Update public/index.html

73750e2f · Karakas · 8a62fc35 · 73750e2f
Commit 73750e2f authored Nov 23, 2023 by Karakas
--- a/public/index.html
+++ b/public/index.html
@@ -4,16 +4,18 @@
  <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>Cube Demo</title>
+  <title>Hit to Place Demo</title>

  <!-- three.js -->
  <script src="https://unpkg.com/three@0.126.0/build/three.js"></script>
+
+  <script src="https://unpkg.com/three@0.126.0/examples/js/loaders/GLTFLoader.js"></script>
 </head>
 <body>

 <!-- Starting an immersive WebXR session requires user interaction.
    We start this one with a simple button. -->
-<button onclick="activateXR()">Start Cube Demo</button>
+<button onclick="activateXR()">Start Hit to Place Demo</button>
 <script>
 async function activateXR() {
  // Add a canvas element and initialize a WebGL context that is compatible with WebXR.
@@ -23,20 +25,9 @@ async function activateXR() {

  const scene = new THREE.Scene();

-// The cube will have a different color on each side.
-const materials = [
-  new THREE.MeshBasicMaterial({color: 0xff0000}),
-  new THREE.MeshBasicMaterial({color: 0x0000ff}),
-  new THREE.MeshBasicMaterial({color: 0x00ff00}),
-  new THREE.MeshBasicMaterial({color: 0xff00ff}),
-  new THREE.MeshBasicMaterial({color: 0x00ffff}),
-  new THREE.MeshBasicMaterial({color: 0xffff00})
-];
-
-// Create the cube and add it to the demo scene.
-const cube = new THREE.Mesh(new THREE.BoxBufferGeometry(0.2, 0.2, 0.2), materials);
-cube.position.set(0, 0, -1);
-scene.add(cube);
+  const directionalLight = new THREE.DirectionalLight(0xffffff, 1.0);
+  directionalLight.position.set(10, 15, 10);
+  scene.add(directionalLight);

 // Set up the WebGLRenderer, which handles rendering to the session's base layer.
 const renderer = new THREE.WebGLRenderer({
@@ -54,7 +45,7 @@ const camera = new THREE.PerspectiveCamera();
 camera.matrixAutoUpdate = false;

 // Initialize a WebXR session using "immersive-ar".
-const session = await navigator.xr.requestSession("immersive-ar");
+const session = await navigator.xr.requestSession("immersive-ar", {requiredFeatures: ['hit-test']});
 session.updateRenderState({
  baseLayer: new XRWebGLLayer(session, gl)
 });
@@ -63,6 +54,35 @@ session.updateRenderState({
 // near the viewer's position at the time the session was created.
 const referenceSpace = await session.requestReferenceSpace('local');

+// Create another XRReferenceSpace that has the viewer as the origin.
+const viewerSpace = await session.requestReferenceSpace('viewer');
+// Perform hit testing using the viewer as origin.
+const hitTestSource = await session.requestHitTestSource({ space: viewerSpace });
+
+
+
+
+const loader = new THREE.GLTFLoader();
+let reticle;
+loader.load("https://immersive-web.github.io/webxr-samples/media/gltf/reticle/reticle.gltf", function(gltf) {
+  reticle = gltf.scene;
+  reticle.visible = false;
+  scene.add(reticle);
+})
+
+let flower;
+loader.load("https://immersive-web.github.io/webxr-samples/media/gltf/sunflower/sunflower.gltf", function(gltf) {
+  flower = gltf.scene;
+});
+
+session.addEventListener("select", (event) => {
+  if (flower) {
+    const clone = flower.clone();
+    clone.position.copy(reticle.position);
+    scene.add(clone);
+  }
+});
+
 // Create a render loop that allows us to draw on the AR view.
 const onXRFrame = (time, frame) => {
  // Queue up the next draw request.
@@ -86,12 +106,25 @@ const onXRFrame = (time, frame) => {
    camera.projectionMatrix.fromArray(view.projectionMatrix);
    camera.updateMatrixWorld(true);

+    const hitTestResults = frame.getHitTestResults(hitTestSource);
+    if (hitTestResults.length > 0 && reticle) {
+      const hitPose = hitTestResults[0].getPose(referenceSpace);
+      reticle.visible = true;
+      reticle.position.set(hitPose.transform.position.x, hitPose.transform.position.y, hitPose.transform.position.z)
+      reticle.updateMatrixWorld(true);
+    }
+
+    
+
    // Render the scene with THREE.WebGLRenderer.
    renderer.render(scene, camera)
  }
 }
 session.requestAnimationFrame(onXRFrame);

+
+
+
 }
 </script>
 </body>