yushano_Project 11

sketch

function turtleLeft(d) {
    this.angle -= d;
}


function turtleRight(d) {
    this.angle += d;
}


function turtleForward(p) {
    var rad = radians(this.angle);
    var newx = this.x + cos(rad) * p;
    var newy = this.y + sin(rad) * p;
    this.goto(newx, newy);
}


function turtleBack(p) {
    this.forward(-p);
}


function turtlePenDown() {
    this.penIsDown = true;
}


function turtlePenUp() {
    this.penIsDown = false;
}


function turtleGoTo(x, y) {
    if (this.penIsDown) {
      stroke(this.color);
      strokeWeight(this.weight);
      line(this.x, this.y, x, y);
    }
    this.x = x;
    this.y = y;
}


function turtleSetColor(c) {
    this.color = c;
}


function turtleSetWeight(w) {
    this.weight = w;
}

function turtleFace(angle) {
    this.angle = angle;
}

function makeTurtle(tx, ty) {
    var turtle = {x: tx, y: ty,
                  angle: 0.0, 
                  penIsDown: true,
                  color: color(random(255),random(255),0),
                  weight: 1,
                  left: turtleLeft, right: turtleRight,
                  forward: turtleForward, back: turtleBack,
                  penDown: turtlePenDown, penUp: turtlePenUp,
                  goto: turtleGoTo, 
                  setColor: turtleSetColor, setWeight: turtleSetWeight,
                  face: turtleFace};
    return turtle;
}

function setup() {
    createCanvas(480, 480);
    background(0);

}

var turtleX = [];
var turtleY = [];
var radius = 5;

function draw() {
  for (var num=0; num<turtleX.length; num++){
    var turtle = makeTurtle(turtleX[num], turtleY[num]);
    var angle=20;
    
    for (var i=0; i<20; i++) {
        turtle.penDown();
        turtle.right(angle);
        turtle.forward(radius);
      
      turtle.penUp();
      turtle.x = turtleX[num];
      turtle.y = turtleY[num];
    }
  }
  if(radius<200){
    radius += 0.5;
  }
}

function mousePressed(){
  
  turtleX.push(random(width));
  turtleY.push(random(height));

}

When users press the mouse on the canvas, there will be a turtle that is placed randomly on canvas generated. The size of each firework is also changing. This idea is inspired by the firework that we can see on celebration days.