* Sketch: DPMTexture_002

 * Parent Sketch: none

 * Type: static

 *

 * Summary : Repeating diagonal lines

 *

 * GIT:

 * Author: mark webster 2019

 * https://bitbucket.org/dpmanual/dpmanual.bitbucket.io/src/master/

 * https://designingprograms.bitbucket.io/

 */

​

​

let gridStep = 100; // gap between each

let lineLen = gridStep; // length of lines

let sw = 2;

let interval = 10;

let randSeed;

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

​

function setup() {

  createCanvas(500, 500);

  background(0);

  smooth();

  stroke(255);

  strokeCap(SQUARE);

  randSeed = random(1000);

}

​

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

function draw() {

  background(0);

  randomSeed(randSeed);

  strokeWeight(sw);

  for (let y=0; y<=height-30; y+=gridStep) {

    for (let x=0; x<=width-30; x+=gridStep) {

        form(x, y, lineLen, 0);

        form(x-10, y,lineLen, 1);

        form(x, y, lineLen, 2);

    }

  }

}

​

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

function form( _x,  _y,  _size,  _type) {

    stroke(random(255));

    push();

    translate(_x, _y);

    for(let i = 0; i < _size; i+=interval) {

        let j = _size-i;

        if(_type==0){

          line(i, 0, _size, j);

        }

          else if(_type==1){

          line(10, i, j+10, _size);

        }

          else if(_type==2){

          line(i, _size,_size, i);

        }

    }  

    pop();

  }

​

function keyPressed() {

    if(key === 'r') {randSeed = random(1000);}

    if(key === '+') {interval++;}

    if(key === '-') if(interval>5){interval--;}

    if(key === 'w') sw ++;

    if(key === 'x') if(sw>0){sw--;}

    if(key === 'l') {gridStep +=25; lineLen = gridStep;}

    if(key === 'm') if(gridStep>50){gridStep -=25; lineLen = gridStep;}

}