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import * as state from '/static/games/stallman-shooter/state.js';
import * as constants from '/static/games/stallman-shooter/constants.js';
let events = [];
window.addEventListener('keydown', (e) => events.push(['keydown', e.key]));
window.addEventListener('keyup', (e) => events.push(['keyup', e.key]));
const duration = 1000 / 60;
function frame(ctx, st, events, textures) {
const new_bullets = [];
const count = st.count;
for (const enemy of st.enemies) {
new_bullets.push(...enemy.act(count));
}
for (const bullet of st.bullets) {
state.straight_bullet_act(bullet);
}
for (const bullet of st.player_bullets) {
state.straight_bullet_act(bullet);
}
st.player.act(events);
if (count % st.player.fire_rate === 0) {
st.player_bullets.push(new state.PBullet(st.player.x, 0, st.player.y, -3.5));
}
for (const bullet of st.bullets) {
if (state.overlaps(st.player, bullet)) {
return 'loss';
}
}
for (const bullet of new_bullets) {
if (state.overlaps(st.player, bullet)) {
return 'loss';
}
}
for (const enemy of st.enemies) {
for (const bullet of st.player_bullets) {
if (state.overlaps(enemy, bullet)) {
enemy.injure(bullet.damage());
state.straight_bullet_delete(bullet);
}
}
}
st.enemies = st.enemies.filter((enemy) => enemy.health > 0);
if (st.enemies.length === 0) {
return 'win';
}
st.bullets = st.bullets.filter((bullet) => !state.outside(bullet));
st.bullets.push(...new_bullets);
st.player_bullets = st.player_bullets.filter((bullet) => !state.outside(bullet));
for (const bullet of st.player_bullets) {
state.draw(bullet, ctx, textures.pbullet);
}
for (const enemy of st.enemies) {
state.draw(enemy, ctx, textures.enemy);
}
state.draw(st.player, ctx, textures.player);
for (const bullet of st.bullets) {
state.draw(bullet, ctx, textures.ebullet);
}
ctx.strokeStyle = "red";
ctx.strokeRect(0, 0, Math.round(st.enemies[0].health * constants.x_dim), 20);
st.count++;
return 'nothing';
}
async function get_bitmap(id) {
const image = document.getElementById(id);
await image.decode();
return await window.createImageBitmap(image);
}
async function get_player_bitmap() {
return get_bitmap('stallman');
}
async function get_enemy_bitmap() {
return get_bitmap('gates');
}
async function get_ebullet_bitmap() {
return get_bitmap('binary-blob');
}
async function get_pbullet_surface() {
return get_bitmap('player-pepp');
}
async function generic_message(ctx, image, okay) {
const bitmap = await get_bitmap(image);
while (true) {
await new Promise(window.requestAnimationFrame);
const ev = events;
events = [];
for (const event of ev) {
const [type, keycode] = event;
if (type === 'keydown' && keycode === okay) {
return;
}
}
ctx.drawImage(bitmap, 0, 0);
}
}
async function introduction(ctx) {
await generic_message(ctx, 'introduction', 'Enter');
}
async function loss(ctx) {
await generic_message(ctx, 'loss', 'r');
}
async function victory(ctx) {
await generic_message(ctx, 'victory', 'r');
}
async function main() {
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
await introduction(ctx);
while (true) {
const st = new state.State();
const [
player_bitmap,
enemy_bitmap,
ebullet_bitmap,
pbullet_bitmap,
] = await Promise.all([
get_bitmap('stallman'),
get_bitmap('gates'),
get_bitmap('binary-blob'),
get_bitmap('player-pepp'),
]);
const textures = {
player: player_bitmap,
enemy: enemy_bitmap,
ebullet: ebullet_bitmap,
pbullet: pbullet_bitmap,
};
let last_frame_time = null;
let accumulator = 0;
game: while (true) {
const now = await new Promise(requestAnimationFrame);
if (last_frame_time !== null) {
accumulator += now - last_frame_time;
}
last_frame_time = now;
while (accumulator >= duration) {
accumulator -= duration;
ctx.fillStyle = "white";
ctx.fillRect(0, 0, constants.x_dim, constants.y_dim);
const result = frame(ctx, st, events, textures);
events = [];
if (result === 'loss') {
await loss(ctx);
break game;
}
if (result === 'win') {
await victory(ctx);
break game;
}
}
}
}
}
main()
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