mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-11-26 15:34:57 +01:00
257 lines
5.8 KiB
HTML
Executable File
257 lines
5.8 KiB
HTML
Executable File
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js webgl - buffergeometry - lines - indexed</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: #cccccc;
|
|
font-family:Monospace;
|
|
font-size:13px;
|
|
text-align:center;
|
|
|
|
background-color: #000000;
|
|
margin: 0px;
|
|
overflow: hidden;
|
|
}
|
|
|
|
#info {
|
|
position: absolute;
|
|
top: 0px; width: 100%;
|
|
padding: 5px;
|
|
}
|
|
|
|
a {
|
|
|
|
color: #0080ff;
|
|
}
|
|
|
|
</style>
|
|
</head>
|
|
<body>
|
|
|
|
<div id="container"></div>
|
|
<div id="info"><a href="http://threejs.org" target="_blank">three.js</a> webgl - buffergeometry - lines - indexed</div>
|
|
|
|
<script src="../build/three.min.js"></script>
|
|
|
|
<script src="js/Detector.js"></script>
|
|
<script src="js/libs/stats.min.js"></script>
|
|
|
|
<script>
|
|
|
|
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
|
|
|
|
var container, stats;
|
|
|
|
var camera, scene, renderer;
|
|
|
|
var mesh, parent_node;
|
|
|
|
init();
|
|
animate();
|
|
|
|
function init() {
|
|
|
|
container = document.getElementById( 'container' );
|
|
|
|
camera = new THREE.PerspectiveCamera( 27, window.innerWidth / window.innerHeight, 1, 10000 );
|
|
camera.position.z = 9000;
|
|
|
|
scene = new THREE.Scene();
|
|
|
|
var geometry = new THREE.BufferGeometry();
|
|
var material = new THREE.LineBasicMaterial({ vertexColors: THREE.VertexColors });
|
|
|
|
var positions = [];
|
|
var next_positions_index = 0;
|
|
var colors = [];
|
|
var indices_array = [];
|
|
|
|
//
|
|
|
|
var iteration_count = 4;
|
|
var rangle = 60 * Math.PI / 180.0;
|
|
|
|
function add_vertex(v) {
|
|
|
|
if (next_positions_index == 0xffff) throw new Error("Too many points");
|
|
|
|
positions.push(v.x, v.y, v.z);
|
|
colors.push(Math.random()*0.5+0.5, Math.random()*0.5+0.5, 1);
|
|
return next_positions_index++;
|
|
}
|
|
|
|
// simple Koch curve
|
|
function snowflake_iteration(p0, p4, depth) {
|
|
|
|
if (--depth < 0) {
|
|
|
|
var i = next_positions_index-1; // p0 already there
|
|
add_vertex(p4);
|
|
indices_array.push(i, i+1);
|
|
return;
|
|
}
|
|
|
|
var v = p4.clone().sub(p0);
|
|
var v_tier = v.clone().multiplyScalar(1.0/3.0);
|
|
var p1 = p0.clone().add(v_tier);
|
|
|
|
var angle = Math.atan2(v.y, v.x) + rangle;
|
|
var length = v_tier.length();
|
|
var p2 = p1.clone();
|
|
p2.x += Math.cos(angle) * length;
|
|
p2.y += Math.sin(angle) * length;
|
|
|
|
var p3 = p0.clone().add(v_tier).add(v_tier);
|
|
|
|
snowflake_iteration(p0, p1, depth);
|
|
snowflake_iteration(p1, p2, depth);
|
|
snowflake_iteration(p2, p3, depth);
|
|
snowflake_iteration(p3, p4, depth);
|
|
}
|
|
|
|
function snowflake(points, loop, x_offset) {
|
|
|
|
for (var iteration = 0; iteration != iteration_count; ++iteration) {
|
|
|
|
add_vertex(points[0]);
|
|
for (var p_index=0, p_count=points.length-1; p_index != p_count; ++p_index) {
|
|
snowflake_iteration(points[p_index], points[p_index+1], iteration);
|
|
}
|
|
|
|
if (loop) snowflake_iteration(points[points.length-1], points[0], iteration);
|
|
|
|
// translate input curve for next iteration
|
|
for (var p_index=0, p_count=points.length; p_index != p_count; ++p_index) {
|
|
points[p_index].x += x_offset;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
var y = 0;
|
|
snowflake
|
|
(
|
|
[
|
|
new THREE.Vector3(0, y+0, 0),
|
|
new THREE.Vector3(500, y+0, 0)
|
|
],
|
|
false, 600
|
|
);
|
|
|
|
y += 600;
|
|
snowflake
|
|
(
|
|
[
|
|
new THREE.Vector3(0, y+0, 0),
|
|
new THREE.Vector3(250, y+400, 0),
|
|
new THREE.Vector3(500, y+0, 0)
|
|
],
|
|
true, 600
|
|
);
|
|
|
|
y += 600;
|
|
snowflake
|
|
(
|
|
[
|
|
new THREE.Vector3(0, y+0, 0),
|
|
new THREE.Vector3(500, y, 0),
|
|
new THREE.Vector3(500, y+500, 0),
|
|
new THREE.Vector3(0, y+500, 0),
|
|
],
|
|
true, 600
|
|
);
|
|
|
|
y += 1000;
|
|
snowflake
|
|
(
|
|
[
|
|
new THREE.Vector3(250, y+0, 0),
|
|
new THREE.Vector3(500, y+0, 0),
|
|
new THREE.Vector3(250, y+0, 0),
|
|
new THREE.Vector3(250, y+250, 0),
|
|
new THREE.Vector3(250, y+0, 0),
|
|
new THREE.Vector3(0, y, 0),
|
|
new THREE.Vector3(250, y+0, 0),
|
|
new THREE.Vector3(250, y-250, 0),
|
|
new THREE.Vector3(250, y+0, 0),
|
|
],
|
|
false, 600
|
|
);
|
|
// --------------------------------
|
|
|
|
geometry.addAttribute( 'index', new THREE.BufferAttribute( new Uint16Array( indices_array ), 1 ) );
|
|
geometry.addAttribute( 'position', new THREE.BufferAttribute( new Float32Array( positions ), 3 ) );
|
|
geometry.addAttribute( 'color', new THREE.BufferAttribute( new Float32Array( colors ), 3 ) );
|
|
geometry.computeBoundingSphere();
|
|
|
|
mesh = new THREE.Line( geometry, material, THREE.LinePieces );
|
|
mesh.position.x -= 1200;
|
|
mesh.position.y -= 1200;
|
|
|
|
parent_node = new THREE.Object3D();
|
|
parent_node.add(mesh);
|
|
|
|
scene.add( parent_node );
|
|
|
|
renderer = new THREE.WebGLRenderer( { antialias: false } );
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
|
renderer.gammaInput = true;
|
|
renderer.gammaOutput = true;
|
|
|
|
container.appendChild( renderer.domElement );
|
|
|
|
//
|
|
|
|
stats = new Stats();
|
|
stats.domElement.style.position = 'absolute';
|
|
stats.domElement.style.top = '0px';
|
|
container.appendChild( stats.domElement );
|
|
|
|
//
|
|
|
|
window.addEventListener( 'resize', onWindowResize, false );
|
|
|
|
}
|
|
|
|
function onWindowResize() {
|
|
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
|
camera.updateProjectionMatrix();
|
|
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
|
}
|
|
|
|
//
|
|
|
|
function animate() {
|
|
|
|
requestAnimationFrame( animate );
|
|
|
|
render();
|
|
stats.update();
|
|
|
|
}
|
|
|
|
function render() {
|
|
|
|
var time = Date.now() * 0.001;
|
|
|
|
//mesh.rotation.x = time * 0.25;
|
|
//mesh.rotation.y = time * 0.5;
|
|
parent_node.rotation.z = time * 0.5;
|
|
|
|
renderer.render( scene, camera );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
</body>
|
|
</html>
|