cebulacamp_3D_scene/sketch.js

let globalScaleVar = 200;

class RotatingOnion {
  constructor(angles, scale) {
    this.angles = { ...angles }; // Destructure
    this.scale = scale;
    this.orbitingObjects = []; // Array to hold orbiting objects

    // Onion oscillation
    this.oscillationOffset = random(1000); // Tracks the time or phase for oscillation
    this.xOscillationAmplitude = 10; // Amplitude for angle.x oscillation
    this.zOscillationAmplitude = 10; // Amplitude for angle.z oscillation
    this.xBase = angles.x; // Base value for angle.y oscillation
    this.zBase = angles.z; // Base value for angle.z oscillation
  }

    // Add an orbiting object to the onion
  addOrbitingObject(model, orbitRadius, speed, scale, tiltAngleX, tiltAngleY) {
    const tiltAngle = { x: tiltAngleX, y: tiltAngleY };  // Pass both X and Y tilt angles
    this.orbitingObjects.push(new OrbitingObject(this, model, orbitRadius, speed, scale, tiltAngle));
  }

  update() {
    // Increment the angles as needed per frame
    this.angles.y += 0.1;

    this.oscillationOffset += 1; // Increment the oscillation phase
    this.angles.x = this.xBase + this.xOscillationAmplitude * sin(this.oscillationOffset*0.7);
    this.angles.z = this.zBase + this.zOscillationAmplitude * cos(this.oscillationOffset*0.4);

    // Update each orbiting object
    for (let obj of this.orbitingObjects) {
      obj.update();
    }
  }

  display() {
    push();
    rotateX(this.angles.x);
    rotateY(this.angles.y);
    rotateZ(this.angles.z);
    scale(this.scale);
    model(onion_stroke);
    push()
      emissiveMaterial(0,0,0)
      model(onion_fill);
    pop()

    // Display all orbiting objects
    for (let obj of this.orbitingObjects) {
      obj.display();
      this.displayTorus(obj.orbitRadius, obj.tiltAngle);
    }
    pop();
  }

  // Function to display a torus representing the orbit path
  displayTorus(orbitRadius, tiltAngle) {
    push();
    stroke(150, 150, 150); // Set the color of the orbit path
    strokeWeight(0.5);
    noFill();

    // Apply the tilt before rendering the torus
    rotateY(-tiltAngle.y); // Apply Y-axis tilt for the torus
    rotateX(90-tiltAngle.x); // Apply the tilt angle to rotate the orbit plane
    torus(orbitRadius, 0.001); // Radius and tube radius of the torus
    pop();
  }
}

class OrbitingObject {
  constructor(parent, model, orbitRadius, speed, scale, tiltAngle) {
    this.parent = parent; // The parent object (Onion)
    this.model = model
    this.orbitRadius = orbitRadius;
    this.speed = speed;  // Orbiting speed (angular speed)
    this.scale = scale;
    this.rotationAngle_x = random(360);
    this.rotationAngle_y = random(360);
    this.rotationAngle_z = random(360);
    this.rotationSpeed_x = random(0.5, 2);
    this.rotationSpeed_y = random(0.5, 2);
    this.rotationSpeed_z = random(0.5, 2);

    this.angle = random(360); // Start at a random position in the orbit
    this.tiltAngle = tiltAngle;
  }

  update() {
    // Update the angle to simulate rotation around the parent
    this.angle += this.speed;

    // Rotate in place
    this.rotationAngle_x += this.rotationSpeed_x;
    this.rotationAngle_y += this.rotationSpeed_y;
    this.rotationAngle_z += this.rotationSpeed_z;

    // Calculate the position of the orbiting object in the un-tilted plane
    const x = this.orbitRadius * cos(this.angle);
    const z = this.orbitRadius * sin(this.angle);
    const y = 0; // Or any base y value if it's not 0

    // Apply the tilt transformation around both the X and Y axes
    const tiltXCos = cos(this.tiltAngle.x);
    const tiltXSin = sin(this.tiltAngle.x);
    const tiltYCos = cos(this.tiltAngle.y);
    const tiltYSin = sin(this.tiltAngle.y);

    // Tilt transformation around the X-axis (first)
    let newX = x;
    let newY = y * tiltXCos + z * tiltXSin;
    let newZ = z * tiltXCos - y * tiltXSin;

    // Tilt transformation around the Y-axis (second)
    this.x = newX * tiltYCos - newZ * tiltYSin;
    this.y = newY;
    this.z = newZ * tiltYCos + newX * tiltYSin;
  }

  display() {
    push();
    translate(this.x, this.y, this.z); // Move to the correct orbit position

    // Apply in-place rotation
    rotateX(this.rotationAngle_x)
    rotateY(this.rotationAngle_y);
    rotateZ(this.rotationAngle_z)

    scale(this.scale);
    model(this.model);
    pop();
  }
}

function preload() {
  onion_stroke = loadModel('./assets/onion_stroke.obj');
  onion_fill = loadModel('./assets/onion_fill.obj');
  font = loadFont('./assets/jgs5.ttf');
}

function setup() {
  createCanvas(windowWidth, windowHeight, WEBGL);
  angleMode(DEGREES);
  noStroke();
  textFont(font, 60);
  textAlign(CENTER, CENTER);
  randomSeed()

  // Initialize the onion object with radius, angles, and scale
  onionObj = new RotatingOnion({ x: 0, y: random(360), z: 180 }, globalScaleVar);

  // Add orbiting objects to the onion
  for (let i = 1.8; i <= 4.8; i += 0.6) {
    onionObj.addOrbitingObject(
      onion_fill,
      i,
      random(0.1, 0.8),
      globalScaleVar * 0.0001 * random(1, 6),
      random(0, 30),
      random(0, 30)
    );
  }
}

function draw() {
  background(0);
  orbitControl();
  ambientLight(100);
  shininess(0);
  specularMaterial(255, 255, 255);

  directionalLight(
    210, 0, 255, // color
    180, 180, 0  // direction
  );

  directionalLight(
    0, 255, 180, // color
    -180, -180, 0 // direction
  );

  // Update the onion object
  onionObj.update();

  // Display the onion and its orbiting objects
  onionObj.display();

  fill(255, 255, 255);
  text('PLACEHOLDER', 0, 350);
}

function windowResized() {
  resizeCanvas(windowWidth, windowHeight);
}