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MeatSlicer/js/rooms.js
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JavaScript
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// ---- floor generation, room state, doors, hazards ----
const DIRS = { n: [0, -1], s: [0, 1], e: [1, 0], w: [-1, 0] };
const OPP = { n: 's', s: 'n', e: 'w', w: 'e' };
const ROOM_SHAPES = {
hall: { x0: 48, y0: 48, x1: 912, y1: 592 },
wide_hall: { x0: 48, y0: 208, x1: 912, y1: 432 },
tall_hall: { x0: 368, y0: 48, x1: 592, y1: 592 },
chamber: { x0: 208, y0: 128, x1: 752, y1: 512 },
pit: { x0: 128, y0: 88, x1: 832, y1: 552 },
};
const ROOM_THEMES = {
abattoir: { floor: ['tile_floor1', 'tile_floor1', 'tile_floor4', 'tile_floor6'], wall: ['tile_wall', 'tile_wall2'] },
plant: { floor: ['tile_floor2', 'tile_floor5', 'tile_floor7'], wall: ['tile_wall', 'tile_wall4'] },
oxide: { floor: ['tile_floor3', 'tile_floor3', 'tile_floor6'], wall: ['tile_wall3', 'tile_wall'] },
flesh: { floor: ['tile_floor8', 'tile_floor8', 'tile_floor1'], wall: ['tile_wall4', 'tile_wall2'] },
};
function roomBounds(room) {
const def = ROOM_SHAPES[(room && room.shape) || 'hall'] || ROOM_SHAPES.hall;
return { x0: def.x0, y0: def.y0, x1: def.x1, y1: def.y1,
cx: (def.x0 + def.x1) / 2, cy: (def.y0 + def.y1) / 2,
w: def.x1 - def.x0, h: def.y1 - def.y0 };
}
function setArenaForRoom(room) { G.arena = roomBounds(room); }
function genFloor(floor) {
G.rooms = {};
const target = Math.min(5 + floor, 9);
G.rooms['0,0'] = makeRoom(0, 0, 'start');
let cx = 0, cy = 0, guard = 0;
while (Object.keys(G.rooms).length < target && guard++ < 500) {
const [dx, dy] = choice(Object.values(DIRS));
const nx = cx + dx, ny = cy + dy;
if (!G.rooms[nx + ',' + ny]) {
G.rooms[nx + ',' + ny] = makeRoom(nx, ny, 'combat');
if (chance(0.5)) { cx = nx; cy = ny; }
} else { cx = nx; cy = ny; }
}
// assign boss (farthest) and item (second farthest, dist >= 2)
const list = Object.values(G.rooms).sort((a, b) =>
(Math.abs(b.gx) + Math.abs(b.gy)) - (Math.abs(a.gx) + Math.abs(a.gy)));
list[0].type = 'boss';
for (const r of list) {
const d = Math.abs(r.gx) + Math.abs(r.gy);
if (r.type === 'combat' && d >= 2) { r.type = 'item'; break; }
}
const combatShapes = ['hall', 'hall', 'hall', 'pit', 'chamber', 'wide_hall', 'tall_hall'];
const themes = Object.keys(ROOM_THEMES);
for (const r of Object.values(G.rooms)) {
r.theme = choice(themes);
if (r.type === 'start' || r.type === 'boss') r.shape = 'hall';
else if (r.type === 'item') r.shape = 'chamber';
else r.shape = choice(combatShapes);
for (const [dir, [dx, dy]] of Object.entries(DIRS)) {
r.doors[dir] = !!G.rooms[(r.gx + dx) + ',' + (r.gy + dy)];
}
}
}
function makeRoom(gx, gy, type) {
return { gx, gy, type, shape: 'hall', theme: 'abattoir', doors: {}, cleared: type === 'start',
visited: false, decals: [], wavesLeft: 0, spawnT: 0, bossSpawned: false, pickups: [] };
}
function roomKey(x, y) { return x + ',' + y; }
function wavesFor(floor) {
const base = 3 + Math.ceil(floor * 1.4);
const waves = [base];
if (floor >= 2) waves.push(Math.ceil(base * 0.7));
if (floor >= 4) waves.push(Math.ceil(base * 0.5));
return waves;
}
function enterRoom(gx, gy) {
// stash the old room's pickups (stairs, pedestals, rewards, gems all persist)
if (G.cur) G.cur.pickups = G.pickups;
G.enemies = [];
G.ebullets = [];
G.bullets = [];
G.hazards = [];
G.telegraphs = [];
G.corpses = [];
G.boss = null;
G.roomLayer = null;
G.roomLayerKey = '';
G.roomDamaged = false;
G.roomEnterT = G.time;
const room = G.rooms[roomKey(gx, gy)];
G.cur = room;
setArenaForRoom(room);
G.pickups = room.pickups;
const a = G.arena;
// spawn protection: brief invincibility walking into a fresh room
if (G.player) {
G.player.invT = Math.max(G.player.invT, 1.0);
G.player.x = clamp(G.player.x, a.x0 + G.player.r, a.x1 - G.player.r);
G.player.y = clamp(G.player.y, a.y0 + G.player.r, a.y1 - G.player.r);
}
// Iron Lung: re-arm the once-per-room hit block
if (G.player && G.player.stats.ironLung > 0) G.player.ironLungReady = true;
if (!room.visited) {
room.visited = true;
if (room.type === 'combat') {
const w = wavesFor(G.floor);
room.wavesLeft = w.length;
room.pendingWave = w;
spawnWave(w[0], G.floor);
room.wavesLeft--;
room.spawnT = 0;
} else if (room.type === 'boss') {
const boss = spawnBoss(G.floor);
room.bossSpawned = true;
// boss fights are a pure ammo drain, so stock the room on the way in
spawnPickup('ammo', a.cx, a.cy + 140);
Music.playBoss(boss.bossKind);
} else if (room.type === 'item') {
spawnItemPedestal(a.cx - 45, a.cy, null, 'room');
// item rooms sometimes also stock a weapon
if (chance(0.35)) {
const w = rollWeaponDrop(G.floor);
spawnPickup('weapon', a.cx + 55, a.cy, { wid: w.id });
}
// and occasionally a bonus active pedestal
if (chance(0.15)) spawnActivePedestal(a.cx + 130, a.cy + 55);
room.cleared = true;
}
} else if (room.type === 'combat' && !room.cleared && room.wavesLeft > 0) {
// re-entering an uncleared room: restart waves
spawnWave(room.pendingWave[room.pendingWave.length - room.wavesLeft], G.floor);
room.wavesLeft--;
room.spawnT = 0;
}
}
function roomLocked() {
const r = G.cur;
if (!r) return false;
if (r.type !== 'combat' && r.type !== 'boss') return false;
return !r.cleared;
}
function updateRoom(dt) {
const r = G.cur;
const p = G.player;
const a = G.arena;
// If the current pressure is clearly overwhelming the build, ease it down
// smoothly. Spawn-time application means living enemies never jump stats.
if (G.enemies.length > 0) {
const lowHealth = p.hp / Math.max(1, p.stats.maxHp) < 0.35;
const stalled = G.time - G.roomEnterT > 90;
if (lowHealth || stalled) {
const decay = lowHealth ? 0.02 : 0.008;
applyPressureDelta(-decay * dt * pressureDropScale());
}
}
G.recentHits = (G.recentHits || []).filter(t => G.time - t < 12);
// wave progression / room clear
if (r.type === 'combat' && !r.cleared) {
if (G.enemies.length === 0) {
if (r.wavesLeft > 0) {
r.spawnT += dt;
if (r.spawnT > 0.9) {
r.spawnT = 0;
spawnWave(r.pendingWave[r.pendingWave.length - r.wavesLeft], G.floor);
r.wavesLeft--;
}
} else {
r.cleared = true;
recordRoomClear(r);
spawnRoomReward(a.cx, a.cy, G.floor);
Sfx.roomClear();
addScore(50);
}
}
} else if (r.type === 'boss' && r.bossSpawned && !r.cleared) {
if (!G.boss && G.enemies.length === 0) {
r.cleared = true;
recordRoomClear(r);
Sfx.roomClear();
}
}
// door transitions
if (!roomLocked()) {
let dir = null;
if (p.y < a.y0 + p.r + 6 && Math.abs(p.x - a.cx) < DOOR_HALF && keyDown('w', 'arrowup')) dir = 'n';
else if (p.y > a.y1 - p.r - 6 && Math.abs(p.x - a.cx) < DOOR_HALF && keyDown('s', 'arrowdown')) dir = 's';
else if (p.x > a.x1 - p.r - 6 && Math.abs(p.y - a.cy) < DOOR_HALF && keyDown('d', 'arrowright')) dir = 'e';
else if (p.x < a.x0 + p.r + 6 && Math.abs(p.y - a.cy) < DOOR_HALF && keyDown('a', 'arrowleft')) dir = 'w';
if (dir && r.doors[dir]) {
const [dx, dy] = DIRS[dir];
enterRoom(r.gx + dx, r.gy + dy);
const next = G.arena;
// place player at the opposite door in the destination's own shape
if (dir === 'n') p.y = next.y1 - p.r - 8;
if (dir === 's') p.y = next.y0 + p.r + 8;
if (dir === 'e') p.x = next.x0 + p.r + 8;
if (dir === 'w') p.x = next.x1 - p.r - 8;
p.x = clamp(p.x, next.x0 + p.r, next.x1 - p.r);
p.y = clamp(p.y, next.y0 + p.r, next.y1 - p.r);
G.transition = 0.3;
Sfx.door();
}
}
}
function recordRoomClear(room) {
if (!G.roomDamaged) {
G.streak++;
applyPressureDelta(pressureGain());
} else {
G.streak = 0;
}
// active items charge on room clears: +1 per combat room, +2 per boss
const p = G.player;
if (p && p.active) {
const a = ACTIVES[p.active.iid];
if (a) {
const gain = room.type === 'boss' ? 2 : (room.type === 'combat' ? 1 : 0);
if (gain > 0 && p.active.charges < a.cost) {
p.active.charges = Math.min(a.cost, p.active.charges + gain);
if (p.active.charges >= a.cost) spawnText(p.x, p.y - 30, a.name.toUpperCase() + ' READY', '#e2472f');
}
}
}
if (room.type === 'combat' && G.player.stats.roomHeal > 0 && G.player.hp < G.player.stats.maxHp) {
const before = G.player.hp;
healPlayer(G.player.stats.roomHeal);
if (G.player.hp > before) spawnText(G.player.x, G.player.y - 18, 'ROOM KNIT +' + (G.player.hp - before), '#d98991');
}
// Bone Knit perk: small chance of a half-heart mend on each combat clear
if (room.type === 'combat' && G.player.stats.roomHealChance > 0 && G.player.hp < G.player.stats.maxHp &&
chance(Math.min(0.9, G.player.stats.roomHealChance))) {
const before = G.player.hp;
healPlayer(1);
if (G.player.hp > before) spawnText(G.player.x, G.player.y - 30, 'BONE KNIT +' + (G.player.hp - before), '#d98991');
}
}
function nextFloor() {
G.floor++;
addScore(250);
Sfx.stairs();
genFloor(G.floor);
enterRoom(0, 0);
// Shield Heart perk: fresh shield hearts each floor
G.player.shieldHp = G.player.stats.shieldPerk || 0;
if (G.player.shieldHp > 0) { spawnText(G.player.x, G.player.y - 20, 'SHIELD UP', '#3bc9e0'); Sfx.shieldUp(); }
// legendary once-per-floor flags reset
G.player.secondSkinUsed = false;
G.player.lastCutActive = false;
G.player.x = W / 2; G.player.y = H / 2;
addToast('FLOOR ' + G.floor, 'the meat runs deeper here');
Music.requestFloorMusic();
G.transition = 0.5;
}
// ---- hazards (acid pools, fire, bear traps) ----
function updateHazards(dt) {
const p = G.player;
for (let i = G.hazards.length - 1; i >= 0; i--) {
const h = G.hazards[i];
h.t += dt;
if (h.t >= h.life) { G.hazards.splice(i, 1); continue; }
if (h.hostile) {
h.tick = (h.tick || 0) - dt;
if (h.tick <= 0 && dist2(h.x, h.y, p.x, p.y) < (h.r + p.r) * (h.r + p.r)) {
h.tick = h.tickRate || 0.4;
hurtPlayer(h.dmg || 1, angleTo(h.x, h.y, p.x, p.y));
}
}
if (h.kind === 'trap') {
for (const e of G.enemies) {
if (e.boss || e.hp <= 0) continue;
if (h.caught && h.caught.has(e)) continue; // each victim springs it once
if (dist2(h.x, h.y, e.x, e.y) < (h.r + e.r) * (h.r + e.r)) {
e.rootT = 2.2;
damageEnemy(e, h.dmg, rand(0, TAU), false);
spawnBlood(e.x, e.y, 0, 6);
Sfx.trapSnap({ x: h.x, y: h.y });
// a trap snaps shut on a few victims before it breaks
if (!h.caught) h.caught = new Set();
h.caught.add(e);
h.charges = (h.charges === undefined ? 1 : h.charges) - 1;
if (h.charges <= 0) { G.hazards.splice(i, 1); break; }
}
}
} else if (!h.hostile || h.dps > 0) { // weapon pools hurt enemies; zero-DPS boss pools do not
for (const e of G.enemies) {
if (e.hp <= 0) continue;
if (e === h.owner) continue;
if (dist2(h.x, h.y, e.x, e.y) < (h.r + e.r * 0.5) * (h.r + e.r * 0.5)) {
if (h.kind === 'acid') { e.slowT = 0.4; tickEnemyDamage(e, h.dps * dt); }
else { e.burnT = Math.max(e.burnT, 0.8); e.burnDps = h.dps; }
}
}
}
}
}
// ---- rendering ----
function hashTile(x, y) { return ((x * 73856093) ^ (y * 19349663)) >>> 0; }
const FLOOR_TILE_POOL = [
'tile_floor1', 'tile_floor1', 'tile_floor1',
'tile_floor2', 'tile_floor2', 'tile_floor2',
'tile_floor3', 'tile_floor3',
'tile_floor4', 'tile_floor6', 'tile_floor6', 'tile_floor6',
'tile_floor5', 'tile_floor7', 'tile_floor8', 'tile_floor1',
];
const WALL_TILE_POOL = ['tile_wall', 'tile_wall', 'tile_wall2', 'tile_wall3', 'tile_wall4'];
function drawFloorTiles(target, r) {
const a = roomBounds(r);
const theme = ROOM_THEMES[r.theme] || ROOM_THEMES.abattoir;
target.fillStyle = '#050204';
target.fillRect(0, 0, W, H);
target.save();
target.beginPath(); target.rect(a.x0, a.y0, a.w, a.h); target.clip();
const tx0 = Math.floor(a.x0 / TILE), tx1 = Math.ceil(a.x1 / TILE);
const ty0 = Math.floor(a.y0 / TILE), ty1 = Math.ceil(a.y1 / TILE);
for (let ty = ty0; ty < ty1; ty++) {
for (let tx = tx0; tx < tx1; tx++) {
const h = hashTile(tx + r.gx * 31, ty + r.gy * 31);
const sprite = theme.floor[h % theme.floor.length];
Sprites.draw(target, sprite, tx * TILE + TILE / 2, ty * TILE + TILE / 2, 0, TILE);
}
}
target.restore();
}
function drawFloor(ctx, r) {
// A room's 600 floor tiles are static. Cache them into one bitmap in the
// browser; headless tests keep the simple direct path.
const canCache = typeof document !== 'undefined' && document.createElement && G.imagesLoaded;
if (!canCache) { drawFloorTiles(ctx, r); return; }
const key = r.gx + ',' + r.gy + ':' + G.floor + ':' + r.shape + ':' + r.theme;
if (!G.roomLayer || G.roomLayerKey !== key) {
const layer = document.createElement('canvas');
layer.width = W; layer.height = H;
const lctx = layer.getContext('2d');
lctx.imageSmoothingEnabled = false;
drawFloorTiles(lctx, r);
G.roomLayer = layer; G.roomLayerKey = key;
}
ctx.drawImage(G.roomLayer, 0, 0);
}
function drawRoom(ctx) {
const r = G.cur;
drawFloor(ctx, r);
// blood decals
for (const d of r.decals) {
Sprites.draw(ctx, d.img, d.x, d.y, d.rot, 48 * d.s, false, 0.55);
}
// hazards
for (const h of G.hazards) {
const k = 1 - h.t / h.life;
if (h.kind === 'trap') {
Sprites.draw(ctx, 'bullet_saw', h.x, h.y, h.t * 0.5, 28, false, clamp(k * 3, 0, 1));
} else {
ctx.globalAlpha = clamp(k * 2, 0, 0.55);
const pulse = h.r * (0.82 + Math.sin(h.t * 5) * 0.08);
ctx.fillStyle = h.hostile ? (h.kind === 'acid' ? '#a7c92b' : '#ff642b') : (h.kind === 'acid' ? '#4f9e25' : '#d65b18');
ctx.beginPath(); ctx.arc(h.x, h.y, pulse, 0, TAU); ctx.fill();
ctx.strokeStyle = h.hostile ? '#fff0a0' : (h.kind === 'acid' ? '#a5e34c' : '#ffb13b');
ctx.lineWidth = 2;
ctx.beginPath(); ctx.arc(h.x, h.y, pulse * 0.72, 0, TAU); ctx.stroke();
ctx.globalAlpha = 1;
}
}
// walls
drawWalls(ctx, r);
}
function drawWalls(ctx, r) {
const locked = roomLocked();
const a = roomBounds(r);
const theme = ROOM_THEMES[r.theme] || ROOM_THEMES.abattoir;
const wallPool = theme.wall;
const left = a.x0 - WALL, right = a.x1 + WALL;
const top = a.y0 - WALL, bottom = a.y1 + WALL;
function clipBand(dir) {
ctx.beginPath();
if (dir === 'n' || dir === 's') {
const y = dir === 'n' ? top : a.y1;
if (r.doors[dir]) {
ctx.rect(left, y, a.cx - DOOR_HALF - left, WALL);
ctx.rect(a.cx + DOOR_HALF, y, right - a.cx - DOOR_HALF, WALL);
} else ctx.rect(left, y, right - left, WALL);
} else {
const x = dir === 'w' ? left : a.x1;
if (r.doors[dir]) {
ctx.rect(x, top, WALL, a.cy - DOOR_HALF - top);
ctx.rect(x, a.cy + DOOR_HALF, WALL, bottom - a.cy - DOOR_HALF);
} else ctx.rect(x, top, WALL, bottom - top);
}
ctx.clip();
}
for (const dir of ['n', 's']) {
ctx.save(); clipBand(dir);
const y = dir === 'n' ? top + TILE / 2 : a.y1 + TILE / 2;
for (let x = left; x < right; x += TILE) {
const h = hashTile(Math.floor(x / TILE) + r.gx * 17, (dir === 'n' ? -1 : 11) + r.gy * 19);
Sprites.draw(ctx, wallPool[h % wallPool.length], x + TILE / 2, y, 0, TILE);
}
ctx.restore();
}
for (const dir of ['w', 'e']) {
ctx.save(); clipBand(dir);
const x = dir === 'w' ? left + TILE / 2 : a.x1 + TILE / 2;
for (let y = top; y < bottom; y += TILE) {
const h = hashTile((dir === 'w' ? -1 : 16) + r.gx * 17, Math.floor(y / TILE) + r.gy * 19);
Sprites.draw(ctx, wallPool[h % wallPool.length], x, y + TILE / 2, Math.PI / 2, TILE);
}
ctx.restore();
}
ctx.strokeStyle = 'rgba(0,0,0,0.5)'; ctx.lineWidth = 3;
ctx.strokeRect(a.x0, a.y0, a.w, a.h);
for (const [dir, has] of Object.entries(r.doors)) {
if (!has) continue;
const sprite = locked ? 'door_locked' : 'door_open';
let x, y, rot;
if (dir === 'n') { x = a.cx; y = a.y0 - WALL / 2; rot = 0; }
else if (dir === 's') { x = a.cx; y = a.y1 + WALL / 2; rot = 0; }
else if (dir === 'e') { x = a.x1 + WALL / 2; y = a.cy; rot = Math.PI / 2; }
else { x = a.x0 - WALL / 2; y = a.cy; rot = Math.PI / 2; }
const horiz = dir === 'n' || dir === 's';
const dirSeed = { n: 0, s: 2.1, e: 4.2, w: 6.3 }[dir];
ctx.fillStyle = '#050103';
if (horiz) ctx.fillRect(x - DOOR_HALF, y - WALL / 2, DOOR_HALF * 2, WALL);
else ctx.fillRect(x - WALL / 2, y - DOOR_HALF, WALL, DOOR_HALF * 2);
Sprites.draw(ctx, sprite, x, y, rot, 150, false, 1, 1, 0.82);
ctx.save();
if (horiz) ctx.translate(x, y); else { ctx.translate(x, y); ctx.rotate(Math.PI / 2); }
ctx.globalAlpha = 0.20 + Math.sin(G.time * 2.0 + dirSeed) * 0.06;
ctx.fillStyle = locked ? '#ff2a3c' : '#e8724a';
ctx.fillRect(-DOOR_HALF, WALL / 2 - 8, DOOR_HALF * 2, 8);
const rimAlpha = 0.30 + Math.sin(G.time * 2.2 + dirSeed) * 0.12;
ctx.globalAlpha = rimAlpha;
ctx.fillStyle = locked ? '#ff2a3c' : '#c4172a';
ctx.fillRect(-DOOR_HALF - 2, -WALL / 2 - 2, 3, WALL + 4);
ctx.fillRect(DOOR_HALF - 1, -WALL / 2 - 2, 3, WALL + 4);
ctx.globalAlpha = 1;
if (locked) {
for (let side = -1; side <= 1; side += 2) {
for (let k = 0; k < 7; k++) {
const hh = hashTile((r.gx * 3 + 17) * 31 + side * 7 + k, (r.gy * 5 + 11) * 13 + k * 3);
const ty = -WALL / 2 + 3 + (hh % 41);
const th = 4 + (hh % 3), tw = 3 + (hh % 2);
ctx.fillStyle = hh % 4 === 0 ? '#e8dcc2' : '#cfc0a4';
ctx.beginPath();
ctx.moveTo(side * DOOR_HALF, ty - tw);
ctx.lineTo(side * DOOR_HALF, ty + tw);
ctx.lineTo(side * (DOOR_HALF - th), ty);
ctx.closePath(); ctx.fill();
}
}
}
ctx.restore();
const chevOff = dir === 'n' ? -1 : (dir === 's' ? 1 : 0);
const chevOffX = dir === 'w' ? -1 : (dir === 'e' ? 1 : 0);
ctx.save();
ctx.globalAlpha = 0.5 + Math.sin(G.time * 3 + dirSeed) * 0.2;
ctx.strokeStyle = locked ? '#ff2a3c' : '#e8b04a';
ctx.lineWidth = 3;
for (let c = 1; c <= 2; c++) {
const d0 = WALL + 10 + c * 12;
ctx.beginPath();
if (horiz) {
const yy = y + chevOff * d0;
ctx.moveTo(x - 10, yy); ctx.lineTo(x, yy + chevOff * 8); ctx.lineTo(x + 10, yy);
} else {
const xx = x + chevOffX * d0;
ctx.moveTo(xx, y - 10); ctx.lineTo(xx + chevOffX * 8, y); ctx.lineTo(xx, y + 10);
}
ctx.stroke();
}
ctx.restore();
if (locked) {
ctx.save();
ctx.globalAlpha = 0.5 + Math.sin(G.time * 6) * 0.2;
ctx.fillStyle = '#8f1f2a';
if (horiz) ctx.fillRect(x - DOOR_HALF, y - 8, DOOR_HALF * 2, 16);
else ctx.fillRect(x - 8, y - DOOR_HALF, 16, DOOR_HALF * 2);
ctx.restore();
}
}
}
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