[WebGL] Video Texture

이번 예제는 Video Texture에 관한 것입니다. Video Texture는 정적인 이미지 대신 비디오 영상을 texture로 사용하는 것이다. 예제에서의 비디오는 오디오를 포함하고 있습니다.

Download Project

05-04-video-texture.zip

 

Click here to view with full screen mode

Operations

Mouse Left Button Click & Drag: Camera Rotating

Mouse Wheel: Camera Zoom In & Out

Mouse Right Button Click & Drag: Camera Panning

main.js

// MAIN
 
// standard global variables
var container, scene, camera, renderer, controls, stats;
var keyboard = new THREEx.KeyboardState();
 
// custom global variables
var video, videoImage, videoImageContext, videoTexture;
 
init();
animate();
 
// FUNCTIONS
function init()
{
    // SCENE
    scene = new THREE.Scene();
 
    // CAMERA
    var SCREEN_WIDTH = window.innerWidth, SCREEN_HEIGHT = window.innerHeight;
    var VIEW_ANGLE = 45, ASPECT = SCREEN_WIDTH / SCREEN_HEIGHT, NEAR = 0.1, FAR = 20000;
    camera = new THREE.PerspectiveCamera( VIEW_ANGLE, ASPECT, NEAR, FAR);
    scene.add(camera);
    camera.position.set(0,150,400);
    camera.lookAt(scene.position);
 
    // RENDERER
    if ( Detector.webgl )
        renderer = new THREE.WebGLRenderer( {antialias:true} );
    else
        renderer = new THREE.CanvasRenderer(); 
    renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
    container = document.getElementById( 'ThreeJS' );
    container.appendChild( renderer.domElement );
 
    // CONTROLS
    controls = new THREE.OrbitControls( camera, renderer.domElement );
 
    // EVENTS
    THREEx.WindowResize(renderer, camera);
    THREEx.FullScreen.bindKey({ charCode : 'f'.charCodeAt(0) });
 
    // STATS
    stats = new Stats();
    stats.domElement.style.position = 'absolute';
    stats.domElement.style.bottom = '0px';
    stats.domElement.style.zIndex = 100;
    container.appendChild( stats.domElement );
 
    // LIGHT
    var light = new THREE.PointLight(0xffffff);
    light.position.set(0,250,0);
    scene.add(light);
 
    // FLOOR
    var floorTexture = new THREE.ImageUtils.loadTexture( 'img/Wood_floor.jpg' );
    floorTexture.wrapS = floorTexture.wrapT = THREE.RepeatWrapping;
    floorTexture.repeat.set( 1, 1 );
    var floorMaterial = new THREE.MeshBasicMaterial( { map: floorTexture, side: THREE.DoubleSide } );
    var floorGeometry = new THREE.PlaneGeometry(1000, 1000, 10, 10);
    var floor = new THREE.Mesh(floorGeometry, floorMaterial);
    floor.position.y = -0.5;
    floor.rotation.x = Math.PI / 2;
    scene.add(floor);
 
    // SKYBOX/FOG
    var skyBoxGeometry = new THREE.CubeGeometry( 10000, 10000, 10000 );
    var skyBoxMaterial = new THREE.MeshBasicMaterial( { color: 0x9999ff, side: THREE.BackSide } );
    var skyBox = new THREE.Mesh( skyBoxGeometry, skyBoxMaterial );
 
    scene.add(skyBox);
    scene.fog = new THREE.FogExp2( 0x9999ff, 0.00025 );
    
    ///////////
    // VIDEO //
    ///////////
    // create the video element
    video = document.createElement( 'video' );
    video.id = 'video';
    video.type = ' video/ogg; codecs="theora, vorbis" ';
    video.src = "videos/sintel.ogv";
    video.load(); // must call after setting/changing source
    video.play();
    
    // alternative method -- 
    // create DIV in HTML:
    // <video id="myVideo" autoplay style="display:none">
    //        <source src="videos/sintel.ogv" type='video/ogg; codecs="theora, vorbis"'>
    // </video>
    // and set JS variable:
    // video = document.getElementById( 'myVideo' );
    
    videoImage = document.createElement( 'canvas' );
    videoImage.width = 480;
    videoImage.height = 204;
 
    videoImageContext = videoImage.getContext( '2d' );
    // background color if no video present
    videoImageContext.fillStyle = '#000000';
    videoImageContext.fillRect( 0, 0, videoImage.width, videoImage.height );
 
    videoTexture = new THREE.Texture( videoImage );
    videoTexture.minFilter = THREE.LinearFilter;
    videoTexture.magFilter = THREE.LinearFilter;
    
    var movieMaterial = new THREE.MeshBasicMaterial( { map: videoTexture, overdraw: true, side:THREE.DoubleSide } );
    // the geometry on which the movie will be displayed;
    //         movie image will be scaled to fit these dimensions.
    var movieGeometry = new THREE.PlaneGeometry( 240, 100, 4, 4 );
    var movieScreen = new THREE.Mesh( movieGeometry, movieMaterial );
    movieScreen.position.set(0,50,0);
    scene.add(movieScreen);
    
    camera.position.set(0,150,300);
    camera.lookAt(movieScreen.position);
}
 
function animate()
{
    requestAnimationFrame( animate );
    render();        
    update();
}
 
function update()
{
    if ( keyboard.pressed("p") )
        video.play();
        
    if ( keyboard.pressed("space") )
        video.pause();
 
    if ( keyboard.pressed("s") ) // stop video
    {
        video.pause();
        video.currentTime = 0;
    }
    
    if ( keyboard.pressed("r") ) // rewind video
        video.currentTime = 0;
    
    controls.update();
    stats.update();
}
 
function render()
{
    if ( video.readyState === video.HAVE_ENOUGH_DATA ) 
    {
        videoImageContext.drawImage( video, 0, 0 );
        if ( videoTexture ) 
            videoTexture.needsUpdate = true;
    }
 
    renderer.render( scene, camera );
}