356 lines
14 KiB
JavaScript
356 lines
14 KiB
JavaScript
'use strict';
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import * as Vector from './js/vectorlib.js';
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import * as Bezier from './js/bezierlib.js';
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import * as Utils from './js/utillib.js';
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// CONFIG
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const bezierGradeResolution = 80;
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const bezierLengthResolution = 80;
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const bezierCurvatureResolution = 80;
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const padding = 500;
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const zoomFactor = 1.2;
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const trackWidth = {
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base: 110,
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min: 3,
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max: 90,
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}
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const signSize = {
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base: 4,
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min: 0.05,
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max: 2.4
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}
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const scaleCullThresholds = [
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{scale:1, distance:500},
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{scale:1.25, distance:200},
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{scale:1.5, distance:130},
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{scale:2.5, distance:80},
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{scale:5, distance:40},
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{scale:20, distance:20},
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{scale:60, distance:10},
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];
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// CODE
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const map = document.getElementById('map');
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const map_container = document.getElementById('mapContainer');
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const zoomLevelDisplay = document.getElementById('zoomLevelDisplay');
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const styleRoot = document.querySelector(':root');
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const svgns = map.getAttribute('xmlns');
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const map_rails = document.createElementNS(svgns, 'g');
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map_rails.setAttribute('id', 'map_rails');
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map.appendChild(map_rails);
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const map_markers = document.createElementNS(svgns, 'g');
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map_markers.setAttribute('id', 'map_markers');
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map.appendChild(map_markers);
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let mapData = [];
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let poiData = [];
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let tracks = [];
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let markers = [];
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let currentMapNav = {};
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let previousMapScale = -1;
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document.addEventListener('DOMContentLoaded', async () => {
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await loadTrackData('trackdata_dv.json');
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mapScrollSetup();
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});
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async function loadTrackData(file){
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mapData = await (await fetch(new Request(file))).json();
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establishDimensions();
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fillSvg();
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}
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/** Handling for the map scrolling and zooming */
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function mapScrollSetup(){
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let mapNav = {x:currentMapNav.x, y:currentMapNav.y, scale:currentMapNav.scale};
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let prevMouse = {x:mapNav.x, y:mapNav.y, scale:mapNav.scale};
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let scrollDat = {ticking:false};
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const mouseDownHandler = e => {
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map_container.style.cursor = 'grabbing';
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prevMouse.x = e.clientX;
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prevMouse.y = e.clientY;
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document.addEventListener('mousemove', mouseMoveHandler);
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document.addEventListener('mouseup', mouseUpHandler);
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};
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const mouseMoveHandler = e => {
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mapNav.x += prevMouse.x-e.clientX;
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mapNav.y += prevMouse.y-e.clientY;
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updateMapview(mapNav);
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prevMouse.x = e.clientX;
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prevMouse.y = e.clientY;
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};
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const mouseUpHandler = () => {
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map_container.style.removeProperty('cursor');
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document.removeEventListener('mousemove', mouseMoveHandler);
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document.removeEventListener('mouseup', mouseUpHandler);
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};
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const zoomHandler = e => {
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if(!scrollDat.ticking){
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scrollDat.ticking = true;
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let rect = map_container.getBoundingClientRect();
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let cursorLocal = {
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x: -e.clientX - rect.left,
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y: -e.clientY - rect.top
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};
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let scaleMult = 1;
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if(e.deltaY < 0){
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scaleMult = zoomFactor;
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}else if(e.deltaY > 0){
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scaleMult = 1/zoomFactor;
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}
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mapNav.x = cursorLocal.x - scaleMult * (cursorLocal.x-mapNav.x);
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mapNav.y = cursorLocal.y - scaleMult * (cursorLocal.y-mapNav.y);
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mapNav.scale *= scaleMult;
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updateMapview(mapNav);
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setTimeout(() => {
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scrollDat.ticking = false;
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}, 20);
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}
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};
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map_container.addEventListener('mousedown', mouseDownHandler);
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map_container.addEventListener('wheel', zoomHandler);
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}
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/** Readjust map view to focus on position */
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function updateMapview(navData = {x:0, y:0, scale:1}){
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currentMapNav = navData;
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map.style.transform = `translate(${-navData.x}px, ${-navData.y}px) scale(${navData.scale})`;
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if(navData.scale !== previousMapScale){
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zoomLevelDisplay.innerHTML = `Zoom: ${Math.round(navData.scale*100)/100}x`;
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let dirtyScale = previousMapScale < 0;
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for(const cullThreshold of scaleCullThresholds){
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if(dirtyScale || (previousMapScale < cullThreshold.scale && navData.scale > cullThreshold.scale) || (previousMapScale > cullThreshold.scale && navData.scale < cullThreshold.scale)){
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dirtyScale = true;
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break;
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}
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}
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map_rails.setAttribute('stroke-width', Utils.clamp(trackWidth.base/navData.scale, trackWidth.min, trackWidth.max));
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styleRoot.style.setProperty('--signScale', Utils.clamp(signSize.base/navData.scale, signSize.min, signSize.max));
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if(dirtyScale){
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for(let i=0; i<scaleCullThresholds.length; i++){
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styleRoot.style.setProperty(`--cullThreshold_state_${i}`, navData.scale >= scaleCullThresholds[i].scale ? 'initial' : 'none')
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}
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}
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previousMapScale = navData.scale;
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}
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}
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/** Get the bounding box of all the tracks, and set the map bounds accordingly. Also flips the Y axis.
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* **Note:** Does NOT evaluate beziers, uses the control points only.
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*/
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function establishDimensions(){
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let minX = Infinity;
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let minY = Infinity;
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let minAlt = Infinity;
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let maxX = -Infinity;
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let maxY = -Infinity;
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let maxAlt = -Infinity;
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for(const obj of mapData){
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for(const point of obj.points){
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minX = Math.min(minX, point[0].x, point[1].x, point[2].x);
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minY = Math.min(minY, point[0].z, point[1].z, point[2].z);
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minAlt = Math.min(minAlt, point[0].y, point[1].y, point[2].y);
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maxX = Math.max(maxX, point[0].x, point[1].x, point[2].x);
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maxY = Math.max(maxY, point[0].z, point[1].z, point[2].z);
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maxAlt = Math.max(maxAlt, point[0].y, point[1].y, point[2].y);
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}
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}
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let width = maxX-minX;
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let height = maxY-minY;
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map.setAttribute('viewBox', `${minX-padding} ${minY-padding} ${width+2*padding} ${height+2*padding}`);
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updateMapview({
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x: map.clientWidth/2-map_container.clientWidth/2,
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y: map.clientHeight/2-map_container.clientHeight/2,
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scale: 1
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});
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console.log(`(${minX}, ${minY}) to (${maxX}, ${maxY}). Altitude from ${minAlt} to ${maxAlt}`);
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// Flip the z coordinate so the map doesn't display upside-down
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for(const obj of mapData){
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for(const point of obj.points){
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point[0].z = minY+maxY-point[0].z;
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point[1].z = minY+maxY-point[1].z;
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point[2].z = minY+maxY-point[2].z;
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}
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}
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}
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/** Populate the SVG data */
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function fillSvg(){
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for(const obj of mapData){
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switch(obj.type){
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case 'bezier':
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drawTracks(obj);
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break;
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}
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}
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sortTracks();
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cleanMarkers();
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drawMarkers();
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}
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/** Insert individual rail paths, as well as creating signage data for each path*/
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function drawTracks(bezierData){
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const trackCol = Utils.rgba2hex(Math.random(),Math.random(),Math.random(),1.0);
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for(let i=0; i+1<bezierData.points.length; i++){
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const bezStart = bezierData.points[i][0];
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const bezHandle1 = bezierData.points[i][2];
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const bezHandle2 = bezierData.points[i+1][1];
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const bezEnd = bezierData.points[i+1][0];
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let newBezier = document.createElementNS(svgns, 'path');
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let genPath = 'M ';
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genPath += `${bezStart.x} ${bezStart.z} `;
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genPath += `C ${bezHandle1.x} ${bezHandle1.z} ${bezHandle2.x} ${bezHandle2.z} ${bezEnd.x} ${bezEnd.z} `;
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let grade = Bezier.estimateMaxGrade(bezStart, bezHandle1, bezHandle2, bezEnd, bezierGradeResolution);
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let gradeClass = Utils.gradeToClass(grade);
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let length = Bezier.estimateLength(bezStart, bezHandle1, bezHandle2, bezEnd, bezierLengthResolution);
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let curvature = Bezier.estimateMaxCurvature(bezStart, bezHandle1, bezHandle2, bezEnd, bezierCurvatureResolution);
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newBezier.setAttribute('d', genPath);
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newBezier.classList.add('rail');
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newBezier.classList.add(gradeClass ?? 'grade_flat');
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//newBezier.setAttribute('stroke', Utils.rgba2hex(grade*50*0,(bezStart.y-113)/(252-113),length*0.01*0,1.0));
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//newBezier.setAttribute('stroke', Utils.rgba2hex((1/curvature) * 100,0,0,1.0));
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//newBezier.setAttribute('stroke', trackCol);
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//newBezier.setAttribute('data-grade', grade);
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//newBezier.setAttribute('data-length', length);
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//newBezier.setAttribute('data-maxradius', 1/curvature);
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tracks.push([(bezStart.y+bezEnd.y)*0.5, newBezier]);
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// Curve tooltip
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let title = document.createElementNS(svgns, 'title');
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title.innerHTML = [
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`"${bezierData.name}"`,
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`Max Grade: ${Math.round(grade*1000)/10}%`,
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`Min Radius: ${Math.round(1/curvature)} meters`,
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`Top Speed: ${Utils.radiusToSpeed(1/curvature)} km/h`,
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`Length: ${Math.round(length*10)/10} meters`,
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`Altitude: ${Math.round((bezStart.y+bezEnd.y)*0.5)} meters`,
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].join('\n');
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newBezier.appendChild(title);
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// Add Signage
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if(grade > 0.001){
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markers.push({
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type: 'grade',
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value: grade,
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class: gradeClass,
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position: Bezier.evaluatePoint(bezStart, bezHandle1, bezHandle2, bezEnd, 0.5),
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tangent: grade > 0
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?
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Bezier.evaluateVelocity(bezStart, bezHandle1, bezHandle2, bezEnd, 0.5)
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:
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Bezier.evaluateVelocity(bezEnd, bezHandle2, bezHandle1,bezStart, 0.5)
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});
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}
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markers.push({
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type: 'speed',
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value: Utils.radiusToSpeed(1/curvature),
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position: Bezier.evaluatePoint(bezStart, bezHandle1, bezHandle2, bezEnd, 0.5),
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tangent: Bezier.evaluateVelocity(bezStart, bezHandle1, bezHandle2, bezEnd, 0.5)
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});
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}
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}
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/** Sort the tracks and put them into the svg */
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function sortTracks(){
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tracks.sort((a,b) => {
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return a[0]-b[0];
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});
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for(const track of tracks){
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map_rails.appendChild(track[1]);
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}
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}
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/** Hide extraneous signage, reducing clutter. */
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function cleanMarkers(){
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let roughDist = 0;
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for(let i=0; i<markers.length; i++){
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markers[i].crowdingScore = 0;
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markers[i].nearestDist = 100000;
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for(let j=0; j<markers.length; j++){
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if(i != j && markers[i].type == markers[j].type){
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roughDist = Vector.roughDistance(markers[i].position, markers[j].position);
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markers[i].crowdingScore += 1/roughDist;
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if(roughDist < markers[i].nearestDist){
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markers[i].nearestDist = roughDist;
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markers[i].nearest = markers[j];
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}
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}
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}
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//let randomZoomThreshold = Utils.randomRange(1, 5);
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//if(randomZoomThreshold < 4) markers[i].skip = true;
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/*
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for(let j=0; j<markers.length; j++){
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if(i != j && !markers[j].skip && markers[i].type == markers[j].type){
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if(Vector.isWithinAARange(markers[i].position, markers[j].position, 120)){
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if(markers[i].type == 'grade'){
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if(Math.abs(markers[j].value) > Math.abs(markers[i].value)) markers[i].skip = true;
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else markers[j].skip = true;
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}else if(markers[i].type == 'speed'){
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if(markers[j].value > markers[i].value) markers[j].skip = true;
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else markers[i].skip = true;
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}
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}
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}
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}*/
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}
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}
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/** Create the signage */
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function drawMarkers(){
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const gradeSigns = document.createElementNS(svgns, 'g');
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gradeSigns.setAttribute('id', 'grade_signs');
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map_markers.appendChild(gradeSigns);
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const speedSigns = document.createElementNS(svgns, 'g');
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speedSigns.setAttribute('id', 'speed_signs');
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map_markers.appendChild(speedSigns);
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for(const markerData of markers){
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//if(markerData.skip) continue;
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let marker = document.createElementNS(svgns, 'g');
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let markerImg = document.createElementNS(svgns, 'use');
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let title = document.createElementNS(svgns, 'title');
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marker.appendChild(markerImg);
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marker.appendChild(title);
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marker.setAttribute('transform', `translate(${markerData.position.x} ${markerData.position.z})`);
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// Grade signs
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if(markerData.type == 'grade'){
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markerImg.setAttribute('href', '#gradeArrow');
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markerImg.classList.add('sign', 'gradeSign');
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if(markerData.class) markerImg.classList.add(markerData.class);
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const tanLen = Math.sqrt(markerData.tangent.x*markerData.tangent.x + markerData.tangent.z*markerData.tangent.z) * Math.sign(markerData.tangent.y);
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const rot = Math.atan2(markerData.tangent.x/tanLen, -markerData.tangent.z/tanLen) * (180/Math.PI);
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marker.setAttribute('transform', `translate(${markerData.position.x} ${markerData.position.z}) rotate(${rot})`);
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title.innerHTML = `${Math.round(markerData.value*1000)/10}%`;
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gradeSigns.appendChild(marker);
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// Speed Signs
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}else if(markerData.type == 'speed'){
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markerImg.setAttribute('href', `#speedSign_${Math.round(markerData.value/10)}`);
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markerImg.classList.add('sign', 'speedSign');
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title.innerHTML = `${Math.round(markerData.value)} km/h`;
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/*let offset = Vector.normalize({x:markerData.tangent.z, y:0, z:-markerData.tangent.x});
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marker.setAttribute('transform', `translate(${markerData.position.x + offset.x*100} ${markerData.position.z + offset.z*50})`);*/
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marker.setAttribute('transform', `translate(${markerData.position.x} ${markerData.position.z})`);
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speedSigns.appendChild(marker);
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}
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for(let i=scaleCullThresholds.length-1; i>= 0; i--){
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if(markerData.nearestDist < scaleCullThresholds[i].distance || i==0){
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title.innerHTML += `\n${markerData.nearestDist}`;
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marker.classList.add(`cullThreshold_${i}`);
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break;
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}
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}
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}
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} |