Flocking 3D with perlin noise

Programming Questions

ventoline

Flocking 3D with perlin noise

in Programming Questions • 2 years ago

I am doing some research on flocking behaviour and I need it to be in 3D, I have noticed that flocking based on perlin noise is looking rather good (i might not need it though). Something else i am after is that the flock "stays together" as in many cases object are located within a cube and simply get relocated on the oppsite side of the cube when they exit the cube.

I found the perfect example here:
http://www.flight404.com/_videos/flowField/flocking.html

however i couldnt find any source asssociated with it, is there something similar i could start working from?

Replies(3)

nakednous

Re: Flocking 3D with perlin noise

2 years ago

proscene comes with a flock example which uses a third person camera profile. It may be handy. It'd be cool to attach the camera to one of this super-speed perlin noise boids ;)

ventoline

Re: Flocking 3D with perlin noise

2 years ago

I have tried to implement the proscene example using a generated arrayList of boids, it runs but the boids are never added to the scene, i guess i miss some settings from proscene
http://disi.unal.edu.co/grupos/remixlab/local/projects/proscene-1.1.0/demos/Flock/applet/index.html ?

here is my code (the boids.pde is identical to the original):

void draw() {
background(110);
fill(255);
textMode(SCREEN);
textFont(font);
text("Kinect FR: " + (int)kinect.getDepthFPS() + "\nProcessing FR: " + (int)frameRate,10,16);

//ambientLight(128,128,128);
//directionalLight(255, 255, 255, 0, 1, -100);
//noFill();
   stroke(255);
line(0, 0, 0, 0, flockHeight, 0);
line(0, 0, flockDepth, 0, flockHeight, flockDepth);
line(0, 0, 0, flockWidth, 0, 0);
line(0, 0, flockDepth, flockWidth, 0, flockDepth);

line(flockWidth, 0, 0, flockWidth, flockHeight, 0);
line(flockWidth, 0, flockDepth, flockWidth, flockHeight, flockDepth);
line(0, flockHeight, 0, flockWidth, flockHeight, 0);
line(0, flockHeight, flockDepth, flockWidth, flockHeight, flockDepth);

line(0, 0, 0, 0, 0, flockDepth);
line(0, flockHeight, 0, 0, flockHeight, flockDepth);
line(flockWidth, 0, 0, flockWidth, 0, flockDepth);
line(flockWidth, flockHeight, 0, flockWidth, flockHeight, flockDepth);

if(!currentCP.equals(scene.currentCameraProfile())) { // cameraProfile changed
    adjustFrameRate();
    currentCP = scene.currentCameraProfile();
}
// Translate and rotate
translate(flockWidth/2,flockHeight/2,flockDepth/2);
// rotateY(a);
if (showing){   drawKinect();}
if (flocking) { createBoids(pointHolder);}
}

void adjustFrameRate() {
if(scene.currentCameraProfile().equals(thirdPersonCP))
    scene.setFrameRate(1000/scene.animationPeriod());//restarts animation
else
    scene.setFrameRate(60);//restarts animation
}

void pointArray(){
if(!showing){
    int test =0;
      pointHolder = new ArrayList();
      flockList = new ArrayList();
        depth = kinect.getRawDepth();
        for(int x=0; x<w; x+=skip) {
    for(int y=0; y<h; y+=skip) {
     offset = x+y*w;
     rawDepth = depth[offset];
     if (rawDepth > mindepth && rawDepth < maxdepth){
      PVector v = depthToWorld(x,y,rawDepth);

   PVector p3d =new PVector(v.x*factor,v.y*factor,factor-v.z*factor);
   pointHolder.add(p3d);
   //println( pointHolder.size());
     if(pointHolder.size() < 200){ flockList.add(new Boid(p3d));
    println("flockList "+ flockList.size());
}
    }
   }

}

   scene.startAnimation();
flocking = true;
println("pointHolder contains"+ pointHolder.size() + "points");
println("flockList contains"+ flockList.size() + "boids");
   // }
}
}
void createBoids(ArrayList pointHolder){
// print("create "+ flockList.size()+" boids, ");
   stroke(255, 0 , 45);
   for ( int i =0; i<flockList.size(); i++){
   Boid tempBoid = (Boid) flockList.get(i);
   tempBoid.run(flockList); // tell the temporary boid to execute its run method
   tempBoid.render(); // tell the temporary boid to execute its render method
}
}
void keyPressed() {
if (key == ' '){
showing = !showing;
    pointArray();
}

}

nakednous

Re: Flocking 3D with perlin noise

2 years ago

not sure what do you mean by "adding boids to the scene"? They're drawn by calling their draw method from within PApplet.draw (that's all there's to it). In order to enable the third person camera profile you need to track the position and orientation of each boid. This is why we attach an InteractiveAvatarFrame to each boid.

I didn't test your sketch, but maybe your issue is related to the way you instantiate your objects. I'd suggest you to try first to draw something using your setup without proscene to see how it goes.

-jp

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