Fries
63bb2916ca
this means i can try out making a launcher that launches into other javascript engines like quickjs.
141 lines
3.6 KiB
JavaScript
141 lines
3.6 KiB
JavaScript
const PAD_BUTTON_START = 0x1000;
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const PAD_BUTTON_A = 0x0100;
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const RED_COLOR = wii.rgba(255, 0, 0, 255);
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const GREEN_COLOR = wii.rgba(0, 255, 0, 255);
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const WHITE_COLOR = wii.rgba(255, 255, 255, 255);
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const FALLING_SPEED = 250;
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const TERMINAL_VELOCITY_SPEED = 500;
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const PIPE_SPAWN_TIME = 4;
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const PIPE_MAX_TIME = 5;
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/**
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* throws if input is nullish.
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* @template T
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* @param {T | null | undefined} value
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* @returns {T}
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*/
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function nonNull(value) {
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if (value == null) {
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throw new Error("unexpected " + (value === null ? 'null' : 'undefined'))
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}
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return value
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}
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/**
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* clamps a number to the min and max values.
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* @param {number} num
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* @param {number} min
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* @param {number} max
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* @returns a clamped number
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*/
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function clamp(num, min, max) {
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return Math.min(Math.max(num, min), max);
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}
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/**
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* picks a random number between the min and max values.
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* @param {number} min
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* @param {number} max
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* @returns a random number
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*/
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function random_range(min, max) {
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const minCeiled = Math.ceil(min);
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const maxFloored = Math.floor(max);
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return Math.floor(Math.random() * (maxFloored - minCeiled) + minCeiled);
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}
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/** @type {GRRLibTexture | null} */
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globalThis.background = null;
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/** @type {{velocity: number, position: number, texture?: GRRLibTexture}} */
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globalThis.bird = {
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velocity: 0,
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position: 0
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};
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/** @type {GRRLibTexture | null} */
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globalThis.pipe = null;
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/** @type {GRRLibTexture | null} */
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globalThis.pipe_flipped = null;
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/** @type {Pipe[]} */
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globalThis.pipes = [];
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/** @type {number} */
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globalThis.timer = 0;
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function start() {
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const background = wii.get_file("background-day.png");
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const bird = wii.get_file("yellowbird-midflap.png");
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const pipe = wii.get_file("pipe-green.png");
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const pipe_flipped = wii.get_file("pipe-green-flipped.png");
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globalThis.background = wii.grrlib.load_texture(background);
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globalThis.bird.texture = wii.grrlib.load_texture(bird);
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globalThis.pipe = wii.grrlib.load_texture(pipe);
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globalThis.pipe_flipped = wii.grrlib.load_texture(pipe_flipped);
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}
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function update_bird() {
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const deltatime = wii.get_deltatime();
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bird.position -= bird.velocity * deltatime;
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bird.velocity = clamp(bird.velocity - (FALLING_SPEED * deltatime), -TERMINAL_VELOCITY_SPEED, TERMINAL_VELOCITY_SPEED);
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wii.grrlib.draw_img(0, bird.position, nonNull(bird.texture), 0, 1, 1, WHITE_COLOR);
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}
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function Pipe() {
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const top_max = 200;
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const top_y = random_range(0, top_max);
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wii.grrlib.draw_img(100, -top_y, nonNull(pipe_flipped), 0, 1, 1, WHITE_COLOR);
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wii.grrlib.draw_img(100, top_y + 400, nonNull(pipe), 0, 1, 1, WHITE_COLOR);
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this.top_y = -top_y
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this.bottom_y = -top_y + 400
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this.position = 650
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this.time_active = 0
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}
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Pipe.prototype.update = function () {
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if (this.time_active >= PIPE_MAX_TIME) {
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const index = pipes.indexOf(this);
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pipes.splice(index, -1);
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return;
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}
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wii.grrlib.draw_img(this.position, this.top_y, nonNull(pipe_flipped), 0, 1, 1, WHITE_COLOR);
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wii.grrlib.draw_img(this.position, this.bottom_y, nonNull(pipe), 0, 1, 1, WHITE_COLOR);
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this.position -= 100 * wii.get_deltatime();
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this.time_active += wii.get_deltatime();
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}
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function update() {
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const pressed = wii.pad.buttons_down();
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if (pressed & PAD_BUTTON_START) {
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wii.print("exiting from js");
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wii.exit();
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}
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if (pressed & PAD_BUTTON_A) {
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bird.velocity = FALLING_SPEED;
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}
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if (timer >= PIPE_SPAWN_TIME) {
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globalThis.timer = 0;
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}
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if (timer == 0) {
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pipes.push(new Pipe());
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}
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wii.grrlib.draw_img(0, 0, nonNull(background), 0, 1, 1, WHITE_COLOR);
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update_bird();
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for (var i = 0; i < pipes.length; i++) {
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pipes[i].update();
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}
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wii.print("deltatime: " + wii.get_deltatime())
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globalThis.timer += wii.get_deltatime();
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}
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