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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
body {
padding: 0;
margin: 0;
}
#btn {
position: absolute;
z-index: 2;
top: 0px;
left: 0px;
}
#map {
position: absolute;
height: 100%;
width: 100%;
background-color: black;
}
</style>
</head>
<body>
<div id="nav"></div>
<button id="btn">截图</button>
<div id="map"></div>
<script type="module">
import * as THREE from './node_modules/three/build/three.module.js';
import ThreeBase from './ThreeBase.js';
import mapOption from './mapOption.js';
import {
getGadientArray,
getColor,
getRgbColor,
getTextSprite,
getBasicMaterial
} from './util.js';
import { getLineShaderMaterial, getGradientShaderMaterial } from './shaderUtil.js';
import { queryGeojson, getGeoInfo, latlng2px } from './geoUtil.js';
import { GeometryUtils } from './node_modules/three/examples/jsm/utils/GeometryUtils.js';
class RegionMap extends ThreeBase {
constructor() {
super();
this.latlngScale = 10;
this.objGroup = null;
this.isAxis = false;
this.isRaycaster = true;
this.isStats = false;
this.colorNum = 5;
this.bounding = {
minlat: Number.MAX_VALUE,
minlng: Number.MAX_VALUE,
maxlng: 0,
maxlat: 0
};
this.circleScale = 1;
this.lineTime = 0;
this.sizeScale = 1;
}
animateAction() {
let options = this.that;
//是否自动旋转
if (options?.viewControl?.autoRotate) {
if (this.containerGroup.rotation.y >= Math.PI * 2) {
this.containerGroup.rotation.y = 0;
} else {
this.containerGroup.rotation.y += (Math.PI * 2) / options.viewControl.rotateSpeed;
}
}
//散点波纹扩散
if (this.circleGroup?.children?.length > 0) {
this.circleGroup.children.forEach((elmt) => {
if (elmt.material.opacity <= 0) {
elmt.material.opacity = 1;
this.circleScale = 1;
} else {
//大小变大，透明度减小
elmt.material.opacity += -0.01;
this.circleScale += 0.0002;
}
elmt.scale.x = this.circleScale;
elmt.scale.y = this.circleScale;
});
}
//飞线颜色变化
if (this.linesGroup?.children?.length > 0) {
if (this.lineTime >= 1.0) {
this.lineTime = 0.0;
} else {
this.lineTime += 0.005;
}
this.linesMaterial.forEach((m) => {
m.uniforms.time.value = this.lineTime;
});
}
}
clean() {
this.actionElmts = [];
this.linesMaterial = [];
if (this.tooltip) {
this.cleanObj(this.tooltip);
}
this.activeObj = null;
if (this.objGroup) {
this.cleanObj(this.objGroup);
this.objGroup = null;
}
}
createBar(op, idx) {
const material = getGradientShaderMaterial(
THREE,
op.itemStyle.topColor,
op.itemStyle.bottomColor
);
let min = op.data[0].value,
max = op.data[0].value;
op.data.forEach((item) => {
if (item.value < min) {
min = item.value;
}
if (item.value > max) {
max = item.value;
}
});
let len = max - min;
for (let index = 0; index < op.data.length; index++) {
let item = op.data[index];
let pos = latlng2px([item.lng, item.lat]);
//柱体范围过滤
if (this.checkBounding(pos)) {
//柱体高度
let h =
(((item.value - min) / len) * op.itemStyle.maxHeight + op.itemStyle.minHeight) *
this.sizeScale;
let bar = new THREE.BoxGeometry(
op.itemStyle.barWidth * this.sizeScale,
h,
op.itemStyle.barWidth * this.sizeScale
);
let barMesh = new THREE.Mesh(bar, material);
barMesh.name = 'bar-' + idx + '-' + index;
barMesh.position.set(pos[0], 0.5 * h, pos[1]);
this.barGroup.add(barMesh);
}
}
}
getCircleMaterial(radius, color) {
const canvas = document.createElement('canvas');
canvas.height = radius * 3.1;
canvas.width = radius * 3.1;
const ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.strokeStyle = color;
// ctx.shadowBlur = radius * 0.1;
// ctx.shadowColor = color;
//画三个波纹圈
//外圈
ctx.lineWidth = radius * 0.2;
ctx.lineWidth = ctx.lineWidth < 1 ? 1 : ctx.lineWidth;
ctx.beginPath();
ctx.arc(canvas.width * 0.5, canvas.height * 0.5, radius, 0, 2 * Math.PI);
ctx.closePath();
ctx.stroke();
//中圈
ctx.lineWidth = radius * 0.1;
ctx.lineWidth = ctx.lineWidth < 1 ? 1 : ctx.lineWidth;
ctx.beginPath();
ctx.arc(canvas.width * 0.5, canvas.height * 0.5, radius * 1.3, 0, 2 * Math.PI);
ctx.closePath();
ctx.stroke();
//内圈
ctx.lineWidth = radius * 0.05;
ctx.lineWidth = ctx.lineWidth < 1 ? 1 : ctx.lineWidth;
ctx.beginPath();
ctx.arc(canvas.width * 0.5, canvas.height * 0.5, radius * 1.5, 0, 2 * Math.PI);
ctx.closePath();
ctx.stroke();
const map = new THREE.CanvasTexture(canvas);
map.wrapS = THREE.RepeatWrapping;
map.wrapT = THREE.RepeatWrapping;
let res = getColor(color);
const material = new THREE.MeshBasicMaterial({
map: map,
transparent: true,
color: new THREE.Color(`rgb(${res.red},${res.green},${res.blue})`),
opacity: 1,
// depthTest: false,
side: THREE.DoubleSide
});
return { material, canvas };
}
createScatter(op, idx) {
let min = op.data[0].value,
max = op.data[0].value;
op.data.forEach((item) => {
if (item.value < min) {
min = item.value;
}
if (item.value > max) {
max = item.value;
}
});
let len = max - min;
let unit = len / this.colorNum;
let size = op.itemStyle.maxRadius - op.itemStyle.minRadius || 1;
//热力颜色列表
let colorList = getGadientArray(
op.itemStyle.colorList[0],
op.itemStyle.colorList[1],
this.colorNum
);
for (let index = 0; index < op.data.length; index++) {
let item = op.data[index];
let pos = latlng2px([item.lng, item.lat]);
//检查散点是否在范围内
if (this.checkBounding(pos)) {
//获取热力颜色
let cIdx = Math.floor((item.value - min) / unit);
cIdx = cIdx >= this.colorNum ? this.colorNum - 1 : cIdx;
let color = colorList[cIdx];
let c = getColor(color);
const material = getBasicMaterial(
THREE,
`rgba(${c.red},${c.green},${c.blue},${op.itemStyle.opacity})`
);
//获取散点大小
let r;
if (len == 0) {
r = op.itemStyle.minRadius * this.sizeScale;
} else {
r = ((item.value - min) / len) * size + op.itemStyle.minRadius;
r = r * this.sizeScale;
}
//散点
let geometry = new THREE.CircleGeometry(r, 32);
let mesh = new THREE.Mesh(geometry, material);
mesh.name = 'scatter-' + idx + '-' + index;
mesh.rotateX(0.5 * Math.PI);
mesh.position.set(pos[0], 0, pos[1]);
this.scatterGroup.add(mesh);
//波纹圈
if (op.itemStyle.isCircle) {
const { material: circleMaterial } = this.getCircleMaterial(
op.itemStyle.maxRadius * 20,
color
);
let circle = new THREE.Mesh(new THREE.CircleGeometry(r * 2, 32), circleMaterial);
circle.name = 'circle' + idx + '-' + index;
circle.rotateX(0.5 * Math.PI);
circle.position.set(pos[0], 0, pos[1]);
this.circleGroup.add(circle);
}
}
}
this.scatterGroup.position.y = 0.1 * this.sizeScale;
if (op.itemStyle.isCircle) {
this.circleGroup.position.y = 0.1 * this.sizeScale;
}
}
createLines(op, idx) {
const material = getLineShaderMaterial(THREE, op.itemStyle.color, op.itemStyle.runColor);
this.linesMaterial.push(material);
for (let index = 0; index < op.data.length; index++) {
let item = op.data[index];
let pos = latlng2px([item.fromlng, item.fromlat]);
let pos2 = latlng2px([item.tolng, item.tolat]);
//过滤飞线范围
if (this.checkBounding(pos) && this.checkBounding(pos2)) {
let pos1 = latlng2px([
(item.fromlng + item.tolng) / 2,
(item.fromlat + item.tolat) / 2
]);
//贝塞尔曲线
const curve = new THREE.QuadraticBezierCurve3(
new THREE.Vector3(pos[0], 0, pos[1]),
new THREE.Vector3(pos1[0], op.itemStyle.lineHeight * this.sizeScale, pos1[1]),
new THREE.Vector3(pos2[0], 0, pos2[1])
);
const geometry = new THREE.TubeGeometry(
curve,
32,
op.itemStyle.lineWidth * this.sizeScale,
8,
false
);
const line = new THREE.Mesh(geometry, material);
line.name = 'lines-' + idx + '-' + index;
this.linesGroup.add(line);
}
}
}
mouseHoverAction() {
this.doMouseAction(false);
}
raycasterAction() {
console.log('click');
this.doMouseAction(true);
}
createToolTip(regionName, regionIdx, center, scale) {
let op = this.that;
if (!op.tooltip.show) {
return;
}
let text;
let data;
//文本格式化替换
if (regionIdx >= 0) {
data = op.data[regionIdx];
text = op.tooltip.formatter;
} else {
text = '{name}';
}
if (text.indexOf('{name}') >= 0) {
text = text.replace('{name}', regionName);
}
if (text.indexOf('{value}') >= 0) {
text = text.replace('{value}', data.value);
}
let { mesh, canvas } = getTextSprite(
THREE,
text,
op.tooltip.fontSize * this.sizeScale,
op.tooltip.color,
op.tooltip.bg
);
let s = this.latlngScale / this.sizeScale;
//注意canvas精灵的大小要保持比例
mesh.scale.set(canvas.width * 0.01 * s, canvas.height * 0.01 * s);
let box = new THREE.Box3().setFromObject(mesh);
this.tooltip = mesh;
this.tooltip.position.set(center.x, center.y + scale.y + box.getSize().y, center.z);
this.scene.add(mesh);
}
doMouseAction(isChange) {
const intersects = this.raycaster.intersectObjects(this.actionElmts, true);
let newActiveObj;
let options = this.that;
if (intersects.length > 0) {
newActiveObj = intersects[0].object;
}
if (
(this.activeObj && newActiveObj && this.activeObj.name != newActiveObj.name) ||
(!this.activeObj && newActiveObj)
) {
console.log('active', newActiveObj);
//删除旧的提示文本
if (this.tooltip) {
this.cleanObj(this.tooltip);
this.tooltip = null;
}
//还原旧的区块材质
if (this.regions && this.beforeMaterial) {
this.regions.forEach((elmt) => {
elmt.material = this.beforeMaterial;
});
}
//存储旧的区块材质
this.beforeMaterial = newActiveObj.material;
let regions = this.actionElmts.filter((item) => item.name == newActiveObj.name);
let regionIdx = newActiveObj.regionIdx;
let idx = newActiveObj.idx;
let regionName = newActiveObj.name;
//将区块材质设置成激活状态材质
if (regions?.length) {
let center = new THREE.Vector3();
regions.forEach((elmt) => {
elmt.material = this.activeRegionMat;
elmt.updateMatrixWorld();
let box = new THREE.Box3().setFromObject(elmt);
let c = box.getCenter(new THREE.Vector3());
center.x += c.x;
center.y += c.y;
center.z += c.z;
});
//计算中心点，创建提示文本
center.x = center.x / regions.length;
center.y = center.y / regions.length;
center.z = center.z / regions.length;
newActiveObj.updateMatrixWorld();
let objBox = new THREE.Box3().setFromObject(newActiveObj);
this.createToolTip(regionName, regionIdx, center, objBox.getSize());
}
this.regions = regions;
this.activeObj = newActiveObj;
}
//点击下钻
if (this.that.isDown && isChange && newActiveObj && this.activeObj) {
let f = this.geoJson.features[this.activeObj.idx];
this.that.adcode = f.properties.adcode;
this.that.address = f.properties.name;
console.log('next region', this.that.adcode);
this.createChart(this.that);
}
}
checkBounding(pos) {
if (
pos[0] >= this.bounding.minlng &&
pos[0] <= this.bounding.maxlng &&
pos[1] >= this.bounding.minlat &&
pos[1] <= this.bounding.maxlat
) {
return true;
}
return false;
}
createRegion({ c, extrudeSettings, lineM, regionName, regionColor, idx, regionIdx }) {
const shape = new THREE.Shape();
const points = [];
let pos0 = latlng2px(c[0]);
shape.moveTo(...pos0);
let h = 0;
points.push(new THREE.Vector3(...pos0, h));
for (let i = 1; i < c.length; i++) {
let p = latlng2px(c[i]);
shape.lineTo(...p);
points.push(new THREE.Vector3(...p, h));
}
shape.lineTo(...pos0);
//添加区块形状
const geometry = new THREE.ExtrudeGeometry(shape, extrudeSettings);
let material = getBasicMaterial(THREE, regionColor);
const mesh = new THREE.Mesh(geometry, material);
mesh.name = regionName;
mesh.regionIdx = regionIdx;
mesh.idx = idx;
mesh.rotateX(Math.PI * 0.5);
//收集动作元素
this.actionElmts.push(mesh);
//添加边框
const lineGeo = new THREE.BufferGeometry().setFromPoints(points);
const line = new THREE.Line(lineGeo, lineM);
line.name = 'regionline-' + idx;
line.rotateX(Math.PI * 0.5);
line.position.y = 0.03 * this.sizeScale;
let group = new THREE.Group();
group.name = 'region-' + idx;
group.add(mesh, line);
this.mapGroup.add(group);
}
loaderExturdeGeometry() {
let options = this.that;
let minValue;
let maxValue;
let valueLen;
if (options.data.length > 0) {
minValue = options.data[0].value;
maxValue = options.data[0].value;
options.data.forEach((item) => {
if (item.value < minValue) {
minValue = item.value;
}
if (item.value > maxValue) {
maxValue = item.value;
}
});
valueLen = (maxValue - minValue) / this.colorNum;
}
//生成热力颜色列表
this.activeRegionMat = getBasicMaterial(THREE, options.regionStyle.emphasisColor);
this.mapGroup = new THREE.Group();
let colorList = getGadientArray(
options.regionStyle.colorList[0],
options.regionStyle.colorList[1],
this.colorNum
);
const extrudeSettings = {
depth: options.regionStyle.depth * this.sizeScale,
bevelEnabled: false
};
//区块边框线颜色
const lineM = new THREE.LineBasicMaterial({
color: options.regionStyle.borderColor,
linewidth: options.regionStyle.borderWidth
});
for (let idx = 0; idx < this.geoJson.features.length; idx++) {
let a = this.geoJson.features[idx];
let regionColor = options.regionStyle.color;
let regionName = a.properties.name;
let regionIdx = options.data.findIndex((item) => item.name == regionName);
//计算区块热力值颜色
if (regionIdx >= 0) {
let regionData = options.data[regionIdx];
let cIdx = Math.floor((regionData.value - minValue) / valueLen);
cIdx = cIdx >= this.colorNum ? this.colorNum - 1 : cIdx;
regionColor = colorList[cIdx];
// console.log('%c' + regionName + regionData.value, 'background:' + regionColor);
}
let op = {
extrudeSettings,
lineM,
regionColor,
regionName,
regionIdx,
idx
};
if (a.geometry.type == 'MultiPolygon') {
a.geometry.coordinates.forEach((b) => {
b.forEach((c) => {
op.c = c;
this.createRegion(op);
});
});
} else {
a.geometry.coordinates.forEach((c) => {
op.c = c;
this.createRegion(op);
});
}
}
this.objGroup.add(this.mapGroup);
}
async createChart(that) {
this.that = that;
this.scene.background = new THREE.Color(0x000000);
let startTime = new Date().getTime();
//限制控制器角度
this.controls.maxPolarAngle = Math.PI * 0.5;
let options = this.that;
if (this.adcode != options.adcode || !this.geoJson) {
//获取geojson
let res = await queryGeojson(options.adcode, true);
let res1 = await queryGeojson(options.adcode, false);
this.geoJson = res;
this.adcode = options.adcode;
this.geoJson1 = res1;
//获取区块信息
let info = getGeoInfo(this.geoJson1);
this.geoInfo = info;
this.bounding = info.bounding;
this.sizeScale = info.scale;
}
this.clean();
this.objGroup = new THREE.Group();
this.loaderExturdeGeometry();
if (options.series && options.series.length > 0) {
this.barGroup = new THREE.Group();
this.scatterGroup = new THREE.Group();
this.linesGroup = new THREE.Group();
this.circleGroup = new THREE.Group();
for (let idx = 0; idx < options.series.length; idx++) {
let op = options.series[idx];
switch (op.type) {
case 'bar3D':
this.createBar(op, idx);
break;
case 'lines3D':
this.createLines(op, idx);
break;
case 'scatter3D':
this.createScatter(op, idx);
break;
}
}
this.objGroup.add(this.barGroup);
this.objGroup.add(this.scatterGroup);
this.objGroup.add(this.circleGroup);
this.objGroup.add(this.linesGroup);
}
this.containerGroup = new THREE.Group();
let s = this.latlngScale / this.sizeScale;
this.objGroup.scale.set(s, s, s);
this.containerGroup.add(this.objGroup);
this.scene.add(this.containerGroup);
this.setModelCenter(this.objGroup, options.viewControl);
console.log('渲染耗时', new Date().getTime() - startTime, this.scene);
}
}
var map = new RegionMap();
map.initThree(document.getElementById('map'));
map.createChart(mapOption);
document.getElementById('btn').onclick = () => {
map.saveImage();
};
window.map = map;
</script>
</body>
</html>