Run Detail
completedmercury-3Recorded for these videos
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Provider
openrouter
Challenge Version
v1.0
Turns
1
Duration
124.2s
Total Tokens
64,591
Input Tokens
708
Output Tokens
63,883
Reasoning Tokens
53,989
Reasoning Effort
default
Cached Input Tokens
1
Est. Cost
$0.0224
Started
10/21/2026, 9:24:16 PM
OR Provider
Inception
Finish Reason
stop
Generation ID
gen-1792617856-arWwGDRHtDbOdHlveaoW
Turns (1)
Turn #1
708 in63,883 out53,989 reasoning1 cached64,591 total124.2s
user
You are a game developer who ships browser demos that have to work on the first click, in front of an audience, on someone else's laptop.
Build me a Tesla Cybertruck monster-truck rally as one self-contained HTML page. A fairly small stadium, a big crowd in the stands, artificial hills and debris across the floor, and trucks slamming into each other.
Then make it match the spec below exactly. The spec is the challenge; a great-looking rally that ignores it is a miss.
The build
- One file. Everything — HTML, CSS, JS — in a single
.htmlpage. No build step. Saved to disk and double-clicked, it runs. - One external request, maximum. You may load three.js from a CDN, pinned to an exact version. That is the only network request the page is permitted to make. No second library, no font, no stylesheet, no image file, no audio file.
- Sound is optional, and if you include it, generate it with the Web Audio API. No audio assets.
- No storage. No
localStorage,sessionStorage, cookies orindexedDB. It runs in a sandboxed frame where touching them throws.
The spec
- Exactly five trucks. One the player drives, four rivals under AI. Not four, not six — five.
- Name the arena. Invent a name for the venue and show it in the HUD, on screen, during play.
- The HUD shows the arena name, a score, and a clock. Nothing else is required.
- At least three distinct obstacle types on the floor — the trucks should have something to hit besides each other.
- A crowd in the stands that is visibly a crowd, all the way round.
- Drive with the keyboard. Arrow keys or WASD. Say which in the HUD or an overlay.
- Collisions matter. Ramming a rival does something — score, a visible reaction, a wreck state. Your call, but it must be visible.
Two modes that are not the game
Both are checkable in ten seconds, which is why they are here.
#demo— if the page URL ends in#demo, the game starts with 20 seconds on the clock and the score already at 5000. This must run through the real game state, not a cosmetic overlay. Everything else behaves normally.Pfor photo mode — pressingPfreezes the action and overlays the arena name and the current score, held untilPis pressed again. The simulation stops; it does not keep playing behind the card.
Answer in exactly these sections
The pitch
One sentence: the name of your rally and what it looks like.
The game
Exactly one fenced html block containing the whole page and nothing else.
The notes
Exactly four bullets.
- Five trucks: how you kept four AI rivals from clumping into one moving wall.
- Demo mode: the line of real game state
#demosets, and why it is not an overlay. - Photo mode: what you actually stop when
Pis pressed — the render loop, the physics step, or both. - Collisions: one short paragraph on the collision model you implemented. Not what it looks like — what it computes.
assistant
The pitch
Cyber Slam Colosseum is a packed, neon-lit arena where angular Cybertrucks tear across dirt mounds, tire piles, and boulders while four AI rivals hunt for the same slam score.
The game
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="icon" href="data:,">
<title>Cyber Slam Colosseum</title>
<style>
html, body {
margin: 0;
height: 100%;
overflow: hidden;
background: #000;
font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
#hud {
position: fixed;
top: 0;
left: 0;
right: 0;
padding: 12px 18px;
display: flex;
justify-content: space-between;
align-items: flex-start;
pointer-events: none;
color: white;
background: linear-gradient(rgba(0,0,0,0.7), transparent);
z-index: 10;
}
#arenaName {
font-size: 18px;
font-weight: 900;
letter-spacing: 0.14em;
}
#status {
margin-top: 6px;
font-size: 16px;
font-weight: 700;
color: #ffd966;
min-height: 1.2em;
}
.hud-right {
text-align: right;
}
#score {
font-size: 30px;
font-weight: 900;
letter-spacing: 0.04em;
color: #fff;
}
#clock {
font-size: 22px;
font-weight: 700;
color: #cfd8ff;
}
#controls {
position: fixed;
bottom: 10px;
left: 50%;
transform: translateX(-50%);
color: #eee;
background: rgba(0,0,0,0.55);
padding: 6px 14px;
border-radius: 20px;
font-size: 13px;
letter-spacing: 0.03em;
z-index: 10;
white-space: nowrap;
}
#photo {
position: fixed;
inset: 0;
display: none;
align-items: center;
justify-content: center;
background: rgba(0,0,0,0.78);
color: white;
text-align: center;
z-index: 20;
}
#photo.show {
display: flex;
}
#photo .title {
font-size: 54px;
font-weight: 900;
letter-spacing: 0.18em;
color: #ffd966;
}
#photo .score {
font-size: 32px;
margin-top: 18px;
font-weight: 700;
}
#photo .hint {
margin-top: 12px;
font-size: 14px;
opacity: 0.6;
}
</style>
</head>
<body>
<div id="hud">
<div class="hud-left">
<div id="arenaName">CYBER SLAM COLOSSEUM</div>
<div id="status"></div>
</div>
<div class="hud-right">
<div id="score">0</div>
<div id="clock">TIME 01:30</div>
</div>
</div>
<div id="controls">WASD / ARROW KEYS — DRIVE P — PHOTO</div>
<div id="photo">
<div>
<div class="title">CYBER SLAM COLOSSEUM</div>
<div class="score" id="photoScore">SCORE 0</div>
<div class="hint">PHOTO MODE — PRESS P TO RESUME</div>
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
<script>
(function () {
"use strict";
function clamp(v, a, b) { return v < a ? a : (v > b ? b : v); }
function normAngle(a) {
while (a > Math.PI) a -= Math.PI * 2;
while (a < -Math.PI) a += Math.PI * 2;
return a;
}
function fmtTime(t) {
if (t < 0) t = 0;
const m = Math.floor(t / 60);
const s = Math.floor(t % 60);
return (m < 10 ? "0" : "") + m + ":" + (s < 10 ? "0" : "") + s;
}
const hudScore = document.getElementById("score");
const hudTime = document.getElementById("clock");
const hudStatus = document.getElementById("status");
const photoEl = document.getElementById("photo");
const photoScore = document.getElementById("photoScore");
const DEMO = location.hash === "#demo";
let score = DEMO ? 5000 : 0;
let timeLeft = DEMO ? 20 : 90;
let gameOver = false;
let photoMode = false;
let shake = 0;
let statusMessage = "";
let statusTimer = 0;
const keys = {};
// ---- floor texture ----------------------------------------------------
const floorCanvas = document.createElement("canvas");
floorCanvas.width = 512;
floorCanvas.height = 512;
const fctx = floorCanvas.getContext("2d");
fctx.fillStyle = "#3b2e1c";
fctx.fillRect(0, 0, 512, 512);
for (let i = 0; i < 1600; i++) {
fctx.fillStyle = "rgba(" +
(25 + Math.random() * 70) + "," +
(18 + Math.random() * 50) + "," +
(8 + Math.random() * 30) + ",0.55)";
fctx.fillRect(Math.random() * 512, Math.random() * 512, 1 + Math.random() * 5, 1 + Math.random() * 4);
}
fctx.strokeStyle = "rgba(255,255,255,0.05)";
fctx.lineWidth = 18;
for (let y = -6; y <= 6; y++) {
fctx.beginPath();
fctx.moveTo(0, y * 85 + 256);
fctx.lineTo(512, y * 85 + 256);
fctx.stroke();
}
const floorTex = new THREE.CanvasTexture(floorCanvas);
floorTex.wrapS = floorTex.wrapT = THREE.RepeatWrapping;
floorTex.repeat.set(6, 4);
// ---- renderer / scene -------------------------------------------------
const scene = new THREE.Scene();
scene.background = new THREE.Color(0x0c1422);
scene.fog = new THREE.Fog(0x0c1422, 90, 180);
const camera = new THREE.PerspectiveCamera(65, window.innerWidth / window.innerHeight, 0.1, 250);
const renderer = new THREE.WebGLRenderer({ antialias: true });
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2));
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.PCFSoftShadowMap;
document.body.appendChild(renderer.domElement);
scene.add(new THREE.HemisphereLight(0xcfe0ff, 0x3a2a1a, 0.9));
const sun = new THREE.DirectionalLight(0xffeedd, 1.15);
sun.position.set(25, 45, 18);
sun.castShadow = true;
sun.shadow.mapSize.set(1024, 1024);
sun.shadow.camera.left = -55;
sun.shadow.camera.right = 55;
sun.shadow.camera.top = 55;
sun.shadow.camera.bottom = -55;
sun.shadow.camera.far = 130;
scene.add(sun);
scene.add(new THREE.AmbientLight(0x404080, 0.35));
const ground = new THREE.Mesh(
new THREE.PlaneGeometry(120, 80),
new THREE.MeshLambertMaterial({ map: floorTex })
);
ground.rotation.x = -Math.PI / 2;
ground.receiveShadow = true;
scene.add(ground);
// ---- stadium shell ----------------------------------------------------
const standMat = new THREE.MeshLambertMaterial({ color: 0x202638 });
const wallMat = new THREE.MeshLambertMaterial({ color: 0x617a8a });
function addBox(w, h, d, x, y, z, ry, mat) {
const m = new THREE.Mesh(new THREE.BoxGeometry(w, h, d), mat || standMat);
m.position.set(x, y, z);
m.rotation.y = ry || 0;
m.castShadow = true;
m.receiveShadow = true;
scene.add(m);
return m;
}
// inner barriers
addBox(64, 1.6, 1, 0, 0.8, 20, wallMat);
addBox(64, 1.6, 1, 0, 0.8, -20, wallMat);
addBox(1, 1.6, 44, 30, 0.8, 0, wallMat);
addBox(1, 1.6, 44, -30, 0.8, 0, wallMat);
// stands
addBox(96, 5, 10, 0, 2.5, 30);
addBox(96, 5, 10, 0, 2.5, -30);
addBox(10, 5, 72, 34, 2.5, 0);
addBox(10, 5, 72, -34, 2.5, 0);
addBox(96, 8, 1, 0, 4, 36);
addBox(96, 8, 1, 0, 4, -36);
addBox(1, 8, 76, 40, 4, 0);
addBox(1, 8, 76, -40, 4, 0);
// ---- crowd ------------------------------------------------------------
function addCrowd() {
const COUNT = 1600;
const bodyGeo = new THREE.BoxGeometry(0.55, 1.1, 0.4);
const headGeo = new THREE.SphereGeometry(0.22, 6, 5);
const bodyMat = new THREE.MeshLambertMaterial({ color: 0xffffff });
const headMat = new THREE.MeshLambertMaterial({ color: 0xffffff });
const bodies = new THREE.InstancedMesh(bodyGeo, bodyMat, COUNT);
const heads = new THREE.InstancedMesh(headGeo, headMat, COUNT);
const dummy = new THREE.Object3D();
const col = new THREE.Color();
let i = 0;
function place(x, y, z) {
dummy.position.set(x, y, z);
dummy.rotation.set(0, Math.random() * Math.PI * 2, 0);
dummy.scale.set(1, 0.9 + Math.random() * 0.3, 1);
dummy.updateMatrix();
bodies.setMatrixAt(i, dummy.matrix);
if (bodies.setColorAt) {
bodies.setColorAt(i, col.setHSL(Math.random(), 0.55, 0.35 + Math.random() * 0.35));
}
dummy.position.y += 1.0;
dummy.updateMatrix();
heads.setMatrixAt(i, dummy.matrix);
if (heads.setColorAt) {
heads.setColorAt(i, col.setHSL(0.05, 0.6, 0.55 + Math.random() * 0.25));
}
i++;
}
for (let j = 0; j < 400; j++) place((Math.random() - 0.5) * 90, 5.1 + Math.random() * 0.4, 26 + Math.random() * 8);
for (let j = 0; j < 400; j++) place((Math.random() - 0.5) * 90, 5.1 + Math.random() * 0.4, -34 + Math.random() * 8);
for (let j = 0; j < 400; j++) place(30 + Math.random() * 8, 5.1 + Math.random() * 0.4, (Math.random() - 0.5) * 72);
for (let j = 0; j < 400; j++) place(-38 + Math.random() * 8, 5.1 + Math.random() * 0.4, (Math.random() - 0.5) * 72);
bodies.instanceMatrix.needsUpdate = true;
heads.instanceMatrix.needsUpdate = true;
if (bodies.instanceColor) bodies.instanceColor.needsUpdate = true;
if (heads.instanceColor) heads.instanceColor.needsUpdate = true;
scene.add(bodies);
scene.add(heads);
}
addCrowd();
// path guide line
const trackPts = [];
for (let i = 0; i < 72; i++) {
const a = i / 72 * Math.PI * 2;
trackPts.push(new THREE.Vector3(20 * Math.cos(a), 0.05, 12 * Math.sin(a)));
}
const trackLine = new THREE.LineLoop(
new THREE.BufferGeometry().setFromPoints(trackPts),
new THREE.LineBasicMaterial({ color: 0x334455, transparent: true, opacity: 0.35 })
);
scene.add(trackLine);
// ---- obstacles --------------------------------------------------------
const obstacles = [];
function addObstacle(type, x, z) {
const g = new THREE.Group();
let radius = 2;
if (type === "mound") {
const mound = new THREE.Mesh(
new THREE.SphereGeometry(2.6, 10, 8),
new THREE.MeshLambertMaterial({ color: 0x68482a })
);
mound.scale.y = 0.55;
mound.position.y = 1.2;
mound.castShadow = true;
mound.receiveShadow = true;
g.add(mound);
const base = new THREE.Mesh(
new THREE.CircleGeometry(2.9, 12),
new THREE.MeshLambertMaterial({ color: 0x374d2a })
);
base.rotation.x = -Math.PI / 2;
base.position.y = 0.05;
g.add(base);
radius = 2.9;
} else if (type === "tires") {
const tireMat = new THREE.MeshLambertMaterial({ color: 0x181818 });
const rimMat = new THREE.MeshLambertMaterial({ color: 0x555555 });
for (let i = 0; i < 4; i++) {
const tire = new THREE.Mesh(new THREE.TorusGeometry(1.0, 0.35, 8, 16), tireMat);
tire.rotation.x = Math.PI / 2;
tire.position.y = 0.5 + i * 0.8;
tire.castShadow = true;
g.add(tire);
const rim = new THREE.Mesh(new THREE.TorusGeometry(0.45, 0.08, 6, 12), rimMat);
rim.rotation.x = Math.PI / 2;
rim.position.y = 0.5 + i * 0.8;
g.add(rim);
}
radius = 2.0;
} else if (type === "rock") {
const rock = new THREE.Mesh(
new THREE.DodecahedronGeometry(1.7, 0),
new THREE.MeshLambertMaterial({ color: 0x777f85 })
);
rock.position.y = 1.0;
rock.rotation.set(Math.random(), Math.random(), Math.random());
rock.castShadow = rock.receiveShadow = true;
g.add(rock);
const rock2 = new THREE.Mesh(
new THREE.DodecahedronGeometry(1.0, 0),
new THREE.MeshLambertMaterial({ color: 0x666d73 })
);
rock2.position.set(1.2, 0.6, -0.8);
rock2.rotation.set(Math.random(), Math.random(), Math.random());
rock2.castShadow = true;
g.add(rock2);
radius = 2.1;
} else if (type === "barrier") {
const concrete = new THREE.Mesh(
new THREE.BoxGeometry(2.2, 1.2, 1.2),
new THREE.MeshLambertMaterial({ color: 0x9aa0a8 })
);
concrete.position.y = 0.6;
concrete.castShadow = concrete.receiveShadow = true;
g.add(concrete);
const stripeMat = new THREE.MeshLambertMaterial({ color: 0xe8a020 });
for (let i = 0; i < 4; i++) {
const stripe = new THREE.Mesh(new THREE.BoxGeometry(0.35, 0.5, 1.22), stripeMat);
stripe.position.set(-1.1 + i * 0.73, 0.9, 0);
g.add(stripe);
}
radius = 1.9;
}
g.position.set(x, 0, z);
scene.add(g);
obstacles.push({ type: type, x: x, z: z, radius: radius, group: g });
}
addObstacle("mound", 0, 0);
addObstacle("rock", -6, 0);
addObstacle("tires", 6, 0);
addObstacle("barrier", 0, 6);
addObstacle("rock", 0, -6);
addObstacle("mound", -5, 5);
addObstacle("tires", 5, -5);
addObstacle("barrier", -5, -5);
addObstacle("rock", -22, 12);
addObstacle("tires", 22, 12);
addObstacle("mound", -22, -12);
addObstacle("barrier", 22, -12);
// ---- trucks -----------------------------------------------------------
let trucks = [];
function makeTruck(isPlayer, bodyHex, accentHex) {
const group = new THREE.Group();
const bodyMat = new THREE.MeshLambertMaterial({ color: bodyHex });
const accentMat = new THREE.MeshLambertMaterial({ color: accentHex });
const glassMat = new THREE.MeshLambertMaterial({ color: 0x8ab8d8 });
const wheelMat = new THREE.MeshLambertMaterial({ color: 0x141414 });
const paintMats = [bodyMat, accentMat];
const add = (w, h, d, x, y, z, rx, ry, rz, mat) => {
const m = new THREE.Mesh(new THREE.BoxGeometry(w, h, d), mat || bodyMat);
m.position.set(x, y, z);
m.rotation.set(rx || 0, ry || 0, rz || 0);
m.castShadow = true;
m.receiveShadow = true;
group.add(m);
return m;
};
// Cybertruck-ish angular body
add(2.6, 0.55, 5.0, 0, 0.95, 0);
add(2.4, 0.35, 1.5, 0, 1.25, 1.7);
add(2.6, 0.30, 0.5, 0, 1.30, 2.5);
add(2.3, 0.90, 1.9, 0, 1.75, -0.35);
add(2.0, 0.30, 1.6, 0, 2.20, -0.45);
add(2.2, 0.70, 0.15, 0, 1.70, 0.55, 0.7, 0, 0, glassMat);
add(2.6, 0.25, 2.6, 0, 1.45, -1.6);
add(2.6, 0.60, 0.2, 0, 1.25, -2.5);
add(2.0, 0.50, 0.4, 0, 2.20, -0.55, 0, 0, 0, accentMat);
const wheelGeo = new THREE.CylinderGeometry(0.55, 0.55, 0.5, 16);
const frontPivots = [];
function addWheel(x, z, isFront) {
const pivot = new THREE.Group();
pivot.position.set(x, 0.55, z);
const wheel = new THREE.Mesh(wheelGeo, wheelMat);
wheel.rotation.z = Math.PI / 2;
pivot.add(wheel);
group.add(pivot);
if (isFront) frontPivots.push(pivot);
}
addWheel(-1.35, 1.8, true);
addWheel(1.35, 1.8, true);
addWheel(-1.35, -1.8, false);
addWheel(1.35, -1.8, false);
const truck = {
isPlayer: isPlayer,
group: group,
pos: new THREE.Vector3(),
velocity: new THREE.Vector3(),
yaw: 0,
steer: 0,
throttle: 0,
radius: 2.15,
maxSpeed: isPlayer ? 26 : 16 + Math.random() * 4,
accel: isPlayer ? 22 : 17,
drag: 1.8,
turnRate: isPlayer ? 2.1 : 1.7,
hitCooldown: 0,
wreckTimer: 0,
paintMats: paintMats,
frontPivots: frontPivots,
aiPhase: 0,
lane: 0,
lead: 0.6
};
scene.add(group);
return truck;
}
const playerTruck = makeTruck(true, 0xc0c6cc, 0x55c8ff);
playerTruck.pos.set(-22, 0, -4);
playerTruck.yaw = 0;
trucks.push(playerTruck);
const aiColors = [0xdd4455, 0x4488dd, 0xe8b820, 0x44aa66];
const aiLanes = [-4, -1.5, 1.5, 4];
const aiAngles = [0.4, Math.PI / 2 + 0.4, Math.PI + 0.4, Math.PI * 1.5 + 0.4];
for (let i = 0; i < 4; i++) {
const t = makeTruck(false, aiColors[i], 0xcccccc);
const lane = aiLanes[i];
const a = 20 + lane;
const b = 12 + lane;
const angle = aiAngles[i];
t.pos.set(a * Math.cos(angle), 0, b * Math.sin(angle));
t.yaw = Math.atan2(-a * Math.sin(angle), b * Math.cos(angle));
t.lane = lane;
t.aiPhase = angle;
t.lead = 0.5 + Math.random() * 0.5;
t.maxSpeed = 16 + Math.random() * 4;
trucks.push(t);
}
// ---- particles --------------------------------------------------------
const sparks = [];
const smokes = [];
function makePools() {
for (let i = 0; i < 40; i++) {
const m = new THREE.Mesh(
new THREE.OctahedronGeometry(0.18),
new THREE.MeshBasicMaterial({ color: 0xffcc33, transparent: true, opacity: 1 })
);
m.visible = false;
scene.add(m);
sparks.push({ mesh: m, life: 0, vel: new THREE.Vector3() });
}
for (let i = 0; i < 40; i++) {
const m = new THREE.Mesh(
new THREE.SphereGeometry(0.4, 6, 5),
new THREE.MeshBasicMaterial({ color: 0x555555, transparent: true, opacity: 0.55 })
);
m.visible = false;
scene.add(m);
smokes.push({ mesh: m, life: 0, vel: new THREE.Vector3() });
}
}
function spawnSparks(pos) {
const p = sparks.find(function (q) { return !q.mesh.visible; });
if (!p) return;
p.mesh.visible = true;
p.life = 0.5;
p.mesh.position.copy(pos);
p.mesh.position.y += 0.8;
p.vel.set((Math.random() - 0.5) * 10, Math.random() * 4 + 2, (Math.random() - 0.5) * 10);
}
function spawnSmoke(pos) {
const p = smokes.find(function (q) { return !q.mesh.visible; });
if (!p) return;
p.mesh.visible = true;
p.life = 1.0;
p.mesh.position.copy(pos);
p.mesh.position.y += 0.6;
p.mesh.scale.set(0.6, 0.6, 0.6);
p.mesh.material.opacity = 0.55;
p.vel.set((Math.random() - 0.5) * 1.5, 1.5 + Math.random() * 1.5, (Math.random() - 0.5) * 1.5);
}
function updateParticles(dt) {
for (let i = 0; i < sparks.length; i++) {
const p = sparks[i];
if (!p.mesh.visible) continue;
p.life -= dt;
if (p.life <= 0) {
p.mesh.visible = false;
continue;
}
p.mesh.position.addScaledVector(p.vel, dt);
p.vel.y -= 14 * dt;
p.mesh.material.opacity = p.life / 0.5;
}
for (let i = 0; i < smokes.length; i++) {
const p = smokes[i];
if (!p.mesh.visible) continue;
p.life -= dt;
if (p.life <= 0) {
p.mesh.visible = false;
continue;
}
p.mesh.position.addScaledVector(p.vel, dt);
const s = 0.6 + (1 - p.life) * 1.8;
p.mesh.scale.set(s, s, s);
p.mesh.material.opacity = Math.max(0, p.life * 0.45);
}
}
makePools();
// ---- physics / update -------------------------------------------------
function updateVehicle(truck, dt) {
const forward = new THREE.Vector3(Math.sin(truck.yaw), 0, Math.cos(truck.yaw));
const speedAlong = truck.velocity.dot(forward);
const reverse = speedAlong < -0.1 ? -1 : 1;
truck.yaw += truck.steer * truck.turnRate * dt * reverse;
truck.velocity.addScaledVector(forward, truck.throttle * truck.accel * dt);
let speed = truck.velocity.length();
if (speed > 0.01) {
const drag = Math.max(0, 1 - truck.drag * dt);
truck.velocity.multiplyScalar(drag);
if (speed > truck.maxSpeed) truck.velocity.setLength(truck.maxSpeed);
}
if (speed < 0.05 && truck.throttle === 0) {
truck.velocity.set(0, 0, 0);
}
truck.position.addScaledVector(truck.velocity, dt);
}
function handleWall(truck) {
const LX = 28;
const LZ = 18;
if (truck.position.x > LX) {
truck.position.x = LX;
if (truck.velocity.x > 0) truck.velocity.x *= -0.4;
} else if (truck.position.x < -LX) {
truck.position.x = -LX;
if (truck.velocity.x < 0) truck.velocity.x *= -0.4;
}
if (truck.position.z > LZ) {
truck.position.z = LZ;
if (truck.velocity.z > 0) truck.velocity.z *= -0.4;
} else if (truck.position.z < -LZ) {
truck.position.z = -LZ;
if (truck.velocity.z < 0) truck.velocity.z *= -0.4;
}
}
function collideWithObstacles(truck) {
for (let i = 0; i < obstacles.length; i++) {
const ob = obstacles[i];
const dx = truck.position.x - ob.x;
const dz = truck.position.z - ob.z;
const dist = Math.hypot(dx, dz);
const minDist = ob.radius + truck.radius;
if (dist >= minDist) continue;
let nx = 1, nz = 0;
if (dist > 0.0001) {
nx = dx / dist;
nz = dz / dist;
} else if (Math.abs(truck.velocity.x) + Math.abs(truck.velocity.z) > 0.0001) {
const len = truck.velocity.length();
nx = truck.velocity.x / len;
nz = truck.velocity.z / len;
}
truck.position.x = ob.x + nx * minDist;
truck.position.z = ob.z + nz * minDist;
const vn = truck.velocity.x * nx + truck.velocity.z * nz;
if (vn < 0) {
truck.velocity.x -= (1 + 0.4) * vn * nx;
truck.velocity.z -= (1 + 0.4) * vn * nz;
spawnSmoke(truck.position);
}
}
}
function collideTrucks() {
for (let i = 0; i < trucks.length; i++) {
for (let j = i + 1; j < trucks.length; j++) {
const A = trucks[i];
const B = trucks[j];
const dx = B.pos.x - A.pos.x;
const dz = B.pos.z - A.pos.z;
const dist = Math.hypot(dx, dz);
const minDist = A.radius + B.radius;
if (dist >= minDist) continue;
let nx = 1, nz = 0;
if (dist > 0.0001) {
nx = dx / dist;
nz = dz / dist;
} else {
const totalSpeed = Math.abs(A.velocity.x) + Math.abs(A.velocity.z) + Math.abs(B.velocity.x) + Math.abs(B.velocity.z);
if (totalSpeed > 0.0001) {
nx = (A.velocity.x - B.velocity.x) / totalSpeed;
nz = (A.velocity.z - B.velocity.z) / totalSpeed;
const len = Math.hypot(nx, nz);
if (len > 0.0001) {
nx /= len;
nz /= len;
} else {
nx = 1;
nz = 0;
}
}
}
const overlap = (minDist - dist) / 2;
A.pos.x -= nx * overlap;
A.pos.z -= nz * overlap;
B.pos.x += nx * overlap;
B.pos.z += nz * overlap;
const relv = (B.velocity.x - A.velocity.x) * nx + (B.velocity.z - A.velocity.z) * nz;
const impact = Math.abs(relv);
if (relv < 0) {
const impulse = -(1 + 0.35) * relv / 2;
A.velocity.x -= impulse * nx;
A.velocity.z -= impulse * nz;
B.velocity.x += impulse * nx;
B.velocity.z += impulse * nz;
}
if (impact > 4) {
spawnSparks(new THREE.Vector3((A.pos.x + B.pos.x) / 2, 1, (A.pos.z + B.pos.z) / 2));
}
if ((A.isPlayer || B.isPlayer) && impact > 5) {
const attacker = A.isPlayer ? A : B;
const rival = A.isPlayer ? B : A;
if (attacker.hitCooldown <= 0 && rival.hitCooldown <= 0) {
const pts = Math.round(clamp(impact * 5, 10, 250));
score += pts;
statusMessage = "SLAM +" + pts + "!";
statusTimer = 1.6;
rival.wreckTimer = 2.0;
attacker.hitCooldown = 1.0;
rival.hitCooldown = 1.0;
shake = Math.min(0.9, 0.25 + impact * 0.02);
spawnSparks(rival.pos);
}
}
}
}
}
function updateVisuals(truck) {
truck.group.position.copy(truck.pos);
truck.group.rotation.y = truck.yaw;
for (let i = 0; i < truck.frontPivots.length; i++) {
truck.frontPivots[i].rotation.y = truck.steer * 0.4;
}
}
function updateWreck(truck, dt) {
if (truck.wreckTimer > 0) {
truck.wreckTimer -= dt;
const k = Math.max(0, truck.wreckTimer);
const hex = k > 0 ? 0x883322 : 0x000000;
for (let i = 0; i < truck.paintMats.length; i++) {
truck.paintMats[i].emissive.setHex(hex);
}
if (k > 0 && Math.random() < 0.3) spawnSmoke(truck.pos);
} else {
for (let i = 0; i < truck.paintMats.length; i++) {
truck.paintMats[i].emissive.setHex(0x000000);
}
}
}
function updateAI(truck, dt) {
const a = 20 + truck.lane;
const b = 12 + truck.lane;
const raw = Math.atan2(truck.pos.z / b, truck.pos.x / a);
let ph = raw;
while (ph - truck.aiPhase > Math.PI) ph -= Math.PI * 2;
while (ph - truck.aiPhase < -Math.PI) ph += Math.PI * 2;
truck.aiPhase = ph;
const th = truck.aiPhase + truck.lead;
let tx = a * Math.cos(th);
let tz = b * Math.sin(th);
// separation from other trucks
for (let i = 0; i < trucks.length; i++) {
const other = trucks[i];
if (other === truck) continue;
const dx = truck.pos.x - other.pos.x;
const dz = truck.pos.z - other.pos.z;
const d = Math.hypot(dx, dz);
if (d < 5.5 && d > 0.001) {
const f = (5.5 - d) / 5.5;
tx += (dx / d) * f * 5;
tz += (dz / d) * f * 5;
}
}
// obstacle avoidance
for (let i = 0; i < obstacles.length; i++) {
const ob = obstacles[i];
const dx = truck.pos.x - ob.x;
const dz = truck.pos.z - ob.z;
const d = Math.hypot(dx, dz);
const min = ob.radius + 3.5;
if (d < min && d > 0.001) {
const f = (min - d) / min;
tx += (dx / d) * f * 6;
tz += (dz / d) * f * 6;
}
}
const desired = Math.atan2(tx - truck.pos.x, tz - truck.pos.z);
const diff = normAngle(desired - truck.yaw);
truck.steer = clamp(diff * 2.2, -1, 1);
const ad = Math.abs(diff);
truck.throttle = ad > 1.5 ? 0.35 : (ad > 0.5 ? 0.75 : 1.0);
if (truck.wreckTimer > 0) {
truck.throttle = 0.25;
truck.steer *= 0.6;
}
}
function updatePlayer(truck, dt) {
const left = keys.ArrowLeft || keys.KeyA;
const right = keys.ArrowRight || keys.KeyD;
const up = keys.ArrowUp || keys.KeyW;
const down = keys.ArrowDown || keys.KeyS;
truck.steer = (left ? -1 : 0) + (right ? 1 : 0);
truck.throttle = (up ? 1 : 0) - (down ? 1 : 0);
if (truck.wreckTimer > 0) truck.throttle *= 0.5;
}
function updateCamera(dt) {
const t = trucks[0];
const forward = new THREE.Vector3(Math.sin(t.yaw), 0, Math.cos(t.yaw));
const targetCam = t.pos.clone().addScaledVector(forward, -12).add(new THREE.Vector3(0, 7.2, 0));
if (shake > 0) {
targetCam.x += (Math.random() - 0.5) * shake;
targetCam.y += (Math.random() - 0.5) * shake;
targetCam.z += (Math.random() - 0.5) * shake;
shake *= Math.max(0, 1 - dt * 6);
}
camera.position.lerp(targetCam, 1 - Math.pow(0.001, dt));
const look = t.pos.clone().addScaledVector(forward, 5).add(new THREE.Vector3(0, 1.6, 0));
camera.lookAt(look);
}
function updateHUD() {
hudScore.textContent = "SCORE " + score;
hudTime.textContent = "TIME " + fmtTime(timeLeft);
if (statusTimer > 0) {
hudStatus.textContent = statusMessage;
} else {
hudStatus.textContent = "";
}
}
function update(dt) {
timeLeft -= dt;
if (timeLeft <= 0) {
timeLeft = 0;
gameOver = true;
statusMessage = "TIME UP";
statusTimer = 999;
}
if (statusTimer > 0) statusTimer -= dt;
updatePlayer(trucks[0], dt);
for (let i = 1; i < trucks.length; i++) updateAI(trucks[i], dt);
for (let i = 0; i < trucks.length; i++) {
const t = trucks[i];
updateVehicle(t, dt);
updateWreck(t, dt);
if (t.hitCooldown > 0) t.hitCooldown -= dt;
}
for (let i = 0; i < trucks.length; i++) {
handleWall(trucks[i]);
}
for (let i = 0; i < trucks.length; i++) {
collideWithObstacles(trucks[i]);
}
for (let i = 0; i < trucks.length; i++) {
handleWall(trucks[i]);
}
collideTrucks();
for (let i = 0; i < trucks.length; i++) {
updateVisuals(trucks[i]);
}
updateParticles(dt);
updateCamera(dt);
updateHUD();
}
// ---- photo mode -------------------------------------------------------
function setPhoto(on) {
photoMode = on;
photoEl.classList.toggle("show", on);
if (on) {
photoScore.textContent = "SCORE " + score;
}
}
window.addEventListener("keydown", function (e) {
keys[e.code] = true;
if (e.code === "KeyP" && !e.repeat) {
e.preventDefault();
setPhoto(!photoMode);
}
if (["ArrowUp", "ArrowDown", "ArrowLeft", "ArrowRight", "Space"].indexOf(e.code) !== -1) {
e.preventDefault();
}
});
window.addEventListener("keyup", function (e) {
keys[e.code] = false;
});
window.addEventListener("blur", function () {
for (const k in keys) keys[k] = false;
});
window.addEventListener("resize", function () {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
});
// ---- loop -------------------------------------------------------------
updateHUD();
let lastTime = performance.now();
function animate() {
requestAnimationFrame(animate);
const now = performance.now();
const dt = Math.min((now - lastTime) / 1000, 0.033);
lastTime = now;
if (!photoMode && !gameOver) {
update(dt);
}
renderer.render(scene, camera);
}
animate();
})();
</script>
</body>
</html>
The notes
- Five trucks: I made the four AI rivals each follow a separate elliptical lane with different lane offsets, different lead angles, and slightly different max speeds, and I also add a hard separation steer when any two trucks get within 5.5 units. That keeps them from single-filing into one moving wall.
- Demo mode:
#demosets real initial game state at startup:timeLeft = 20andscore = 5000. It is not an overlay — the HUD reads those values, the timer counts down through the normal update loop, and ramming rival trucks still changes the score. - Photo mode: Pressing
Pstops the game update step — physics, AI, timer, particles, camera follow, and collision resolution all halt. The render loop stays alive only to redraw the same frozen frame behind the photo card, so nothing keeps playing behind it. - Collisions: Each truck is a horizontal circle with a 2.15-unit collision radius, and each obstacle is a static circle. On overlap I separate the bodies along the contact normal, then apply an impulse-based collision response with a 0.35–0.4 restitution coefficient. Truck-truck impacts also compute relative impact speed; if the player is involved, that impact feeds the score, a red smokey wreck state, sparks, and camera shake.
Attachments
inception/mercury-3 — page