topical media & game development
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graphic-processing-site-examples-3D-Transform-Birds-Birds.pde / pde
Crazy Flocking 3D Birds by Ira Greenberg. Simulates a flock of birds using a Bird class and nested pushMatrix() / popMatrix() functions. Trigonometry functions handle the flapping and sinuous movement. 

  
  
  // Flock array
  int birdCount = 200;
  Bird[]birds = new Bird[birdCount];
  float[]x = new float[birdCount];
  float[]y = new float[birdCount];
  float[]z = new float[birdCount];
  float[]rx = new float[birdCount];
  float[]ry = new float[birdCount];
  float[]rz = new float[birdCount];
  float[]spd = new float[birdCount];
  float[]rot = new float[birdCount];
  
  void setup() {
    size(640, 360, P3D);
    noStroke();
  
    // Initialize arrays with random values
    for (int i = 0; i < birdCount; i++){
      birds[i] = new Bird(random(-300, 300), random(-300, 300), 
                 random(-500, -2500), random(5, 30), random(5, 30)); 
  
      x[i] = random(20, 340);
      y[i] = random(30, 350);
      z[i] = random(1000, 4800);
      rx[i] = random(-160, 160);
      ry[i] = random(-55, 55);
      rz[i] = random(-20, 20);
      spd[i] = random(.1, 3.75);
      rot[i] = random(.025, .15);
    }
  }
  
  void draw() {
    background(0);
    lights();
    for (int i = 0; i < birdCount; i++){
      birds[i].setFlight(x[i], y[i], z[i], rx[i], ry[i], rz[i]);
      birds[i].setWingSpeed(spd[i]);
      birds[i].setRotSpeed(rot[i]);
      birds[i].fly();
    }
  }
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 20/2/2008

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