/2;
   diam = 80;
-  velX = random(-5, 5);
-  velY = random(-5, 5);
+  //velX = random(-5, 5);
+  //velY = random(-5, 5);
+  vel = new PVector(4, 7);
+  vel.mult(1);
+  acc = PVector.random2D();
+  acc.mult(.1);
 }
 
 void draw() {
   //draw background to cover previous frame
-  background(0);
+  background(0, 135, 220);
 
   //draw ball
-  ellipse(x, y, diam, diam);
-
+  fill(0);
+  ellipse(loc.x, loc.y, diam, diam);
+  vel.add(acc);
+  vel.limit(2);
   //add velocity to position
-  x += velX;
-  y += velY;
+  //loc.x += vel.x;
+  //loc.y += vel.y;
+  loc.add(vel);
 
-  //wrap the ball's position
-  if (x + diam/2 >= width) {
-    x = -diam/2;     
-  } else if (x - diam/2 <= 0) {
-    x = width + diam/2;
+  if (loc.x >= width) {  //allows ball to wander in the x direction
+    loc.x = 0;
+  } else if (loc.x <= 0) {  //allows ball to wander in the x direction
+    loc.x = width;
   }
-  if (y + diam/2 >= height) {
-    y = -diam/2;
-  } else if (y - diam/2 <= 0) {
-    y = height + diam/2;
+  if (loc.y >=height) {  //allows ball to wander in the y direction
+    loc.y = 0;
+  } else if (loc.y <= 0) {  //allows ball to wander in the y direction
+    loc.y = height;
   }
+}