// NYUSH F24 - gohai

​

let lines; // array of individual lines

let input; // the entire text

let probabilities;

​

let textMargin = 20;

let textX = textMargin;

let textY = textMargin;

​

function preload() {

  lines = loadStrings("text.txt");

  frameRate(5);

}

​

function setup() {

  createCanvas(400, 400);

  background(220);

  textSize(18);

​

  input = lines.join(" ");

  probabilities = analyze(input);

  //console.log(probabilities);

}

​

function draw() {

  let nextChar = generate(probabilities);

  //console.log(nextChar);

​

  // print character to canvas

  if (textX + textWidth(nextChar) >= width - textMargin) {

    textY = textY + textAscent() + textDescent();

    textX = textMargin;

  }

  text(nextChar, textX, textY);

  textX = textX + textWidth(nextChar);

}

​

function analyze(str) {

  let counts = {};

  // count how often each character occurs

  for (let i = 0; i < str.length; i++) {

    let chr = str[i];

    if (counts[chr]) {

      counts[chr]++; // seen before, add one

    } else {

      counts[chr] = 1; // start with count 1

    }

  }

  // turn the count into probability (0-1)

  for (let chr in counts) {

    counts[chr] = counts[chr] / str.length;

  }

  return counts;

}

​

function generate(probabilities) {

  // pick a random number 0..1

  let rand = random();

  let sum = 0;

  for (let chr in probabilities) {

    // check if we landed "inside" the probability

    // of the current character (higher probability

    // == more chance for a match)

    if (sum + probabilities[chr] >= rand) {

      return chr;

    }

    sum = sum + probabilities[chr];

  }

}

​