//topic: week 1 demo customized brush

​

let xPos,yPos,dia;

let R,G,B,A=150;

let brush1 = true;

let brush2 = true;

//setup only run once

function setup(){

  createCanvas(windowWidth,windowHeight);

  //background is to change the background color

  background(240);

}

//draw loops forever

function draw(){

  xPos = mouseX;

  yPos = mouseY;

  // dia = 80;

  noStroke();

  R = 0;

  G = 0;

  B = 0;

  A = map(mouseX,0,width,0,255);

  fill(R,G,B,A);

  if(brush1){

  dia = map(mouseY, 0,height,0,50);

  circle(xPos,yPos,dia);

  }

  if(brush2){

  fill(R,G,B,A);

  //stroke('black');

  dia = map(mouseX,0,width,0,30);

  circle(xPos,yPos,dia);

  }

}

​

function keyTyped(){

  if(key ==='1'){

    brush1 = !brush1;

  }

  if(key ==='2'){

    brush2 =!brush2;

  }

​

}