【超图+CESIUM】【基础API使用示例】33、超图｜CESIUM - 绘制特效线段（发光｜指定颜色｜带边框｜指定颜色箭头｜虚线｜动态线）
let viewer
window.onload = function () {
viewer = new Cesium.Viewer('cesium-container', {
sceneModePicker: true,
navigation: false,
})
initBindDrawEventHandler()
}
// 初始化绑定按钮的绘制事件
function initBindDrawEventHandler() {
const btns = document.querySelectorAll('.panel .btn')
btns[0].addEventListener('click', () => {
drawGlowingLineHandler()
activeCurrentClickBtnHandler(0)
})
btns[1].addEventListener('click', () => {
drawSpecifyColorLineHandler()
activeCurrentClickBtnHandler(1)
})
btns[2].addEventListener('click', () => {
drawSpecifyColorAndOutlineColorLineHandler()
activeCurrentClickBtnHandler(2)
})
btns[3].addEventListener('click', () => {
drawSpecifyColorArrowStaticStateLineHandler()
activeCurrentClickBtnHandler(3)
})
btns[4].addEventListener('click', () => {
drawDashedLineHandler()
activeCurrentClickBtnHandler(4)
})
btns[5].addEventListener('click', () => {
drawDynamicLineHandler()
activeCurrentClickBtnHandler(5)
})
btns[6].addEventListener('click', () => {
clearAllEntitiesHandler()
activeCurrentClickBtnHandler(6)
})
}
// 1、绘制发光的线
function drawGlowingLineHandler() {
viewer.entities.add({
name: 'Glowing blue line on the surface',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArray([
50, // 第一个点经度lon
30, // 第一个点纬度lat
130, // 第二个点经度lon
30, // 第二个点纬度lat
]),
width: 5,
followSurface: true,
material: new Cesium.PolylineGlowMaterialProperty({
glowPower: 0.2,
color: Cesium.Color.BLUE,
}),
},
})
}
// 2、绘制指定颜色的线
function drawSpecifyColorLineHandler() {
viewer.entities.add({
name: 'Red line on the surface',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArray([50, 20, 140, 20]),
width: 5,
material: Cesium.Color.RED,
},
})
}
// 3、绘制指定颜色指定边框颜色的线
function drawSpecifyColorAndOutlineColorLineHandler() {
viewer.entities.add({
name: 'Orange line with black outline at height and following the surface',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArrayHeights([
50, 10, 500000, 140, 10, 250000,
]),
width: 10, // 线宽
material: new Cesium.PolylineOutlineMaterialProperty({
color: Cesium.Color.ORANGE, // 指定颜色
outlineWidth: 2, // 边框的宽度
outlineColor: Cesium.Color.RED, // 指定边框颜色
}),
},
})
}
// 4、绘制指定颜色的箭头静态指示线
function drawSpecifyColorArrowStaticStateLineHandler() {
viewer.entities.add({
name: 'Purple straight arrow at height',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArrayHeights([
50, 0, 500000, 140, 0, 500000,
]),
width: 10,
followSurface: false,
material: new Cesium.PolylineArrowMaterialProperty(
Cesium.Color.YELLOW
),
},
})
}
// 5、绘制虚线
function drawDashedLineHandler(params) {
viewer.entities.add({
name: 'CYAN dashed line',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArrayHeights([
50, -10, 500000, 140, -10, 500000,
]),
width: 4,
material: new Cesium.PolylineDashMaterialProperty({
color: Cesium.Color.CYAN,
}),
},
})
}
// 6、绘制动态的线
function drawDynamicLineHandler(params) {
viewer.entities.add({
name: 'RED dynamic line',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArray([0, 45, 125, 45]),
width: 10,
hMax: 500000,
material: new Cesium.PolylineDynamicMaterialProperty({
color: Cesium.Color.RED,
outlineWidth: 0,
outlineColor: Cesium.Color.BLACK,
}),
},
})
}
// 清除所有实体
function clearAllEntitiesHandler() {
viewer.entities.removeAll()
}
// 高亮当前点击的线段
function activeCurrentClickBtnHandler(idx) {
const btns = document.querySelectorAll('.panel .btn')
Array.from(btns).forEach((btn, index) => {
btn.style.color = index === idx ? 'red' : '#000'
})
}