From d5394dad4372365c445064b903d77d05104c52ef Mon Sep 17 00:00:00 2001
From: Percen <21pesi1bif@hft-stuttgart.de>
Date: Wed, 1 Jan 2025 20:29:47 +0000
Subject: [PATCH] Update public/index.html

---
 public/index.html | 156 +++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 154 insertions(+), 2 deletions(-)

diff --git a/public/index.html b/public/index.html
index 5ccad93..99d4d9a 100644
--- a/public/index.html
+++ b/public/index.html
@@ -163,8 +163,160 @@
     </div>
   </div>
   <script>
-    let currentSession = null;
-    // Restlicher Code siehe oben
+    let selectedModel = 'robot'; // Start mit dem Roboter
+    let models = {};
+    let reticle;
+    let lastClickTime = 0; // Zeit des letzten Klicks
+    const doubleClickThreshold = 300; // Zeitspanne für Doppelklick in Millisekunden
+
+    function updateMenu() {
+      document.querySelectorAll('.menu-item').forEach(item => item.classList.remove('active'));
+      document.getElementById(`${selectedModel}-item`).classList.add('active');
+    }
+
+    function selectModel(modelId) {
+      selectedModel = modelId;
+      console.log(`Modell ausgewählt: ${selectedModel}`);
+      updateMenu();
+    }
+
+    async function activateXR() {
+      const canvas = document.createElement('canvas');
+      document.body.appendChild(canvas);
+      const gl = canvas.getContext('webgl', { xrCompatible: true });
+      const renderer = new THREE.WebGLRenderer({ alpha: true, canvas, context: gl });
+      renderer.autoClear = false;
+
+      const scene = new THREE.Scene();
+      const camera = new THREE.PerspectiveCamera();
+      camera.matrixAutoUpdate = false;
+
+      // Licht hinzufügen
+      const light = new THREE.DirectionalLight(0xffffff, 1);
+      light.position.set(10, 10, 10);
+      scene.add(light);
+
+      // Reticle (Cursor)
+      const loader = new THREE.GLTFLoader();
+      loader.load("https://immersive-web.github.io/webxr-samples/media/gltf/reticle/reticle.gltf", (gltf) => {
+        reticle = gltf.scene;
+        reticle.visible = false;
+        scene.add(reticle);
+      });
+
+      // Modelle laden
+      loader.load("https://threejs.org/examples/models/gltf/RobotExpressive/RobotExpressive.glb", (gltf) => {
+        models.robot = gltf.scene;
+      });
+      loader.load("https://immersive-web.github.io/webxr-samples/media/gltf/sunflower/sunflower.gltf", (gltf) => {
+        models.sunflower = gltf.scene;
+      });
+
+      // AR-Session starten
+      const session = await navigator.xr.requestSession('immersive-ar', {
+        optionalFeatures: ["dom-overlay"],
+        domOverlay: { root: document.body },
+        requiredFeatures: ['hit-test']
+      });
+      session.updateRenderState({ baseLayer: new XRWebGLLayer(session, gl) });
+      const referenceSpace = await session.requestReferenceSpace('local');
+      const viewerSpace = await session.requestReferenceSpace('viewer');
+      const hitTestSource = await session.requestHitTestSource({ space: viewerSpace });
+
+      // Menü sichtbar machen, wenn die AR-Session gestartet wird
+      document.getElementById('menu-bar').style.display = 'flex';
+
+      session.requestAnimationFrame(onXRFrame);
+
+      session.addEventListener("select", (event) => {
+        if (!reticle) return;
+
+        // Prüfen, ob es ein Doppelklick ist
+        const currentTime = Date.now();
+        const timeDiff = currentTime - lastClickTime;
+
+        if (timeDiff < doubleClickThreshold) {
+          // Doppelklick erkannt, Modell wechseln
+          selectedModel = selectedModel === 'robot' ? 'sunflower' : 'robot';
+          console.log(`${selectedModel.charAt(0).toUpperCase() + selectedModel.slice(1)} ausgewählt`);
+          updateMenu();
+        } else {
+          // Einzelner Klick – Modell platzieren
+          if (models[selectedModel]) {
+            const clone = models[selectedModel].clone();
+            clone.position.copy(reticle.position);
+            clone.scale.set(0.5, 0.5, 0.5); // Größe anpassen
+            scene.add(clone);
+            console.log(`${selectedModel} platziert`);
+          }
+        }
+
+        // Zeit des letzten Klicks aktualisieren
+        lastClickTime = currentTime;
+      });
+
+      session.addEventListener("end", () => {
+        console.log("AR-Session beendet");
+        currentSession = null;
+        document.getElementById('menu-bar').style.display = 'none'; // Menü ausblenden
+      });
+
+      // AR-Rendering
+      function onXRFrame(time, frame) {
+        session.requestAnimationFrame(onXRFrame);
+        gl.bindFramebuffer(gl.FRAMEBUFFER, session.renderState.baseLayer.framebuffer);
+
+        const pose = frame.getViewerPose(referenceSpace);
+        if (pose) {
+          const view = pose.views[0];
+          const viewport = session.renderState.baseLayer.getViewport(view);
+          renderer.setSize(viewport.width, viewport.height);
+
+          camera.matrix.fromArray(view.transform.matrix);
+          camera.projectionMatrix.fromArray(view.projectionMatrix);
+          camera.updateMatrixWorld(true);
+
+          // Reticle Position
+          const hitTestResults = frame.getHitTestResults(hitTestSource);
+          if (hitTestResults.length > 0) {
+            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);
+          }
+
+          renderer.render(scene, camera);
+        }
+      }
+    }
+
+    function exitAR() {
+      document.getElementById('confirmation-dialog').style.display = 'flex'; // Dialog anzeigen
+    }
+
+    function confirmExit(shouldExit) {
+      if (shouldExit) {
+        if (currentSession) {
+          currentSession.end(); // Beende die AR-Session
+        }
+      }
+      document.getElementById('confirmation-dialog').style.display = 'none'; // Dialog ausblenden
+    }
+
+    // AR starten
+    if (navigator.xr) {
+      const startButton = document.createElement('button');
+      startButton.textContent = 'Start AR';
+      startButton.style.cssText = "position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); padding: 15px; font-size: 18px;";
+      document.body.appendChild(startButton);
+      startButton.onclick = () => {
+        startButton.remove();
+        activateXR();
+      };
+    } else {
+      alert('WebXR wird nicht unterstützt.');
+    }
+
   </script>
 </body>
 
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