* Sketch: DPMArc_001

 * Parent Sketch: none

 * Type: dynamic

 *

 * Summary : Repeating Arcs 

 *

 * GIT:

 * Author: Ferdinand Sorg

 * https://openrndr.org/

 * https://dpmanual.bitbucket.io

 * https://designingprograms.bitbucket.io

 */

​

let sw = 5;

​

function setup() {

  createCanvas(500, 500);

  noFill();

  stroke(255);

}

​

function draw() {

    background(0);

    strokeWeight(sw);

    let num = map(mouseY, 0, height, 75, 1);

    drawForm(width/2, height/2, num);

}

​

/////////////////////////// FUNCTIONS ////////////////////////////

function drawForm( _x,  _y,  _num) {

    push();

    translate(_x, _y);

    let d = mouseX/2;

    line(0,-height,0,height);

    for (let i = 0; i< width; i+=_num) {

      arc(0, 0,  d-i, height, 0, TWO_PI);

    }

    pop();

  }

​

function keyPressed() {

    if(key == '+') sw++;

    if(key == '-') {

      if(sw>0)

      sw--;

    }

​

}