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535 lines
13 KiB
535 lines
13 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - geometry - shapes extrusion via geodata</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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<style>
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body {
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color: #fff;
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}
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</style>
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</head>
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<body>
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<div id="container"></div>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - shapes extrusion via geodata
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</div>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import Stats from 'three/addons/libs/stats.module.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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// From d3-threeD.js
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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function d3threeD( exports ) {
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const DEGS_TO_RADS = Math.PI / 180;
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const DIGIT_0 = 48, DIGIT_9 = 57, COMMA = 44, SPACE = 32, PERIOD = 46, MINUS = 45;
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exports.transformSVGPath = function transformSVGPath( pathStr ) {
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const path = new THREE.ShapePath();
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let idx = 1, activeCmd,
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x = 0, y = 0, nx = 0, ny = 0, firstX = null, firstY = null,
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x1 = 0, x2 = 0, y1 = 0, y2 = 0,
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rx = 0, ry = 0, xar = 0, laf = 0, sf = 0, cx, cy;
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const len = pathStr.length;
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function eatNum() {
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let sidx, c, isFloat = false, s;
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// eat delims
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while ( idx < len ) {
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c = pathStr.charCodeAt( idx );
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if ( c !== COMMA && c !== SPACE ) break;
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idx ++;
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}
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if ( c === MINUS ) {
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sidx = idx ++;
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} else {
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sidx = idx;
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}
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// eat number
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while ( idx < len ) {
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c = pathStr.charCodeAt( idx );
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if ( DIGIT_0 <= c && c <= DIGIT_9 ) {
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idx ++;
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continue;
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} else if ( c === PERIOD ) {
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idx ++;
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isFloat = true;
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continue;
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}
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s = pathStr.substring( sidx, idx );
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return isFloat ? parseFloat( s ) : parseInt( s );
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}
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s = pathStr.substring( sidx );
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return isFloat ? parseFloat( s ) : parseInt( s );
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}
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function nextIsNum() {
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let c;
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// do permanently eat any delims...
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while ( idx < len ) {
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c = pathStr.charCodeAt( idx );
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if ( c !== COMMA && c !== SPACE ) break;
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idx ++;
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}
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c = pathStr.charCodeAt( idx );
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return ( c === MINUS || ( DIGIT_0 <= c && c <= DIGIT_9 ) );
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}
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let canRepeat;
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activeCmd = pathStr[ 0 ];
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while ( idx <= len ) {
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canRepeat = true;
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switch ( activeCmd ) {
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// moveto commands, become lineto's if repeated
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case 'M':
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x = eatNum();
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y = eatNum();
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path.moveTo( x, y );
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activeCmd = 'L';
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firstX = x;
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firstY = y;
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break;
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case 'm':
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x += eatNum();
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y += eatNum();
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path.moveTo( x, y );
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activeCmd = 'l';
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firstX = x;
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firstY = y;
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break;
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case 'Z':
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case 'z':
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canRepeat = false;
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if ( x !== firstX || y !== firstY ) path.lineTo( firstX, firstY );
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break;
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// - lines!
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case 'L':
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case 'H':
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case 'V':
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nx = ( activeCmd === 'V' ) ? x : eatNum();
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ny = ( activeCmd === 'H' ) ? y : eatNum();
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path.lineTo( nx, ny );
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x = nx;
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y = ny;
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break;
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case 'l':
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case 'h':
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case 'v':
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nx = ( activeCmd === 'v' ) ? x : ( x + eatNum() );
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ny = ( activeCmd === 'h' ) ? y : ( y + eatNum() );
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path.lineTo( nx, ny );
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x = nx;
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y = ny;
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break;
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// - cubic bezier
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case 'C':
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x1 = eatNum(); y1 = eatNum();
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case 'S':
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if ( activeCmd === 'S' ) {
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x1 = 2 * x - x2;
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y1 = 2 * y - y2;
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}
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x2 = eatNum();
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y2 = eatNum();
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nx = eatNum();
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ny = eatNum();
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path.bezierCurveTo( x1, y1, x2, y2, nx, ny );
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x = nx; y = ny;
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break;
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case 'c':
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x1 = x + eatNum();
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y1 = y + eatNum();
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case 's':
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if ( activeCmd === 's' ) {
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x1 = 2 * x - x2;
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y1 = 2 * y - y2;
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}
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x2 = x + eatNum();
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y2 = y + eatNum();
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nx = x + eatNum();
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ny = y + eatNum();
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path.bezierCurveTo( x1, y1, x2, y2, nx, ny );
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x = nx; y = ny;
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break;
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// - quadratic bezier
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case 'Q':
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x1 = eatNum(); y1 = eatNum();
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case 'T':
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if ( activeCmd === 'T' ) {
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x1 = 2 * x - x1;
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y1 = 2 * y - y1;
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}
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nx = eatNum();
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ny = eatNum();
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path.quadraticCurveTo( x1, y1, nx, ny );
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x = nx;
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y = ny;
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break;
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case 'q':
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x1 = x + eatNum();
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y1 = y + eatNum();
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case 't':
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if ( activeCmd === 't' ) {
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x1 = 2 * x - x1;
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y1 = 2 * y - y1;
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}
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nx = x + eatNum();
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ny = y + eatNum();
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path.quadraticCurveTo( x1, y1, nx, ny );
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x = nx; y = ny;
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break;
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// - elliptical arc
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case 'A':
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rx = eatNum();
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ry = eatNum();
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xar = eatNum() * DEGS_TO_RADS;
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laf = eatNum();
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sf = eatNum();
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nx = eatNum();
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ny = eatNum();
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if ( rx !== ry ) console.warn( 'Forcing elliptical arc to be a circular one:', rx, ry );
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// SVG implementation notes does all the math for us! woo!
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// http://www.w3.org/TR/SVG/implnote.html#ArcImplementationNotes
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// step1, using x1 as x1'
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x1 = Math.cos( xar ) * ( x - nx ) / 2 + Math.sin( xar ) * ( y - ny ) / 2;
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y1 = - Math.sin( xar ) * ( x - nx ) / 2 + Math.cos( xar ) * ( y - ny ) / 2;
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// step 2, using x2 as cx'
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let norm = Math.sqrt( ( rx * rx * ry * ry - rx * rx * y1 * y1 - ry * ry * x1 * x1 ) /
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( rx * rx * y1 * y1 + ry * ry * x1 * x1 ) );
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if ( laf === sf ) norm = - norm;
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x2 = norm * rx * y1 / ry;
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y2 = norm * - ry * x1 / rx;
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// step 3
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cx = Math.cos( xar ) * x2 - Math.sin( xar ) * y2 + ( x + nx ) / 2;
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cy = Math.sin( xar ) * x2 + Math.cos( xar ) * y2 + ( y + ny ) / 2;
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const u = new THREE.Vector2( 1, 0 );
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const v = new THREE.Vector2( ( x1 - x2 ) / rx, ( y1 - y2 ) / ry );
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let startAng = Math.acos( u.dot( v ) / u.length() / v.length() );
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if ( ( ( u.x * v.y ) - ( u.y * v.x ) ) < 0 ) startAng = - startAng;
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// we can reuse 'v' from start angle as our 'u' for delta angle
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u.x = ( - x1 - x2 ) / rx;
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u.y = ( - y1 - y2 ) / ry;
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let deltaAng = Math.acos( v.dot( u ) / v.length() / u.length() );
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// This normalization ends up making our curves fail to triangulate...
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if ( ( ( v.x * u.y ) - ( v.y * u.x ) ) < 0 ) deltaAng = - deltaAng;
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if ( ! sf && deltaAng > 0 ) deltaAng -= Math.PI * 2;
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if ( sf && deltaAng < 0 ) deltaAng += Math.PI * 2;
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path.absarc( cx, cy, rx, startAng, startAng + deltaAng, sf );
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x = nx;
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y = ny;
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break;
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default:
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throw new Error( 'Wrong path command: ' + activeCmd );
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}
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// just reissue the command
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if ( canRepeat && nextIsNum() ) continue;
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activeCmd = pathStr[ idx ++ ];
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}
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return path;
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};
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}
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const $d3g = {};
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d3threeD( $d3g );
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/// Part from g0v/twgeojson
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/// Graphic Engine and Geo Data Init Functions
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const addGeoObject = function ( group, svgObject ) {
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const paths = svgObject.paths;
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const depths = svgObject.depths;
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const colors = svgObject.colors;
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const center = svgObject.center;
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for ( let i = 0; i < paths.length; i ++ ) {
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const path = $d3g.transformSVGPath( paths[ i ] );
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const color = new THREE.Color( colors[ i ] );
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const material = new THREE.MeshLambertMaterial( {
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color: color,
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emissive: color
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} );
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const depth = depths[ i ];
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const simpleShapes = path.toShapes( true );
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for ( let j = 0; j < simpleShapes.length; j ++ ) {
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const simpleShape = simpleShapes[ j ];
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const shape3d = new THREE.ExtrudeGeometry( simpleShape, {
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depth: depth,
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bevelEnabled: false
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} );
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const mesh = new THREE.Mesh( shape3d, material );
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mesh.rotation.x = Math.PI;
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mesh.translateZ( - depth - 1 );
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mesh.translateX( - center.x );
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mesh.translateY( - center.y );
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group.add( mesh );
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}
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}
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};
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let renderer, stats, scene, camera;
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init();
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animate();
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//
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function init() {
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const container = document.getElementById( 'container' );
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//
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0xb0b0b0 );
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//
|
||
|
|
|
||
|
|
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>
|