3d model in a page using three.js

				
					<div id="canvas-container-2" style="width: 100%; height: 100%; position: relative;max-height:100vh;">
    <div id="loading-screen" style="width: 100%; height: 90%; background-color: rgba(0,0,0,0.5); display: flex; justify-content: center; align-items: center; z-index: 1000;">
        <div style="text-align: center; color: white;">
            <img decoding="async" data-src="http://video-on-scroll.local/wp-content/uploads/2024/09/futuristic-tunnel-corridor-with-neon-glowing-light-2023-11-27-04-53-49-utc.jpeg" alt="Loading" style="max-width: 100%; max-height: 100%;" src="data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==" class="lazyload">
            <p id="loading-progress">Loading 3D Model: 0%</p>
        </div>
    </div>
    <canvas id="cubeCanvas2" style="width: 100%; height: 100%;"></canvas>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/three@0.128.0/examples/js/loaders/GLTFLoader.js"></script>

<script>
// ====== EASY TO MODIFY SETTINGS ======

// Model URL - Change this to your model's URL
const MODEL_URL = 'http://video-on-scroll.local/wp-content/uploads/2024/09/fresh_baked_bread.glb';

// Camera settings
const CAMERA_FOV = 50;
const CAMERA_NEAR = 0.1;
const CAMERA_FAR = 3000;
const CAMERA_DISTANCE_FACTOR_DESKTOP = 0.5; // Control for desktop
const CAMERA_DISTANCE_FACTOR_MOBILE = 0.8; // Control for mobile
const CAMERA_OFFSET_X = 0;
const CAMERA_OFFSET_Y = 0.3;

// Lighting settings
const DIRECTIONAL_LIGHT_COLOR = 0xffffff;
const DIRECTIONAL_LIGHT_INTENSITY = 0.2;
const AMBIENT_LIGHT_COLOR = 0xffffff;
const AMBIENT_LIGHT_INTENSITY = 5;
const ADDITIONAL_LIGHT_COLOR = 0xffffff;
const ADDITIONAL_LIGHT_INTENSITY = 0.5;

// Auto-rotation settings
const AUTO_ROTATE = true;
const AUTO_ROTATE_SPEED = 0.005;

// ====== SCENE SETUP ======

let canvas, renderer, scene, camera, light, ambientLight, additionalLight;
let model, rotationGroup, mixer, clock;

// Track initial camera distance to ensure zooming starts from this position
let initialCameraZ = null; 

function setupScene() {
    canvas = document.getElementById('cubeCanvas2');
    renderer = new THREE.WebGLRenderer({ canvas: canvas, alpha: true, antialias: true });
    renderer.setClearColor(0x000000, 0);
    renderer.setPixelRatio(window.devicePixelRatio);

    // Prevent context menu on right-click
    canvas.addEventListener('contextmenu', (e) => e.preventDefault());

    scene = new THREE.Scene();
    camera = new THREE.PerspectiveCamera(CAMERA_FOV, canvas.clientWidth / canvas.clientHeight, CAMERA_NEAR, CAMERA_FAR);

    // Setup lighting
    light = new THREE.DirectionalLight(DIRECTIONAL_LIGHT_COLOR, DIRECTIONAL_LIGHT_INTENSITY);
    light.position.set(1, 1, 1).normalize();
    scene.add(light);

    ambientLight = new THREE.AmbientLight(AMBIENT_LIGHT_COLOR, AMBIENT_LIGHT_INTENSITY);
    scene.add(ambientLight);

    additionalLight = new THREE.DirectionalLight(ADDITIONAL_LIGHT_COLOR, ADDITIONAL_LIGHT_INTENSITY);
    additionalLight.position.set(-1, -1, 5).normalize();
    scene.add(additionalLight);

    rotationGroup = new THREE.Group();
    scene.add(rotationGroup);

    clock = new THREE.Clock();

    resizeCanvas();
}


function fitModelToCanvas() {
    if (!model) return;

    const box = new THREE.Box3().setFromObject(model);
    const center = box.getCenter(new THREE.Vector3());

    model.position.sub(center);

    // Set camera distance based on whether it's mobile or desktop
    const isMobile = window.innerWidth <= 768;
    let distance = isMobile ? CAMERA_DISTANCE_FACTOR_MOBILE : CAMERA_DISTANCE_FACTOR_DESKTOP;

    // Set camera position
    camera.position.set(CAMERA_OFFSET_X, CAMERA_OFFSET_Y, distance);

    // Store the initial camera Z position to control zoom properly
    if (initialCameraZ === null) {
        initialCameraZ = camera.position.z;  // Store this once during setup
    }

    camera.lookAt(new THREE.Vector3(0, 0, 0));

    // Update camera properties
    camera.updateProjectionMatrix();

    // Ensure the renderer fits the canvas size
    renderer.setSize(canvas.clientWidth, canvas.clientHeight);
}

function animate() {
    requestAnimationFrame(animate);

    if (mixer) {
        mixer.update(clock.getDelta());
    }

    if (AUTO_ROTATE) {
        rotationGroup.rotation.y += AUTO_ROTATE_SPEED;
    }

    renderer.render(scene, camera);
}

function resizeCanvas() {
    if (canvas && renderer && camera) {
        camera.aspect = canvas.clientWidth / canvas.clientHeight;
        camera.updateProjectionMatrix();

        renderer.setSize(canvas.clientWidth, canvas.clientHeight);

        if (model) {
            fitModelToCanvas();
        }
    }
}

function updateLoadingScreen(progress) {
    const progressText = document.getElementById('loading-progress');
    if (progressText) {
        progressText.textContent = `Loading 3D Model: ${Math.round(progress * 100)}%`;
    }
}

function hideLoadingScreen() {
    const loadingScreen = document.getElementById('loading-screen');
    if (loadingScreen) {
        loadingScreen.style.display = 'none';
    }
}

function startModelLoad() {
    const loadingManager = new THREE.LoadingManager();

    loadingManager.onProgress = function (url, itemsLoaded, itemsTotal) {
        updateLoadingScreen(itemsLoaded / itemsTotal);
    };

    loadingManager.onLoad = function () {
        hideLoadingScreen();
    };

    const loader = new THREE.GLTFLoader(loadingManager);

    loader.load(MODEL_URL, 
        function (gltf) {
            model = gltf.scene;
            rotationGroup.add(model);

            fitModelToCanvas();

            if (gltf.animations && gltf.animations.length) {
                mixer = new THREE.AnimationMixer(model);
                const animation = gltf.animations[0];
                const action = mixer.clipAction(animation);
                action.play();
            }

            animate(); // Start the animation loop
        },
        null, // Removed the console log for loading progress
        function (error) {
            console.error('An error occurred while loading the model:', error);
        }
    );
}

function initiateBackgroundLoading() {
    setupScene();
    startModelLoad();
}

let isDragging = false;
let isRightClick = false; // Flag for right-click movement
let previousMousePosition = { x: 0, y: 0 };

function onPointerDown(event) {
    isDragging = true;
    autoRotate = false; // Stop auto-rotation when dragging starts
    previousMousePosition = { x: event.clientX, y: event.clientY };

    if (event.button === 2) {
        isRightClick = true; // Right-click detected
    }
}

// Handle mouse movement (left-click for rotation, right-click for camera movement)
function onPointerMove(event) {
    if (!isDragging) return;

    const deltaMove = {
        x: event.clientX - previousMousePosition.x,
        y: event.clientY - previousMousePosition.y
    };

    const rotationSpeed = 0.005;
    const cameraMoveSpeed = 0.001;

    if (isRightClick) {
        // Right-click: Move camera horizontally (X axis) and vertically (Y axis)
        camera.position.x -= deltaMove.x * cameraMoveSpeed;
        camera.position.y += deltaMove.y * cameraMoveSpeed;  // Moving on Y-axis as before
    } else {
        // Left-click: Rotate the model
        rotationGroup.rotation.y += deltaMove.x * rotationSpeed;
        rotationGroup.rotation.x += deltaMove.y * rotationSpeed;
        rotationGroup.rotation.x = Math.max(-Math.PI / 2, Math.min(Math.PI / 2, rotationGroup.rotation.x)); // Limit vertical rotation
    }

    previousMousePosition = { x: event.clientX, y: event.clientY };
}

function onPointerUp() {
    isDragging = false;
    isRightClick = false; // Reset right-click flag
    autoRotate = true; // Resume auto-rotation when dragging stops
}
function zoom(event) {
    event.preventDefault();

    const zoomSpeed = 0.001;  // Slow down zoom for better control

    // Only modify the Z position from the initial distance, keeping the limits
    let newCameraZ = camera.position.z + event.deltaY * zoomSpeed;

    // Set zoom limits based on the initial camera position
    const minZoom = initialCameraZ * 0.01;  // You can tweak this value for the minimum zoom
    const maxZoom = initialCameraZ * 20;    // You can tweak this value for the maximum zoom

    // Apply the limits to the new Z position
    camera.position.z = Math.max(minZoom, Math.min(maxZoom, newCameraZ));

    camera.lookAt(new THREE.Vector3(0, 0, 0));  // Ensure the camera always focuses on the model center
    camera.updateProjectionMatrix();  // Update camera projection after zooming
}

// Initialize everything
initiateBackgroundLoading();
window.addEventListener('resize', resizeCanvas);
canvas.addEventListener('pointerdown', onPointerDown);
window.addEventListener('pointermove', onPointerMove);
window.addEventListener('pointerup', onPointerUp);
canvas.addEventListener('wheel', zoom);  // Add the zoom event listener

</script>