Update viewer.js

viewer.js

@@ -10,54 +10,28 @@ let minZoom, maxZoom, minAngle, maxAngle, minAzimuth, maxAzimuth, minPivotY, min
 let modelX, modelY, modelZ, modelScale, modelRotationX, modelRotationY, modelRotationZ;
 let sogsUrl, glbUrl, canvasBg;
 
-// -------------------- CORS PATCHER --------------------
-async function patchSogsJsonForCors(config) {
-    const originalMetaUrl = config.sogs_json_url;
-    const baseDir = originalMetaUrl.substring(0, originalMetaUrl.lastIndexOf('/') + 1);
-    // Use your own proxy for production; this public one is for dev/demo only
-    const corsPrefix = "https://corsproxy.io/?";
-    const resp = await fetch(originalMetaUrl);
-    if (!resp.ok) throw new Error("Failed to fetch meta.json");
-    const meta = await resp.json();
-    for (const key of Object.keys(meta)) {
-        if (meta[key].files) {
-            meta[key].files = meta[key].files.map(filename => {
-                let url = filename;
-                if (!filename.startsWith("http")) url = baseDir + filename;
-                return corsPrefix + url;
-            });
-        }
-    }
-    const metaBlob = new Blob([JSON.stringify(meta)], { type: "application/json" });
-    // Save blob URL for use in asset loader
-    config.sogs_json_url = URL.createObjectURL(metaBlob);
-}
-
-// ------------------------------------------------------
-
 function hexToRgbaArray(hex) {
-    try {
-        hex = hex.replace("#", "");
-        if (hex.length === 6) hex += "FF";
-        if (hex.length !== 8) return [1, 1, 1, 1];
-        const num = parseInt(hex, 16);
-        return [
-            ((num >> 24) & 0xFF) / 255,
-            ((num >> 16) & 0xFF) / 255,
-            ((num >> 8) & 0xFF) / 255,
-            (num & 0xFF) / 255
-        ];
-    } catch (e) {
-        return [1, 1, 1, 1];
-    }
+  try {
+    hex = hex.replace("#", "");
+    if (hex.length === 6) hex += "FF";
+    if (hex.length !== 8) return [1, 1, 1, 1];
+    const num = parseInt(hex, 16);
+    return [
+      ((num >> 24) & 0xFF) / 255,
+      ((num >> 16) & 0xFF) / 255,
+      ((num >> 8)  & 0xFF) / 255,
+      (num & 0xFF) / 255
+    ];
+  } catch (e) {
+    return [1, 1, 1, 1];
+  }
 }
 
-// This is not used for SOGS loading, but kept for completeness/legacy usage
 async function loadImageAsTexture(url, app) {
     return new Promise((resolve, reject) => {
         const img = new window.Image();
         img.crossOrigin = "anonymous";
-        img.onload = function () {
+        img.onload = function() {
             const tex = new pc.Texture(app.graphicsDevice, {
                 width: img.width,
                 height: img.height,
@@ -72,303 +46,301 @@ async function loadImageAsTexture(url, app) {
 }
 
 export async function initializeViewer(config, instanceId) {
-    // Patch SOGS meta.json for CORS (only needed for HuggingFace or remote dataset)
-    if (config.sogs_json_url && config.sogs_json_url.includes("huggingface.co")) {
-        await patchSogsJsonForCors(config);
-    }
 
-    const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
-    const isMobile = isIOS || /Android/i.test(navigator.userAgent);
+  const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
+  const isMobile = isIOS || /Android/i.test(navigator.userAgent);
+
+  try {
+    // Parse config
+    sogsUrl   = config.sogs_json_url;
+    glbUrl    = config.glb_url;
+    canvasBg  = config.canvas_background || "#ffffff";
+    minZoom   = parseFloat(config.minZoom || "1");
+    maxZoom   = parseFloat(config.maxZoom || "20");
+    minAngle  = parseFloat(config.minAngle || "-45");
+    maxAngle  = parseFloat(config.maxAngle || "90");
+    minAzimuth= (config.minAzimuth !== undefined) ? parseFloat(config.minAzimuth) : -360;
+    maxAzimuth= (config.maxAzimuth !== undefined) ? parseFloat(config.maxAzimuth) : 360;
+    minPivotY = parseFloat(config.minPivotY || "0");
+    minY      = (config.minY !== undefined) ? parseFloat(config.minY) : 0;
+
+    modelX          = (config.modelX !== undefined) ? parseFloat(config.modelX) : 0;
+    modelY          = (config.modelY !== undefined) ? parseFloat(config.modelY) : 0;
+    modelZ          = (config.modelZ !== undefined) ? parseFloat(config.modelZ) : 0;
+    modelScale      = (config.modelScale !== undefined) ? parseFloat(config.modelScale) : 1;
+    modelRotationX  = (config.modelRotationX !== undefined) ? parseFloat(config.modelRotationX) : 0;
+    modelRotationY  = (config.modelRotationY !== undefined) ? parseFloat(config.modelRotationY) : 0;
+    modelRotationZ  = (config.modelRotationZ !== undefined) ? parseFloat(config.modelRotationZ) : 0;
+
+    const cameraX      = (config.cameraX !== undefined) ? parseFloat(config.cameraX) : 0;
+    const cameraY      = (config.cameraY !== undefined) ? parseFloat(config.cameraY) : 2;
+    const cameraZ      = (config.cameraZ !== undefined) ? parseFloat(config.cameraZ) : 5;
+    const cameraXPhone = (config.cameraXPhone !== undefined) ? parseFloat(config.cameraXPhone) : cameraX;
+    const cameraYPhone = (config.cameraYPhone !== undefined) ? parseFloat(config.cameraYPhone) : cameraY;
+    const cameraZPhone = (config.cameraZPhone !== undefined) ? parseFloat(config.cameraZPhone) : (cameraZ * 1.5);
+
+    chosenCameraX = isMobile ? cameraXPhone : cameraX;
+    chosenCameraY = isMobile ? cameraYPhone : cameraY;
+    chosenCameraZ = isMobile ? cameraZPhone : cameraZ;
+
+    const canvasId         = 'canvas-' + instanceId;
+    const progressDialog   = document.getElementById('progress-dialog-' + instanceId);
+    const progressIndicator= document.getElementById('progress-indicator-' + instanceId);
+    const viewerContainer  = document.getElementById('viewer-container-' + instanceId);
+
+    let oldCanvas = document.getElementById(canvasId);
+    if (oldCanvas) oldCanvas.remove();
+
+    const canvas = document.createElement('canvas');
+    canvas.id = canvasId;
+    canvas.className = 'ply-canvas';
+    canvas.style.width = "100%";
+    canvas.style.height = "100%";
+    canvas.setAttribute('tabindex', '0');
+    viewerContainer.insertBefore(canvas, progressDialog);
+
+    // Apply background color from config if present
+    canvas.style.background = canvasBg;
+
+    canvas.style.touchAction = "none";
+    canvas.style.webkitTouchCallout = "none";
+    canvas.addEventListener('gesturestart', e => e.preventDefault());
+    canvas.addEventListener('gesturechange', e => e.preventDefault());
+    canvas.addEventListener('gestureend', e => e.preventDefault());
+    canvas.addEventListener('dblclick', e => e.preventDefault());
+    canvas.addEventListener('touchstart', e => { if (e.touches.length > 1) e.preventDefault(); }, { passive: false });
+
+    // --- Mouse wheel suppression
+    canvas.addEventListener('wheel', (e) => {
+      e.preventDefault(); // Only block page scroll if mouse is over viewer
+    }, { passive: false });
+
+    if (progressDialog) progressDialog.style.display = 'block';
+
+
+    if (!pc) {
+      pc = await import("https://cdn.jsdelivr.net/npm/playcanvas@latest/+esm");
+      window.pc = pc;
+    }
 
+    // Create app and graphics device
+    let device;
     try {
-        // Parse config
-        sogsUrl = config.sogs_json_url;
-        glbUrl = config.glb_url;
-        canvasBg = config.canvas_background || "#ffffff";
-        minZoom = parseFloat(config.minZoom || "1");
-        maxZoom = parseFloat(config.maxZoom || "20");
-        minAngle = parseFloat(config.minAngle || "-45");
-        maxAngle = parseFloat(config.maxAngle || "90");
-        minAzimuth = (config.minAzimuth !== undefined) ? parseFloat(config.minAzimuth) : -360;
-        maxAzimuth = (config.maxAzimuth !== undefined) ? parseFloat(config.maxAzimuth) : 360;
-        minPivotY = parseFloat(config.minPivotY || "0");
-        minY = (config.minY !== undefined) ? parseFloat(config.minY) : 0;
-
-        modelX = (config.modelX !== undefined) ? parseFloat(config.modelX) : 0;
-        modelY = (config.modelY !== undefined) ? parseFloat(config.modelY) : 0;
-        modelZ = (config.modelZ !== undefined) ? parseFloat(config.modelZ) : 0;
-        modelScale = (config.modelScale !== undefined) ? parseFloat(config.modelScale) : 1;
-        modelRotationX = (config.modelRotationX !== undefined) ? parseFloat(config.modelRotationX) : 0;
-        modelRotationY = (config.modelRotationY !== undefined) ? parseFloat(config.modelRotationY) : 0;
-        modelRotationZ = (config.modelRotationZ !== undefined) ? parseFloat(config.modelRotationZ) : 0;
-
-        const cameraX = (config.cameraX !== undefined) ? parseFloat(config.cameraX) : 0;
-        const cameraY = (config.cameraY !== undefined) ? parseFloat(config.cameraY) : 2;
-        const cameraZ = (config.cameraZ !== undefined) ? parseFloat(config.cameraZ) : 5;
-        const cameraXPhone = (config.cameraXPhone !== undefined) ? parseFloat(config.cameraXPhone) : cameraX;
-        const cameraYPhone = (config.cameraYPhone !== undefined) ? parseFloat(config.cameraYPhone) : cameraY;
-        const cameraZPhone = (config.cameraZPhone !== undefined) ? parseFloat(config.cameraZPhone) : (cameraZ * 1.5);
-
-        chosenCameraX = isMobile ? cameraXPhone : cameraX;
-        chosenCameraY = isMobile ? cameraYPhone : cameraY;
-        chosenCameraZ = isMobile ? cameraZPhone : cameraZ;
-
-        const canvasId = 'canvas-' + instanceId;
-        const progressDialog = document.getElementById('progress-dialog-' + instanceId);
-        const progressIndicator = document.getElementById('progress-indicator-' + instanceId);
-        const viewerContainer = document.getElementById('viewer-container-' + instanceId);
-
-        let oldCanvas = document.getElementById(canvasId);
-        if (oldCanvas) oldCanvas.remove();
-
-        const canvas = document.createElement('canvas');
-        canvas.id = canvasId;
-        canvas.className = 'ply-canvas';
-        canvas.style.width = "100%";
-        canvas.style.height = "100%";
-        canvas.setAttribute('tabindex', '0');
-        viewerContainer.insertBefore(canvas, progressDialog);
-
-        // Apply background color from config if present
-        canvas.style.background = canvasBg;
-
-        canvas.style.touchAction = "none";
-        canvas.style.webkitTouchCallout = "none";
-        canvas.addEventListener('gesturestart', e => e.preventDefault());
-        canvas.addEventListener('gesturechange', e => e.preventDefault());
-        canvas.addEventListener('gestureend', e => e.preventDefault());
-        canvas.addEventListener('dblclick', e => e.preventDefault());
-        canvas.addEventListener('touchstart', e => { if (e.touches.length > 1) e.preventDefault(); }, { passive: false });
-
-        // --- Mouse wheel suppression
-        canvas.addEventListener('wheel', (e) => {
-            e.preventDefault(); // Only block page scroll if mouse is over viewer
-        }, { passive: false });
-
-        if (progressDialog) progressDialog.style.display = 'block';
-
-        if (!pc) {
-            pc = await import("https://cdn.jsdelivr.net/npm/playcanvas@latest/+esm");
-            window.pc = pc;
-        }
+      device = await pc.createGraphicsDevice(canvas, {
+        deviceTypes: ["webgl2", "webgl1"],
+        glslangUrl: "https://mikafil-viewer-sgos.static.hf.space/static/lib/glslang/glslang.js",
+        twgslUrl:   "https://mikafil-viewer-sgos.static.hf.space/static/lib/twgsl/twgsl.js",
+        antialias: false
+      });
+      device.maxPixelRatio = Math.min(window.devicePixelRatio, 2);
+    } catch (e) {
+      throw e;
+    }
 
-        // Create app and graphics device
-        let device;
+    const opts = new pc.AppOptions();
+    opts.graphicsDevice = device;
+    opts.mouse = new pc.Mouse(canvas);
+    opts.touch = new pc.TouchDevice(canvas);
+    opts.componentSystems = [
+      pc.RenderComponentSystem,
+      pc.CameraComponentSystem,
+      pc.LightComponentSystem,
+      pc.ScriptComponentSystem,
+      pc.GSplatComponentSystem,
+      pc.CollisionComponentSystem,
+      pc.RigidbodyComponentSystem
+    ];
+    opts.resourceHandlers = [
+      pc.TextureHandler,
+      pc.ContainerHandler,
+      pc.ScriptHandler,
+      pc.GSplatHandler
+    ];
+
+    app = new pc.Application(canvas, opts);
+    app.setCanvasFillMode(pc.FILLMODE_NONE);
+    app.setCanvasResolution(pc.RESOLUTION_AUTO);
+
+
+    // Resizing
+    resizeObserver = new ResizeObserver(entries => {
+      entries.forEach(entry => {
         try {
-            device = await pc.createGraphicsDevice(canvas, {
-                deviceTypes: ["webgl2", "webgl1"],
-                glslangUrl: "https://mikafil-viewer-sgos.static.hf.space/static/lib/glslang/glslang.js",
-                twgslUrl: "https://mikafil-viewer-sgos.static.hf.space/static/lib/twgsl/twgsl.js",
-                antialias: false
-            });
-            device.maxPixelRatio = Math.min(window.devicePixelRatio, 2);
-        } catch (e) {
-            throw e;
-        }
+          app.resizeCanvas(entry.contentRect.width, entry.contentRect.height);
+        } catch (e) { }
+      });
+    });
+    resizeObserver.observe(viewerContainer);
 
-        const opts = new pc.AppOptions();
-        opts.graphicsDevice = device;
-        opts.mouse = new pc.Mouse(canvas);
-        opts.touch = new pc.TouchDevice(canvas);
-        opts.componentSystems = [
-            pc.RenderComponentSystem,
-            pc.CameraComponentSystem,
-            pc.LightComponentSystem,
-            pc.ScriptComponentSystem,
-            pc.GSplatComponentSystem,
-            pc.CollisionComponentSystem,
-            pc.RigidbodyComponentSystem
-        ];
-        opts.resourceHandlers = [
-            pc.TextureHandler,
-            pc.ContainerHandler,
-            pc.ScriptHandler,
-            pc.GSplatHandler
-        ];
-
-        app = new pc.Application(canvas, opts);
-        app.setCanvasFillMode(pc.FILLMODE_NONE);
-        app.setCanvasResolution(pc.RESOLUTION_AUTO);
-
-        // Resizing
-        resizeObserver = new ResizeObserver(entries => {
-            entries.forEach(entry => {
-                try {
-                    app.resizeCanvas(entry.contentRect.width, entry.contentRect.height);
-                } catch (e) { }
-            });
-        });
-        resizeObserver.observe(viewerContainer);
+    window.addEventListener('resize', () => {
+      try {
+        app.resizeCanvas(viewerContainer.clientWidth, viewerContainer.clientHeight);
+      } catch (e) { }
+    });
+    app.on('destroy', () => resizeObserver.disconnect());
 
-        window.addEventListener('resize', () => {
-            try {
-                app.resizeCanvas(viewerContainer.clientWidth, viewerContainer.clientHeight);
-            } catch (e) { }
-        });
-        app.on('destroy', () => resizeObserver.disconnect());
+    // Prepare asset loading (SOGS as 'gsplat')
+    const assets = {
+      sogs: new pc.Asset('gsplat', 'gsplat', { url: sogsUrl }),
+      orbit: new pc.Asset('script', 'script', { url: "https://mikafil-viewer-sgos.static.hf.space/orbit-camera.js" }),
+      glb: new pc.Asset('glb', 'container', { url: glbUrl }),
+    };
+    for (const key in assets) app.assets.add(assets[key]);
 
-        // Prepare asset loading (SOGS as 'gsplat')
-        const assets = {
-            sogs: new pc.Asset('gsplat', 'gsplat', { url: sogsUrl }),
-            orbit: new pc.Asset('script', 'script', { url: "https://mikafil-viewer-sgos.static.hf.space/orbit-camera.js" }),
-            glb: new pc.Asset('glb', 'container', { url: glbUrl }),
-        };
-        for (const key in assets) app.assets.add(assets[key]);
-
-        // Individual asset error listeners
-        assets.sogs.on('error', (err) => { });
-        assets.orbit.on('error', (err) => { });
-        if (assets.glb) assets.glb.on('error', (err) => { });
-
-        assets.sogs.ready(() => { });
-        assets.orbit.ready(() => { });
-        if (assets.glb) assets.glb.ready(() => { });
-
-        const loader = new pc.AssetListLoader(Object.values(assets), app.assets);
-
-        loader.on('error', (err) => { });
-
-        loader.load(() => {
-
-            try {
-                app.start();
-            } catch (e) {
-                throw e;
-            }
-
-            if (progressDialog) progressDialog.style.display = 'none';
-
-            // Add SOGS model
-            try {
-                modelEntity = new pc.Entity('model');
-                modelEntity.addComponent('gsplat', { asset: assets.sogs });
-                modelEntity.setLocalPosition(modelX, modelY, modelZ);
-                modelEntity.setLocalEulerAngles(modelRotationX, modelRotationY, modelRotationZ);
-                modelEntity.setLocalScale(modelScale, modelScale, modelScale);
-                app.root.addChild(modelEntity);
-            } catch (e) {
-                throw e;
-            }
-
-            // Add the GLB entity if provided
-            try {
-                if (assets.glb && assets.glb.resource && assets.glb.resource.instantiateRenderEntity) {
-                    const glbEntity = assets.glb.resource.instantiateRenderEntity();
-                    app.root.addChild(glbEntity);
-                }
-            } catch (e) { }
-
-            // CAMERA
-            try {
-                cameraEntity = new pc.Entity('camera');
-                // Support background color
-                let bg = [1, 1, 1, 1];
-                if (canvasBg && /^#?[0-9a-f]{6,8}$/i.test(canvasBg.replace("#", ""))) {
-                    bg = hexToRgbaArray(canvasBg);
-                }
-                cameraEntity.addComponent('camera', { clearColor: new pc.Color(bg[0], bg[1], bg[2], bg[3]) });
-                cameraEntity.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
-                cameraEntity.lookAt(modelEntity.getPosition());
-                cameraEntity.addComponent('script');
-
-                // Pass all attributes to Orbit Camera script
-                cameraEntity.script.create('orbitCamera', {
-                    attributes: {
-                        focusEntity: modelEntity,
-                        inertiaFactor: 0.2,
-                        distanceMax: maxZoom,
-                        distanceMin: minZoom,
-                        pitchAngleMax: maxAngle,
-                        pitchAngleMin: minAngle,
-                        yawAngleMax: maxAzimuth,
-                        yawAngleMin: minAzimuth,
-                        minY: minY,
-                        frameOnStart: false
-                    }
-                });
-                cameraEntity.script.create('orbitCameraInputMouse');
-                cameraEntity.script.create('orbitCameraInputTouch');
-                app.root.addChild(cameraEntity);
-
-            } catch (e) { }
-
-            try {
-                app.resizeCanvas(viewerContainer.clientWidth, viewerContainer.clientHeight);
-            } catch (e) { }
-
-            try {
-                app.once('update', () => resetViewerCamera());
-            } catch (e) { }
-
-            // Tooltips support (optional)
-            try {
-                if (config.tooltips_url) {
-                    import('https://mikafil-viewer-sgos.static.hf.space/tooltips.js').then(tooltipsModule => {
-                        tooltipsModule.initializeTooltips({
-                            app,
-                            cameraEntity,
-                            modelEntity,
-                            tooltipsUrl: config.tooltips_url,
-                            defaultVisible: !!config.showTooltipsDefault,
-                            moveDuration: config.tooltipMoveDuration || 0.6
-                        });
-                    }).catch(e => { });
-                }
-            } catch (e) { }
-
-            viewerInitialized = true;
-        });
+    // Individual asset error listeners
+    assets.sogs.on('error', (err) => { });
+    assets.orbit.on('error', (err) => { });
+    if (assets.glb) assets.glb.on('error', (err) => { });
 
-    } catch (e) {
+    assets.sogs.ready(() => { });
+    assets.orbit.ready(() => { });
+    if (assets.glb) assets.glb.ready(() => { });
+
+    const loader = new pc.AssetListLoader(Object.values(assets), app.assets);
+
+    loader.on('error', (err) => { });
+
+    loader.load(() => {
+
+      try {
+        app.start();
+      } catch (e) {
         throw e;
-    }
-}
+      }
+
+      if (progressDialog) progressDialog.style.display = 'none';
+
+      // Add SOGS model
+      try {
+        modelEntity = new pc.Entity('model');
+        modelEntity.addComponent('gsplat', { asset: assets.sogs });
+        modelEntity.setLocalPosition(modelX, modelY, modelZ);
+        modelEntity.setLocalEulerAngles(modelRotationX, modelRotationY, modelRotationZ);
+        modelEntity.setLocalScale(modelScale, modelScale, modelScale);
+        app.root.addChild(modelEntity);
+      } catch (e) {
+        throw e;
+      }
 
-// Resets the viewer camera (as in your PLY example)
-export function resetViewerCamera() {
-    try {
-        if (!cameraEntity || !modelEntity || !app) {
-            return;
+      // Add the GLB entity if provided
+      try {
+        if (assets.glb && assets.glb.resource && assets.glb.resource.instantiateRenderEntity) {
+          const glbEntity = assets.glb.resource.instantiateRenderEntity();
+          app.root.addChild(glbEntity);
         }
-        const orbitCam = cameraEntity.script.orbitCamera;
-        if (!orbitCam) {
-            return;
+      } catch (e) { }
+
+      // CAMERA
+      try {
+        cameraEntity = new pc.Entity('camera');
+        // Support background color
+        let bg = [1, 1, 1, 1];
+        if (canvasBg && /^#?[0-9a-f]{6,8}$/i.test(canvasBg.replace("#", ""))) {
+          bg = hexToRgbaArray(canvasBg);
         }
+        cameraEntity.addComponent('camera', { clearColor: new pc.Color(bg[0], bg[1], bg[2], bg[3]) });
+        cameraEntity.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
+        cameraEntity.lookAt(modelEntity.getPosition());
+        cameraEntity.addComponent('script');
+
+        // Pass all attributes to Orbit Camera script
+        cameraEntity.script.create('orbitCamera', {
+          attributes: {
+            focusEntity: modelEntity,
+            inertiaFactor: 0.2,
+            distanceMax: maxZoom,
+            distanceMin: minZoom,
+            pitchAngleMax: maxAngle,
+            pitchAngleMin: minAngle,
+            yawAngleMax: maxAzimuth,
+            yawAngleMin: minAzimuth,
+            minY: minY,
+            frameOnStart: false
+          }
+        });
+        cameraEntity.script.create('orbitCameraInputMouse');
+        cameraEntity.script.create('orbitCameraInputTouch');
+        app.root.addChild(cameraEntity);
+
+      } catch (e) { }
+
+      try {
+        app.resizeCanvas(viewerContainer.clientWidth, viewerContainer.clientHeight);
+      } catch (e) { }
+
+      try {
+        app.once('update', () => resetViewerCamera());
+      } catch (e) { }
+
+      // Tooltips support (optional)
+      try {
+        if (config.tooltips_url) {
+          import('https://mikafil-viewer-sgos.static.hf.space/tooltips.js').then(tooltipsModule => {
+            tooltipsModule.initializeTooltips({
+              app,
+              cameraEntity,
+              modelEntity,
+              tooltipsUrl: config.tooltips_url,
+              defaultVisible: !!config.showTooltipsDefault,
+              moveDuration: config.tooltipMoveDuration || 0.6
+            });
+          }).catch(e => { });
+        }
+      } catch (e) { }
 
-        const modelPos = modelEntity.getPosition();
-        const tempEnt = new pc.Entity();
-        tempEnt.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
-        tempEnt.lookAt(modelPos);
+      viewerInitialized = true;
+    });
 
-        const dist = new pc.Vec3().sub2(
-            new pc.Vec3(chosenCameraX, chosenCameraY, chosenCameraZ),
-            modelPos
-        ).length();
+  } catch (e) {
+    throw e;
+  }
+}
 
-        cameraEntity.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
-        cameraEntity.lookAt(modelPos);
-
-        orbitCam.pivotPoint = modelPos.clone();
-        orbitCam._targetDistance = dist;
-        orbitCam._distance = dist;
-
-        const rot = tempEnt.getRotation();
-        const fwd = new pc.Vec3();
-        rot.transformVector(pc.Vec3.FORWARD, fwd);
-
-        const yaw = Math.atan2(-fwd.x, -fwd.z) * pc.math.RAD_TO_DEG;
-        const yawQuat = new pc.Quat().setFromEulerAngles(0, -yaw, 0);
-        const rotNoYaw = new pc.Quat().mul2(yawQuat, rot);
-        const fNoYaw = new pc.Vec3();
-        rotNoYaw.transformVector(pc.Vec3.FORWARD, fNoYaw);
-        const pitch = Math.atan2(fNoYaw.y, -fNoYaw.z) * pc.math.RAD_TO_DEG;
-
-        orbitCam._targetYaw = yaw;
-        orbitCam._yaw = yaw;
-        orbitCam._targetPitch = pitch;
-        orbitCam._pitch = pitch;
-        if (orbitCam._updatePosition) orbitCam._updatePosition();
-
-        tempEnt.destroy();
-    } catch (e) { }
+// Resets the viewer camera (as in your PLY example)
+export function resetViewerCamera() {
+  try {
+    if (!cameraEntity || !modelEntity || !app) {
+      return;
+    }
+    const orbitCam = cameraEntity.script.orbitCamera;
+    if (!orbitCam) {
+      return;
+    }
+
+    const modelPos = modelEntity.getPosition();
+    const tempEnt = new pc.Entity();
+    tempEnt.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
+    tempEnt.lookAt(modelPos);
+
+    const dist = new pc.Vec3().sub2(
+      new pc.Vec3(chosenCameraX, chosenCameraY, chosenCameraZ),
+      modelPos
+    ).length();
+
+    cameraEntity.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
+    cameraEntity.lookAt(modelPos);
+
+    orbitCam.pivotPoint = modelPos.clone();
+    orbitCam._targetDistance = dist;
+    orbitCam._distance       = dist;
+
+    const rot = tempEnt.getRotation();
+    const fwd = new pc.Vec3();
+    rot.transformVector(pc.Vec3.FORWARD, fwd);
+
+    const yaw = Math.atan2(-fwd.x, -fwd.z) * pc.math.RAD_TO_DEG;
+    const yawQuat = new pc.Quat().setFromEulerAngles(0, -yaw, 0);
+    const rotNoYaw = new pc.Quat().mul2(yawQuat, rot);
+    const fNoYaw = new pc.Vec3();
+    rotNoYaw.transformVector(pc.Vec3.FORWARD, fNoYaw);
+    const pitch = Math.atan2(fNoYaw.y, -fNoYaw.z) * pc.math.RAD_TO_DEG;
+
+    orbitCam._targetYaw   = yaw;
+    orbitCam._yaw         = yaw;
+    orbitCam._targetPitch = pitch;
+    orbitCam._pitch       = pitch;
+    if (orbitCam._updatePosition) orbitCam._updatePosition();
+
+    tempEnt.destroy();
+  } catch (e) { }
 }