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webgl_geometry_extrude_shapes2.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - geometry - shapes extrusion via geodata</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link type="text/css" rel="stylesheet" href="main.css">
<style>
body {
color: #fff;
}
</style>
</head>
<body>
<div id="container"></div>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - shapes extrusion via geodata
</div>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"three": "../build/three.module.js",
"three/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as THREE from 'three';
import Stats from 'three/addons/libs/stats.module.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
// From d3-threeD.js
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
function d3threeD( exports ) {
const DEGS_TO_RADS = Math.PI / 180;
const DIGIT_0 = 48, DIGIT_9 = 57, COMMA = 44, SPACE = 32, PERIOD = 46, MINUS = 45;
exports.transformSVGPath = function transformSVGPath( pathStr ) {
const path = new THREE.ShapePath();
let idx = 1, activeCmd,
x = 0, y = 0, nx = 0, ny = 0, firstX = null, firstY = null,
x1 = 0, x2 = 0, y1 = 0, y2 = 0,
rx = 0, ry = 0, xar = 0, laf = 0, sf = 0, cx, cy;
const len = pathStr.length;
function eatNum() {
let sidx, c, isFloat = false, s;
// eat delims
while ( idx < len ) {
c = pathStr.charCodeAt( idx );
if ( c !== COMMA && c !== SPACE ) break;
idx ++;
}
if ( c === MINUS ) {
sidx = idx ++;
} else {
sidx = idx;
}
// eat number
while ( idx < len ) {
c = pathStr.charCodeAt( idx );
if ( DIGIT_0 <= c && c <= DIGIT_9 ) {
idx ++;
continue;
} else if ( c === PERIOD ) {
idx ++;
isFloat = true;
continue;
}
s = pathStr.substring( sidx, idx );
return isFloat ? parseFloat( s ) : parseInt( s );
}
s = pathStr.substring( sidx );
return isFloat ? parseFloat( s ) : parseInt( s );
}
function nextIsNum() {
let c;
// do permanently eat any delims...
while ( idx < len ) {
c = pathStr.charCodeAt( idx );
if ( c !== COMMA && c !== SPACE ) break;
idx ++;
}
c = pathStr.charCodeAt( idx );
return ( c === MINUS || ( DIGIT_0 <= c && c <= DIGIT_9 ) );
}
let canRepeat;
activeCmd = pathStr[ 0 ];
while ( idx <= len ) {
canRepeat = true;
switch ( activeCmd ) {
// moveto commands, become lineto's if repeated
case 'M':
x = eatNum();
y = eatNum();
path.moveTo( x, y );
activeCmd = 'L';
firstX = x;
firstY = y;
break;
case 'm':
x += eatNum();
y += eatNum();
path.moveTo( x, y );
activeCmd = 'l';
firstX = x;
firstY = y;
break;
case 'Z':
case 'z':
canRepeat = false;
if ( x !== firstX || y !== firstY ) path.lineTo( firstX, firstY );
break;
// - lines!
case 'L':
case 'H':
case 'V':
nx = ( activeCmd === 'V' ) ? x : eatNum();
ny = ( activeCmd === 'H' ) ? y : eatNum();
path.lineTo( nx, ny );
x = nx;
y = ny;
break;
case 'l':
case 'h':
case 'v':
nx = ( activeCmd === 'v' ) ? x : ( x + eatNum() );
ny = ( activeCmd === 'h' ) ? y : ( y + eatNum() );
path.lineTo( nx, ny );
x = nx;
y = ny;
break;
// - cubic bezier
case 'C':
x1 = eatNum(); y1 = eatNum();
case 'S':
if ( activeCmd === 'S' ) {
x1 = 2 * x - x2;
y1 = 2 * y - y2;
}
x2 = eatNum();
y2 = eatNum();
nx = eatNum();
ny = eatNum();
path.bezierCurveTo( x1, y1, x2, y2, nx, ny );
x = nx; y = ny;
break;
case 'c':
x1 = x + eatNum();
y1 = y + eatNum();
case 's':
if ( activeCmd === 's' ) {
x1 = 2 * x - x2;
y1 = 2 * y - y2;
}
x2 = x + eatNum();
y2 = y + eatNum();
nx = x + eatNum();
ny = y + eatNum();
path.bezierCurveTo( x1, y1, x2, y2, nx, ny );
x = nx; y = ny;
break;
// - quadratic bezier
case 'Q':
x1 = eatNum(); y1 = eatNum();
case 'T':
if ( activeCmd === 'T' ) {
x1 = 2 * x - x1;
y1 = 2 * y - y1;
}
nx = eatNum();
ny = eatNum();
path.quadraticCurveTo( x1, y1, nx, ny );
x = nx;
y = ny;
break;
case 'q':
x1 = x + eatNum();
y1 = y + eatNum();
case 't':
if ( activeCmd === 't' ) {
x1 = 2 * x - x1;
y1 = 2 * y - y1;
}
nx = x + eatNum();
ny = y + eatNum();
path.quadraticCurveTo( x1, y1, nx, ny );
x = nx; y = ny;
break;
// - elliptical arc
case 'A':
rx = eatNum();
ry = eatNum();
xar = eatNum() * DEGS_TO_RADS;
laf = eatNum();
sf = eatNum();
nx = eatNum();
ny = eatNum();
if ( rx !== ry ) console.warn( 'Forcing elliptical arc to be a circular one:', rx, ry );
// SVG implementation notes does all the math for us! woo!
// http://www.w3.org/TR/SVG/implnote.html#ArcImplementationNotes
// step1, using x1 as x1'
x1 = Math.cos( xar ) * ( x - nx ) / 2 + Math.sin( xar ) * ( y - ny ) / 2;
y1 = - Math.sin( xar ) * ( x - nx ) / 2 + Math.cos( xar ) * ( y - ny ) / 2;
// step 2, using x2 as cx'
let norm = Math.sqrt( ( rx * rx * ry * ry - rx * rx * y1 * y1 - ry * ry * x1 * x1 ) /
( rx * rx * y1 * y1 + ry * ry * x1 * x1 ) );
if ( laf === sf ) norm = - norm;
x2 = norm * rx * y1 / ry;
y2 = norm * - ry * x1 / rx;
// step 3
cx = Math.cos( xar ) * x2 - Math.sin( xar ) * y2 + ( x + nx ) / 2;
cy = Math.sin( xar ) * x2 + Math.cos( xar ) * y2 + ( y + ny ) / 2;
const u = new THREE.Vector2( 1, 0 );
const v = new THREE.Vector2( ( x1 - x2 ) / rx, ( y1 - y2 ) / ry );
let startAng = Math.acos( u.dot( v ) / u.length() / v.length() );
if ( ( ( u.x * v.y ) - ( u.y * v.x ) ) < 0 ) startAng = - startAng;
// we can reuse 'v' from start angle as our 'u' for delta angle
u.x = ( - x1 - x2 ) / rx;
u.y = ( - y1 - y2 ) / ry;
let deltaAng = Math.acos( v.dot( u ) / v.length() / u.length() );
// This normalization ends up making our curves fail to triangulate...
if ( ( ( v.x * u.y ) - ( v.y * u.x ) ) < 0 ) deltaAng = - deltaAng;
if ( ! sf && deltaAng > 0 ) deltaAng -= Math.PI * 2;
if ( sf && deltaAng < 0 ) deltaAng += Math.PI * 2;
path.absarc( cx, cy, rx, startAng, startAng + deltaAng, sf );
x = nx;
y = ny;
break;
default:
throw new Error( 'Wrong path command: ' + activeCmd );
}
// just reissue the command
if ( canRepeat && nextIsNum() ) continue;
activeCmd = pathStr[ idx ++ ];
}
return path;
};
}
const $d3g = {};
d3threeD( $d3g );
/// Part from g0v/twgeojson
/// Graphic Engine and Geo Data Init Functions
const addGeoObject = function ( group, svgObject ) {
const paths = svgObject.paths;
const depths = svgObject.depths;
const colors = svgObject.colors;
const center = svgObject.center;
for ( let i = 0; i < paths.length; i ++ ) {
const path = $d3g.transformSVGPath( paths[ i ] );
const color = new THREE.Color( colors[ i ] );
const material = new THREE.MeshLambertMaterial( {
color: color,
emissive: color
} );
const depth = depths[ i ];
const simpleShapes = path.toShapes( true );
for ( let j = 0; j < simpleShapes.length; j ++ ) {
const simpleShape = simpleShapes[ j ];
const shape3d = new THREE.ExtrudeGeometry( simpleShape, {
depth: depth,
bevelEnabled: false
} );
const mesh = new THREE.Mesh( shape3d, material );
mesh.rotation.x = Math.PI;
mesh.translateZ( - depth - 1 );
mesh.translateX( - center.x );
mesh.translateY( - center.y );
group.add( mesh );
}
}
};
let renderer, stats, scene, camera;
init();
animate();
//
function init() {
const container = document.getElementById( 'container' );
//
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xb0b0b0 );
//
camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.set( 0, 0, 200 );
//
const group = new THREE.Group();
scene.add( group );
//
const directionalLight = new THREE.DirectionalLight( 0xffffff, 0.6 );
directionalLight.position.set( 0.75, 0.75, 1.0 ).normalize();
scene.add( directionalLight );
const ambientLight = new THREE.AmbientLight( 0xcccccc, 0.2 );
scene.add( ambientLight );
//
const helper = new THREE.GridHelper( 160, 10 );
helper.rotation.x = Math.PI / 2;
group.add( helper );
//
const obj = initSVGObject();
addGeoObject( group, obj );
//
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
//
const controls = new OrbitControls( camera, renderer.domElement );
controls.minDistance = 100;
controls.maxDistance = 1000;
//
stats = new Stats();
container.appendChild( stats.dom );
//
window.addEventListener( 'resize', onWindowResize );
}
function initSVGObject() {
const obj = {};
/// The geo data from Taipei City, Keelung City, Taipei County in SVG form
obj.paths = [
/// Taipei City
'M366.2182,108.9780 L368.0329,110.3682 L367.5922,112.4411 L369.9258,116.0311 L368.9827,117.3543 ' +
'L371.5686,119.8491 L370.5599,121.7206 L372.9314,124.8009 L368.8889,126.7603 L369.2695,130.7622 ' +
'L366.1499,130.3388 L363.4698,128.1161 L362.9256,125.6018 L360.8153,126.4025 L360.2968,124.3588 ' +
'L361.9519,121.1623 L360.4475,118.7162 L358.1163,117.8678 L358.7094,115.7577 L361.6243,112.4576 Z',
/// Keelung City
'M380.2689,113.3850 L383.5604,114.2370 L383.7404,114.2386 L385.4082,115.6247 L384.9725,117.4631 ' +
'L381.6681,117.9439 L383.0209,121.0914 L379.4649,122.7061 L373.4987,118.8487 L372.0980,114.7589 ' +
'L377.9716,112.0707 Z',
/// Taipei County
'M359.4486,155.6690 L357.0422,152.7420 L355.1688,148.0173 L357.1186,145.8045 L354.1323,141.2242 ' +
'L351.1807,141.6609 L348.9387,140.5372 L349.5415,137.8396 L347.5174,136.1694 L347.6299,129.2327 ' +
'L351.4192,128.8067 L354.2518,125.3113 L352.5805,121.8038 L349.3190,120.9429 L344.3277,116.7676 ' +
'L350.9772,115.1221 L354.5759,112.5371 L354.5667,110.6949 L357.4098,105.7489 L362.3963,101.8443 ' +
'L364.4415,101.0819 L364.5314,101.0828 L364.6209,101.1230 L364.7698,101.2029 L368.1221,101.5115 ' +
'L371.7216,104.1338 L372.2958,106.7261 L375.5949,109.6971 L377.0415,108.8875 L377.0737,108.6526 ' +
'L377.4037,108.6165 L376.8840,109.7091 L376.7323,109.9037 L377.9416,112.0705 L371.7970,114.8736 ' +
'L374.0935,119.4031 L380.7848,122.7963 L382.6529,121.9897 L381.5792,117.8256 L385.0339,117.3069 ' +
'L385.4082,115.6247 L388.7014,116.3969 L389.8697,116.6024 L390.0206,116.4860 L391.0396,116.6118 ' +
'L394.6665,116.9929 L394.4694,119.2255 L394.3172,119.4987 L395.3792,121.8977 L395.2728,124.0526 ' +
'L397.2123,125.6350 L401.1709,126.2516 L401.2612,126.2130 L401.4086,126.6060 L400.1992,127.7733 ' +
'L399.7769,128.0446 L399.6247,128.3179 L398.1779,129.0521 L394.2418,129.2969 L388.7324,130.9385 ' +
'L389.2782,134.0003 L383.7237,137.0111 L381.7445,139.9336 L379.7001,139.9546 L376.1539,143.0580 ' +
'L371.3022,144.1094 L368.6009,146.5914 L368.7361,151.1399 L363.6153,154.4980 ' +
/// Taipei County hole.
'M363.4600,128.3904 L366.6300,130.3829 L369.3732,129.3913 L369.5603,125.6695 L374.3989,125.1677 ' +
'L370.8412,123.6440 L371.0684,118.8252 L369.0431,117.3157 L369.6882,115.7936 L367.8578,112.8749 ' +
'L368.1217,110.4867 L366.5152,109.2554 L361.9554,112.3435 L358.1163,117.8678 L361.7218,120.2192 ' +
'L360.7261,126.3232 L362.8064,125.5221 Z' ];
obj.depths = [ 19, 20, 21 ];
obj.colors = [ 0xC07000, 0xC08000, 0xC0A000 ];
obj.center = { x: 365, y: 125 };
return obj;
}
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() {
renderer.render( scene, camera );
}
</script>
</body>
</html>