cesium动态绘制圆，矩形，自定义区域
cesium动态绘制圆，矩形，自定义区域
自己封装了一个类，可以放在js文件中引入项目，具体使用和代码如下
class Draw {
constructor(viewer, config) {
/**cesium实例对象 */
this.viewer = viewer
/**绘制要素的相关配置
* 默认配置
* {
borderColor: Cesium.Color.BLUE, 边框颜色
borderWidth: 2, 边框宽度
material: Cesium.Color.GREEN.withAlpha(0.5),填充材质
}
*/
this.config = config || {
borderColor: Cesium.Color.BLUE,
borderWidth: 2,
material: Cesium.Color.GREEN.withAlpha(0.5),
}
/**存贮绘制的数据 坐标 */
this.infoDetail = { point: [], line: [], rectangle: [], circle: [], planeSelf: [] }
this.handler = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas)
}
/*******
* @function: function
* @return {*}
* @author: xk
* @description: 绘制点数据
*/
drawPoint() {
this.handler.destroy()
this.handler = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas)
this.handler.setInputAction((click) => {
/**点击位置笛卡尔坐标 */
let cartesian = this.viewer.camera.pickEllipsoid(click.position, this.viewer.scene.globe.ellipsoid)
/**笛卡尔转弧度坐标 */
let cartographic = Cesium.Cartographic.fromCartesian(cartesian, this.viewer.scene.globe.ellipsoid, new Cesium.Cartographic())
/**点击位置经度 */
let lng = Cesium.Math.toDegrees(cartographic.longitude)
/**点击位置维度 */
let lat = Cesium.Math.toDegrees(cartographic.latitude)
/**实体的唯一标注 */
let id = new Date().getTime()
this.viewer.entities.add({
position: Cesium.Cartesian3.fromDegrees(lng, lat, 0),
name: 'point',
id: id,
point: {
color: this.config.material,
pixelSize: 12,
outlineColor: this.config.borderColor,
outlineWidth: this.config.borderWidth
}
})
this.infoDetail.point.push({ id: id, position: [lng, lat] })
}, Cesium.ScreenSpaceEventType.LEFT_CLICK)
this.handler.setInputAction((click) => {
this.handler.destroy();
}, Cesium.ScreenSpaceEventType.RIGHT_CLICK)
}
/*******
* @function: function
* @description: 绘制矩形区域
* @return {*}
* @author: xk
*/
drawRectangle() {
this.handler.destroy()
/**
* 矩形四点坐标
*/
let westSouthEastNorth = []
/**实体的唯一标注 */
let id = null
/**地图点击对象 */
this.handler = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas)
this.handler.setInputAction((click) => {
/**点击位置笛卡尔坐标 */
let cartesian = this.viewer.camera.pickEllipsoid(click.position, this.viewer.scene.globe.ellipsoid)
/**笛卡尔转弧度坐标 */
let cartographic = Cesium.Cartographic.fromCartesian(cartesian, this.viewer.scene.globe.ellipsoid, new Cesium.Cartographic())
/**点击位置经度 */
let lng1 = Cesium.Math.toDegrees(cartographic.longitude)
/**点击位置维度 */
let lat1 = Cesium.Math.toDegrees(cartographic.latitude)
/**边框坐标 */
westSouthEastNorth = [lng1, lat1]
id = new Date().getTime()
if (westSouthEastNorth) {
this.handler.removeInputAction(Cesium.ScreenSpaceEventType.LEFT_CLICK)
}
/**面实例对象 */
let polygons = this.viewer.entities.add({
name: 'rectangle',
id: id,
polygon: {
hierarchy: new Cesium.CallbackProperty(function () {
return {
positions: Cesium.Cartesian3.fromDegreesArray(westSouthEastNorth)
}
}),
height: 0,
// 填充的颜色，withAlpha透明度
material: this.config.material,
// 是否被提供的材质填充
fill: true,
// 是否显示
show: true,
},
polyline: {
positions: new Cesium.CallbackProperty(function () { return Cesium.Cartesian3.fromDegreesArray(westSouthEastNorth) }),
material: this.config.borderColor,
width: this.config.borderWidth,
zIndex: 1
}
})
this.handler.setInputAction((move) => {
let cartesian = this.viewer.camera.pickEllipsoid(move.endPosition, this.viewer.scene.globe.ellipsoid)
let cartographic = Cesium.Cartographic.fromCartesian(cartesian, this.viewer.scene.globe.ellipsoid, new Cesium.Cartographic())
let lng = Cesium.Math.toDegrees(cartographic.longitude)
let lat = Cesium.Math.toDegrees(cartographic.latitude)
westSouthEastNorth = [lng1, lat1, lng1, lat, lng, lat, lng, lat1, lng1, lat1]
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE)
}, Cesium.ScreenSpaceEventType.LEFT_CLICK)
this.handler.setInputAction(() => {
this.handler.destroy();
this.infoDetail.rectangle.push({ id: id, position: westSouthEastNorth })
}, Cesium.ScreenSpaceEventType.RIGHT_CLICK)
}
/*******
* @function: function
* @description: 绘制圆形区域
* @return {*}
* @author: xk
*/
drawCircle() {
this.handler.destroy()
/**实体的唯一标注 */
let id = null
/**圆半径 */
let radius = 0
/**圆心 */
let lngLat = []
/**鼠标事件 */
this.handler = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas)
this.handler.setInputAction((click) => {
id = new Date().getTime()
let cartesian = this.viewer.camera.pickEllipsoid(click.position, this.viewer.scene.globe.ellipsoid)
let cartographic = Cesium.Cartographic.fromCartesian(cartesian, this.viewer.scene.globe.ellipsoid, new Cesium.Cartographic())
let lng = Cesium.Math.toDegrees(cartographic.longitude)
let lat = Cesium.Math.toDegrees(cartographic.latitude)
lngLat = [lng, lat]
let entity = this.viewer.entities.add({
position: new Cesium.CallbackProperty(function () { return new Cesium.Cartesian3.fromDegrees(...lngLat, 0) }, false),
name: 'circle',
id: id,
ellipse: {
height: 0,
outline: true,
material: this.config.material,
outlineColor: this.config.borderColor,
outlineWidth: this.config.borderWidth
}
})
entity.ellipse.semiMajorAxis = new Cesium.CallbackProperty(function () { return radius }, false)
entity.ellipse.semiMinorAxis = new Cesium.CallbackProperty(function () { return radius }, false)
if (lngLat) {
this.handler.removeInputAction(Cesium.ScreenSpaceEventType.LEFT_CLICK)
}
this.handler.setInputAction((move) => {
let cartesian2 = this.viewer.camera.pickEllipsoid(move.endPosition, this.viewer.scene.globe.ellipsoid)
radius = Cesium.Cartesian3.distance(cartesian, cartesian2)
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE)
}, Cesium.ScreenSpaceEventType.LEFT_CLICK)
this.handler.setInputAction(() => {
this.infoDetail.circle.push({ id: id, center: lngLat, radius: radius })
this.handler.destroy();
}, Cesium.ScreenSpaceEventType.RIGHT_CLICK)
}
/*******
* @function: function
* @description: 自定义区域绘制
* @return {*}
* @author: xk
*/
drawPlane() {
this.handler.destroy()
/**实体的唯一标注 */
let id = new Date().getTime()
/**记录拐点坐标 */
let positions = [],
/**记录返回结果 */
codeInfo = [],
/**面的hierarchy属性 */
polygon = new Cesium.PolygonHierarchy(),
_polygonEntity = new Cesium.Entity(),
/**面对象配置 */
polyObj = null
this.handler = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas);
// left
this.handler.setInputAction((movement) => {
let cartesian = this.viewer.camera.pickEllipsoid(movement.position, this.viewer.scene.globe.ellipsoid);
let cartographic = Cesium.Cartographic.fromCartesian(cartesian, this.viewer.scene.globe.ellipsoid, new Cesium.Cartographic())
let lng = Cesium.Math.toDegrees(cartographic.longitude)
let lat = Cesium.Math.toDegrees(cartographic.latitude)
if (cartesian && cartesian.x) {
if (positions.length == 0) {
positions.push(cartesian.clone());
}
codeInfo.push([lng, lat])
positions.push(cartesian.clone());
polygon.positions.push(cartesian.clone())
if (!polyObj) {
_polygonEntity.polyline = {
width: this.config.borderWidth,
material: this.config.borderColor,
clampToGround: false
}
_polygonEntity.polyline.positions = new Cesium.CallbackProperty(function () {
return positions
}, false)
_polygonEntity.polygon = {
hierarchy: new Cesium.CallbackProperty(function () {
return polygon
}, false),
material: this.config.material,
clampToGround: false
}
_polygonEntity.name = 'planeSelf'
_polygonEntity._id = id
polyObj = this.viewer.entities.add(_polygonEntity)
}
}
}, Cesium.ScreenSpaceEventType.LEFT_CLICK);
// mouse
this.handler.setInputAction((movement) => {
let cartesian = this.viewer.camera.pickEllipsoid(movement.endPosition, this.viewer.scene.globe.ellipsoid);
let cartographic = Cesium.Cartographic.fromCartesian(cartesian, this.viewer.scene.globe.ellipsoid, new Cesium.Cartographic())
let lng = Cesium.Math.toDegrees(cartographic.longitude)
let lat = Cesium.Math.toDegrees(cartographic.latitude)
if (positions.length >= 0) {
if (cartesian && cartesian.x) {
positions.pop()
positions.push(cartesian);
polygon.positions.pop()
polygon.positions.push(cartesian);
codeInfo.pop()
codeInfo.push([lng, lat]);
}
}
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
// right
this.handler.setInputAction((movement) => {
this.infoDetail.planeSelf.push({ id: id, positions: codeInfo })
this.handler.destroy();
positions.push(positions[0]);
}, Cesium.ScreenSpaceEventType.RIGHT_CLICK);
}
/*******
* @function: function
* @return {*}
* @author: xk
* @description: 绘制线段
*/
drawLine() {
this.handler.destroy()
/**实体的唯一标注 */
let id = null
/**记录拐点坐标 */
let positions = [],
/**记录返回结果 */
codeInfo = [],
/**面的hierarchy属性 */
polygon = new Cesium.PolygonHierarchy(),
_polygonEntity = new Cesium.Entity(),
/**面对象配置 */
polyObj = null
this.handler = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas);
// left
this.handler.setInputAction((movement) => {
id = new Date().getTime()
let cartesian = this.viewer.camera.pickEllipsoid(movement.position, this.viewer.scene.globe.ellipsoid);
let cartographic = Cesium.Cartographic.fromCartesian(cartesian, this.viewer.scene.globe.ellipsoid, new Cesium.Cartographic())
let lng = Cesium.Math.toDegrees(cartographic.longitude)
let lat = Cesium.Math.toDegrees(cartographic.latitude)
if (cartesian && cartesian.x) {
if (positions.length == 0) {
positions.push(cartesian.clone());
}
codeInfo.push([lng, lat])
positions.push(cartesian.clone());
polygon.positions.push(cartesian.clone())
if (!polyObj) {
_polygonEntity.polyline = {
width: this.config.borderWidth,
material: this.config.borderColor,
clampToGround: false
}
_polygonEntity.polyline.positions = new Cesium.CallbackProperty(function () {
return positions
}, false)
_polygonEntity.name = 'line'
_polygonEntity._id = id
polyObj = this.viewer.entities.add(_polygonEntity)
}
}
}, Cesium.ScreenSpaceEventType.LEFT_CLICK);
// mouse
this.handler.setInputAction((movement) => {
let cartesian = this.viewer.camera.pickEllipsoid(movement.endPosition, this.viewer.scene.globe.ellipsoid);
let cartographic = Cesium.Cartographic.fromCartesian(cartesian, this.viewer.scene.globe.ellipsoid, new Cesium.Cartographic())
let lng = Cesium.Math.toDegrees(cartographic.longitude)
let lat = Cesium.Math.toDegrees(cartographic.latitude)
if (positions.length >= 0) {
if (cartesian && cartesian.x) {
positions.pop()
positions.push(cartesian);
codeInfo.pop()
codeInfo.push([lng, lat]);
}
}
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
// right
this.handler.setInputAction((movement) => {
this.infoDetail.line.push({ id: id, positions: codeInfo })
this.handler.destroy();
}, Cesium.ScreenSpaceEventType.RIGHT_CLICK);
}
/*******
* @function: function
* @description: 移除实体对象
* @return {*}
* @author: xk
*/
removeEntity() {
this.handler = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas)
this.handler.setInputAction((move) => {
/**实体对象信息 {id：entities，primitive：。。} */
let pick = this.viewer.scene.pick(move.endPosition);
if (pick && pick.id && pick.id.id) {
document.body.style.cursor = "pointer";
this.handler.setInputAction((click) => {
let newPoint
switch (pick.id.name) {
case 'point':
/**删除某一条数据 */
newPoint = this.infoDetail.point.filter(item => item.id != pick.id._id)
this.infoDetail.point = newPoint
break
case 'line':
/**删除某一条数据 */
newPoint = this.infoDetail.line.filter(item => item.id != pick.id._id)
this.infoDetail.line = newPoint
break
case 'rectangle':
/**删除某一条数据 */
newPoint = this.infoDetail.rectangle.filter(item => item.id != pick.id._id)
this.infoDetail.rectangle = newPoint
break
case 'planeSelf':
/**删除某一条数据 */
newPoint = this.infoDetail.planeSelf.filter(item => item.id != pick.id._id)
this.infoDetail.planeSelf = newPoint
break
case 'circle':
/**删除某一条数据 */
newPoint = this.infoDetail.circle.filter(item => item.id != pick.id._id)
this.infoDetail.circle = newPoint
break
default: break
}
this.viewer.entities.remove(pick.id)
}, Cesium.ScreenSpaceEventType.LEFT_CLICK)
} else {
document.body.style = "cursor: default;";
}
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE)
}
/*******
* @function: function
* @return {*}
* @author: xk
* @description: 返回绘制数据
*/
backInfoDetail() {
return this.infoDetail
}
}
使用
let draw = new Draw(viewer，{borderColor:Cesium.Color.RED,material:Cesium.Color.BLUE.withAlpha(0.5)}) //viewer 初始化的cesium对象,自定义配置项，可以不用，就使用默认样式
draw.drawCircle() //圆形区域
draw.drawRectangle()//矩形区域
draw.drawPlane()//自定义区域绘制
draw.removeEntity()//移除选区 鼠标移动到上面 点击清除
//一般是绑定在具体的按钮上，来判断要执行哪一个绘制方法 左键点击绘制，右键点击结束