mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-12-24 12:03:48 +01:00
343 lines
12 KiB
HTML
343 lines
12 KiB
HTML
|
<!DOCTYPE html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>three.js webgl - cameras - logarithmic depth buffer</title>
|
||
|
|
<meta charset="utf-8">
|
||
|
|
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
|
||
|
|
<style>
|
||
|
|
body {
|
||
|
|
color: #808080;
|
||
|
|
font-family:Monospace;
|
||
|
|
font-size:13px;
|
||
|
|
text-align:center;
|
||
|
|
|
||
|
|
background-color: #000;
|
||
|
|
margin: 0px;
|
||
|
|
overflow: hidden;
|
||
|
|
}
|
||
|
|
|
||
|
|
#info {
|
||
|
|
position: absolute;
|
||
|
|
top: 0px; width: 100%;
|
||
|
|
padding: 5px;
|
||
|
|
z-index: 100;
|
||
|
|
color: #ddd;
|
||
|
|
text-shadow: 0 0 1px rgba(0,0,0,1);
|
||
|
|
}
|
||
|
|
|
||
|
|
a {
|
||
|
|
|
||
|
|
color: #0080ff;
|
||
|
|
}
|
||
|
|
|
||
|
|
b { color: lightgreen }
|
||
|
|
|
||
|
|
#stats { position: absolute; top:0; left: 0 }
|
||
|
|
|
||
|
|
.renderer_label {
|
||
|
|
position: absolute;
|
||
|
|
bottom: 1em;
|
||
|
|
width: 100%;
|
||
|
|
color: white;
|
||
|
|
z-index: 10;
|
||
|
|
display: block;
|
||
|
|
text-align: center;
|
||
|
|
}
|
||
|
|
.renderer_label.renderer_label_normal {
|
||
|
|
}
|
||
|
|
.renderer_label.renderer_label_logzbuf {
|
||
|
|
}
|
||
|
|
#container {
|
||
|
|
white-space: nowrap;
|
||
|
|
}
|
||
|
|
#container_normal {
|
||
|
|
width: 50%;
|
||
|
|
display: inline-block;
|
||
|
|
position: relative;
|
||
|
|
overflow: hidden;
|
||
|
|
}
|
||
|
|
#container_logzbuf {
|
||
|
|
width: 50%;
|
||
|
|
display: inline-block;
|
||
|
|
position: relative;
|
||
|
|
overflow: hidden;
|
||
|
|
}
|
||
|
|
#renderer_border {
|
||
|
|
position: absolute;
|
||
|
|
top: 0;
|
||
|
|
bottom: 0;
|
||
|
|
width: 2px;
|
||
|
|
z-index: 10;
|
||
|
|
opacity: .8;
|
||
|
|
background: #ccc;
|
||
|
|
border: 1px inset #ccc;
|
||
|
|
cursor: col-resize;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<div id="container">
|
||
|
|
<div id="container_normal"><h2 class="renderer_label renderer_label_normal">normal z-buffer</h2></div><div id="container_logzbuf"><h2 class="renderer_label renderer_label_logzbuf">logarithmic z-buffer</h2></div>
|
||
|
|
<div id="renderer_border"></div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<div id="info">
|
||
|
|
<a href="http://threejs.org" target="_blank">three.js</a> - cameras - logarithmic depth buffer<br/>
|
||
|
|
Zoom through scene with objects ranging in size from 1µm to 100,000,000 light years using the mousewheel<br/>
|
||
|
|
Linear z-buffer handles close-up objects well, but fails spectacularly at distant objects<br/>
|
||
|
|
Logarithmic handles all but the smallest objects with ease
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<script src="../build/three.min.js"></script>
|
||
|
|
<script src="js/libs/stats.min.js"></script>
|
||
|
|
<script src="fonts/helvetiker_regular.typeface.js"></script>
|
||
|
|
|
||
|
|
<script>
|
||
|
|
|
||
|
|
// 1 micrometer to 100 billion light years in one scene, with 1 unit = 1 meter? preposterous! and yet...
|
||
|
|
var NEAR = 1e-6, FAR = 1e27;
|
||
|
|
var SCREEN_WIDTH = window.innerWidth;
|
||
|
|
var SCREEN_HEIGHT = window.innerHeight;
|
||
|
|
var screensplit = .25, screensplit_right = 0;
|
||
|
|
var mouse = [.5, .5];
|
||
|
|
var zoompos = -100, minzoomspeed = .015;
|
||
|
|
var zoomspeed = minzoomspeed;
|
||
|
|
|
||
|
|
var container, stats;
|
||
|
|
var objects = {};
|
||
|
|
|
||
|
|
// Generate a number of text labels, from 1µm in size up to 100,000,000 light years
|
||
|
|
// Try to use some descriptive real-world examples of objects at each scale
|
||
|
|
|
||
|
|
var labeldata = [
|
||
|
|
{ size: .01, scale: .001, label: "microscopic (1µm)", scale: .0001 }, // FIXME - triangulating text fails at this size, so we scale instead
|
||
|
|
{ size: .01, scale: 0.1, label: "minuscule (1mm)", scale: .1},
|
||
|
|
{ size: .01, scale: 1.0, label: "tiny (1cm)", scale: 1 },
|
||
|
|
{ size: 1, scale: 1.0, label: "child-sized (1m)", scale: 1 },
|
||
|
|
{ size: 10, scale: 1.0, label: "tree-sized (10m)", scale: 1 },
|
||
|
|
{ size: 100, scale: 1.0, label: "building-sized (100m)", scale: 1 },
|
||
|
|
{ size: 1000, scale: 1.0, label: "medium (1km)", scale: 1 },
|
||
|
|
{ size: 10000, scale: 1.0, label: "city-sized (10km)", scale: 1 },
|
||
|
|
{ size: 3400000, scale: 1.0, label: "moon-sized (3,400 Km)", scale: 1 },
|
||
|
|
{ size: 12000000, scale: 1.0, label: "planet-sized (12,000 km)", scale: 1 },
|
||
|
|
{ size: 1400000000, scale: 1.0, label: "sun-sized (1,400,000 km)", scale: 1 },
|
||
|
|
{ size: 7.47e12, scale: 1.0, label: "solar system-sized (50Au)", scale: 1 },
|
||
|
|
{ size: 9.4605284e15, scale: 1.0, label: "gargantuan (1 light year)", scale: 1 },
|
||
|
|
{ size: 3.08567758e16, scale: 1.0, label: "ludicrous (1 parsec)", scale: 1 },
|
||
|
|
{ size: 1e19, scale: 1.0, label: "mind boggling (1000 light years)", scale: 1 },
|
||
|
|
{ size: 1.135e21, scale: 1.0, label: "galaxy-sized (120,000 light years)", scale: 1 },
|
||
|
|
{ size: 9.46e23, scale: 1.0, label: "... (100,000,000 light years)", scale: 1 }
|
||
|
|
];
|
||
|
|
|
||
|
|
init();
|
||
|
|
animate();
|
||
|
|
|
||
|
|
function init() {
|
||
|
|
|
||
|
|
container = document.getElementById( 'container' );
|
||
|
|
|
||
|
|
// Initialize two copies of the same scene, one with normal z-buffer and one with logarithmic z-buffer
|
||
|
|
objects.normal = initScene('normal', false);
|
||
|
|
objects.logzbuf = initScene('logzbuf', true);
|
||
|
|
|
||
|
|
stats = new Stats();
|
||
|
|
container.appendChild(stats.domElement);
|
||
|
|
|
||
|
|
// Resize border allows the user to easily compare effects of logarithmic depth buffer over the whole scene
|
||
|
|
border = document.getElementById( 'renderer_border' );
|
||
|
|
border.addEventListener("mousedown", onBorderMouseDown);
|
||
|
|
|
||
|
|
window.addEventListener( 'resize', onWindowResize, false );
|
||
|
|
window.addEventListener( 'mousewheel', onMouseWheel, false );
|
||
|
|
window.addEventListener( 'DOMMouseScroll', onMouseWheel, false );
|
||
|
|
window.addEventListener( 'mousemove', onMouseMove, false );
|
||
|
|
|
||
|
|
render();
|
||
|
|
}
|
||
|
|
|
||
|
|
function initScene(name, logDepthBuf) {
|
||
|
|
|
||
|
|
var scene = new THREE.Scene();
|
||
|
|
var framecontainer = document.getElementById('container_' + name);
|
||
|
|
|
||
|
|
var camera = new THREE.PerspectiveCamera( 50, screensplit * SCREEN_WIDTH / SCREEN_HEIGHT, NEAR, FAR );
|
||
|
|
scene.add(camera);
|
||
|
|
|
||
|
|
var light = new THREE.DirectionalLight(0xffffff, 1);
|
||
|
|
light.position.set(100,100,100);
|
||
|
|
scene.add(light);
|
||
|
|
|
||
|
|
var materialargs = {
|
||
|
|
color: 0xffffff,
|
||
|
|
specular: 0xffaa00,
|
||
|
|
shininess: 50,
|
||
|
|
shading: THREE.SmoothShading,
|
||
|
|
emissive: 0x000000
|
||
|
|
};
|
||
|
|
|
||
|
|
var geomtransform = new THREE.Matrix4();
|
||
|
|
var tmpvec = new THREE.Vector3();
|
||
|
|
var meshes = [];
|
||
|
|
var coloroffset = 0;
|
||
|
|
var colorskip = ['black', 'antiquewhite', 'bisque', 'beige', 'blanchedalmond', 'darkblue', 'darkcyan'];
|
||
|
|
var colorkeys = Object.keys( THREE.ColorKeywords );
|
||
|
|
|
||
|
|
for (var i = 0; i < labeldata.length; i++) {
|
||
|
|
var scale = labeldata[i].scale || 1;
|
||
|
|
var labelgeo = new THREE.TextGeometry( labeldata[i].label, {
|
||
|
|
size: labeldata[i].size,
|
||
|
|
height: labeldata[i].size / 2,
|
||
|
|
font: 'helvetiker',
|
||
|
|
});
|
||
|
|
labelgeo.computeBoundingSphere();
|
||
|
|
|
||
|
|
// center text
|
||
|
|
geomtransform.setPosition( tmpvec.set( -labelgeo.boundingSphere.radius, 0, 0 ) );
|
||
|
|
labelgeo.applyMatrix( geomtransform );
|
||
|
|
|
||
|
|
// Pick a color at "random". Exclude black, because it looks bad.
|
||
|
|
while ( colorskip.indexOf( colorkeys[ i + coloroffset ] ) != -1 ) {
|
||
|
|
coloroffset++;
|
||
|
|
}
|
||
|
|
materialargs.color = THREE.ColorKeywords[ colorkeys[ i + coloroffset ] ];
|
||
|
|
|
||
|
|
var material = new THREE.MeshPhongMaterial( materialargs );
|
||
|
|
|
||
|
|
var textmesh = new THREE.Mesh( labelgeo, material );
|
||
|
|
textmesh.scale.set(scale, scale, scale);
|
||
|
|
textmesh.position.z = -labeldata[i].size * scale;
|
||
|
|
textmesh.position.y = labeldata[i].size / 4 * scale;
|
||
|
|
textmesh.updateMatrix();
|
||
|
|
|
||
|
|
var dotmesh = new THREE.Mesh(new THREE.SphereGeometry(labeldata[i].size * scale / 2, 24, 12), material);
|
||
|
|
dotmesh.position.y = -labeldata[i].size / 4 * scale;
|
||
|
|
dotmesh.updateMatrix();
|
||
|
|
|
||
|
|
var merged = new THREE.Geometry();
|
||
|
|
merged.merge( textmesh.geometry, textmesh.matrix );
|
||
|
|
merged.merge( dotmesh.geometry, dotmesh.matrix );
|
||
|
|
|
||
|
|
var mesh = new THREE.Mesh(merged, material);
|
||
|
|
mesh.position.z = -labeldata[i].size * 1 * scale;
|
||
|
|
|
||
|
|
scene.add(mesh);
|
||
|
|
}
|
||
|
|
|
||
|
|
var renderer = new THREE.WebGLRenderer({ antialias: true, logarithmicDepthBuffer: logDepthBuf });
|
||
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
||
|
|
renderer.setSize(SCREEN_WIDTH/2, SCREEN_HEIGHT);
|
||
|
|
renderer.domElement.style.position = "relative";
|
||
|
|
renderer.domElement.id = 'renderer_' + name;
|
||
|
|
framecontainer.appendChild(renderer.domElement);
|
||
|
|
|
||
|
|
return { container: framecontainer, renderer: renderer, scene: scene, camera: camera }
|
||
|
|
}
|
||
|
|
|
||
|
|
function updateRendererSizes() {
|
||
|
|
|
||
|
|
// Recalculate size for both renderers when screen size or split location changes
|
||
|
|
|
||
|
|
SCREEN_WIDTH = window.innerWidth;
|
||
|
|
SCREEN_HEIGHT = window.innerHeight;
|
||
|
|
|
||
|
|
screensplit_right = 1 - screensplit;
|
||
|
|
|
||
|
|
objects.normal.renderer.setSize( screensplit * SCREEN_WIDTH, SCREEN_HEIGHT );
|
||
|
|
objects.normal.camera.aspect = screensplit * SCREEN_WIDTH / SCREEN_HEIGHT;
|
||
|
|
objects.normal.camera.updateProjectionMatrix();
|
||
|
|
objects.normal.camera.setViewOffset( SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0, SCREEN_WIDTH * screensplit, SCREEN_HEIGHT );
|
||
|
|
objects.normal.container.style.width = (screensplit * 100) + '%';
|
||
|
|
|
||
|
|
objects.logzbuf.renderer.setSize( screensplit_right * SCREEN_WIDTH, SCREEN_HEIGHT );
|
||
|
|
objects.logzbuf.camera.aspect = screensplit_right * SCREEN_WIDTH / SCREEN_HEIGHT;
|
||
|
|
objects.logzbuf.camera.updateProjectionMatrix();
|
||
|
|
objects.logzbuf.camera.setViewOffset( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_WIDTH * screensplit, 0, SCREEN_WIDTH * screensplit_right, SCREEN_HEIGHT );
|
||
|
|
objects.logzbuf.container.style.width = (screensplit_right * 100) + '%';
|
||
|
|
|
||
|
|
border.style.left = (screensplit * 100) + "%";
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function animate() {
|
||
|
|
|
||
|
|
requestAnimationFrame( animate );
|
||
|
|
render();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function render() {
|
||
|
|
|
||
|
|
// Put some limits on zooming
|
||
|
|
var minzoom = labeldata[0].size * labeldata[0].scale*1;
|
||
|
|
var maxzoom = labeldata[labeldata.length-1].size * labeldata[labeldata.length-1].scale * 100;
|
||
|
|
var damping = (Math.abs(zoomspeed) > minzoomspeed ? .95 : 1.0);
|
||
|
|
|
||
|
|
// Zoom out faster the further out you go
|
||
|
|
var zoom = THREE.Math.clamp(Math.pow(Math.E, zoompos), minzoom, maxzoom);
|
||
|
|
zoompos = Math.log(zoom);
|
||
|
|
|
||
|
|
// Slow down quickly at the zoom limits
|
||
|
|
if ((zoom == minzoom && zoomspeed < 0) || (zoom == maxzoom && zoomspeed > 0)) {
|
||
|
|
damping = .85;
|
||
|
|
}
|
||
|
|
|
||
|
|
zoompos += zoomspeed;
|
||
|
|
zoomspeed *= damping;
|
||
|
|
|
||
|
|
objects.normal.camera.position.x = Math.sin(.5 * Math.PI * (mouse[0] - .5)) * zoom;
|
||
|
|
objects.normal.camera.position.y = Math.sin(.25 * Math.PI * (mouse[1] - .5)) * zoom;
|
||
|
|
objects.normal.camera.position.z = Math.cos(.5 * Math.PI * (mouse[0] - .5)) * zoom;
|
||
|
|
objects.normal.camera.lookAt(objects.normal.scene.position);
|
||
|
|
|
||
|
|
// Clone camera settings across both scenes
|
||
|
|
objects.logzbuf.camera.position.copy(objects.normal.camera.position);
|
||
|
|
objects.logzbuf.camera.quaternion.copy(objects.normal.camera.quaternion);
|
||
|
|
|
||
|
|
// Update renderer sizes if the split has changed
|
||
|
|
if (screensplit_right != 1 - screensplit) {
|
||
|
|
updateRendererSizes();
|
||
|
|
}
|
||
|
|
|
||
|
|
objects.normal.renderer.render(objects.normal.scene, objects.normal.camera);
|
||
|
|
objects.logzbuf.renderer.render(objects.logzbuf.scene, objects.logzbuf.camera);
|
||
|
|
|
||
|
|
stats.update();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function onWindowResize(event) {
|
||
|
|
updateRendererSizes();
|
||
|
|
}
|
||
|
|
|
||
|
|
function onBorderMouseDown(ev) {
|
||
|
|
// activate draggable window resizing bar
|
||
|
|
window.addEventListener("mousemove", onBorderMouseMove);
|
||
|
|
window.addEventListener("mouseup", onBorderMouseUp);
|
||
|
|
ev.stopPropagation();
|
||
|
|
ev.preventDefault();
|
||
|
|
}
|
||
|
|
function onBorderMouseMove(ev) {
|
||
|
|
screensplit = Math.max(0, Math.min(1, ev.clientX / window.innerWidth));
|
||
|
|
ev.stopPropagation();
|
||
|
|
}
|
||
|
|
function onBorderMouseUp(ev) {
|
||
|
|
window.removeEventListener("mousemove", onBorderMouseMove);
|
||
|
|
window.removeEventListener("mouseup", onBorderMouseUp);
|
||
|
|
}
|
||
|
|
function onMouseMove(ev) {
|
||
|
|
mouse[0] = ev.clientX / window.innerWidth;
|
||
|
|
mouse[1] = ev.clientY / window.innerHeight;
|
||
|
|
}
|
||
|
|
function onMouseWheel(ev) {
|
||
|
|
var amount = -ev.wheelDeltaY || ev.detail;
|
||
|
|
var dir = amount / Math.abs(amount);
|
||
|
|
zoomspeed = dir/10;
|
||
|
|
|
||
|
|
// Slow down default zoom speed after user starts zooming, to give them more control
|
||
|
|
minzoomspeed = 0.001;
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
</body>
|
||
|
|
</html>
|