​

 p5.js (https://p5js.org/)

 Under Creative Commons License

 https://creativecommons.org/licenses/by-sa/4.0/

 Written by Juan Carlos Ponce Campuzano, 30-Jul-2020

 https://jcponce.github.io/

​

*/  

// Updated 02-Sep-2024

​

let easycam;

​

// Butterfly model

let wl, wr;

​

function preload() {

  wl = loadModel('wl.obj');

  wr = loadModel('wr.obj');

}

​

function setup() {

  let canvas = createCanvas(windowWidth, windowHeight, WEBGL);

  setAttributes('antialias', true);

​

  //console.log(Dw.EasyCam.INFO);

​

  easycam = new Dw.EasyCam(this._renderer, {

    distance: 70

  });

  pixelDensity(2);

​

  //create attractor curve

  attractor = new LorenzAttractor();

​

  // create gui (dat.gui)

  let gui = new dat.GUI();

  gui.close();

  gui.add(parDef, 'Attractor');

  gui.add(parDef, 'Speed', 0, 1.5, 0.01).listen();

  gui.add(parDef, 'Particles').name("Butterflies");

  gui.add(parDef, 'Curve');

  gui.add(parDef, 'Animate').name("Animate C");

  gui.add(parDef, 'Randomize');

  gui.add(parDef, 'Preset');

  gui.add(this, 'backHome').name("Back home");

​

  // Place initial samples

  initSketch();

}

​

​

function draw() {

​

  // projection

  perspective(60 * PI / 180, width / height, 1, 5000);

​

  // BG

  background(255);

​

  ambientLight(255);

  rotateX(PI / 2);

  rotateZ(-0.6);

  translate(0, 0, -23);

​

  if (parDef.Particles == true) {

    //updating and displaying the particles

    for (let i = particles.length - 1; i >= 0; i -= 1) {

      let p = particles[i];

      p.update();

      p.display();

      if (p.x > 100 || p.y > 100 || p.z > 100 || p.x < -100 || p.y < -100 || p.z < -100) {

        particles.splice(i, 1);

        //currentParticle--;

        particles.push(new Particle(random(-5, 5), random(-5, 5), random(-5, 5), t, h));

      }

    }

  }

​

  // gizmo for reference :)

  //strokeWeight(0.1);

  //stroke(255, 32,  0); line(0,0,0,2,0,0);

  //stroke( 32,255, 32); line(0,0,0,0,2,0);

  //stroke(  0, 32,255); line(0,0,0,0,0,2);

​

​

  if (parDef.Curve === true) {

    push();

    noFill();

    beginShape();

    for (let k = 0; k < addPoints; k++) {

      stroke(41, 82, 163);

      strokeWeight(3);

      vertex(points[k].x, points[k].y, points[k].z);

    }

    endShape();

    pop();

  }

​

  if (parDef.Animate === false) {

    addPoints += 0;

    addPoints = NUM_POINTS;

  } else {

    addPoints += 2;

    if (addPoints > points.length - 2) {

      addPoints = 2;

    }

  }

​

}

​

​

​