1

The video texture example below does not seem to work on android LG nexus phone although all other non video examples work including the youtube example on three.js.

Does anyone else have this issue? I am trying to render video using THREE.WebGLRenderer so that I can ultimately use stereo effect with it to use it with VR (like google cardboard) kit. So far only CSS3DRenderer/Canvas rendered videos seem to work on the phone. But I can't use these renderers because stereo effect does not work with these renderers (i.e effect = new THREE.StereoEffect(renderer);)

http://mrdoob.github.io/three.js/examples/webgl_materials_video.html

Please let me know if there is to get videos render with stereo effect.

UPDATE---------------CODE ON HAND (Adapted from http://stemkoski.github.io/Three.js/Video.html)

            <!doctype html>
            <html lang="en">
            <head>
                <title>Video Texture (Three.js)</title>
                <meta charset="utf-8">
                <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
                <!-- <link rel=stylesheet href="css/base.css"/> -->
            </head>
            <body>

            <script src="js/three.min.js"></script>
            <script src="js/controls/OrbitControls.js"></script>
            <script src="js/effects/StereoEffect.js"></script>

            <div id="ThreeJS"></div>
            <script>
            var container, scene, camera, renderer, controls, stats, effect, element;
            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 = new THREE.WebGLRenderer( {antialias:true} );

                //effect = new THREE.StereoEffect(renderer);
                renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
                element= renderer.domElement;
                //effect.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
                container = document.getElementById( 'ThreeJS' );
                container.appendChild( element );
                // CONTROLS
                controls = new THREE.OrbitControls( camera, element );
                element.addEventListener('click', fullscreen, false);


                // LIGHT
                var light = new THREE.PointLight(0xffffff);
                light.position.set(0,250,0);
                scene.add(light);


                ///////////
                // VIDEO //
                ///////////

                // create the video element
                video = document.createElement( 'video' );
                //video.id = 'video';
                video.type = ' video/mp4; codecs="theora, vorbis" ';
                video.src = "video/sintel.ogv";
                video.load(); // must call after setting/changing source
                video.play();

                videoImage = document.createElement( 'canvas' );
                videoImage.width = 320;
                videoImage.height = 240;

                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(0,50,00);
                scene.add(movieScreen);

                camera.position.set(0,150,300);
                camera.lookAt(movieScreen.position);

                window.addEventListener('resize', resize, false);
                  setTimeout(resize, 1);


            }

                function update() {
                  resize();

                  camera.updateProjectionMatrix();

                  controls.update();
                }

            function animate() 
            {
                requestAnimationFrame( animate );
                render();       
                //update();
            }

            function fullscreen() {

                video.play();
                console.log(video);
                  if (container.requestFullscreen) {
                    container.requestFullscreen();
                  } else if (container.msRequestFullscreen) {
                    container.msRequestFullscreen();
                  } else if (container.mozRequestFullScreen) {
                    container.mozRequestFullScreen();
                  } else if (container.webkitRequestFullscreen) {
                    container.webkitRequestFullscreen();
                  }
                }

                    function resize() {
                  var width = container.offsetWidth;
                  var height = container.offsetHeight;

                  //console.log(container, width,height);

                  camera.aspect = width / height;
                  camera.updateProjectionMatrix();

                  renderer.setSize(width, height);
                  //effect.setSize(width, height);
                }


            function render() 
            {   
                if ( video.readyState === video.HAVE_ENOUGH_DATA ) 
                {
                    videoImageContext.drawImage( video, 0, 0 );
                    if ( videoTexture ) 
                        videoTexture.needsUpdate = true;
                }

                renderer.render( scene, camera );
            }

            </script>

            </body>
            </html>
4

1 回答 1

1

在移动设备上,除非从用户操作开始,否则视频不会播放。因此,如果您从事件侦听器执行该init方法,它应该可以工作。mousedown

于 2014-09-30T03:53:49.197 回答