Update viewer.js

viewer.js

@@ -10,319 +10,365 @@ let minZoom, maxZoom, minAngle, maxAngle, minAzimuth, maxAzimuth, minPivotY, min
 let modelX, modelY, modelZ, modelScale, modelRotationX, modelRotationY, modelRotationZ;
 let sogsUrl, glbUrl, canvasBg;
 
-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];
-  }
+// -------------------- 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);
 }
 
-export async function initializeViewer(config, instanceId) {
+// ------------------------------------------------------
 
-  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;
+function hexToRgbaArray(hex) {
     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);
+        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) {
-      throw e;
+        return [1, 1, 1, 1];
     }
+}
 
-    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) { }
+// 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 () {
+            const tex = new pc.Texture(app.graphicsDevice, {
+                width: img.width,
+                height: img.height,
+                format: pc.PIXELFORMAT_R8_G8_B8_A8,
+            });
+            tex.setSource(img);
+            resolve(tex);
+        };
+        img.onerror = reject;
+        img.src = url;
     });
-    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]);
+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);
+    }
 
-    // Individual asset error listeners
-    assets.sogs.on('error', (err) => { });
-    assets.orbit.on('error', (err) => { });
-    if (assets.glb) assets.glb.on('error', (err) => { });
+    const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
+    const isMobile = isIOS || /Android/i.test(navigator.userAgent);
 
-    assets.sogs.ready(() => { });
-    assets.orbit.ready(() => { });
-    if (assets.glb) assets.glb.ready(() => { });
+    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;
+        }
 
-    const loader = new pc.AssetListLoader(Object.values(assets), app.assets);
+        // Create app and graphics device
+        let device;
+        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;
+        }
 
-    loader.on('error', (err) => { });
+        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);
 
-    loader.load(() => {
+        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]);
+
+        // 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;
+        });
 
-      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) {
+    } 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);
+// Resets the viewer camera (as in your PLY example)
+export function resetViewerCamera() {
+    try {
+        if (!cameraEntity || !modelEntity || !app) {
+            return;
         }
-        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 => { });
+        const orbitCam = cameraEntity.script.orbitCamera;
+        if (!orbitCam) {
+            return;
         }
-      } catch (e) { }
 
-      viewerInitialized = true;
-    });
+        const modelPos = modelEntity.getPosition();
+        const tempEnt = new pc.Entity();
+        tempEnt.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
+        tempEnt.lookAt(modelPos);
 
-  } catch (e) {
-    throw e;
-  }
-}
+        const dist = new pc.Vec3().sub2(
+            new pc.Vec3(chosenCameraX, chosenCameraY, chosenCameraZ),
+            modelPos
+        ).length();
 
-// 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) { }
+        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) { }
 }