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multiple.html
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<!doctype html>
<html lang="en">
<head>
<title>Camera</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js"></script>
<script src="js/lib/three.min.js"></script>
<script src="js/shaders/camera.js"></script>
<script src="js/lib/stats.min.js"></script>
<script type="text/javascript" src="js/lib/dat.gui.min.js"></script>
<script src="js/webcam.js"></script>
<script src="js/perspective.js"></script>
<link href="css/style.css" rel="stylesheet" type="text/css">
</head>
<body class="show-camera show-fps">
<div id="menu">
<a href="index.html">single camera</a>
<strong>multiple cameras</strong>
<a href="motion.html">motion</a>
<a href="threshold.html">threshold</a>
<a href="warp.html">warp</a>
<a href="fx.html">fx</a>
</div>
<div id="camera0" class="camera">
<div class="label">Camera #</div>
<video id="input0" autoplay width="640" height="480" class="webcam"></video>
<canvas id="canvas0" width="640" height="480" class="hidden"></canvas>
<div class="crop">
<canvas class="vertexCanvas" width="640" height="480"></canvas>
<div class="vertexcontainer">
<div class="vertex" data-vertexnumber="1"><div class="handle">P1</div></div>
<div class="vertex" data-vertexnumber="2"><div class="handle">P2</div></div>
<div class="vertex" data-vertexnumber="3"><div class="handle">P3</div></div>
<div class="vertex" data-vertexnumber="0"><div class="handle">P0</div></div>
</div>
</div>
</div>
<script>
var SCREEN_HEIGHT = 480;
var SCREEN_WIDTH = 640;
var CONFIG_HIDE_DELAY = 10;
var config = {
soft: 0.001,
threshold: 0.075,
detectMotion: true,
showCamera: true,
showFPS: true,
camera: ''
};
$(function() {
init();
animate();
var scene, camera, renderer, video, videoTexture, prevTexture, videoContxt, uniforms, prevTime;
function init(){
stats = new Stats();
document.body.appendChild( stats.domElement );
video = new Array();
videoContext = new Array();
videoTexture = new Array();
prevTexture = new Array();
prevTime = new Array();
uniforms = new Array();
var gui = new dat.GUI();
gui.add(config, 'threshold',0,1).onChange(function(value) {
for(var i = 0; i < uniforms.length; i++)
uniforms[i]['threshold'].value = config['threshold'];
});
gui.add(config, 'soft',0,1).onChange(function(value) {
for(var i = 0; i < uniforms.length; i++)
uniforms[i]['soft'].value = config['soft'];
});
gui.add(config, 'detectMotion').onChange(function(value) {
if(!value){
for(var i = 0; i < uniforms.length; i++){
videoContext[i].clearRect(0,0,SCREEN_WIDTH,SCREEN_HEIGHT);
prevTexture[i].image.data = new Uint8Array(videoContext[i].getImageData(0,0,SCREEN_WIDTH, SCREEN_HEIGHT).data.buffer);
prevTexture[i].needsUpdate = true;
}
}
});
gui.add(config, 'showCamera').onChange(function(value) {
if(value) $('body').addClass("show-camera");
else $('body').removeClass("show-camera");
});
gui.add(config, 'showFPS').onChange(function(value) {
if(value) $('body').addClass("show-fps");
else $('body').removeClass("show-fps");
});
//uncomment to enable config auto-hide
/*var timeoutConfig = setTimeout(hideConfig,CONFIG_HIDE_DELAY*1000);
jQuery('.dg').mouseover(function(e){ clearTimeout(timeoutConfig); });*/
jQuery(".dg .close-button").click(hideConfig);
function hideConfig(){
$('body').removeClass("show-camera");
config['showCamera'] = false;
$('body').removeClass("show-fps");
config['showFPS'] = false;
$('#menu').addClass('hidden');
jQuery(gui.domElement).remove();
$('#github').remove();
}
scene = new THREE.Scene();
camera = new THREE.Camera();
scene.add(camera);
renderer = new THREE.WebGLRenderer();
renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
renderer.domElement.width = SCREEN_WIDTH;
renderer.domElement.height = SCREEN_HEIGHT;
renderer.domElement.className = renderer.domElement.className + " render output";
renderer.autoClear = false;
document.body.insertBefore(renderer.domElement, document.body.childNodes[0]);
webcam.updateSources(function(s){
for(var i = 0; i < s.length; i++){
var containerID = "camera"+i;
var videoID = "input"+i;
var $container = $('#camera0');
//if more than one camera: clone.
if(i > 0){
$container.clone().attr('id',containerID).appendTo('body');
$container = $('#'+containerID);
$container.animate({marginLeft: '+=40px',marginTop: '+=40px'}, 0);
$container.children('.webcam').attr('id',videoID);
$container.children('canvas').attr('id','canvas'+i);
}
webcam.start(videoID,s[i]);
var geometry = new THREE.PlaneGeometry( 2/s.length, 2);
video[i] = document.getElementById(videoID);
videoContext[i] = document.getElementById('canvas'+i).getContext('2d');
videoTexture[i] = new THREE.DataTexture([],SCREEN_WIDTH,SCREEN_HEIGHT);
prevTexture[i] = new THREE.DataTexture([],SCREEN_WIDTH,SCREEN_HEIGHT);
prevTime[i] = -1;
uniforms[i] = {
tDiffuse: { type: "t", value: videoTexture[i] },
tPrevious: { type: "t", value: prevTexture[i] },
soft: { type: "f", value: 0.001 },
threshold: { type: "f", value: 0.075 },
m: { type: "m4", value: new THREE.Matrix4() }
}
var material = new THREE.ShaderMaterial({
uniforms: uniforms[i],
vertexShader: THREE.CameraShader.vertexShader,
fragmentShader: THREE.CameraShader.fragmentShader
});
var mesh = new THREE.Mesh(geometry,material);
mesh.position.x = -0.5+(i/s.length)*2;
mesh.material.depthTest = false;
mesh.material.depthWrite = false;
scene.add(mesh);
$container.children('.label').text('camera '+i);
$container.draggable().on('mousedown', function(event) {
$('.camera').css('z-index','1000');
$(this).css('z-index','1001');
});
$(".vertex",$container).draggable({
stack: "div",
snap: false,
handle: "div.handle",
start: function() {
$(".currenthandle",$container).removeClass("currenthandle");
$(this).children("div.handle").addClass("currenthandle");
},
drag: function(){
var $container = $(this).parents('.camera');
var cameraIndex = parseInt($container.attr('id').replace('camera',''));
var canvas = $(".vertexCanvas",$container).get(0);
var context = canvas.getContext("2d");
//vertices of crop box
var p = [
new THREE.Vector2(),
new THREE.Vector2(),
new THREE.Vector2(),
new THREE.Vector2()
];
//This is always the original source state
var screen = [
new THREE.Vector2(0,1),
new THREE.Vector2(1,1),
new THREE.Vector2(1,0),
new THREE.Vector2(0,0)
];
context.strokeStyle = "rgba(0, 100, 200,0.5)";
context.fillStyle = "rgba(0, 100, 200,0.15)";
context.clearRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT );
//calculate and display the crop box and vertices
context.beginPath();
var first = true;
$(".vertexcontainer .vertex",$container).each(function() {
var position = $(this).position();
var i = $(this).attr('data-vertexnumber');
var x = position.left;
var y = position.top;
p[i].x = x / SCREEN_WIDTH;
p[i].y = 1-(y / SCREEN_HEIGHT);
if (first) {
context.moveTo(x, y);
first = false;
} else {
context.lineTo(x, y);
}
});
context.closePath();
context.stroke();
context.fill();
var m = getPerspective(screen,p);
//create a ofMatrix4x4 in column order
uniforms[cameraIndex]['m'].value = new THREE.Matrix4(
m[0], m[4],m[8], m[12],
m[1], m[5],m[9], m[13],
m[2], m[6],m[10],m[14],
m[3], m[7],m[11],m[15]);
} //end drag handler
}); //end vertices
} //end loop over video sources
}); //end on update video sources
}
function animate()
{
for(var i = 0; i < video.length; i++ ){
if(video[i].readyState === video[i].HAVE_ENOUGH_DATA){
var time = video[i].currentTime;
if(time !== prevTime[i]){
try {
videoContext[i].drawImage(video[i], 0, 0,SCREEN_WIDTH,SCREEN_HEIGHT);
if(config.detectMotion && videoTexture[i].image.data.length){
prevTexture[i].image.data = videoTexture[i].image.data;
prevTexture[i].needsUpdate = true;
}
videoTexture[i].image.data = new Uint8Array(videoContext[i].getImageData(0,0,SCREEN_WIDTH, SCREEN_HEIGHT).data);
videoTexture[i].needsUpdate = true;
if(config['showFPS']) stats.update();
prevTime[i] = time;
}catch (e) {
if (e.name == "NS_ERROR_NOT_AVAILABLE") {
//firefox bug: https://bugzilla.mozilla.org/show_bug.cgi?id=879717
console.error(e);
} else {
throw e;
}
}
}
}
}
renderer.render(scene, camera);
requestAnimationFrame(animate);
}
});
</script>
<a id="github" href="https://github.com/zebradog/camera"><img style="position: absolute; top: 0; left: 0; border: 0;" src="https://camo.githubusercontent.com/567c3a48d796e2fc06ea80409cc9dd82bf714434/68747470733a2f2f73332e616d617a6f6e6177732e636f6d2f6769746875622f726962626f6e732f666f726b6d655f6c6566745f6461726b626c75655f3132313632312e706e67" alt="Fork me on GitHub" data-canonical-src="https://s3.amazonaws.com/github/ribbons/forkme_left_darkblue_121621.png"></a>
</body>
</html>