nxiaoxiao
1 year ago
parent
d2f59ebc42
commit
d4169af3ea
@ -1,32 +0,0 @@
|
||||
web:
|
||||
image: nginx
|
||||
ports:
|
||||
- 1080:80
|
||||
volumes:
|
||||
- ./nginx_conf/nginx:/etc/nginx
|
||||
- ./dist:/usr/share/nginx/html:ro
|
||||
|
||||
#include /etc/nginx/conf.d/*.conf;
|
||||
server {
|
||||
listen 80;
|
||||
#listen [::]:80;
|
||||
server_name localhost;
|
||||
|
||||
location / {
|
||||
root /usr/share/nginx/html;
|
||||
index index.html index.htm;
|
||||
}
|
||||
|
||||
location /m {
|
||||
rewrite .* /index.html permanent;
|
||||
}
|
||||
|
||||
#error_page 404 /404.html;
|
||||
# redirect server error pages to the static page /50x.html
|
||||
#
|
||||
error_page 500 502 503 504 /50x.html;
|
||||
location = /50x.html {
|
||||
root /usr/share/nginx/html;
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,43 +1,51 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta charset="UTF-8">
|
||||
<meta http-equiv="X-UA-Compatible" content="IE=edge">
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
<title>tilerendertest</title>
|
||||
<style>
|
||||
*{
|
||||
margin: 0;
|
||||
padding: 0;
|
||||
}
|
||||
.main{
|
||||
display: flex;
|
||||
justify-content: center;
|
||||
align-items: center;
|
||||
background-color: white;
|
||||
width: 100vw;
|
||||
height: 100vh;
|
||||
}
|
||||
.container{
|
||||
flex:1;
|
||||
display: flex;
|
||||
justify-content: center;
|
||||
align-items: center;
|
||||
}
|
||||
.map{
|
||||
/* background-color: #ddd; */
|
||||
background-color: #4c2626;
|
||||
width: 1600px;
|
||||
height: 900px;
|
||||
}
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<div class="main">
|
||||
<div class="container">
|
||||
<canvas class="map" id="map"></canvas>
|
||||
</div>
|
||||
|
||||
<head>
|
||||
<meta charset="UTF-8">
|
||||
<meta http-equiv="X-UA-Compatible" content="IE=edge">
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
<title>tilerendertest</title>
|
||||
<style>
|
||||
* {
|
||||
margin: 0;
|
||||
padding: 0;
|
||||
}
|
||||
|
||||
.main {
|
||||
display: flex;
|
||||
justify-content: center;
|
||||
align-items: center;
|
||||
background-color: #ebebeb;
|
||||
width: 100vw;
|
||||
height: 100vh;
|
||||
}
|
||||
|
||||
.container {
|
||||
flex: 1;
|
||||
display: flex;
|
||||
justify-content: center;
|
||||
align-items: center;
|
||||
}
|
||||
|
||||
.map {
|
||||
/* background-color: #ddd; */
|
||||
background-color: #cdcdcd;
|
||||
width: 100vw;
|
||||
height: 100vh;
|
||||
/* width: 512px;
|
||||
height: 512px; */
|
||||
}
|
||||
</style>
|
||||
</head>
|
||||
|
||||
<body>
|
||||
<div class="main">
|
||||
<div class="container">
|
||||
<canvas class="map" id="map"></canvas>
|
||||
</div>
|
||||
<script src="../ellipsode.js"></script>
|
||||
</body>
|
||||
</div>
|
||||
<script src="./index.js" type="module"></script>
|
||||
</body>
|
||||
|
||||
</html>
|
||||
@ -0,0 +1,10 @@
|
||||
import * as Basemap from './src/basemap.js'
|
||||
document.addEventListener('contextmenu', function (event) {
|
||||
event.preventDefault() // 阻止浏览器默认右键菜单的显示
|
||||
})
|
||||
|
||||
Basemap.setDomById('map')
|
||||
Basemap.setCanvasSize()
|
||||
window.addEventListener('resize', Basemap.setCanvasSize)
|
||||
|
||||
// Basemap.setCenterByWgs84(22.54, 114.06, 18)
|
||||
@ -1,333 +0,0 @@
|
||||
let map = document.getElementById('map');
|
||||
let coord = document.getElementById('coord');
|
||||
map.width = map.clientWidth;
|
||||
map.height = map.clientHeight;
|
||||
let ctx = map.getContext('2d');
|
||||
|
||||
const tilesize = 256;
|
||||
const minlevel = 3;
|
||||
const maxlevel = 18;
|
||||
let zoom_level = 3; //默认
|
||||
|
||||
let viewport = {};
|
||||
viewport.width = map.width; //默认已知
|
||||
viewport.height = map.height; //默认已知
|
||||
viewport.centerx = Math.pow(2, zoom_level) * 256 / 2; //默认
|
||||
viewport.centery = Math.pow(2, zoom_level) * 256 / 2; //默认
|
||||
|
||||
viewport.xoffset = (viewport.width / 2 - viewport.centerx);
|
||||
viewport.yoffset = (viewport.height / 2 - viewport.centery);
|
||||
|
||||
let needtiles = new Array();
|
||||
let cache = new Array();
|
||||
|
||||
let alltilecount = 0;
|
||||
let downtilecount = 0;
|
||||
let drecord = new Array();
|
||||
|
||||
function calTileSize() {
|
||||
let etsize = tilesize;
|
||||
if (zoom_level != Math.floor(zoom_level)) {
|
||||
etsize = tilesize * Math.pow(2, zoom_level - Math.floor(zoom_level + 1));
|
||||
}
|
||||
return etsize;
|
||||
}
|
||||
|
||||
function calTileNum(coord) {
|
||||
return Math.floor(coord / calTileSize());
|
||||
}
|
||||
|
||||
function tilesfilter(tails) {
|
||||
let news = new Array();
|
||||
let max = Math.pow(2, zoom_level);
|
||||
if (zoom_level != Math.floor(zoom_level)) {
|
||||
max = Math.pow(2, Math.floor(zoom_level + 1));
|
||||
}
|
||||
for (let i = 0; i < tails.length; i++) {
|
||||
const e = tails[i];
|
||||
if (e.x >= 0 && e.y >= 0 && e.x < max && e.y < max) {
|
||||
news.push(e);
|
||||
}
|
||||
}
|
||||
return news;
|
||||
}
|
||||
|
||||
|
||||
function clearcanvas() {
|
||||
ctx.clearRect(0, 0, map.width, map.height);
|
||||
}
|
||||
|
||||
function drawRect(x, y, width, height) {
|
||||
ctx.strokeStyle = "white"
|
||||
ctx.strokeRect(x, y, width, height);
|
||||
}
|
||||
|
||||
function drawtext(text, x, y) {
|
||||
ctx.fillStyle = "white"
|
||||
ctx.font = "18px serif";
|
||||
ctx.textAlign = "center";
|
||||
ctx.textBaseline = "middle";
|
||||
ctx.fillText(text, x, y);
|
||||
}
|
||||
|
||||
function mplat2viewport(mx, my) {
|
||||
const vx = mx + viewport.xoffset;
|
||||
const vy = my + viewport.yoffset;
|
||||
return { x: vx, y: vy };
|
||||
}
|
||||
|
||||
function viewport2mplat(vx, vy) {
|
||||
const mx = vx - viewport.xoffset;
|
||||
const my = vy - viewport.yoffset;
|
||||
return { x: mx, y: my };
|
||||
}
|
||||
|
||||
function viewport2wgs84(vx, vy) {
|
||||
const mlc = viewport2mplat(vx, vy);
|
||||
//数据超界处理, 这里对应缩放等级的地图的大小是
|
||||
const limit = calTileSize() * Math.pow(2, zoom_level);
|
||||
console.log(calTileSize());
|
||||
if (vx <= 0 || vy <= 0 || vx >= limit || vy >= limit) {
|
||||
throw "OutMapRange";
|
||||
}
|
||||
const lat = tile2lat(mlc.y / tilesize, zoom_level);
|
||||
const lng = tile2long(mlc.x / tilesize, zoom_level);
|
||||
return { lat: lat, lng: lng }
|
||||
}
|
||||
|
||||
function wgs84toviewport(lat, lng) {
|
||||
//数据超界处理 经度 -180 180
|
||||
//85.0511287798066 (2*Math.atan(Math.pow(Math.E,Math.PI))-Math.PI/2)/Math.PI*180
|
||||
const latlimit = 85.051128;
|
||||
const lngp = lng - Math.floor((lng + 180) / 360) * 360;
|
||||
if (lat < (0 - latlimit) || lat > latlimit) {
|
||||
throw "OutMapRange";
|
||||
}
|
||||
const my = lat2y(lat, zoom_level) * tilesize;
|
||||
const mx = lon2x(lngp, zoom_level) * tilesize;
|
||||
const vp = mplat2viewport(mx, my);
|
||||
return { x: vp.x, y: vp.y };
|
||||
}
|
||||
|
||||
|
||||
function updateviewporttest(scrollx, scrolly, oldz, newz) {
|
||||
//计算出缩放后坐标系的偏移值
|
||||
// xv = xm + offset ; offset = xv - xm
|
||||
//const newz = zoom_level;
|
||||
const scrollm = viewport2mplat(scrollx, scrolly);
|
||||
//const basescale = 2 * Math.pow(2, newz) / Math.pow(2, Math.floor(newz) + 1);
|
||||
console.log('zoomlevel : ', newz, oldz);
|
||||
const basescale = Math.pow(2, newz - oldz);
|
||||
console.log('basescale: ', basescale);
|
||||
const newscrollm = { x: scrollm.x * basescale, y: scrollm.y * basescale };
|
||||
console.log('缩放点新坐标 ', newscrollm);
|
||||
viewport.xoffset = scrollx - newscrollm.x;
|
||||
viewport.yoffset = scrolly - newscrollm.y;
|
||||
}
|
||||
|
||||
//test
|
||||
function drawtest() {
|
||||
ctx.clearRect(0, 0, map.width, map.height);
|
||||
const viewport_left_top = viewport2mplat(0, 0);
|
||||
const viewport_right_bottom = viewport2mplat(viewport.width, viewport.height);
|
||||
const mixnum = calTileNum(viewport_left_top.x);
|
||||
const miynum = calTileNum(viewport_left_top.y);
|
||||
const maxnum = calTileNum(viewport_right_bottom.x);
|
||||
const maynum = calTileNum(viewport_right_bottom.y);
|
||||
const horicount = maxnum - mixnum + 1;
|
||||
const verticount = maynum - miynum + 1;
|
||||
|
||||
clearcanvas();
|
||||
let tails = new Array();
|
||||
for (let i = 0; i < horicount; i++) {
|
||||
for (let j = 0; j < verticount; j++) {
|
||||
const x = mixnum + i;
|
||||
const y = miynum + j;
|
||||
tails.push({ x: x, y: y });
|
||||
}
|
||||
}
|
||||
needtiles = tilesfilter(tails);
|
||||
alltilecount += needtiles.length;
|
||||
//console.log(needtiles.length, needtiles);
|
||||
needtiles.forEach(et => {
|
||||
const etsize = calTileSize();
|
||||
//const tilev = mplat2viewport(et.x * etsize, et.y * etsize);
|
||||
//drawRect(tilev.x, tilev.y, etsize, etsize);
|
||||
let z = zoom_level;
|
||||
if (zoom_level != Math.floor(zoom_level)) {
|
||||
z = Math.floor(zoom_level + 1);
|
||||
}
|
||||
const text = `${z}/${et.x}/${et.y}.png`;
|
||||
console.log(text);
|
||||
//drawtext(text, tilev.x + etsize / 2, tilev.y + etsize / 2);
|
||||
drawTileImg(z, et.x, et.y);
|
||||
});
|
||||
debug();
|
||||
}
|
||||
|
||||
let moveflag = false;
|
||||
let downpoing = { x: 0, y: 0 };
|
||||
map.onmousedown = (e) => {
|
||||
console.log('鼠标按下');
|
||||
moveflag = true;
|
||||
downpoing.x = e.offsetX;
|
||||
downpoing.y = e.offsetY;
|
||||
console.log(zoom_level, e.offsetX, e.offsetY);
|
||||
const wgs84 = viewport2wgs84(e.offsetX, e.offsetY);
|
||||
console.log(wgs84, 'check', wgs84toviewport(wgs84.lat, wgs84.lng));
|
||||
}
|
||||
map.onmouseup = (e) => {
|
||||
console.log('鼠标松开');
|
||||
moveflag = false;
|
||||
}
|
||||
map.onmousemove = (e) => {
|
||||
//输出latlng
|
||||
//const mlc = viewport2mplat(e.offsetX, e.offsetY);
|
||||
//let lat = tile2lat(mlc.y / tilesize, zoom_level);
|
||||
//let lng = tile2long(mlc.x / tilesize, zoom_level);
|
||||
//const coordstr = `(${e.offsetX},${e.offsetY}) - (${mlc.x.toFixed(3)},${mlc.y.toFixed(3)}) - (${lat},${lng})`;
|
||||
//coord.innerText = coordstr;
|
||||
//console.log(e.offsetX, e.offsetY);
|
||||
if (moveflag) {
|
||||
console.log('有效位移');
|
||||
const movex = downpoing.x - e.offsetX;
|
||||
const movey = downpoing.y - e.offsetY;
|
||||
//实现移动逻辑
|
||||
viewport.xoffset -= movex;
|
||||
viewport.yoffset -= movey;
|
||||
|
||||
drawtest();
|
||||
downpoing.x = e.offsetX;
|
||||
downpoing.y = e.offsetY;
|
||||
}
|
||||
}
|
||||
|
||||
map.onwheel = (e) => {
|
||||
//console.log(e);
|
||||
const ds = 0.25;
|
||||
const zoomleveloffset = (e.deltaY > 0) ? 1 * ds : -1 * ds;
|
||||
const oldz = zoom_level;
|
||||
zoom_level = zoom_level - zoomleveloffset;
|
||||
if (zoom_level < minlevel) {
|
||||
zoom_level = minlevel;
|
||||
return;
|
||||
}
|
||||
|
||||
if (zoom_level > maxlevel) {
|
||||
zoom_level = maxlevel;
|
||||
return;
|
||||
}
|
||||
console.log(zoom_level, e.offsetX, e.offsetY);
|
||||
updateviewporttest(e.offsetX, e.offsetY, oldz, zoom_level);
|
||||
drawtest();
|
||||
}
|
||||
|
||||
drawtest();
|
||||
|
||||
|
||||
|
||||
Array.prototype.remove = function (val) {
|
||||
const index = this.indexOf(val);
|
||||
if (index > -1) {
|
||||
return this.splice(index, 1);
|
||||
}
|
||||
return this;
|
||||
}
|
||||
|
||||
//add opeenstreetmap
|
||||
function downloadimg(z, x, y) {
|
||||
return new Promise((resolve, reject) => {
|
||||
//const url = `https://tile.openstreetmap.org/${z}/${x}/${y}.png`;
|
||||
const url = 'http://webrd01.is.autonavi.com/' +
|
||||
'appmaptile?lang=zh_cn&size=1&scale=1&style=8' +
|
||||
`&x=${x}&y=${y}&z=${z}`;
|
||||
//add downloadcheck
|
||||
const obj = { z: z, x: x, y: y };
|
||||
drecord.push(obj); //下载前加入记录
|
||||
let img = new Image();
|
||||
img.onload = () => {
|
||||
console.log('downloaded' + z + '/' + x + '/' + y + '.png');
|
||||
cache.push({ img: img, z: z, x: x, y: y });
|
||||
drecord.remove(obj); //下载完成后从记录中移除
|
||||
downtilecount += 1;
|
||||
resolve(img);
|
||||
}
|
||||
img.src = url;
|
||||
});
|
||||
}
|
||||
|
||||
async function getImg(z, x, y) {
|
||||
//先判断是否加入下载记录
|
||||
const isdownloading = drecord.includes({ z: z, x: x, y: y });
|
||||
if (isdownloading) {
|
||||
//return getImg(z, x, y);
|
||||
return setTimeout(() => {
|
||||
getImg(z, x, y);
|
||||
}, 100);
|
||||
}
|
||||
const found = cache.find(e => (e.z == z && e.x == x && e.y == y));
|
||||
if (found == undefined) {
|
||||
let p = await downloadimg(z, x, y);
|
||||
return p;
|
||||
} else {
|
||||
console.log('exist' + z + '/' + x + '/' + y + '.png');
|
||||
return found.img;
|
||||
}
|
||||
}
|
||||
|
||||
function drawTileImg(z, x, y) {
|
||||
const img = getImg(z, x, y);
|
||||
img.then((e) => {
|
||||
const etsize = calTileSize();
|
||||
const tilev = mplat2viewport(x * etsize, y * etsize);
|
||||
let fz = zoom_level;
|
||||
if (zoom_level != Math.floor(zoom_level)) {
|
||||
fz = Math.floor(zoom_level + 1);
|
||||
}
|
||||
if (needtiles.find(t => z == fz && t.x == x && t.y == y)) {
|
||||
ctx.drawImage(e, tilev.x, tilev.y, etsize, etsize);
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
function debug() {
|
||||
console.log('=============debug=================');
|
||||
console.log('zoom_level', zoom_level);
|
||||
console.log('alltilecount', alltilecount);
|
||||
console.log('downtilecount', downtilecount);
|
||||
console.log('cachecount', caches.length);
|
||||
console.log('drecord count', drecord.length);
|
||||
console.log('=============debug=================');
|
||||
}
|
||||
|
||||
//=====coord about=====
|
||||
function lon2tile(lon, z) {
|
||||
return (Math.floor((lon + 180) / 360 * Math.pow(2, z)));
|
||||
}
|
||||
|
||||
function lat2tile(lat, z) {
|
||||
return (Math.floor((1 - Math.log(Math.tan(lat * Math.PI / 180) +
|
||||
1 / Math.cos(lat * Math.PI / 180)) / Math.PI) /
|
||||
2 * Math.pow(2, z)));
|
||||
}
|
||||
|
||||
function lon2x(lon, z) {
|
||||
return ((lon + 180) / 360 * Math.pow(2, z));
|
||||
}
|
||||
|
||||
function lat2y(lat, z) {
|
||||
return ((1 - Math.log(Math.tan(lat * Math.PI / 180) +
|
||||
1 / Math.cos(lat * Math.PI / 180)) / Math.PI) /
|
||||
2 * Math.pow(2, z));
|
||||
}
|
||||
|
||||
function tile2long(x, z) {
|
||||
return (x / Math.pow(2, z) * 360 - 180);
|
||||
}
|
||||
|
||||
function tile2lat(y, z) {
|
||||
var n = Math.PI - 2 * Math.PI * y / Math.pow(2, z);
|
||||
return (180 / Math.PI * Math.atan(0.5 * (Math.exp(n) - Math.exp(-n))));
|
||||
}
|
||||
|
||||
//=========
|
||||
@ -0,0 +1,17 @@
|
||||
{
|
||||
"name": "formaptile",
|
||||
"version": "1.0.0",
|
||||
"description": "",
|
||||
"main": "index.js",
|
||||
"type": "module",
|
||||
"scripts": {
|
||||
"test": "echo \"Error: no test specified\" && exit 1"
|
||||
},
|
||||
"repository": {
|
||||
"type": "git",
|
||||
"url": "http://atsw.top:3000/alimu/formaptile.git"
|
||||
},
|
||||
"keywords": [],
|
||||
"author": "",
|
||||
"license": "ISC"
|
||||
}
|
||||
@ -0,0 +1,220 @@
|
||||
import {
|
||||
viewport,
|
||||
calTileNum,
|
||||
calTileSize,
|
||||
setViewportSize,
|
||||
setViewportCenterByWgs84,
|
||||
setViewportCenterByMap,
|
||||
map2viewport,
|
||||
viewport2map,
|
||||
updateZoomLevel,
|
||||
} from './viewport.js'
|
||||
|
||||
import * as Tiles from './tiles.js'
|
||||
|
||||
let map = undefined
|
||||
|
||||
export function setDomById(id) {
|
||||
map = document.getElementById(id)
|
||||
console.debug('底图挂载在', map)
|
||||
//添加响应事件
|
||||
// let moveflag = false
|
||||
// let downpoing = { x: 0, y: 0 }
|
||||
const minlevel = 3
|
||||
const maxlevel = 18
|
||||
map.onwheel = (e) => {
|
||||
const ds = 0.25
|
||||
const zoomleveloffset = e.deltaY > 0 ? 1 * ds : -1 * ds
|
||||
let newz = viewport.zoom_level
|
||||
newz = newz - zoomleveloffset
|
||||
if (newz < minlevel) {
|
||||
newz = minlevel
|
||||
return
|
||||
}
|
||||
|
||||
if (newz > maxlevel) {
|
||||
newz = maxlevel
|
||||
return
|
||||
}
|
||||
updateZoomLevel(e.offsetX, e.offsetY, newz)
|
||||
savePosInfo()
|
||||
drawGrid()
|
||||
}
|
||||
|
||||
let moveflag = false
|
||||
let downpoing = { x: 0, y: 0 }
|
||||
map.onmousedown = (e) => {
|
||||
//console.log('鼠标按下')
|
||||
moveflag = true
|
||||
downpoing.x = e.offsetX
|
||||
downpoing.y = e.offsetY
|
||||
//console.log(viewport.zoom_level, e.offsetX, e.offsetY)
|
||||
// try {
|
||||
// const wgs84 = viewport2wgs84(e.offsetX, e.offsetY)
|
||||
// console.log(
|
||||
// 'check',
|
||||
// { x: e.offsetX, y: e.offsetY },
|
||||
// wgs84,
|
||||
// wgs84toviewport(wgs84.lat, wgs84.lon)
|
||||
// )
|
||||
// } catch (error) {
|
||||
// //console.log(error)
|
||||
// }
|
||||
}
|
||||
map.onmouseup = (e) => {
|
||||
//console.log('鼠标松开')
|
||||
moveflag = false
|
||||
}
|
||||
map.onmousemove = (e) => {
|
||||
//输出latlng
|
||||
//const mlc = viewport2map(e.offsetX, e.offsetY)
|
||||
// const wgs84 = viewport2wgs84(e.offsetX, e.offsetY)
|
||||
// const coordstr = `(${e.offsetX},${e.offsetY})->(${mlc.x.toFixed(
|
||||
// 3
|
||||
// )},${mlc.y.toFixed(3)})->(${wgs84.lat},${wgs84.lon})`
|
||||
// console.log(coordstr)
|
||||
if (moveflag) {
|
||||
//console.log('有效位移')
|
||||
const movex = downpoing.x - e.offsetX
|
||||
const movey = downpoing.y - e.offsetY
|
||||
//实现移动逻辑
|
||||
viewport.xoffset -= movex
|
||||
viewport.yoffset -= movey
|
||||
savePosInfo()
|
||||
drawGrid()
|
||||
downpoing.x = e.offsetX
|
||||
downpoing.y = e.offsetY
|
||||
}
|
||||
}
|
||||
}
|
||||
export function getContext() {
|
||||
if (map) {
|
||||
return map.getContext('2d')
|
||||
}
|
||||
}
|
||||
|
||||
function savePosInfo() {
|
||||
const mcenter = viewport2map(viewport.width / 2, viewport.height / 2)
|
||||
let poseInfo = {
|
||||
mx: mcenter.x,
|
||||
my: mcenter.y,
|
||||
zoom_level: viewport.zoom_level,
|
||||
}
|
||||
localStorage.setItem('poseInfo-nas22udfh12', JSON.stringify(poseInfo))
|
||||
}
|
||||
|
||||
export function setCanvasSize() {
|
||||
if (map) {
|
||||
map.width = map.clientWidth
|
||||
map.height = map.clientHeight
|
||||
//console.debug('重新设置大小', map.width, map.height)
|
||||
//init
|
||||
setViewportSize(map.width, map.height)
|
||||
//随机用一个标识
|
||||
const poseInfoStr = localStorage.getItem('poseInfo-nas22udfh12')
|
||||
const poseInfo = JSON.parse(poseInfoStr)
|
||||
if (poseInfo) {
|
||||
setViewportCenterByMap(
|
||||
poseInfo.mx,
|
||||
poseInfo.my,
|
||||
poseInfo.zoom_level
|
||||
)
|
||||
} else {
|
||||
setViewportCenterByWgs84(0, 0, 3)
|
||||
}
|
||||
//draw
|
||||
drawGrid()
|
||||
}
|
||||
}
|
||||
|
||||
export function setCenterByWgs84(lat, lon, z) {
|
||||
setViewportCenterByWgs84(lat, lon, z)
|
||||
drawGrid()
|
||||
}
|
||||
|
||||
function drawRect(x, y, width, height) {
|
||||
const ctx = getContext()
|
||||
ctx.strokeStyle = 'white'
|
||||
ctx.strokeRect(x, y, width, height)
|
||||
}
|
||||
|
||||
function clear() {
|
||||
const ctx = getContext()
|
||||
ctx.clearRect(0, 0, map.width, map.height)
|
||||
}
|
||||
|
||||
function drawtext(text, x, y) {
|
||||
const ctx = getContext()
|
||||
ctx.fillStyle = 'white'
|
||||
ctx.font = '18px serif'
|
||||
ctx.textAlign = 'center'
|
||||
ctx.textBaseline = 'middle'
|
||||
ctx.fillText(text, x, y)
|
||||
}
|
||||
|
||||
function drawTileImg(z, x, y) {
|
||||
const img = Tiles.getImg(z, x, y)
|
||||
img.then((e) => {
|
||||
const etsize = calTileSize()
|
||||
const tilev = map2viewport(x * etsize, y * etsize)
|
||||
let fz = viewport.zoom_level
|
||||
if (fz != Math.floor(fz)) {
|
||||
fz = Math.floor(fz + 1)
|
||||
}
|
||||
if (needtiles.find((t) => z == fz && t.x == x && t.y == y)) {
|
||||
const ctx = getContext()
|
||||
ctx.drawImage(e, tilev.x, tilev.y, etsize, etsize)
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
function tilesfilter(tails) {
|
||||
const zoom_level = viewport.zoom_level
|
||||
let news = new Array()
|
||||
let max = Math.pow(2, zoom_level)
|
||||
if (zoom_level != Math.floor(zoom_level)) {
|
||||
max = Math.pow(2, Math.floor(zoom_level + 1))
|
||||
}
|
||||
for (let i = 0; i < tails.length; i++) {
|
||||
const e = tails[i]
|
||||
if (e.x >= 0 && e.y >= 0 && e.x < max && e.y < max) {
|
||||
news.push(e)
|
||||
}
|
||||
}
|
||||
return news
|
||||
}
|
||||
|
||||
let needtiles = new Array()
|
||||
export function drawGrid() {
|
||||
clear()
|
||||
const viewport_left_top = viewport2map(0, 0)
|
||||
const viewport_right_bottom = viewport2map(viewport.width, viewport.height)
|
||||
const mixnum = calTileNum(viewport_left_top.x)
|
||||
const miynum = calTileNum(viewport_left_top.y)
|
||||
const maxnum = calTileNum(viewport_right_bottom.x)
|
||||
const maynum = calTileNum(viewport_right_bottom.y)
|
||||
const horicount = maxnum - mixnum + 1
|
||||
const verticount = maynum - miynum + 1
|
||||
let tails = new Array()
|
||||
for (let i = 0; i < horicount; i++) {
|
||||
for (let j = 0; j < verticount; j++) {
|
||||
const x = mixnum + i
|
||||
const y = miynum + j
|
||||
tails.push({ x: x, y: y })
|
||||
}
|
||||
}
|
||||
needtiles = tilesfilter(tails)
|
||||
needtiles.forEach((et) => {
|
||||
let z = viewport.zoom_level
|
||||
if (z != Math.floor(z)) {
|
||||
z = Math.floor(z + 1)
|
||||
}
|
||||
// const etsize = calTileSize()
|
||||
// const tilev = map2viewport(et.x * etsize, et.y * etsize)
|
||||
//drawRect(tilev.x, tilev.y, etsize, etsize)
|
||||
//const text = `${z}/${et.x}/${et.y}.png`
|
||||
//console.log(text)
|
||||
//drawtext(text, tilev.x + etsize / 2, tilev.y + etsize / 2)
|
||||
drawTileImg(z, et.x, et.y)
|
||||
})
|
||||
}
|
||||
@ -0,0 +1,52 @@
|
||||
Array.prototype.remove = function (val) {
|
||||
const index = this.indexOf(val)
|
||||
if (index > -1) {
|
||||
return this.splice(index, 1)
|
||||
}
|
||||
return this
|
||||
}
|
||||
|
||||
const cache = new Array()
|
||||
const downloadingRecord = new Array()
|
||||
|
||||
//const tileserverUrl =
|
||||
//openstreetmap
|
||||
//const url = `https://tile.openstreetmap.org/${z}/${x}/${y}.png`;
|
||||
|
||||
function downloadimg(z, x, y) {
|
||||
return new Promise((resolve, reject) => {
|
||||
const url =
|
||||
'https://webrd01.is.autonavi.com/' +
|
||||
'appmaptile?lang=zh_cn&size=1&scale=1&style=8' +
|
||||
`&x=${x}&y=${y}&z=${z}`
|
||||
//add downloadcheck
|
||||
const obj = { z: z, x: x, y: y }
|
||||
downloadingRecord.push(obj) //下载前加入记录
|
||||
let img = new Image()
|
||||
img.onload = () => {
|
||||
cache.push({ img: img, z: z, x: x, y: y })
|
||||
downloadingRecord.remove(obj) //下载完成后从记录中移除
|
||||
resolve(img)
|
||||
}
|
||||
img.referrerPolicy = 'no-referrer'
|
||||
img.src = url
|
||||
})
|
||||
}
|
||||
|
||||
export async function getImg(z, x, y) {
|
||||
//先判断是否加入下载记录
|
||||
const isdownloading = downloadingRecord.includes({ z: z, x: x, y: y })
|
||||
if (isdownloading) {
|
||||
//return getImg(z, x, y);
|
||||
return setTimeout(() => {
|
||||
getImg(z, x, y)
|
||||
}, 100)
|
||||
}
|
||||
const found = cache.find((e) => e.z == z && e.x == x && e.y == y)
|
||||
if (found == undefined) {
|
||||
let p = await downloadimg(z, x, y)
|
||||
return p
|
||||
} else {
|
||||
return found.img
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,45 @@
|
||||
//=====coord about=====
|
||||
export function lon2tile(lon, z) {
|
||||
return Math.floor(((lon + 180) / 360) * Math.pow(2, z))
|
||||
}
|
||||
|
||||
export function lat2tile(lat, z) {
|
||||
return Math.floor(
|
||||
((1 -
|
||||
Math.log(
|
||||
Math.tan((lat * Math.PI) / 180) +
|
||||
1 / Math.cos((lat * Math.PI) / 180)
|
||||
) /
|
||||
Math.PI) /
|
||||
2) *
|
||||
Math.pow(2, z)
|
||||
)
|
||||
}
|
||||
|
||||
export function lon2x(lon, z) {
|
||||
return ((lon + 180) / 360) * Math.pow(2, z)
|
||||
}
|
||||
|
||||
export function lat2y(lat, z) {
|
||||
return (
|
||||
((1 -
|
||||
Math.log(
|
||||
Math.tan((lat * Math.PI) / 180) +
|
||||
1 / Math.cos((lat * Math.PI) / 180)
|
||||
) /
|
||||
Math.PI) /
|
||||
2) *
|
||||
Math.pow(2, z)
|
||||
)
|
||||
}
|
||||
|
||||
export function tile2long(x, z) {
|
||||
return (x / Math.pow(2, z)) * 360 - 180
|
||||
}
|
||||
|
||||
export function tile2lat(y, z) {
|
||||
var n = Math.PI - (2 * Math.PI * y) / Math.pow(2, z)
|
||||
return (180 / Math.PI) * Math.atan(0.5 * (Math.exp(n) - Math.exp(-n)))
|
||||
}
|
||||
|
||||
//=========
|
||||
@ -1,251 +0,0 @@
|
||||
let map = document.getElementById('map');
|
||||
map.width = map.clientWidth;
|
||||
map.height = map.clientHeight;
|
||||
let ctx = map.getContext('2d');
|
||||
|
||||
const tilesize = 256;
|
||||
const minlevel = 0;
|
||||
const maxlevel = 19;
|
||||
let zoom_level = 0; //默认
|
||||
|
||||
let viewport = {};
|
||||
viewport.width = map.width; //默认已知
|
||||
viewport.height = map.height; //默认已知
|
||||
viewport.centerx = Math.pow(2, zoom_level) * 256 / 2; //默认
|
||||
viewport.centery = Math.pow(2, zoom_level) * 256 / 2; //默认
|
||||
|
||||
viewport.xoffset = (viewport.width / 2 - viewport.centerx);
|
||||
viewport.yoffset = (viewport.height / 2 - viewport.centery);
|
||||
|
||||
let needtiles = new Array();
|
||||
let cache = new Array();
|
||||
let xhrmanager = new Array();
|
||||
|
||||
function calTileSize() {
|
||||
let etsize = tilesize;
|
||||
if (zoom_level != Math.floor(zoom_level)) {
|
||||
etsize = tilesize * Math.pow(2, zoom_level - Math.floor(zoom_level + 1));
|
||||
}
|
||||
return etsize;
|
||||
}
|
||||
|
||||
function calTileNum(coord) {
|
||||
return Math.floor(coord / calTileSize());
|
||||
}
|
||||
|
||||
function tilesfilter(tails) {
|
||||
let news = new Array();
|
||||
let max = Math.pow(2, zoom_level);
|
||||
if (zoom_level != Math.floor(zoom_level)) {
|
||||
max = Math.pow(2, Math.floor(zoom_level + 1));
|
||||
}
|
||||
for (let i = 0; i < tails.length; i++) {
|
||||
const e = tails[i];
|
||||
if (e.x >= 0 && e.y >= 0 && e.x < max && e.y < max) {
|
||||
news.push(e);
|
||||
}
|
||||
}
|
||||
return news;
|
||||
}
|
||||
|
||||
|
||||
function clearcanvas() {
|
||||
ctx.clearRect(0, 0, map.width, map.height);
|
||||
}
|
||||
|
||||
function drawRect(x, y, width, height) {
|
||||
ctx.strokeStyle = "white"
|
||||
ctx.strokeRect(x, y, width, height);
|
||||
}
|
||||
|
||||
function drawtext(text, x, y) {
|
||||
ctx.fillStyle = "white"
|
||||
ctx.font = "18px serif";
|
||||
ctx.textAlign = "center";
|
||||
ctx.textBaseline = "middle";
|
||||
ctx.fillText(text, x, y);
|
||||
}
|
||||
|
||||
function mplat2viewport(mx, my) {
|
||||
const vx = mx + viewport.xoffset;
|
||||
const vy = my + viewport.yoffset;
|
||||
return { x: vx, y: vy };
|
||||
}
|
||||
|
||||
function viewport2mplat(vx, vy) {
|
||||
const mx = vx - viewport.xoffset;
|
||||
const my = vy - viewport.yoffset;
|
||||
return { x: mx, y: my };
|
||||
}
|
||||
|
||||
function updateviewporttest(scrollx, scrolly, oldz, newz) {
|
||||
//计算出缩放后坐标系的偏移值
|
||||
// xv = xm + offset ; offset = xv - xm
|
||||
//const newz = zoom_level;
|
||||
const scrollm = viewport2mplat(scrollx, scrolly);
|
||||
//const basescale = 2 * Math.pow(2, newz) / Math.pow(2, Math.floor(newz) + 1);
|
||||
console.log('zoomlevel : ', newz, oldz);
|
||||
const basescale = Math.pow(2, newz - oldz);
|
||||
console.log('basescale: ', basescale);
|
||||
const newscrollm = { x: scrollm.x * basescale, y: scrollm.y * basescale };
|
||||
console.log('缩放点新坐标 ', newscrollm);
|
||||
viewport.xoffset = scrollx - newscrollm.x;
|
||||
viewport.yoffset = scrolly - newscrollm.y;
|
||||
}
|
||||
|
||||
//test
|
||||
function drawtest() {
|
||||
ctx.clearRect(0, 0, map.width, map.height);
|
||||
const viewport_left_top = viewport2mplat(0, 0);
|
||||
const viewport_right_bottom = viewport2mplat(viewport.width, viewport.height);
|
||||
const mixnum = calTileNum(viewport_left_top.x);
|
||||
const miynum = calTileNum(viewport_left_top.y);
|
||||
const maxnum = calTileNum(viewport_right_bottom.x);
|
||||
const maynum = calTileNum(viewport_right_bottom.y);
|
||||
const horicount = maxnum - mixnum + 1;
|
||||
const verticount = maynum - miynum + 1;
|
||||
|
||||
clearcanvas();
|
||||
xhrabort();
|
||||
let tails = new Array();
|
||||
for (let i = 0; i < horicount; i++) {
|
||||
for (let j = 0; j < verticount; j++) {
|
||||
const x = mixnum + i;
|
||||
const y = miynum + j;
|
||||
tails.push({ x: x, y: y });
|
||||
}
|
||||
}
|
||||
needtiles = tilesfilter(tails);
|
||||
//console.log(needtiles.length, needtiles);
|
||||
needtiles.forEach(et => {
|
||||
const etsize = calTileSize();
|
||||
const tilev = mplat2viewport(et.x * etsize, et.y * etsize);
|
||||
//drawRect(tilev.x, tilev.y, etsize, etsize);
|
||||
let z = zoom_level;
|
||||
if (zoom_level != Math.floor(zoom_level)) {
|
||||
z = Math.floor(zoom_level + 1);
|
||||
}
|
||||
const text = `${z}/${et.x}/${et.y}.png`;
|
||||
console.log(text);
|
||||
drawtext(text, tilev.x + etsize / 2, tilev.y + etsize / 2);
|
||||
drawTileImg(z, et.x, et.y);
|
||||
});
|
||||
}
|
||||
|
||||
let moveflag = false;
|
||||
let downpoing = { x: 0, y: 0 };
|
||||
map.onmousedown = (e) => {
|
||||
console.log('鼠标按下');
|
||||
moveflag = true;
|
||||
downpoing.x = e.offsetX;
|
||||
downpoing.y = e.offsetY;
|
||||
//console.log(viewport2mplat(e.offsetX, e.offsetY));
|
||||
}
|
||||
map.onmouseup = (e) => {
|
||||
console.log('鼠标松开');
|
||||
moveflag = false;
|
||||
}
|
||||
map.onmousemove = (e) => {
|
||||
if (moveflag) {
|
||||
console.log('有效位移');
|
||||
const movex = downpoing.x - e.offsetX;
|
||||
const movey = downpoing.y - e.offsetY;
|
||||
//实现移动逻辑
|
||||
viewport.xoffset -= movex;
|
||||
viewport.yoffset -= movey;
|
||||
|
||||
drawtest();
|
||||
downpoing.x = e.offsetX;
|
||||
downpoing.y = e.offsetY;
|
||||
}
|
||||
}
|
||||
|
||||
map.onwheel = (e) => {
|
||||
//console.log(e);
|
||||
const ds = 0.25;
|
||||
const zoomleveloffset = (e.deltaY > 0) ? 1 * ds : -1 * ds;
|
||||
const oldz = zoom_level;
|
||||
zoom_level = zoom_level - zoomleveloffset;
|
||||
if (zoom_level < minlevel) {
|
||||
zoom_level = minlevel;
|
||||
return;
|
||||
}
|
||||
|
||||
if (zoom_level > maxlevel) {
|
||||
zoom_level = maxlevel;
|
||||
return;
|
||||
}
|
||||
console.log(zoom_level, e.offsetX, e.offsetY);
|
||||
updateviewporttest(e.offsetX, e.offsetY, oldz, zoom_level);
|
||||
drawtest();
|
||||
}
|
||||
|
||||
drawtest();
|
||||
|
||||
//add opeenstreetmap
|
||||
function downloadimg(z, x, y) {
|
||||
return new Promise((resolve, reject) => {
|
||||
const url = `https://tile.openstreetmap.org/${z}/${x}/${y}.png`;
|
||||
let img = new Image();
|
||||
img.onload = () => {
|
||||
console.log('downloaded' + z + '/' + x + '/' + y + '.png');
|
||||
cache.push({ img: img, z: z, x: x, y: y });
|
||||
resolve(img);
|
||||
}
|
||||
img.src = url;
|
||||
});
|
||||
}
|
||||
|
||||
//尝试优化图片下载机制
|
||||
function xhrdownloadimg(z, x, y) {
|
||||
return new Promise((resolve, reject) => {
|
||||
const url = `https://tile.openstreetmap.org/${z}/${x}/${y}.png`;
|
||||
let imgxhr = new XMLHttpRequest();
|
||||
imgxhr.open('GET', url, true);
|
||||
//imgxhr.withCredentials = true;
|
||||
imgxhr.responseType = 'blob';
|
||||
imgxhr.onload = function (e) {
|
||||
if (this.status === 200 && imgxhr.response) {
|
||||
let blob = new Blob([imgxhr.response], { type: 'image/png' });
|
||||
let img = createImageBitmap(blob);
|
||||
cache.push({ img: img, z: z, x: x, y: y });
|
||||
resolve(img);
|
||||
}
|
||||
};
|
||||
xhrmanager.push(imgxhr);
|
||||
imgxhr.send(null);
|
||||
});
|
||||
}
|
||||
|
||||
function xhrabort() {
|
||||
xhrmanager.forEach(element => {
|
||||
element.abort();
|
||||
});
|
||||
xhrmanager = new Array();
|
||||
}
|
||||
|
||||
async function getImg(z, x, y) {
|
||||
const found = cache.find(e => (e.z == z && e.x == x && e.y == y));
|
||||
if (found == undefined) {
|
||||
let p = await xhrdownloadimg(z, x, y);
|
||||
return p;
|
||||
} else {
|
||||
console.log('exist' + z + '/' + x + '/' + y + '.png');
|
||||
return found.img;
|
||||
}
|
||||
}
|
||||
|
||||
function drawTileImg(z, x, y) {
|
||||
const img = getImg(z, x, y);
|
||||
img.then((e) => {
|
||||
const etsize = calTileSize();
|
||||
const tilev = mplat2viewport(x * etsize, y * etsize);
|
||||
let fz = zoom_level;
|
||||
if (zoom_level != Math.floor(zoom_level)) {
|
||||
fz = Math.floor(zoom_level + 1);
|
||||
}
|
||||
if (needtiles.find(t => z == fz && t.x == x && t.y == y)) {
|
||||
ctx.drawImage(e, tilev.x, tilev.y, etsize, etsize);
|
||||
}
|
||||
});
|
||||
}
|
||||
Loading…
Reference in New Issue