An error occurred while loading the file. Please try again.
-
Esguerra Montana authoredd2d44074
<!doctype html><html><head> <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> <!-- three.js --> <script src="https://unpkg.com/three@0.126.0/build/three.js"></script></head><body><!-- Starting an immersive WebXR session requires user interaction. We start this one with a simple button. --><button onclick="activateXR()">Start Torus</button><script>async function activateXR() { // Add a canvas element and initialize a WebGL context that is compatible with WebXR. const canvas = document.createElement("canvas"); document.body.appendChild(canvas); const gl = canvas.getContext("webgl", {xrCompatible: true}); const scene = new THREE.Scene();// Define the vertices var vertices = new Float32Array([ -1.0, 0.0, 1.0, // P0 1.0, 0.0, 1.0, // P1 1.0, 0.0, -1.0, // P2 -1.0, 0.0, -1.0, // P3 -1.0, 2.0, 1.0, // P4 1.0, 2.0, 1.0, // P5 1.0, 2.0, -1.0, // P6 -1.0, 2.0, -1.0, // P7 0.0, 3.0, 0.0 // P8 ]); // Define the indices for the walls var wallIndices = new Uint16Array([ 0, 1, 5, 0, 5, 4, // Front face 1, 2, 6, 1, 6, 5, // Right face 2, 3, 7, 2, 7, 6, // Back face 3, 0, 4, 3, 4, 7, // Left face 4, 5, 6, 4, 6, 7 // Top face ]); // Define the indices for the roof var roofIndices = new Uint16Array([ 4, 5, 8, // Front roof face 5, 6, 8, // Right roof face 6, 7, 8, // Back roof face 7, 4, 8 // Left roof face ]); // Create the wall geometry var wallGeometry = new THREE.BufferGeometry(); wallGeometry.setAttribute('position', new THREE.BufferAttribute(vertices, 3)); wallGeometry.setIndex(new THREE.BufferAttribute(wallIndices, 1)); // Create the roof geometry var roofGeometry = new THREE.BufferGeometry(); roofGeometry.setAttribute('position', new THREE.BufferAttribute(vertices, 3)); roofGeometry.setIndex(new THREE.BufferAttribute(roofIndices, 1)); // Create materials for walls and roof var wallMaterial = new THREE.MeshBasicMaterial({ color: 0x8B4513, side: THREE.DoubleSide }); var roofMaterial = new THREE.MeshBasicMaterial({ color: 0xFF0000, side: THREE.DoubleSide }); // Create the wall and roof meshes
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
var wallMesh = new THREE.Mesh(wallGeometry, wallMaterial);
var roofMesh = new THREE.Mesh(roofGeometry, roofMaterial);
// Add the meshes to the scene
scene.add(wallMesh);
scene.add(roofMesh);
// Render the scene
function animate() {
requestAnimationFrame(animate);
wallMesh.rotation.y += 0.01;
roofMesh.rotation.y += 0.01;
renderer.render(scene, camera);
}
animate();
// 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);