let angle = 0;

let maxRpm = 100;

let lastMillis = 0;

​

let gui;

//let step;

/*

var Fan = 1;

var FanMin = 1;

var FanMax = 9;

var FanStep = 1;

​

var Rotations = 0;

var RotationsMin = 0;

var RotationsMax = 255;

var RotationsStep = 5;

*/

let speed = [10, 20, 30, 40, 50, 60, 70, 80, 90]; // speed settings

let angles = [0, 0, 0, 0, 0, 0, 0, 0, 0];

​

let params = { //______________ gui list : number make automatically type sliders

    speed0: speed[0],

    speed1: speed[1],

    speed2: speed[2],

    speed3: speed[3],

    speed4: speed[4],

    speed5: speed[5],

    speed6: speed[6],

    speed7: speed[7],

    speed8: speed[8],

}

​

function gui_setup() {

  gui = createGui('Fan Speed');

  sliderRange(0, 255, 5);

//  gui.addGlobals('Rotations', 'Fan'); // multiplex idea possible with this lib?

  gui.addObject(params);

}

​

function gui_readback() {

  speed[0] = params.speed0;

  speed[1] = params.speed1;

  speed[2] = params.speed2;

  speed[3] = params.speed3;

  speed[4] = params.speed4;

  speed[5] = params.speed5;

  speed[6] = params.speed6;

  speed[7] = params.speed7;

  speed[8] = params.speed8;  

}

​

function setup() {

  createCanvas(2200, 200);

  rectMode(CENTER);

  angleMode(DEGREES);

​

  lastMillis = millis();

  gui_setup();  

}

​

​

function keyPressed() {

  if (keyCode == RETURN) {

    console.log(speed);

    console.log(angles);

  }

  if (key == 'c' ) params.speed0 = 0; //test, works for value but not for slider pos???

}

​

function updateAngle() {

  let newMillis = millis();

  let elapsedMillis = newMillis - lastMillis;

  //  let rpm = maxRpm * (Rotations / 255.0);

  for (let i = 0; i < many; i++) {

    let rpm = maxRpm * (speed[i] / 255.0);

    let rps = rpm / 60;

    let rev = rps * (elapsedMillis / 1000);

    angles[i] += 360 * rev;

  }

  lastMillis = newMillis;

}

​

let many = 9;

​

function draw() {

  background(125);

  translate(150, 100);

  gui_readback(); // very bad way, should find how to use a change event 

  updateAngle();

  for (let i = 0; i < many; i++) draw_fan(angles[i]);

}

​

function draw_fan(angle) {

  translate(150, 0);

  push();

  rotate(angle);

  stroke(0);

  fill(255, 255, 255);

  rect(0, 0, 25, 150);

  circle(0, 0, 40);

  pop();

}