assignment-08 pattern

let numLines = 20;

let lineLength = 40;

let patternType = 0;

let lineColor;

​

function setup() {

  createCanvas(600, 600);

  noLoop();

  lineColor = color(random(255), random(255), random(255));

}

​

function draw() {

  background(255);

  randomSeed(0); 

​

  for (let i = lineLength / 2; i < width; i += lineLength) {

    for (let j = lineLength / 2; j < height; j += lineLength) {

      drawLinePattern(i, j);

    }

  }

}

​

function drawLinePattern(x, y) {

  let choice = (patternType === 0) ? floor(random(4)) : (floor(random(3)) + (patternType + 1)) % 4;

  stroke(lineColor);

  strokeWeight(3); // strokeWeight

  if (choice === 0 || choice === 1) {

    line((choice % 2 === 0) ? x : x + lineLength, y, (choice % 2 === 0) ? x + lineLength : x, y + lineLength);

  } else {

    line(x, (choice % 2 === 0) ? y : y + lineLength, x, (choice % 2 === 0) ? y + lineLength : y);

  }

}

​

function keyPressed() {

  if (key === 'r') {

    changeLineColorRandomly();

    redraw();

  } else if (key === 's') {

    changeArrangement();

    redraw();

  }

  if(key == 'x') {

    save('test.jpg');

  }

}

​

function changeLineColorRandomly() {

  lineColor = color(random(255), random(255), random(255));

}

​

function changeArrangement() {

  patternType = (patternType + 1) % 4;

}

​