[WebGL] Web-Cam Texture

이번 예제는 Web-Cam으로부터 받은 화면 이미지를 각종 오브젝트의 texture로 출력하는 예제입니다.

웹캠이 없는 경우 각 오브젝트의 texture는 검게 출력되며, 웹 브라우저가 웹캠을 허용하겠냐는 메시지에 대하여 허용하지 않을 경우에도 검게 출력됩니다.

Download Project

01-02-webcam-texture.zip

FULL SCREEN

[Operations]

Mouse Left Button Click & Drag: Camera Rotating

Mouse Wheel: Camera Zoom In & Out

Mouse Right Button Click & Drag: Camera Panning

[main.js]

// standard global variables
var container, scene, camera, renderer, controls, stats;
var keyboard = new THREEx.KeyboardState();

// custom global variables
var video, videoImage, videoImageContext, videoTexture;
var play;

init();
animate();

// FUNCTIONS 		
function init() 
{
	// PLAY OR PAUSE
	play = 1;

	// 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
	scene.fog = new THREE.FogExp2( 0x2d2df9, 0.00025 );
	
	///////////
	// VIDEO //
	///////////
	video = document.getElementById( 'monitor' );
	
	videoImage = document.getElementById( 'videoImage' );
	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( 100, 100, 1, 1 );
	var movieScreen = new THREE.Mesh( movieGeometry, movieMaterial );
	movieScreen.position.set(0,50,0);
	scene.add(movieScreen);

	// ADD A CYLINDER GEOMETRY
	var cylinderGeometry = new THREE.CylinderGeometry( 50, 50, 64, 64 ); // radiusTop, radiusBottom, height, radiusSegments, heightSegments, openEnded
	var cylinderMaterial = new THREE.MeshLambertMaterial( { color: 0xdf18bc } );
	cylinderMesh = new THREE.Mesh( cylinderGeometry, movieMaterial );
	cylinderMesh.position.set(150,50,0);
	cylinderMesh.rotation.set(0,180,0);
	scene.add(cylinderMesh);

	// ADD A CUBE GEOMETRY
	var cubeGeometry = new THREE.CubeGeometry( 100, 100, 100 ); // width, height, depth, widthSegments, heightSegments, depthSegments
	var cubeMaterial = new THREE.MeshLambertMaterial( { color: 0x7dc9b6 } );
	cubeMesh = new THREE.Mesh( cubeGeometry, movieMaterial );
	cubeMesh.position.set(-150,50,-30);
	scene.add(cubeMesh);
	
	camera.position.set(0,150,300);
	camera.lookAt(movieScreen.position);
}

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

function update()
{
	if ( keyboard.pressed("p") )
		play *= -1; 

	if(play == 1)
		video.play();
	else
		video.pause();

	controls.update();
	stats.update();
}

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

	renderer.render( scene, camera );
}