* Sketch: DPMLine_005

 * Parent Sketch: DPMLine_001

 * Type: static

 *

 * Summary : Random distribution of lines on a surface

 *

 * GIT:

 * Author: mark webster 2019

 * https://dpmanual.bitbucket.io

 * https://designingprograms.bitbucket.io

 */

​

/////////////////////////// GLOBALS ////////////////////////////

​

let randSeed;

let lineLength = 10;

let sw = 30;

let isRandAngle = false;

/////////////////////////// SETUP ////////////////////////////

​

function setup() {

  createCanvas(500, 500);

  background(0);

  stroke(255);

  strokeCap(SQUARE);

  randSeed = random(5000);

}

​

/////////////////////////// DRAW ////////////////////////////

function draw() {

  background(0);

  randomSeed(randSeed);

  strokeWeight(sw);

  let angle = 0;

  let numLines = map(mouseX, 0, width, 1, 150);

  let a = map(mouseY, 0, height, 0, 360);

  for (let i=0; i<numLines; i++) {

    if (isRandAngle) {

      angle = random(a);

    } else {

      angle = 0;

    }

    let randLen = random(10, 200);

​

    let x = random(width);

    let y = random(height);

    push();

    translate(x, y);

    rotate(radians(angle+a));

    line(-randLen-lineLength, 0, randLen+lineLength, 0);

    pop();

  }

}

​

​

function keyPressed() {

  if (key == 's') {

    saveFrame("export_DPMOsc_002_###.png");

  }

  if (key == 'r') {

    randSeed = random(5000);

  }

  if (key == 'a') {

    isRandAngle = !isRandAngle;

  }

  if (key == '+') {

    sw+=5;

  }

  if (key == '-') {

    if (sw>0)

      sw-=5;

  }

  if (key == 'l') {

    lineLength+=5;

  }

  if (key == 'm') {

    lineLength-=5;

  }

}

​