alice gao vectors master

BouncingWithVectors/BouncingWithVectors.pde

@@ -1,37 +1,49 @@
+int count = 80; //makes 60  balls
+
 //declare variables
-float x, y, velX, velY, diam;
+
+float [] diam = new float [count]; //diameter
+
+
+//float loc.x, loc.y  
+PVector [] loc = new PVector [count];
+PVector [] vel = new PVector [count];  // replaces x,y, vel[i]x, vel[i]y, 
+
 
 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);
+  for (int i = 0; i < count; i ++) { //for arrays
+    //initialize variables
+    loc [i] = new PVector (random(350,450), height/2); //starts ellipse off in a random position from 350-450, middle of screen 
+    vel[i] = PVector.random2D(); //gives speed magnitude of one
+    vel[i].mult(random(5,8)); //increased speed
+    diam [i] = random(3,88); //diameter
+  }
 }
 
 void draw() {
   //draw background to cover previous frame
   background(0);
+  for (int i = 0; i < count; i ++) { //for arrays
+    strokeWeight(3); // increased stroke weight 
+    stroke(random(206), random(235), random(245)); //gives random stroke
+    //draw ball
+    ellipse(loc[i].x, loc[i].y, diam[i], diam[i]);
 
-  //draw ball
-  ellipse(x, y, diam, diam);
+    //add vel[i]ocitloc.y to position
+    loc[i].add(vel[i]);
 
-  //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);
+    //bounce ball if it hits walls
+    if (loc[i].x + diam[i]/2 >= width) {
+      vel[i].x = -abs(vel[i].x);    //if the ball hits the right wall, assign loc.x vel[i]ocitloc.y the negative version of itself
+    } else if (loc[i].x - diam[i]/2 <= 0) {
+      vel[i].x = abs(vel[i].x);     //if the ball hits the left wall, assign loc.x vel[i]ocitloc.y the positive version of itself
+    }
+    if (loc[i].y + diam[i]/2 >= height) {
+      vel[i].y = -abs(vel[i].y);
+    } else if (loc[i].y - diam[i]/2 <= 0) {
+      vel[i].y = abs(vel[i].y);
+    }
   }
+}

Wanderer/Wanderer.pde

@@ -1,37 +1,53 @@
+int count = 8; 
+
 //declare variables
-float x, y, velX, velY, diam;
+PVector [] loc = new PVector [count]; 
+PVector [] vel = new PVector [count]; 
+PVector [] a = new PVector [count]; 
+float [] diam = new float [count];
 
 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);
+  for (int i = 0; i < count; i++) {
+    //initialize variables
+    loc [i] = new PVector (random(width), random(height)); 
+    diam [i] = random(10, 80);
+    vel[i] = PVector.random2D();
+    vel[i].mult(1);
+
+  }
 }
 
 void draw() {
-  //draw background to cover previous frame
-  background(0);
+  for (int i = 0; i < count; i ++) {
+ println("x" + i + " = " + loc[i].x + ", y" + i + " = " + loc[i].y);
+    //draw background to cover previous frame
+    background(204, 240, 229);
+    stroke(random(237), random(250), random(246));
+    strokeWeight(3); 
 
-  //draw ball
-  ellipse(x, y, diam, diam);
+    //draw ball
+    ellipse(loc[i].x, loc[i].y, diam[i], diam[i]);
+    a[i] = PVector.random2D(); 
+    a[i].mult(0.1);
 
-  //add velocity to position
-  x += velX;
-  y += velY;
+    //add velocity to position
+    loc[i].add(vel[i]); 
+    vel[i].add(a[i]); 
+    vel[i].limit(10); //limits velocity to 
 
-  //wrap the ball's position
-  if (x + diam/2 >= width) {
-    x = -diam/2;     
-  } else if (x - diam/2 <= 0) {
-    x = width + diam/2;
-  }
-  if (y + diam/2 >= height) {
-    y = -diam/2;
-  } else if (y - diam/2 <= 0) {
-    y = height + diam/2;
+
+    //wrap the ball's position
+    if (loc[i].x >= width) {
+      loc[i].x = 0;
+    } else if (loc[i].x <= 0) {
+      loc[i].x = width ;
+    }
+    if (loc[i].y >= height) {
+      loc[i].y = 0;
+    } else if (loc[i].y  <= 0) {
+      loc[i].y = height ;
+    }
   }
+}