From 1deb0b2818611bf84b7ac74a21bd1aa530f96a57 Mon Sep 17 00:00:00 2001
From: Esguerra Montana <32esla1mpg@hft-stuttgart.de>
Date: Sun, 9 Jun 2024 17:25:36 +0000
Subject: [PATCH] Update index.html

---
 public/index.html | 65 ++++++++++++++++++++++++++++++++++-------------
 1 file changed, 48 insertions(+), 17 deletions(-)
diff --git a/public/index.html b/public/index.html
index c3759eb..7437a3c 100644
--- 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(0.5, 0.5, 0.5), 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 +106,23 @@ 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>
-- 
GitLab

