----- Coding Tutorial by Patt Vira ----- 

Name: Slime Molds (Physarum)

Video Tutorial: https://youtu.be/VyXxSNcgDtg

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References: 

1. Algorithm by Jeff Jones: https://uwe-repository.worktribe.com/output/980579/characteristics-of-pattern-formation-and-evolution-in-approximations-of-physarum-transport-networks

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Connect with Patt: @pattvira

https://www.pattvira.com/

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*/

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let molds = [];

let num = 4000;

let d;

let pg;

​

function setup() {

  createCanvas(500, 500);

  angleMode(DEGREES);

  d = pixelDensity();

​

  for (let i = 0; i < num; i++) {

    molds[i] = new Mold();

  }

  pg = createGraphics(500, 500);

}

​

function drawBase(){

  pg.background(0)

  pg.push();

  pg.noFill();

  pg.strokeWeight(5);

  pg.stroke(255,20);

  // pg.ellipse(width / 2, height / 2, 100, 100 * sin(frameCount * 1));

  pg.pop();

  pg.push();

  pg.translate(width / 2, height / 2);

  pg.stroke(255,20);

  pg.strokeWeight(5);

  pg.noFill();

  // ellipse(0, 0, 40 * sin(frameCount * 2), 40 * cos(frameCount * 2));

  // pg.ellipse(0,0,40+map(mouseX,0,width,0,250),40+map(mouseY,0,height,0,250))

  pg.pop();

}

​

​

function draw() {

  background(0, 10);

  push();

  noFill();

  stroke(255);

  strokeWeight(1)

  fill(255)

  // ellipse(width / 2, height / 2, 100, 100 );

  textAlign(CENTER,CENTER)

  textSize(width/2 )

  // text("S L I M E",0,0,width,height)

  text(key,0,0,width,height)

  pop();

  push();

  translate(width / 2, height / 2);

  stroke(255);

  strokeWeight(10);

  noFill();

  // ellipse(0, 0, 40 * sin(frameCount * 2), 40 * cos(frameCount * 2));

  // ellipse(mouseX,mouseY,40,40)

  ellipse(0,0,mouseX,mouseY)

  pop();

  drawBase()

  // image(pg,0,0)

  loadPixels();

​

  for (let i = 0; i < num; i++) {

    if (key == "s") {

      // If "s" key is pressed, molds stop moving

      molds[i].stop = true;

      updatePixels();

      noLoop();

    } else {

      molds[i].stop = false;

    }

​

    molds[i].update();

    molds[i].display();

  }

}

​