let b

let emitters = []

​

let bacteriaNum = 500

let threshold = 0.25

let bacteriaRadius = 5

let bacteriaSpeed = 0

let bacteriaNumBox

​

​

let emitterRadius = 2 * bacteriaRadius

let attractNum = 0

let attractFreq = 1

let repelNum = 0

let repelFreq = 1

let emitterMovement = 0

let emitterSpeed = 0.5

let pulseSize = 40

let minPulseSpeed = 0.25

​

let chemicalMode = "ring"

let chemicalDecay = 0.999

​

​

let speedMod = 1

let attract

let repel

​

let enterButton

​

let firstTime = true

​

function firstSetup() {

  bacteriaNumBox = createInput()

  bacteriaNumBox.value(bacteriaNum)

  bacteriaNumBox.size(50, 15)

  bacteriaNumBox.position(0, 20)

​

  updateButton = createButton('Update Bacteria')

  updateButton.mouseClicked(assignBacteria)

  updateButton.position(bacteriaNumBox.width, 20)

​

  bacteriaTypeThresholdBox = createInput()

  bacteriaTypeThresholdBox.value(0.1)

  bacteriaTypeThresholdBox.size(50, 15)

  bacteriaTypeThresholdBox.position(updateButton.x + updateButton.width + 10, 20)

​

  resetButton = createButton('Reset Bacteria')

  resetButton.mouseClicked(assignThreshold)

  resetButton.position(bacteriaTypeThresholdBox.x + bacteriaTypeThresholdBox.width, 20)

​

  undoButton = createButton('Undo Emitter Placement')

  undoButton.mouseClicked(deleteEmitter)

  undoButton.position(resetButton.x + undoButton.width + 20, 20)

​

​

}

​

function assignBacteria() {

  bacteriaNum = bacteriaNumBox.value()

}

​

function assignThreshold() {

  threshold = bacteriaTypeThresholdBox.value()

  if (threshold > 1) {

    threshold = 1

    bacteriaTypeThresholdBox.value(1)

  } else if (threshold < 0) {

    threshold = 0

    bacteriaTypeThresholdBox.value(0)

  }

  bacteriaNum = 0

  editBacteria()

  assignBacteria()

  editBacteria()

}

​

function mousePressed() {

  if ((0 < mouseX && mouseX < width) && (0 < mouseY && mouseY < height)) {

    if (mouseButton === LEFT) {

      emitters.push(new emitter(mouseX, mouseY, attract, 1, 10, 0.5))

    }

    if (mouseButton === CENTER) {

      emitters.push(new emitter(mouseX, mouseY, repel, 1, 10, 0.5))

    }

  }

}

​

function addBacteria() {

  for (b = bacterium.length; b < bacteriaNum; b++) {

    if (random(0, 1) > threshold) {

      bacterium.push(new bacteria(random(0, width), random(0, height), random(0.5,1.25), attract, repel, bacteriaRadius))

    } else {

      bacterium.push(new bacteria(random(0, width), random(0, height), random(0.5,1.25), repel, attract, bacteriaRadius))

    }

  }

}

​

function addAttract() {

  for (e = 0; e < attractNum; e++) {

    emitters.push(new emitter(random(0, width), random(0, height), attract, attractFreq, emitterRadius, 0.5))

  }

}

​

function addRepel() {

  for (e = 0; e < repelNum; e++) {

    emitters.push(new emitter(random(0, width), random(0, height), repel, repelfreq, emitterRadius, 0.5))

  }

}

​

function editBacteria() {

  if (bacterium.length > bacteriaNum) {

    while (bacterium.length > bacteriaNum) {

      bacterium.splice(0, 1)

    }

  } else if (bacterium.length < bacteriaNum) {

    addBacteria()

  }

}

​

function deleteEmitter() {

  emitters.splice(emitters.length - 1, 1)

}

​

​

​

function setup() {

  let canvasWidth = windowWidth - 20

  let canvasHeight = windowHeight - 100

  bacteriaNum = round((canvasWidth * canvasHeight) / 1500)

​

  if (firstTime) {

    firstSetup()

    firstTime = false

  }

  let canvas = createCanvas(canvasWidth, canvasHeight);

  canvas.position(0, 45)

  ellipseMode(CENTER)

​

  attract = color(0, 255, 0, 100)

  repel = color(255, 0, 0, 100)

​

  addBacteria()

  addAttract()

  addRepel()

​

}

​

function draw() {

  background(0);

​

  editBacteria()

​

​

  for (let b of bacterium) {

    b.update()

    b.draw()

  }

​

  for (let e of emitters) {

    e.emit()

    e.draw()

  }

​

}