pyscript/examples/mario/js/rubble.js

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

    //TODO: make each rubble an entity, use that render and write in Entity.update
    var Rubble = (Mario.Rubble = function () {
        this.sprites = [];
        this.poss = [];
        this.vels = [];
    });

    Rubble.prototype.spawn = function (pos) {
        this.idx = level.items.length;
        level.items.push(this);
        this.sprites[0] = level.rubbleSprite();
        this.sprites[1] = level.rubbleSprite();
        this.sprites[2] = level.rubbleSprite();
        this.sprites[3] = level.rubbleSprite();
        this.poss[0] = pos;
        this.poss[1] = [pos[0] + 8, pos[1]];
        this.poss[2] = [pos[0], pos[1] + 8];
        this.poss[3] = [pos[0] + 8, pos[1] + 8];
        this.vels[0] = [-1.25, -5];
        this.vels[1] = [1.25, -5];
        this.vels[2] = [-1.25, -3];
        this.vels[3] = [1.25, -3];
    };

    Rubble.prototype.update = function (dt) {
        for (var i = 0; i < 4; i++) {
            if (this.sprites[i] === undefined) continue;
            this.vels[i][1] += 0.3;
            this.poss[i][0] += this.vels[i][0];
            this.poss[i][1] += this.vels[i][1];
            this.sprites[i].update(dt);
            if (this.poss[i][1] > 256) {
                delete this.sprites[i];
            }
        }
        if (
            this.sprites.every(function (el) {
                return !el;
            })
        ) {
            delete level.items[this.idx];
        }
    };

    //You might argue that things that can't collide are more like scenery
    //but these move and need to be deleted, and i'd rather deal with the 1d array.
    Rubble.prototype.checkCollisions = function () {};

    Rubble.prototype.render = function () {
        for (var i = 0; i < 4; i++) {
            if (this.sprites[i] === undefined) continue;
            this.sprites[i].render(
                ctx,
                this.poss[i][0],
                this.poss[i][1],
                vX,
                vY,
            );
        }
    };
})();