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- <!-- Licensed under a BSD license. See license.html for license -->
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
- <title>Three.js - WebXR - Look to Select (selection cursor)</title>
- <style>
- html, body {
- height: 100%;
- margin: 0;
- }
- #c {
- width: 100%;
- height: 100%;
- display: block;
- }
- </style>
- </head>
- <body>
- <canvas id="c"></canvas>
- </body>
- <script type="importmap">
- {
- "imports": {
- "three": "../../build/three.module.js"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- function main() {
- const canvas = document.querySelector( '#c' );
- const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
- const left = - 2; // Use values for left
- const right = 2; // right, top and bottom
- const top = 1; // that match the default
- const bottom = - 1; // canvas size.
- const near = - 1;
- const far = 1;
- const camera = new THREE.OrthographicCamera( left, right, top, bottom, near, far );
- function makeDataTexture( data, width, height ) {
- const texture = new THREE.DataTexture( data, width, height, THREE.RGBAFormat );
- texture.minFilter = THREE.NearestFilter;
- texture.magFilter = THREE.NearestFilter;
- texture.needsUpdate = true;
- return texture;
- }
- const backgroundColors = new Uint8Array( [
- 0, 0, 0, 255, // black
- 90, 38, 38, 255, // dark red
- 100, 175, 103, 255, // medium green
- 255, 239, 151, 255, // light yellow
- ] );
- const backgroundTexture = makeDataTexture( backgroundColors, 2, 2 );
- backgroundTexture.wrapS = THREE.RepeatWrapping;
- backgroundTexture.wrapT = THREE.RepeatWrapping;
- backgroundTexture.repeat.set( 4, 4 );
- const scene = new THREE.Scene();
- scene.background = backgroundTexture;
- //const innerRadius = 0.4;
- //const outerRadius = 0.5;
- //const segments = 64;
- //const cursorGeometry = new THREE.RingGeometry(
- // innerRadius, outerRadius, segments);
- const ringRadius = 0.4;
- const tubeRadius = 0.1;
- const tubeSegments = 4;
- const ringSegments = 64;
- const cursorGeometry = new THREE.TorusGeometry(
- ringRadius, tubeRadius, tubeSegments, ringSegments );
- const cursorColors = new Uint8Array( [
- 64, 64, 64, 64, // dark gray
- 255, 255, 255, 255, // white
- ] );
- const cursorTexture = makeDataTexture( cursorColors, 2, 1 );
- const cursorMaterial = new THREE.MeshBasicMaterial( {
- color: 'white',
- map: cursorTexture,
- transparent: true,
- blending: THREE.CustomBlending,
- blendSrc: THREE.OneMinusDstColorFactor,
- blendDst: THREE.OneMinusSrcColorFactor,
- } );
- const cursor = new THREE.Mesh( cursorGeometry, cursorMaterial );
- scene.add( cursor );
- function resizeRendererToDisplaySize( renderer ) {
- const canvas = renderer.domElement;
- const width = canvas.clientWidth;
- const height = canvas.clientHeight;
- const needResize = canvas.width !== width || canvas.height !== height;
- if ( needResize ) {
- renderer.setSize( width, height, false );
- }
- return needResize;
- }
- function render( time ) {
- time *= 0.001;
- if ( resizeRendererToDisplaySize( renderer ) ) {
- const canvas = renderer.domElement;
- const aspect = canvas.clientWidth / canvas.clientHeight;
- camera.left = - aspect;
- camera.right = aspect;
- camera.updateProjectionMatrix();
- }
- const fromStart = 0;
- const fromEnd = 2;
- const toStart = - 0.5;
- const toEnd = 0.5;
- cursorTexture.offset.x = THREE.MathUtils.mapLinear(
- time % 2,
- fromStart, fromEnd,
- toStart, toEnd );
- renderer.render( scene, camera );
- }
- renderer.setAnimationLoop( render );
- }
- main();
- </script>
- </html>
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