Wanderer

BouncingWithVectors/BouncingWithVectors.pde

@@ -1,37 +1,103 @@
-//declare variables
-float x, y, velX, velY, diam;
+float gravity_acceleration = 0.98;
+float air_resistance = 0.99;
+
+int bnum = 50;
+
+int frame_rate = 60;
+
+//declare a class which contains the ball variables
+class Ball{
+  PVector pos;
+  PVector vel;
+
+  float diam;
+  float hue;
+
+  Ball(){
+    //initialize variables
+    pos = new PVector(random(width), random(height));
+    vel = PVector.random2D();
+    vel.mult(5);
+
+    diam = random(10, 90);
+    hue = random(255);
+  }
+
+  void run(Ball[] balls){
+    //bounce off of other balls
+    for(Ball ball : balls){
+      if(ball != this && dist(pos.x, pos.y, ball.pos.x, ball.pos.y) < diam/2 + ball.diam/2){
+        pos.x += ((diam)) * ((pos.x - ball.pos.x)/dist(pos.x, pos.y, ball.pos.x, ball.pos.y) * 0.1);
+        pos.y += ((diam)) * ((pos.y - ball.pos.y)/dist(pos.x, pos.y, ball.pos.x, ball.pos.y) * 0.1);
+        vel.x *= -air_resistance;
+        vel.y *= -air_resistance;
+      }  
+    }
+
+    //bounce ball if it hits walls
+    if (pos.x + diam/2 >= width) {
+      vel.x = -abs(vel.x);    //if the ball hits the right wall, assign x velocity the negative version of itself
+      pos.x = width - diam/2;    
+    } else if (pos.x - diam/2 <= 0) {
+      vel.x = abs(vel.x);     //if the ball hits the left wall, assign x velocity the positive version of itself
+      pos.x = diam/2;
+    }
+    if (pos.y + diam/2 >= height) {
+      vel.y = -abs(vel.y);
+      pos.y = height - diam/2;
+    } else if (pos.y - diam/2 <= 0) {
+      vel.y = abs(vel.y);
+      pos.y = diam/2;
+    }
+
+    //bounce off of the mouse cursor
+    if(dist(pos.x, pos.y, mouseX, mouseY) < diam){
+      vel.y = -10;
+    }
+
+    //simulate air resistance
+    vel.x *= air_resistance;
+    vel.y *= air_resistance;
+
+    //simulate gravity
+    vel.y += gravity_acceleration;  
+
+    //add velocity to position
+    pos.add(vel);
+
+    //increment the hue
+    hue++;
+  }
+  void bdraw(){
+    //draw ball
+    fill(hue % 255, 255, 255);
+    ellipse(pos.x, pos.y, diam, diam);
+  }
+}
+
+Ball[] balls = new Ball[bnum];
 
 void setup() {
+
+  frameRate(frame_rate);
+
+  colorMode(HSB, 255);
+
   //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);
+
+  //initialize all of the balls
+  for(int i = 0; i < bnum; i++){
+    balls[i] = new Ball();
+  }
 }
 
 void draw() {
   //draw background to cover previous frame
   background(0);
-
-  //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(Ball ball: balls){
+    ball.run(balls);
+    ball.bdraw();
   }
+}

Wanderer/Wanderer.pde

@@ -1,37 +1,73 @@
-//declare variables
-float x, y, velX, velY, diam;
+PImage doge;
 
-void setup() {
-  //set size of canvas
-  size(800, 600);
+PVector target;
 
-  //initialize variables
-  x = width/2;
-  y = height/2;
-  diam = 80;
-  velX = random(-5, 5);
-  velY = random(-5, 5);
-}
-
-void draw() {
-  //draw background to cover previous frame
-  background(0);
+PVector pos, vel, acc;
 
-  //draw ball
-  ellipse(x, y, diam, diam);
+int time = 0;
 
-  //add velocity to position
-  x += velX;
-  y += velY;
+void setup(){
+  doge = loadImage("doge.png");
+
+  size(640, 480);
+
+  noStroke();
+
+  background(0);
+
+  pos = new PVector(width/2, height/2);
+  vel = new PVector(0, 0);
+  acc = new PVector(0, 0);
+
+  textFont(createFont("comicbd.ttf", 16));
+
+  colorMode(HSB, 100);
+}
 
-  //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;
+void draw(){  
+  if(time == 0){
+    vel.mult(0.75);
+
+    acc = PVector.random2D();
+    acc.mult(random(0.25));
+
+    time = (int)random(1, 30);
+
+    fill(random(100), 255, 255);
+
+    switch((int)random(20)){
+      case 0: text("much wow",          random(width), random(height)); break;
+      case 1: text("many centipde",     random(width), random(height)); break;
+      case 2: text("great amaze",       random(width), random(height)); break;
+      case 3: text("many programming",  random(width), random(height)); break;
+      case 4: text("such binary",       random(width), random(height)); break;
+      case 5: text("many letter",       random(width), random(height)); break;
+      case 6: text("lots of process",   random(width), random(height)); break;
+      case 7: text("much random",       random(width), random(height)); break;
+      case 8: text("so unpredictable",  random(width), random(height)); break;
+      case 9: text("wowe",              random(width), random(height)); break;
+    }
   }
+
+  time--;
+
+  vel.add(acc);
+  pos.add(vel);
+
+  translate(pos.x, pos.y);
+  scale(0.25, 0.25);
+  translate(-doge.width/2, -doge.height/2);
+
+  image(doge, 0, 0);
+
+  resetMatrix();
+
+  if(pos.x > width)
+    pos.x = 0;
+  if(pos.y > height)
+    pos.y = 0;
+   if(pos.x < 0)
+    pos.x = width;
+  if(pos.y < 0)
+    pos.y = height;
+}