David Tracy Changes

NOC_4_09_AdditiveBlending/NOC_4_09_AdditiveBlending.pde

@@ -6,20 +6,26 @@
 
 ParticleSystem ps;
 
-
 PImage img;
 
 void setup() {
+
   size(800, 200, P2D);
 
   // Create an alpha masked image to be applied as the particle's texture
   img = loadImage("texture.png");
 
   ps = new ParticleSystem(0, new PVector(width/2, 50));
   smooth();
+
 }
 
-void draw() {
-
+void draw() {  
+  blendMode(ADD);
+  background(0);
+  ps.run();
+  for (int i = 0; i < 10; i++) {
+    ps.addParticle();
+  } 
 }
 

NOC_4_09_AdditiveBlending/ParticleSystem.pde

@@ -10,13 +10,25 @@ class ParticleSystem {
 
   ArrayList<Particle> particles;    // An arraylist for all the particles
   PVector origin;        // An origin point for where particles are birthed
-
   PImage tex;
 
-ParticleSystem(int num, PVector v) {
-}
+  ParticleSystem(int num, PVector v) {
+    particles = new ArrayList();              // Initialize the arraylist
+    origin = v.get();                        // Store the origin point
+    for (int i = 0; i < num; i++) {
+      particles.add(new Particle(origin));    // Add "num" amount of particles to the arraylist
+    }
+  }
 
   void run() {
+    Iterator<Particle> it = particles.iterator();
+    while (it.hasNext()) {
+      Particle p = it.next();
+      p.run();
+      if (p.dead()) {
+       it.remove();
+      }
+    }
   }
 
   void addParticle() {
@@ -36,5 +48,5 @@ ParticleSystem(int num, PVector v) {
       return false;
     }
   }
-
 }
+