pyscript/examples/mario/js/coin.js

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

    var Coin = (Mario.Coin = function (pos, sprite) {
        Mario.Entity.call(this, {
            pos: pos,
            sprite: sprite,
            hitbox: [0, 0, 16, 16],
        });
        this.idx = level.items.length;
    });

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

    Coin.prototype.isPlayerCollided = function () {
        //the first two elements of the hitbox array are an offset, so let's do this now.
        var hpos1 = [
            this.pos[0] + this.hitbox[0],
            this.pos[1] + this.hitbox[1],
        ];
        var hpos2 = [
            player.pos[0] + player.hitbox[0],
            player.pos[1] + player.hitbox[1],
        ];

        //if the hitboxes actually overlap
        if (
            !(
                hpos1[0] > hpos2[0] + player.hitbox[2] ||
                hpos1[0] + this.hitbox[2] < hpos2[0]
            )
        ) {
            if (
                !(
                    hpos1[1] > hpos2[1] + player.hitbox[3] ||
                    hpos1[1] + this.hitbox[3] < hpos2[1]
                )
            ) {
                this.collect();
            }
        }
    };

    Coin.prototype.render = function (ctx, vX, vY) {
        this.sprite.render(ctx, this.pos[0], this.pos[1], vX, vY);
    };

    //money is not affected by gravity, you see.
    Coin.prototype.update = function (dt) {
        this.sprite.update(dt);
    };
    Coin.prototype.checkCollisions = function () {
        this.isPlayerCollided();
    };

    Coin.prototype.collect = function () {
        sounds.coin.currentTime = 0.05;
        sounds.coin.play();
        player.coins += 1;
        delete level.items[this.idx];
    };
})();