pyscript/examples/mario/js/bcoin.js

(function () {
    if (typeof Mario === "undefined") window.Mario = {};

    var Bcoin = (Mario.Bcoin = function (pos) {
        Mario.Entity.call(this, {
            pos: pos,
            sprite: level.bcoinSprite(),
            hitbox: [0, 0, 16, 16],
        });
    });

    Mario.Util.inherits(Bcoin, Mario.Entity);

    //I'm not sure whether it makes sense to use an array for vel and acc here
    //in order to keep with convention, or to just use a single value, since
    //it's literally impossible for these to move left or right.
    Bcoin.prototype.spawn = function () {
        sounds.coin.currentTime = 0.05;
        sounds.coin.play();
        this.idx = level.items.length;
        level.items.push(this);
        this.active = true;
        this.vel = -12;
        this.targetpos = this.pos[1] - 32;
    };

    Bcoin.prototype.update = function (dt) {
        if (!this.active) return;

        if (this.vel > 0 && this.pos[1] >= this.targetpos) {
            player.coins += 1;
            //spawn a score thingy.
            delete level.items[this.idx];
        }

        this.acc = 0.75;
        this.vel += this.acc;
        this.pos[1] += this.vel;
        this.sprite.update(dt);
    };

    Bcoin.prototype.checkCollisions = function () {};
})();