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