brush-leaf

​

let prevPos;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(255);

  prevPos = createVector(1,1);

}

​

​

function pickColor(){

  let palete = [

      color(56, 58, 37, 20),

      color(109, 112, 46, 20),

      color(153, 152, 100, 20),

      color(115, 134, 107, 20),

      color(87, 106, 100, 20)   

  ];

  let idx = int(random(palete.length));

  return palete[idx]

}

​

function draw() {

  // background(255);

​

  let pos = createVector(mouseX,mouseY);

​

  if (mouseIsPressed) {

      let angle = random(-PI,PI);

      fill(pickColor());

      stroke(pickColor());

      let leaf = new Leaf(mouseX, 

                          mouseY, 

                          random(10,100), 

                          random(20,60),

                          angle

                         );

      // leafs.push(leaf);

      leaf.draw();

    }

​

}

​

function Leaf(x,y,l,w,a){

  this.x = x;

  this.y = y;

  this.l = l;

  this.w = w;

  this.a = a;

  this.formHeights = [0, .01, .07, .12, .2, .25, .32, .35, .35, .3, .2, .1];

  this.leftSideAng = this.a - HALF_PI;

  this.rightSideAng = this.a + HALF_PI;

  this.leftVectors = [];

  this.rightVectors = [];

  this.tipPos = createVector(this.l * cos(this.a - HALF_PI), -this.l * sin(this.a + HALF_PI)); 

​

  let normVect = this.tipPos.copy().normalize();

  let rightVect = normVect.copy().rotate(-HALF_PI);

  let leftVect = normVect.copy().rotate(HALF_PI);

  this.formHeights.forEach(h => {

    this.leftVectors.push(p5.Vector.mult(leftVect, h*this.w) );

    this.rightVectors.push(p5.Vector.mult(rightVect, h*this.w) );

  });

​

  this.stepVector = p5.Vector.div(this.tipPos,this.formHeights.length);

​

  this.draw = function(){

    translate(this.x,this.y);

    beginShape();   

    for (let n1 = 0; n1 < this.formHeights.length; n1++ ){

      let v1 = p5.Vector.mult(this.stepVector,n1);

      vertex(v1.x, v1.y); 

      v1.add(this.leftVectors[n1]);

      for (let n2 = 0; n2 < this.formHeights.length; n2++ ){

        let v2 = p5.Vector.mult(this.stepVector,n2);

        vertex(v2.x, v2.y);

        vertex(v1.x, v1.y);

      }

    }   

    for (let n1 = 0; n1 < this.formHeights.length; n1++ ){

      let v1 = p5.Vector.mult(this.stepVector,n1);

      vertex(v1.x, v1.y); 

      v1.add(this.rightVectors[n1]);

      for (let n2 = 0; n2 < this.formHeights.length; n2++ ){

        let v2 = p5.Vector.mult(this.stepVector,n2);

        vertex(v2.x, v2.y);

        vertex(v1.x, v1.y);

      }

    }   

    endShape();

  }

}