currently happily under construction :)

audio sensitive particles with p5.js

This example shows how to construct a p5.js application to run an object oriented approach, using independent particles to draw the stage canvas buffer. Here is a link to an online demo.

// particle class aP.js
class aP{
    
 constructor( _id,_pos){
    
   // setup the basic parameters of each particle
    this.id = _id;
    this.pos = _pos;
    this.vel  = createVector(0,0);
    this.ppos =  this.pos;
  
  }
   
  // drawing routine for each particle
  drawMe(_thick){
     
    noStroke();
    ellipse(this.pos.x,this.pos.y,_thick,_thick);
     
    this.pos.x +=  (noise(this.id*.12,millis()*.0001)-.5)*10;
    this.pos.y +=2.;
     
    if( this.pos.y > height){
     
       this.pos.y = 0;
       this.pos.x = random(width);
       
    }
  }
 
 
}

Main Loop

// main script sketch.js
 
// basic variable definitions
let mic;
const particles  = [] ;
let pcount = 120;
let samp = 0;
 
// -----------------------
 
function setup() {
  createCanvas(window.innerWidth, window.innerHeight);
  background(220);
   
   // Create an Audio input
  mic = new p5.AudioIn();
  mic.start();
    
  // draw a slight smoothed shadow ( CPU INTENSE!!! )
    drawingContext.shadowColor = color(0, 0, 0,20);
    drawingContext.shadowBlur =20;
    drawingContext.shadowOffsetX = 5;
    drawingContext.shadowOffsetY = -5;
 
   
  for(let i=0;i<pcount;i++){
     
      let ipos = createVector(random(width),random(height));
      let np = new aP(i,ipos); 
      particles.push(np);
     
  }
   
}
 
// ----------------------- loop function 
 
function draw() {
      
  // read out the current mic amplitude
  samp = lerp(samp, mic.getLevel() * 1000 ,.1);
     
  // update and draw each particle
  for(let i=0;i<particles.length;i++){
   
     let cp = particles[i];
    cp.drawMe(samp+3);
     
  }
  
}