* Sketch: DPMWave_001

 * Parent Sketch: none

 * Type: dynamic

 *

 * Summary : Harmonic Motion 

 *

 * GIT:

 * Author: Ferdinand Sorg

 * https://openrndr.org/

 * https://dpmanual.bitbucket.io

 * https://designingprograms.bitbucket.io

 */

​

let size = 5;

let isAlternate = false;

let cnv;

function setup() {

   cnv = createCanvas(500, 500);

  noStroke();

}

​

function draw() {

    background(0);

    fill(255);

    let num = map(mouseX, 0, cnv.width*2, 0, 100);

​

  for (let i=0; i<num; i++) {

    let x = map(i, 0.0, num, 10.0, width);

    let waveHeight = map(mouseY, 0.0, height, -height/2.0, height/2.0);

    let delay = map(i, 0.0, num, -1.0, 1.0);

    let delay2 = 0;

    for (let j = 0; j< num; j++) {

        let y = map(j, 0.0, num, 10.0, height);

      if (isAlternate) {

        delay2 = delay + map(j, 0.0, num, -1.0, 1.0);

      } else {

         delay2 = map(i, 0.0, num, -1.0, 1.0);

      }

      ellipse(x, y + waveHeight * sin(delay2 + frameCount*0.015), size, size);

    }

  }

}

​

function keyPressed() {

  if (key == '+') {

    size++;

  }

  if (key == '-') {

    if (size > 1) {

        size--;

    }

  }

​

  if(key == 'a'){

    isAlternate = !isAlternate;

  }

}