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index.html
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<html>
<head>
<title>Seene</title>
<script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r70/three.min.js"></script>
<script src="TrackballControls.js"></script>
<style type="text/css">
#model {
width: 512px;
height: 512px;
position: absolute;
}
</style>
</head>
<body>
<script type="text/javascript">
var model = (function () {
return {
width: 0,
height: 0,
renderer: null,
camera: null,
controls: null,
scene: null,
axis: null,
initialize: function (div_id, buffer) {
var div = $(div_id);
this.width = div.width();
this.height = div.height();
var header = this.read_header(buffer);
this.scene = this.create_scene(header, buffer);
this.camera = this.create_camera(header, this.scene);
this.controls = this.create_controls(this.camera);
this.renderer = new THREE.WebGLRenderer({antialias: false});
this.renderer.setSize(this.width, this.height);
this.renderer.setClearColor(0, 1);
div.append(this.renderer.domElement);
},
create_camera: function (header, scene) {
var camera = new THREE.PerspectiveCamera(
Math.atan2(0.495 * header.camera_width, header.camera_fx) * 360 / Math.PI,
this.width / this.height,
.01,
100
);
camera.position.set(0, 0, 1);
camera.up.set(-1, 0, 0);
camera.lookAt(scene.position);
return camera;
},
create_controls: function (camera) {
var controls = new THREE.TrackballControls(camera);
controls.target.set(0, 0, 0);
controls.rotateSpeed = 10.0;
controls.zoomSpeed = 1.2;
controls.panSpeed = 0.8;
controls.noZoom = false;
controls.noPan = false;
controls.staticMoving = false;
controls.dynamicDampingFactor = 0.15;
return controls;
},
create_scene: function (header, buffer) {
function add_face(geometry, a, b, c) {
geometry.faces.push(new THREE.Face3(a, b, c));
}
var depthmap = new Float32Array(buffer, header.header_size, header.depthmap_width * header.depthmap_height);
var geometry = new THREE.Geometry();
// TODO: Not sure what these are. Some sort of coefficients.
var xk = header.camera_fx / header.camera_width;
var yk = header.camera_fy / header.camera_height;
for (var y = 0; y < header.depthmap_height; ++y) {
for (var x = 0; x < header.depthmap_width; ++x) {
var depth = depthmap[y * header.depthmap_width + x];
geometry.vertices.push(
new THREE.Vector3(
depth * ((x + 0.5) / header.depthmap_width - 0.5) / xk,
-depth * ((y + 0.5) / header.depthmap_height - 0.5) / yk,
-(depth - 1)
)
);
if (y > 0 && x > 0) {
var a = (y - 1) * header.depthmap_width + x - 1;
var b = (y - 1) * header.depthmap_width + x;
var c = y * header.depthmap_width + x - 1;
var d = y * header.depthmap_width + x;
add_face(geometry, a, c, b);
add_face(geometry, b, c, d);
}
}
}
var mesh = new THREE.Mesh(geometry, new THREE.MeshBasicMaterial({wireframe: true}));
var scene = new THREE.Scene();
scene.add(mesh);
return scene;
},
update: function () {
this.controls.update();
},
render: function () {
this.renderer.render(this.scene, this.camera);
},
//
// Private stuff
//
read_header: function (buffer) {
function read_int(buffer, offset) {
return new Int32Array(buffer, offset, 1)[0];
}
function read_float(buffer, offset) {
return new Float32Array(buffer, offset, 1)[0];
}
var version = read_int(buffer, 0);
var header_size = 36;
if (version == 3) {
header_size = 44;
}
return {
version: version,
camera_width: read_int(buffer, 4),
camera_height: read_int(buffer, 8),
camera_fx: read_float(buffer, 12),
camera_fy: read_float(buffer, 16),
camera_k1: read_float(buffer, 20),
camera_k2: read_float(buffer, 24),
depthmap_width: read_int(buffer, 28),
depthmap_height: read_int(buffer, 32),
header_size: header_size
};
}
};
})();
function load_model(callback) {
var xhr = new XMLHttpRequest();
xhr.open("GET", "./scene.oemodel", true);
xhr.responseType = "arraybuffer";
xhr.onload = function(e) {
callback(this.response);
};
xhr.send();
}
$(function () {
load_model(function (buffer) {
model.initialize("#model", buffer);
animate();
});
});
function animate() {
requestAnimationFrame(animate);
model.update();
model.render();
}
</script>
<div id="model"></div>
</body>
</html>