@smoud/tiny/examples/jsm/particles/MoneyFalling.js

Fast and tiny JavaScript library for HTML5 game and playable ads creation.

var random = Math.random,
    cos = Math.cos,
    sin = Math.sin;

export default class MoneyFallingParticle extends Tiny.Particle {
    constructor(emitter) {
        super(emitter);
    }

    onEmit() {
        this.tilt = Math.floor(random() * 10) - 10;
        this.tiltAngleIncremental = random() * 0.25 + 0.15 - 0.2;
        this.tiltAngle = 0;
        this.scale.set((random() * 0.4 + 0.6) / 2);
        this.angle = random() * 6.28;

        this.speed = random() * 1 + 0.5;
    }

    update(time, delta) {
        delta = delta * 0.001;
        this.angle += delta;
        this.tiltAngle += this.tiltAngleIncremental;
        this.y += ((cos(this.angle + 3) + 3 + 2 / 2) / 2) * delta * 100 * this.speed;
        this.x += sin(this.angle) * delta * 100 * this.speed;
        this.rotation = sin(this.tiltAngle) * 0.5 * this.speed;
    }

    render(renderSession) {
        if (this.visible === false || this.alpha === 0) return;

        renderSession.context.setTransform(
            this.worldTransform.a * cos(this.tiltAngle),
            this.worldTransform.b,
            this.worldTransform.c,
            this.worldTransform.d,
            this.worldTransform.tx * renderSession.resolution,
            this.worldTransform.ty * renderSession.resolution
        );

        this.drawTexture(renderSession);
    }
}