Update index.html

4546c991 · Rushdi · e9bcd40e · 4546c991
Commit 4546c991 authored Jun 20, 2023 by Rushdi
--- a/public/index.html
+++ b/public/index.html
 <!doctype html>
 <html>
 <head>
@@ -21,37 +22,76 @@ async function activateXR() {
  document.body.appendChild(canvas);
  const gl = canvas.getContext("webgl", {xrCompatible: true});
-  // To be continued in upcoming steps.
+  const scene = new THREE.Scene();
-    const scene = new THREE.Scene();
+// The cube will have a different color on each side.
-  // The cube will have a different color on each side.
+const materials = [
-  const materials = [
+  new THREE.MeshBasicMaterial({color: 0xff0000}),
-    new THREE.MeshBasicMaterial({color: 0xff0000}),
+  new THREE.MeshBasicMaterial({color: 0x0000ff}),
-    new THREE.MeshBasicMaterial({color: 0x0000ff}),
+  new THREE.MeshBasicMaterial({color: 0x00ff00}),
-    new THREE.MeshBasicMaterial({color: 0x00ff00}),
+  new THREE.MeshBasicMaterial({color: 0xff00ff}),
-    new THREE.MeshBasicMaterial({color: 0xff00ff}),
+  new THREE.MeshBasicMaterial({color: 0x00ffff}),
-    new THREE.MeshBasicMaterial({color: 0x00ffff}),
+  new THREE.MeshBasicMaterial({color: 0xffff00})
-    new THREE.MeshBasicMaterial({color: 0xffff00})
+];
-  ];
+// Create the cube and add it to the demo scene.
-  // Create the cube and add it to the demo scene.
+const cube = new THREE.Mesh(new THREE.BoxBufferGeometry(0.5, 0.5, 0.5), materials);
-  const cube = new THREE.Mesh(new THREE.BoxBufferGeometry(0.2, 0.2, 0.2), materials);
+cube.position.set(0, 0, -1);
-  cube.position.set(1, 1, 1);
+scene.add(cube);
-  scene.add(cube);
-  // Set up the WebGLRenderer, which handles rendering to the session's base layer.
+// Set up the WebGLRenderer, which handles rendering to the session's base layer.
-  const renderer = new THREE.WebGLRenderer({
+const renderer = new THREE.WebGLRenderer({
-    alpha: true,
+  alpha: true,
-    preserveDrawingBuffer: true,
+  preserveDrawingBuffer: true,
-    canvas: canvas,
+  canvas: canvas,
-    context: gl
+  context: gl
-  });
+});
-  renderer.autoClear = false;
+renderer.autoClear = false;
-  // The API directly updates the camera matrices.
+// The API directly updates the camera matrices.
-  // Disable matrix auto updates so three.js doesn't attempt
+// Disable matrix auto updates so three.js doesn't attempt
-  // to handle the matrices independently.
+// to handle the matrices independently.
-  const camera = new THREE.PerspectiveCamera();
+const camera = new THREE.PerspectiveCamera();
-  camera.matrixAutoUpdate = false;
+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);
 }
 </script>