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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js - kinect</title>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
- <link type="text/css" rel="stylesheet" href="main.css">
- </head>
- <body>
- <video id="video" loop muted crossOrigin="anonymous" playsinline style="display:none">
- <source src="textures/kinect.webm">
- <source src="textures/kinect.mp4">
- </video>
- <script id="vs" type="x-shader/x-vertex">
- uniform sampler2D map;
- uniform float width;
- uniform float height;
- uniform float nearClipping, farClipping;
- uniform float pointSize;
- uniform float zOffset;
- varying vec2 vUv;
- const float XtoZ = 1.11146; // tan( 1.0144686 / 2.0 ) * 2.0;
- const float YtoZ = 0.83359; // tan( 0.7898090 / 2.0 ) * 2.0;
- void main() {
- vUv = vec2( position.x / width, position.y / height );
- vec4 color = texture2D( map, vUv );
- float depth = ( color.r + color.g + color.b ) / 3.0;
- // Projection code by @kcmic
- float z = ( 1.0 - depth ) * (farClipping - nearClipping) + nearClipping;
- vec4 pos = vec4(
- ( position.x / width - 0.5 ) * z * XtoZ,
- ( position.y / height - 0.5 ) * z * YtoZ,
- - z + zOffset,
- 1.0);
- gl_PointSize = pointSize;
- gl_Position = projectionMatrix * modelViewMatrix * pos;
- }
- </script>
- <script id="fs" type="x-shader/x-fragment">
- uniform sampler2D map;
- varying vec2 vUv;
- void main() {
- vec4 color = texture2D( map, vUv );
- gl_FragColor = vec4( color.r, color.g, color.b, 0.2 );
- }
- </script>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- let scene, camera, renderer;
- let geometry, mesh, material;
- let mouse, center;
- init();
- function init() {
- const container = document.createElement( 'div' );
- document.body.appendChild( container );
- const info = document.createElement( 'div' );
- info.id = 'info';
- info.innerHTML = '<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - kinect';
- document.body.appendChild( info );
- camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 10000 );
- camera.position.set( 0, 0, 500 );
- scene = new THREE.Scene();
- center = new THREE.Vector3();
- center.z = - 1000;
- const video = document.getElementById( 'video' );
- const texture = new THREE.VideoTexture( video );
- texture.minFilter = THREE.NearestFilter;
- const width = 640, height = 480;
- const nearClipping = 850, farClipping = 4000;
- geometry = new THREE.BufferGeometry();
- const vertices = new Float32Array( width * height * 3 );
- for ( let i = 0, j = 0, l = vertices.length; i < l; i += 3, j ++ ) {
- vertices[ i ] = j % width;
- vertices[ i + 1 ] = Math.floor( j / width );
- }
- geometry.setAttribute( 'position', new THREE.BufferAttribute( vertices, 3 ) );
- material = new THREE.ShaderMaterial( {
- uniforms: {
- 'map': { value: texture },
- 'width': { value: width },
- 'height': { value: height },
- 'nearClipping': { value: nearClipping },
- 'farClipping': { value: farClipping },
- 'pointSize': { value: 2 },
- 'zOffset': { value: 1000 }
- },
- vertexShader: document.getElementById( 'vs' ).textContent,
- fragmentShader: document.getElementById( 'fs' ).textContent,
- blending: THREE.AdditiveBlending,
- depthTest: false, depthWrite: false,
- transparent: true
- } );
- mesh = new THREE.Points( geometry, material );
- scene.add( mesh );
- const gui = new GUI();
- gui.add( material.uniforms.nearClipping, 'value', 1, 10000, 1.0 ).name( 'nearClipping' );
- gui.add( material.uniforms.farClipping, 'value', 1, 10000, 1.0 ).name( 'farClipping' );
- gui.add( material.uniforms.pointSize, 'value', 1, 10, 1.0 ).name( 'pointSize' );
- gui.add( material.uniforms.zOffset, 'value', 0, 4000, 1.0 ).name( 'zOffset' );
- video.play();
- //
- renderer = new THREE.WebGLRenderer();
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- container.appendChild( renderer.domElement );
- mouse = new THREE.Vector3( 0, 0, 1 );
- document.addEventListener( 'mousemove', onDocumentMouseMove );
- //
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function onDocumentMouseMove( event ) {
- mouse.x = ( event.clientX - window.innerWidth / 2 ) * 8;
- mouse.y = ( event.clientY - window.innerHeight / 2 ) * 8;
- }
- function animate() {
- camera.position.x += ( mouse.x - camera.position.x ) * 0.05;
- camera.position.y += ( - mouse.y - camera.position.y ) * 0.05;
- camera.lookAt( center );
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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