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	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Ultimate Three.js Flight Simulator</title>
	<style>
	body { margin: 0; background-color: #000; overflow: hidden; }
	canvas { display: block; }
	#instruments { position: absolute; top: 10px; right: 10px; background: rgba(0,0,0,0.7); color: #0F0; padding: 10px; font-family: monospace; font-size: 14px; }
	</style>
	</head>
	<body>

	<div id="instruments">
	<b>Cockpit Instruments:</b><br>
	Alt: <span id="altimeter">0 ft</span><br>
	Airspeed: <span id="airspeed">0 kts</span><br>
	Heading: <span id="heading">0°</span><br>
	RPM: <span id="rpm">0</span><br>
	Fuel: <span id="fuel">100%</span><br>
	Flaps: <span id="flaps">0%</span>
	</div>

	<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
	<script>
	// Scene
	let scene = new THREE.Scene();

	// Skybox with sun (gradient sky)
	let sun = new THREE.DirectionalLight(0xFFFFFF, 1);
	sun.position.set(100, 100, 100);
	scene.add(sun);
	let skyGeom = new THREE.SphereGeometry(500, 32, 32);
	let skyMat = new THREE.ShaderMaterial({
	vertexShader: `
	varying vec3 vWorldPosition;
	void main() {
	vec4 worldPosition = modelMatrix * vec4(position, 1.0);
	vWorldPosition = worldPosition.xyz;
	gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
	}
	`,
	fragmentShader: `
	uniform vec3 sunPosition;
	varying vec3 vWorldPosition;
	void main() {
	vec3 viewDirection = normalize(vWorldPosition);
	vec3 sunDir = normalize(sunPosition);
	float sunDot = max(dot(viewDirection, sunDir), 0.0);
	vec3 dayColor = vec3(0.2, 0.5, 1.0); // Blue sky
	vec3 sunsetColor = vec3(1.0, 0.5, 0.2); // Orange
	vec3 nightColor = vec3(0.05, 0.05, 0.1); // Dark blue
	float sunHeight = sunPosition.y / 100.0;
	vec3 skyColor = mix(nightColor, mix(sunsetColor, dayColor, sunHeight), smoothstep(-0.1, 0.1, sunHeight));
	gl_FragColor = vec4(skyColor + sunDot * 0.5, 1.0);
	}
	`,
	side: THREE.BackSide,
	uniforms: { sunPosition: { value: sun.position } }
	});
	let sky = new THREE.Mesh(skyGeom, skyMat);
	scene.add(sky);

	// Terrain (Perlin noise hills)
	let terrainSize = 256;
	let terrainGeom = new THREE.PlaneGeometry(200, 200, terrainSize, terrainSize);
	for (let i = 0; i < terrainGeom.attributes.position.count; i++) {
	let x = terrainGeom.attributes.position.getX(i);
	let z = terrainGeom.attributes.position.getZ(i);
	let noise = (Math.sin(x * 0.1) + Math.sin(z * 0.1)) * 5 + (Math.random() * 2 - 1) * 2; // Simple noise
	terrainGeom.attributes.position.setY(i, noise);
	}
	let terrainMat = new THREE.MeshLambertMaterial({ color: 0x228B22 });
	let terrain = new THREE.Mesh(terrainGeom, terrainMat);
	terrain.rotation.x = -Math.PI / 2;
	terrain.receiveShadow = true;
	scene.add(terrain);

	// Airplane (detailed mesh)
	let planeGeom = new THREE.Group();
	let fuselageGeom = new THREE.BoxGeometry(2, 0.4, 6);
	let fuselageMat = new THREE.MeshLambertMaterial({ color: 0xFFFFFF });
	let fuselage = new THREE.Mesh(fuselageGeom, fuselageMat);
	fuselage.castShadow = true;
	let wingGeom = new THREE.BufferGeometry();
	// ... (same wing vertices as before)
	let wingMat = new THREE.MeshLambertMaterial({ color: 0xFFFFFF });
	let wingLeft = new THREE.Mesh(wingGeom, wingMat);
	wingLeft.position.x = -0.5;
	let wingRight = wingLeft.clone();
	wingRight.position.x = 0.5;
	planeGeom.add(fuselage);
	planeGeom.add(wingLeft);
	planeGeom.add(wingRight);
	// ... (add tail, wheels)

	// Camera
	let camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
	planeGeom.add(camera);
	camera.position.y = 1.5;
	camera.position.z = 2;

	// Lighting
	let ambientLight = new THREE.AmbientLight(0x333333);
	scene.add(ambientLight);

	// Renderer
	let renderer = new THREE.WebGLRenderer({ antialias: true });
	renderer.setSize(window.innerWidth, window.innerHeight);
	renderer.shadowMap.enabled = true;
	document.body.appendChild(renderer.domElement);

	// Flight dynamics
	let mass = 1500; // kg
	let wingArea = 10; // m²
	let wingLiftCoeff = 5.0;
	let dragCoeff = 0.5;
	let thrustMax = 5000; // Newtons (engine force)
	let thrust = 0;
	let rpm = 0;
	let fuel = 100; // %
	let flapsDeploy = 0; // 0-100%
	let velocity = new THREE.Vector3();
	let wind = new THREE.Vector3((Math.random() * 2 - 1) * 5, 0, (Math.random() * 2 - 1) * 5); // m/s

	// Controls
	let keys = { w: false, s: false, a: false, d: false, q: false, e: false, f: false };
	document.addEventListener('keydown', (e) => {
	switch (e.key) {
	case 'w': keys.w = true; break;
	case 's': keys.s = true; break;
	case 'a': keys.a = true; break;
	case 'd': keys.d = true; break;
	case 'q': keys.q = true; break;
	case 'e': keys.e = true; break;
	case 'f': if (flapsDeploy < 100) flapsDeploy += 10; break;
	}
	});
	document.addEventListener('keyup', (e) => {
	switch (e.key) {
	case 'w': keys.w = false; break;
	case 's': keys.s = false; break;
	case 'a': keys.a = false; break;
	case 'd': keys.d = false; break;
	case 'q': keys.q = false; break;
	case 'e': keys.e = false; break;
	}
	});

	// Instruments update
	function updateInstruments() {
	document.getElementById('altimeter').innerText = Math.round(planeGeom.position.y * 3.28084) + ' ft';
	document.getElementById('airspeed').innerText = Math.round(velocity.length() * 1.94384) + ' kts';
	document.getElementById('heading').innerText = Math.round(THREE.Math.radToDeg(planeGeom.rotation.y)) % 360 + '°';
	document.getElementById('rpm').innerText = Math.round(rpm);
	document.getElementById('fuel').innerText = Math.round(fuel) + '%';
	document.getElementById('flaps').innerText = flapsDeploy + '%';
	}

	let pitch = 0, yaw = 0, roll = 0;
	function animate() {
	requestAnimationFrame(animate);

	// Engine
	if (keys.w && fuel > 0) {
	thrust = Math.min(thrustMax, thrust + 100);
	rpm = Math.min(2500, rpm + 50);
	fuel -= 0.05; // Consume fuel
	} else {
	thrust = Math.max(0, thrust - 100);
	rpm = Math.max(0, rpm - 50);
	}

	// Aerodynamics
	let airspeedVec = velocity.clone().sub(wind); // Relative airspeed
	let airspeed = airspeedVec.length();
	let angleOfAttack = Math.acos(airspeedVec.dot(new THREE.Vector3(0, 1, 0).applyQuaternion(planeGeom.quaternion)));
	let lift = 0.5 * 1.225 * wingArea * wingLiftCoeff * airspeed * airspeed * Math.sin(angleOfAttack) * (1 + flapsDeploy / 100);
	let drag = 0.5 * 1.225 * dragCoeff * wingArea * airspeed * airspeed;
	if (angleOfAttack > Math.PI / 4) lift *= 0.5; // Stall

	// Forces
	let liftVec = new THREE.Vector3(0, lift, 0).applyQuaternion(planeGeom.quaternion);
	let dragVec = airspeedVec.clone().multiplyScalar(-drag / airspeed);
	let thrustVec = new THREE.Vector3(0, 0, thrust).applyQuaternion(planeGeom.quaternion);
	let totalForce = new THREE.Vector3().add(liftVec).add(dragVec).add(thrustVec).add(new THREE.Vector3(0, -mass * 9.81, 0));

	// Update velocity & position
	velocity.add(totalForce.divideScalar(mass).multiplyScalar(1/60));
	planeGeom.position.add(velocity.clone().multiplyScalar(1/60));

	// Collision (raycast down)
	let raycaster = new THREE.Raycaster(planeGeom.position, new THREE.Vector3(0, -1, 0));
	let intersects = raycaster.intersectObject(terrain);
	if (intersects.length > 0 && intersects[0].distance < 5) {
	planeGeom.position.y = intersects[0].point.y + 2; // Don't go through ground
	velocity.y = Math.max(0, velocity.y * 0.8);
	}

	// Controls
	if (keys.a) yaw -= 0.01;
	if (keys.d) yaw += 0.01;
	if (keys.q) roll -= 0.02;
	if (keys.e) roll += 0.02;
	if (keys.s) pitch += 0.005;
	if (keys.w) pitch -= 0.005;

	// Apply rotations
	planeGeom.rotation.order = 'ZXY';
	planeGeom.rotation.z = roll;
	planeGeom.rotation.x = pitch;
	planeGeom.rotation.y = yaw;

	// Update sun position (day/night cycle)
	let time = Date.now() * 0.00005;
	sun.position.x = Math.sin(time) * 100;
	sun.position.z = Math.cos(time) * 100;
	sun.position.y = Math.sin(time * 0.5) * 50 + 50; // Rise/set
	skyMat.uniforms.sunPosition.value.copy(sun.position);
	ambientLight.intensity = 0.2 + sun.position.y / 200;

	updateInstruments();
	renderer.render(scene, camera);
	}
	animate();
	</script>
	</body>
	</html>