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222 lines
5.4 KiB
222 lines
5.4 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js - kinect</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<video id="video" loop muted crossOrigin="anonymous" playsinline style="display:none">
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<source src="textures/kinect.webm">
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<source src="textures/kinect.mp4">
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</video>
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<script id="vs" type="x-shader/x-vertex">
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uniform sampler2D map;
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uniform float width;
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uniform float height;
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uniform float nearClipping, farClipping;
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uniform float pointSize;
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uniform float zOffset;
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varying vec2 vUv;
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const float XtoZ = 1.11146; // tan( 1.0144686 / 2.0 ) * 2.0;
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const float YtoZ = 0.83359; // tan( 0.7898090 / 2.0 ) * 2.0;
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void main() {
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vUv = vec2( position.x / width, position.y / height );
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vec4 color = texture2D( map, vUv );
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float depth = ( color.r + color.g + color.b ) / 3.0;
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// Projection code by @kcmic
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float z = ( 1.0 - depth ) * (farClipping - nearClipping) + nearClipping;
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vec4 pos = vec4(
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( position.x / width - 0.5 ) * z * XtoZ,
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( position.y / height - 0.5 ) * z * YtoZ,
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- z + zOffset,
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1.0);
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gl_PointSize = pointSize;
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gl_Position = projectionMatrix * modelViewMatrix * pos;
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}
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</script>
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<script id="fs" type="x-shader/x-fragment">
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uniform sampler2D map;
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varying vec2 vUv;
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void main() {
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vec4 color = texture2D( map, vUv );
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gl_FragColor = vec4( color.r, color.g, color.b, 0.2 );
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}
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</script>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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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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"three/addons/": "./jsm/"
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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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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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let scene, camera, renderer;
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let geometry, mesh, material;
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let mouse, center;
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init();
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animate();
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function init() {
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const container = document.createElement( 'div' );
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document.body.appendChild( container );
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const info = document.createElement( 'div' );
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info.id = 'info';
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info.innerHTML = '<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - kinect';
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document.body.appendChild( info );
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camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 10000 );
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camera.position.set( 0, 0, 500 );
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scene = new THREE.Scene();
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center = new THREE.Vector3();
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center.z = - 1000;
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const video = document.getElementById( 'video' );
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const texture = new THREE.VideoTexture( video );
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texture.minFilter = THREE.NearestFilter;
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const width = 640, height = 480;
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const nearClipping = 850, farClipping = 4000;
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geometry = new THREE.BufferGeometry();
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const vertices = new Float32Array( width * height * 3 );
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for ( let i = 0, j = 0, l = vertices.length; i < l; i += 3, j ++ ) {
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vertices[ i ] = j % width;
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vertices[ i + 1 ] = Math.floor( j / width );
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}
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geometry.setAttribute( 'position', new THREE.BufferAttribute( vertices, 3 ) );
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material = new THREE.ShaderMaterial( {
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uniforms: {
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'map': { value: texture },
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'width': { value: width },
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'height': { value: height },
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'nearClipping': { value: nearClipping },
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'farClipping': { value: farClipping },
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'pointSize': { value: 2 },
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'zOffset': { value: 1000 }
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},
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vertexShader: document.getElementById( 'vs' ).textContent,
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fragmentShader: document.getElementById( 'fs' ).textContent,
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blending: THREE.AdditiveBlending,
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depthTest: false, depthWrite: false,
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transparent: true
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} );
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mesh = new THREE.Points( geometry, material );
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scene.add( mesh );
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const gui = new GUI();
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gui.add( material.uniforms.nearClipping, 'value', 1, 10000, 1.0 ).name( 'nearClipping' );
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gui.add( material.uniforms.farClipping, 'value', 1, 10000, 1.0 ).name( 'farClipping' );
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gui.add( material.uniforms.pointSize, 'value', 1, 10, 1.0 ).name( 'pointSize' );
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gui.add( material.uniforms.zOffset, 'value', 0, 4000, 1.0 ).name( 'zOffset' );
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video.play();
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//
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renderer = new THREE.WebGLRenderer();
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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container.appendChild( renderer.domElement );
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mouse = new THREE.Vector3( 0, 0, 1 );
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document.addEventListener( 'mousemove', onDocumentMouseMove );
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//
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window.addEventListener( 'resize', onWindowResize );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function onDocumentMouseMove( event ) {
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mouse.x = ( event.clientX - window.innerWidth / 2 ) * 8;
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mouse.y = ( event.clientY - window.innerHeight / 2 ) * 8;
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}
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function animate() {
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requestAnimationFrame( animate );
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render();
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}
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function render() {
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camera.position.x += ( mouse.x - camera.position.x ) * 0.05;
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camera.position.y += ( - mouse.y - camera.position.y ) * 0.05;
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camera.lookAt( center );
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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