// G Edwards, 01 Aug 2019

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let imageName = "coal-loader-palette-trimmed.png";

let imageURL = "https://modulostudio.s3-ap-southeast-2.amazonaws.com/images/coal-loader-palette-trimmed.png";

let img = null;

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// Load the image in the preload() function, waits until complete.

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function preload() {

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  prt("Loading", imageURL);

  img = loadImage(imageURL, () => prt("Loaded ok"), () => prt("Load failed"));

  //img = loadImage(imageName, () => prt("Loaded ok"), () => prt("Load failed"));

}

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// Not much to do in setup()

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function setup() {

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  createCanvas(1350,150);

}

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function draw() {

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  background(color(128));

  // img = createImage(imageURL);

  image(img, 0, 30);

  writer = createWriter("paletteList.txt");

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  let offset = 8;

  let step = 15.34;          // trial and error number. Palette image must have been scaled.

  for( let n = 0; n < 85; n++) {

    strokeWeight(3);

    stroke(255,0,0);

    let xx = n * step + offset;

    point(xx, 45);           // put a point on the palette cell, to check our positioning

    let clr = get(xx, 40);   // get the cell colour - avoid the point of course !

    fill(clr);               // draw a square to confirm colours are correct  

    noStroke();

    square(n*step + 2, 12, 12);

    let hexColour = (n+1).toString() + ":" + hex(red(clr),2) + hex(green(clr),2) + hex(blue(clr),2);

    prt(hexColour);  

    writer.print(hexColour);

  }

  writer.close();

  noLoop();

}  

function prt(...args) {

  console.log(...args);

}

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