Update index.html

public/index.html

@@ -4,7 +4,7 @@
   <meta charset="UTF-8">
   <meta name="viewport"
         content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
-  <title>Torus Demo</title>
+  <title>Tetrahedron Demo</title>
 
   <!-- three.js -->
   <script src="https://unpkg.com/three@0.126.0/build/three.js"></script>
@@ -13,7 +13,7 @@
 
 <!-- Starting an immersive WebXR session requires user interaction.
     We start this one with a simple button. -->
-<button onclick="activateXR()">Start Torus</button>
+<button onclick="activateXR()">Start Tetrahedron</button>
 <script>
 async function activateXR() {
   // Add a canvas element and initialize a WebGL context that is compatible with WebXR.
@@ -23,70 +23,79 @@ async function activateXR() {
 
   const scene = new THREE.Scene();
 
-// Color of the torus geometry.
-const material = new THREE.MeshPhysicalMaterial({ color: 0xff0000, roughness: 0.5, metalness: 0.5, clearcoat: 1.0, clearcoatRoughness: 0.1 });
-
-// Create the torus and add it to the demo scene.
-const torus = new THREE.Mesh( new THREE.TetrahedronGeometry(1), material);
-//position the next geometry (sphere)
-torus.position.set(0, 0, -1);
-// Add the mesh to the scene
-scene.add( torus );
-
-// Set up the WebGLRenderer, which handles rendering to the session's base layer.
-const renderer = new THREE.WebGLRenderer({
-  alpha: true,
-  preserveDrawingBuffer: true,
-  canvas: canvas,
-  context: gl
-});
-renderer.autoClear = false;
-
-// The API directly updates the camera matrices.
-// Disable matrix auto updates so three.js doesn't attempt
-// to handle the matrices independently.
-const camera = new THREE.PerspectiveCamera();
-camera.matrixAutoUpdate = false;
-
-// Initialize a WebXR session using "immersive-ar".
-const session = await navigator.xr.requestSession("immersive-ar");
-session.updateRenderState({
-  baseLayer: new XRWebGLLayer(session, gl)
-});
-
-// A 'local' reference space has a native origin that is located
-// near the viewer's position at the time the session was created.
-const referenceSpace = await session.requestReferenceSpace('local');
-
-// Create a render loop that allows us to draw on the AR view.
-const onXRFrame = (time, frame) => {
-  // Queue up the next draw request.
+  // Add lighting to the scene
+  const light = new THREE.DirectionalLight(0xffffff, 1);
+  light.position.set(1, 1, 1).normalize();
+  scene.add(light);
+
+  const ambientLight = new THREE.AmbientLight(0x404040); // soft white light
+  scene.add(ambientLight);
+
+  // Color of the tetrahedron geometry.
+  const material = new THREE.MeshPhysicalMaterial({ color: 0xff0000, roughness: 0.5, metalness: 0.5, clearcoat: 1.0, clearcoatRoughness: 0.1 });
+
+  // Create the tetrahedron and add it to the demo scene.
+  const tetrahedron = new THREE.Mesh(new THREE.TetrahedronGeometry(1), material);
+  
+  // Position the tetrahedron
+  tetrahedron.position.set(0, 0, -1);
+
+  // Add the mesh to the scene
+  scene.add(tetrahedron);
+
+  // Set up the WebGLRenderer, which handles rendering to the session's base layer.
+  const renderer = new THREE.WebGLRenderer({
+    alpha: true,
+    preserveDrawingBuffer: true,
+    canvas: canvas,
+    context: gl
+  });
+  renderer.autoClear = false;
+
+  // The API directly updates the camera matrices.
+  // Disable matrix auto updates so three.js doesn't attempt
+  // to handle the matrices independently.
+  const camera = new THREE.PerspectiveCamera();
+  camera.matrixAutoUpdate = false;
+
+  // Initialize a WebXR session using "immersive-ar".
+  const session = await navigator.xr.requestSession("immersive-ar");
+  session.updateRenderState({
+    baseLayer: new XRWebGLLayer(session, gl)
+  });
+
+  // A 'local' reference space has a native origin that is located
+  // near the viewer's position at the time the session was created.
+  const referenceSpace = await session.requestReferenceSpace('local');
+
+  // Create a render loop that allows us to draw on the AR view.
+  const onXRFrame = (time, frame) => {
+    // Queue up the next draw request.
+    session.requestAnimationFrame(onXRFrame);
+
+    // Bind the graphics framebuffer to the baseLayer's framebuffer
+    gl.bindFramebuffer(gl.FRAMEBUFFER, session.renderState.baseLayer.framebuffer);
+
+    // Retrieve the pose of the device.
+    // XRFrame.getViewerPose can return null while the session attempts to establish tracking.
+    const pose = frame.getViewerPose(referenceSpace);
+    if (pose) {
+      // In mobile AR, we only have one view.
+      const view = pose.views[0];
+
+      const viewport = session.renderState.baseLayer.getViewport(view);
+      renderer.setSize(viewport.width, viewport.height);
+
+      // Use the view's transform matrix and projection matrix to configure the THREE.camera.
+      camera.matrix.fromArray(view.transform.matrix);
+      camera.projectionMatrix.fromArray(view.projectionMatrix);
+      camera.updateMatrixWorld(true);
+
+      // Render the scene with THREE.WebGLRenderer.
+      renderer.render(scene, camera);
+    }
+  };
   session.requestAnimationFrame(onXRFrame);
-
-  // Bind the graphics framebuffer to the baseLayer's framebuffer
-  gl.bindFramebuffer(gl.FRAMEBUFFER, session.renderState.baseLayer.framebuffer)
-
-  // Retrieve the pose of the device.
-  // XRFrame.getViewerPose can return null while the session attempts to establish tracking.
-  const pose = frame.getViewerPose(referenceSpace);
-  if (pose) {
-    // In mobile AR, we only have one view.
-    const view = pose.views[0];
-
-    const viewport = session.renderState.baseLayer.getViewport(view);
-    renderer.setSize(viewport.width, viewport.height)
-
-    // Use the view's transform matrix and projection matrix to configure the THREE.camera.
-    camera.matrix.fromArray(view.transform.matrix)
-    camera.projectionMatrix.fromArray(view.projectionMatrix);
-    camera.updateMatrixWorld(true);
-
-    // Render the scene with THREE.WebGLRenderer.
-    renderer.render(scene, camera)
-  }
-}
-session.requestAnimationFrame(onXRFrame);
-
 }
 </script>
 </body>