class Flower{
    
    constructor(x, y){
        this.pos = createVector(x, y);
        this.rotation = 0;
        this.rotateSpeed = random(PI / 1024, PI / 512) * random([-1, 1]);
        this.leafCount = 16;
        this.leafs = [];
        this.radius = random(20, 200);
    }

    update(){

        this.rotation += this.rotateSpeed;
        this.newLeaf = frameCount % 5 == 0;
        if (this.leafs.length < this.leafCount && this.newLeaf){
            this.leafs.push(new Leaf(this.radius));
            this.newLeaf = false;
        }
        for (let l of this.leafs){
            l.update();
        }
    }

    show(){

        push();
        translate(this.pos.x, this.pos.y);
        rotate(this.rotation);
        for (let i = 0; i < this.leafs.length; i++){
            let l = this.leafs[i];

            let angle = i / this.leafCount * TWO_PI;
            l.show(angle);
        }
        pop();
    }

}

class Leaf{

    constructor(radius){
        this.width = radius;
        this.alpha = 0;
    }

    update(){
        if (this.alpha < 0.6) this.alpha += 0.01;
    }

    show(angle){
        push();
        noStroke();
        rotate(angle);
        let hue = int(angle / TWO_PI * 360);
        let c = color('hsba(' + hue + ', 100%, 100%, ' + this.alpha + ')');
        fill(c);   
        beginShape();
        for (let x = 0; x < this.width; x++){
            vertex(x, sin(x * TWO_PI / (this.width * 2)) * this.width / 5);
        }
        for (let x = this.width; x >= 0; x--){
            vertex(x, sin(x * TWO_PI / (this.width * 2)) * -this.width / 5);
        }
        endShape();
        pop();
    }

}