Discourse _validateParameters is not a function

let video;

let font;

let polygons;

let polygonsX = [];

let polygonsY = [];

​

var fontfile = "Oswald.ttf";

​

//sound array

let mySounds = [];

let mySound1;

let mySound2;

let mySound3;

​

let f1 = 20;

let f2 = 51;

let size = 600;

​

// This isn't used, but it might be better to initialize this in the setup

// function. Some p5 library resource may not be declared at the time your

// script is evaluated.

// Also you should use let here.

fft = new p5.FFT();

​

function preload() {

  font = loadFont(fontfile);

​

  //sound

  mySound1 = loadSound('TADA.WAV');

  mySound2 = loadSound('CHIMES.WAV');

  mySound3 = loadSound('CHORD.WAV');

  //剩下的sound都在这里

}

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  textFont(font);

  frameRate(60);

​

  // Not used, but this ought to be declared with let somewhere

  // global variables are bad practice

  amplitude = new p5.Amplitude();

​

  //create sound array

  mySounds = [mySound1, mySound2, mySound3];

​

  //scence manager

  mgr = new SceneManager();

  mgr.showScene(intro);

  // I added this because otherwise there was no reference to the question scene

  mgr.addScene(question);

​

  // mgr.showNextScene();

}

​

// Added a way to move to the next scene for testing

function doubleClicked() {

  mgr.showNextScene();

}

​

// On window resize, update the canvas size

function windowResized() {

  resizeCanvas(windowWidth, windowHeight);

}

​

// Render loop that draws shapes with p5

function draw() {

  // scene

  mgr.draw();

}

​

​

function intro() {

  this.draw = function() {

    background(255);

    noFill();

    let i = floor(millis() / 2000) % 2;

    let angle1 = map(millis() % 1000, 0, 1000, 0, TWO_PI);

    let angle2 = map(millis() % 2000, 0, 2000, 0, TWO_PI);

    arc(width / 2, height / 2, 200, 200, i == 0 ? angle1 : angle2, i == 0 ? angle2 : angle1);

  };

}

​

function question() {

  console.log('iam here');

​

  var video;

  var snapshot = [];

  this.enter = function() {

    // added background to make the scene transition obvious

    background('gray');

    video = createCapture(VIDEO);

    video.size(640, 480);

    video.hide();

    setTimeout(askQuestion, 5000);

    setTimeout(systemText, 10000);

    setTimeout(systemError, 10000);

  }

  this.draw = function() {

    image(video, 10, 10, 128, 96);

  }

​

  function askQuestion() {

    //alex introduces itself, 15 sec audio

    mySound2.play();

  }

​

  function systemError() {

    mySound3.play();

  }

​

  function systemText() {

    textSize(50);

    noStroke();

    fill("#ffb0ea");

    textAlign(CENTER, CENTER);

    text("system error\n the next programe will be excuted ", width / 2, height / 2);

  }

}

​