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<html>
<head>
</head>
<body>
<script type="module">
import * as THREE from './three.module.js';
import Stats from './stats.module.js';
let camera, scene, renderer, stats, de, s;
class FractalHeightMap {
constructor(width,decay) {
this.width = width;
let hmap = [];
for(let y = 0;y < width;++y) {
let xs = [];
for(let x = 0;x < width;++x) {
xs.push(null);
}
hmap.push(xs);
}
let len = 50;
hmap[0][0] = len;
hmap[width - 1][width - 1] = len;
hmap[width - 1][0] = len;
hmap[0][width - 1] = len;
this.fractal(hmap,0,width - 1,0,width - 1,50.0,decay);
for(let i = 1;i < width - 1;++i) {
for(let j = 1;j < width - 1;++j) {
hmap[i][j] = null;
}
}
for(let i = 0;i < width;++i) {
hmap[i][0] = hmap[i][width - 1];
hmap[0][i] = hmap[width - 1][i];
}
this.fractal(hmap,0,width - 1,0,width - 1,50.0,decay);
this.hmap = hmap;
}
fractal(hmap,x0,x1,y0,y1,amp,decay) {
let xx = Math.round((x0 + x1) / 2);
let yy = Math.round((y0 + y1) / 2);
if(hmap[x0][yy] == null) hmap[x0][yy] = (hmap[x0][y0] + hmap[x0][y1]) / 2 + amp * Math.random();
if(hmap[x1][yy] == null) hmap[x1][yy] = (hmap[x1][y0] + hmap[x1][y1]) / 2 + amp * Math.random();
if(hmap[xx][y0] == null) hmap[xx][y0] = (hmap[x0][y0] + hmap[x1][y0]) / 2 + amp * Math.random();
if(hmap[xx][y1] == null) hmap[xx][y1] = (hmap[x0][y1] + hmap[x1][y1]) / 2 + amp * Math.random();
if(hmap[xx][yy] == null) hmap[xx][yy] = (hmap[x0][y0] + hmap[x1][y0] + hmap[x0][y1] + hmap[x1][y1]) / 4 + amp * Math.random();
if(x0 != xx && x1 != xx && y0 != yy && y1 != yy) {
this.fractal(hmap,x0,xx,y0,yy,-amp * decay,decay);
this.fractal(hmap,xx,x1,y0,yy,-amp * decay,decay);
this.fractal(hmap,x0,xx,yy,y1,-amp * decay,decay);
this.fractal(hmap,xx,x1,yy,y1,-amp * decay,decay);
}
}
call(s,t) {
let i = Math.round(s * (this.width - 1));
let j = Math.round(t * (this.width - 1));
return this.hmap[i][j];
}
}
function doener(f,width,len) {
let xs = [];
let ys = [];
let uv = [];
for(let i = 0;i < width;++i) {
for(let j = 0;j < width;++j) {
let rad = Math.pow(j < width / 2 ? j / width : (width - 1 - j) / (width - 1),0.25);
rad = Math.pow(1 - Math.pow(j / (width - 1) * 2 - 1,2),0.1);
xs.push((rad * f.call(i / (width - 1),j / (width - 1)) + 1.0) * Math.cos(2 * Math.PI * i / (width - 1)));
xs.push((rad * f.call(i / (width - 1),j / (width - 1)) + 1.0) * Math.sin(2 * Math.PI * i / (width - 1)));
xs.push(10 * len * (j / width - 0.5));
if(i > 0) if(i < width) if(j > 0) if(j < width) {
ys.push(i * width + j);
ys.push((i - 1) * width + j);
ys.push((i - 1) * width + j - 1);
ys.push((i - 1) * width + j - 1);
ys.push(i * width + j - 1);
ys.push(i * width + j);
}
uv.push(i / (width - 1),j / (width - 1));
}
}
const geometry = new THREE.BufferGeometry();
geometry.setIndex( ys );
geometry.setAttribute( 'position', new THREE.Float32BufferAttribute(xs, 3 ) );
geometry.setAttribute( 'uv', new THREE.Float32BufferAttribute(uv, 2 ) );
geometry.computeVertexNormals();
return geometry;
}
function humanoid(f,material) {
let s = new THREE.Scene();
let n = Math.round(25 + 15 * Math.random());
let object = new THREE.Mesh(doener(f,n,50),material);
object.position.set(10,0,-10);
object.scale.set(0.1,0.1,0.05);
s.add(object);
object = new THREE.Mesh(doener(f,n,50),material);
object.position.set(-10,0,-10);
object.scale.set(0.1,0.1,0.05);
s.add(object);
object = new THREE.Mesh(doener(f,n,50),material);
object.position.set(10,0,-30);
object.scale.set(0.1,0.1,0.05);
s.add(object);
object = new THREE.Mesh(doener(f,n,50),material);
object.position.set(-10,0,-30);
object.scale.set(0.1,0.1,0.05);
s.add(object);
object = new THREE.Mesh(doener(f,n,50),material);
object.position.set(20,0,40);
object.scale.set(0.1,0.1,0.05);
object.rotation.set(0,1.5,0);
s.add(object);
object = new THREE.Mesh(doener(f,n,50),material);
object.position.set(-20,0,40);
object.scale.set(0.1,0.1,0.05);
object.rotation.set(0,1.5,0);
s.add(object);
object = new THREE.Mesh(doener(f,n,50),material);
object.position.set(40,0,40);
object.scale.set(0.1,0.1,0.05);
object.rotation.set(0,1.5,0);
s.add(object);
object = new THREE.Mesh(doener(f,n,50),material);
object.position.set(-40,0,40);
object.scale.set(0.1,0.1,0.05);
object.rotation.set(0,1.5,0);
s.add(object);
object = new THREE.Mesh(doener(f,n,50),material);
object.position.set(0,0,20);
object.scale.set(0.4,0.2,0.1);
s.add(object);
object = new THREE.Mesh(doener(f,n,50),material);
object.position.set(0,0,50);
object.scale.set(0.1,0.1,0.05);
s.add(object);
return s;
}
class HeightMap2 {
constructor(l) {
this.l = l;
}
call(s,t) {
let s2 = s;
let t2 = t;
s -= 0.25;
t -= 0.5;
s *= 10;
t *= 2;
s2 -= 0.75;
t2 -= 0.5;
s2 *= 10;
t2 *= 10;
return 1 / (1 + (s * s + t * t)) * 50 - 1 / (1 + (s2 * s2 + t2 * t2)) * 50 + 25;
}
}
class HeightMap3 {
constructor(l) {
this.l = l;
}
call(s,t) {
return Math.sin(this.l * Math.PI * 2 * s) * Math.sin(this.l * Math.PI * 2 * t) * 25 + 25.0;
}
}
function init() {
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
camera.position.y = 400;
scene = new THREE.Scene();
let object;
const ambientLight = new THREE.AmbientLight( 0xcccccc, 0.4 );
scene.add( ambientLight );
const pointLight = new THREE.PointLight( 0xffffff, 0.8 );
camera.add( pointLight );
scene.add( camera );
const map = new THREE.TextureLoader().load( 'textures/uv_grid_opengl.jpg' );
map.wrapS = map.wrapT = THREE.RepeatWrapping;
map.anisotropy = 16;
const material = new THREE.MeshPhongMaterial( { map: map, side: THREE.DoubleSide } );
s = humanoid(new FractalHeightMap(Math.round(25 + 15 * Math.random()),0.50 + 0.5 * Math.random()),material);
s.scale.set(2.5,2.5,2.5);
s.position.set(-200,0,0);
s.isScene = true;
scene.add(s);
s = humanoid(new HeightMap2(1),material);
s.scale.set(2.5,2.5,2.5);
s.position.set(200,0,0);
s.isScene = true;
scene.add(s);
s = humanoid(new HeightMap3(1),material);
s.scale.set(2.5,2.5,2.5);
s.position.set(0,0,200);
s.isScene = true;
scene.add(s);
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
de = renderer.domElement;
document.body.appendChild( de );
stats = new Stats();
document.body.appendChild( stats.dom );
//
window.addEventListener( 'resize', onWindowResize );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( 400, 400 );
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
scene.traverse( function ( object ) {
if ( object.isScene === true ) {
object.rotation.x += 0.05 * Math.random() + 0.0;
object.rotation.y += 0.05 * Math.random() + 0.0;
object.rotation.z += 0.05 * Math.random() + 0.0;
}
} );
const timer = Date.now() * 0.00001;
camera.position.x = Math.cos( timer ) * 600;
camera.position.z = Math.sin( timer ) * 600;
camera.lookAt( scene.position );
renderer.render( scene, camera );
}
init();
animate();
</script>
</body>
</html>