sdk4.0_new/src/Obj/Analysis/Visibility/index.js

/*
 *通视分析
 * @Author: Wang jianLei
 * @Date: 2022-04-17 22:04:52
 * @Last Modified by: Wang JianLei
 * @Last Modified time: 2022-04-17 22:05:13
 */
import Tools from "../../../Tools";
import Event from "../../../Event";
import MouseTip from "../../../MouseTip";
import EventBinding from '../../Element/Dialog/eventBinding';
import Dialog from '../../../BaseDialog';
import { html } from "./_element";
class VisibilityAnalysis extends Tools {
  constructor(sdk, options = {}, _Dialog = {}) {
    super(sdk, options)
    this.viewer = sdk.viewer;
    this.resultObject = {
      viewPoint: undefined, //通视分析起点
      targetPoints: [], //通视分析目标点集合
      targetPoint: undefined, //当前目标点
      objectExclude: [], //射线排除集合
      entities: [], //创建的Entity对象
    };
    this.options = {}
    this._elms = {};
    this.viewPointHeight = options.viewPointHeight
    this.Dialog = _Dialog
    this._EventBinding = new EventBinding()
    this.tools = new Tools(this.sdk)
    YJ.Analysis.AnalysesResults.push(this)
    // VisibilityAnalysis.edit(this)
    VisibilityAnalysis.create(this)

  }

  get viewPointHeight() {
    return this.options.viewPointHeight
  }

  set viewPointHeight(v) {
    let viewPointHeight = Math.floor(Number(v) * 10) / 10
    if (isNaN(viewPointHeight)) {
      viewPointHeight = 1.8
    }
    if (viewPointHeight < 0) {
      viewPointHeight = 0
    }
    this.options.viewPointHeight = viewPointHeight
    this._elms.viewPointHeight && this._elms.viewPointHeight.forEach((item) => {
      item.value = viewPointHeight
    })
  }

  static create(that) {
    if (!YJ.Measure.GetMeasureStatus()) {
      if (that._DialogObject && that._DialogObject.close) {
        that._DialogObject.close()
        that._DialogObject = null
      }
      that.event = new Event(that.sdk)
      that.tip = new MouseTip('左键点击创建视角起点', that.sdk)
      YJ.Measure.SetMeasureStatus(true)
      let count = 0;
      that.event.mouse_left(async (movement, cartesian) => {
        that.tip.set_text("左键创建视角终点，右键结束通视分析")
        if (!that.resultObject.viewPoint) {
          let pos84 = that.cartesian3Towgs84(cartesian, that.viewer)
          let positions
          if (that.sdk.viewer.terrainProvider.availability) {
            positions = await Cesium.sampleTerrainMostDetailed(
              that.sdk.viewer.terrainProvider,
              [Cesium.Cartographic.fromDegrees(pos84.lng, pos84.lat)]
            );
          }
          if (positions && positions[0].height > pos84.alt) {
            pos84.alt = positions[0].height
          }
          pos84.alt = pos84.alt + that.viewPointHeight
          let pos = Cesium.Cartesian3.fromDegrees(pos84.lng, pos84.lat, pos84.alt)
          that.resultObject.viewPoint = pos;
          let pointEntity = that.viewer.entities.add({
            position: pos,
            point: {
              color: Cesium.Color.YELLOW,
              pixelSize: 5,
            },
          });
          that.resultObject.objectExclude.push(pointEntity);
          that.resultObject.entities.push(pointEntity);
        } else {
          that.resultObject.targetPoint = cartesian;
          let pointEntity = that.viewer.entities.add({
            position: cartesian,
            point: {
              color: Cesium.Color.YELLOW,
              pixelSize: 5,
            },
          });
          that.resultObject.objectExclude.push(pointEntity);
          that.resultObject.entities.push(pointEntity);
          let direction = Cesium.Cartesian3.normalize(
            Cesium.Cartesian3.subtract(
              that.resultObject.targetPoint,
              that.resultObject.viewPoint,
              new Cesium.Cartesian3()
            ),
            new Cesium.Cartesian3()
          );

          let ray = new Cesium.Ray(that.resultObject.viewPoint, direction);
          let pickedObjects = that.viewer.scene.drillPickFromRay(ray);
          let result = {}
          for (let i = 0; i < pickedObjects.length; i++) {
            if (pickedObjects[i].position) {
              result = pickedObjects[i]
              break
            }
          }
          // let result = that.viewer.scene.pickFromRay(
          //   ray,
          //   that.resultObject.objectExclude
          // ); // 计算交互点，返回第一个
          if (result) {
            let dis0 = VisibilityAnalysis.distance(
              that.resultObject.viewPoint,
              that.resultObject.targetPoint
            );
            let dis1 = VisibilityAnalysis.distance(
              that.resultObject.viewPoint,
              result.position || cartesian
            );
            let dis2 = VisibilityAnalysis.distance(
              result.position || cartesian,
              that.resultObject.targetPoint
            );
            if (dis0 > dis1) {
              let _poly0 = that.viewer.entities.add({
                polyline: {
                  positions: [that.resultObject.viewPoint, result.position],
                  material: Cesium.Color.GREEN,
                  width: 3,
                  zIndex: 99999999
                },
              });
              that.resultObject.entities.push(_poly0);
              let _poly1 = that.viewer.entities.add({
                polyline: {
                  positions: [result.position, that.resultObject.targetPoint],
                  material: Cesium.Color.RED,
                  width: 3,
                  zIndex: 99999999
                },
              });
              that.resultObject.entities.push(_poly1);
              that.resultObject.targetPoints.push({
                targetPoint: cartesian,
                visual: false, //如果dis2足够小，其实他是可视的
                distance: [dis0, dis1, dis2], //[初始点和终点，初始点和交点，交点和终点]
              });
            } else {
              let _poly2 = that.viewer.entities.add({
                polyline: {
                  positions: [
                    that.resultObject.viewPoint,
                    that.resultObject.targetPoint,
                  ],
                  material: Cesium.Color.GREEN,
                  width: 3,
                  zIndex: 99999999
                },
              });
              that.resultObject.entities.push(_poly2);
              that.resultObject.targetPoints.push({
                targetPoint: cartesian,
                visual: true, //如果dis2足够小，其实他是可视的
                distance: [dis0, dis1, dis2], //[初始点和终点，初始点和交点，交点和终点]
              });
            }
          }
        }
      })
      that.event.mouse_move((movement, cartesian) => {
        that.tip.setPosition(cartesian, movement.endPosition.x, movement.endPosition.y)
      })
      that.event.mouse_right((movement, cartesian) => {
        that.end()
      })
      that.event.gesture_pinck_start((movement, cartesian) => {
        let startTime = new Date()
        that.event.gesture_pinck_end(() => {
          let endTime = new Date()
          if (endTime - startTime >= 500) {
            that.end()
          }
        })
      })
    }
    else {
      that.tools.message({
        text: '上一次测量未结束',
        type: 'warning',
      });
    }


  }
  end() {
    YJ.Measure.SetMeasureStatus(false)
    this.tip && this.tip.destroy()
    this.event && this.event.destroy()
    this.tip = null
    this.event = null
  }

  // static update(that) {
  //   if (!that.resultObject.viewPoint) {
  //     return
  //   }
  //   for (let i = that.resultObject.entities.length - 1; i >= 0; i--) {
  //     if (that.resultObject.entities[i].point) {
  //       that.viewer.entities.remove(that.resultObject.entities[i]);
  //       that.resultObject.entities.splice(i, 1)
  //     }
  //   }
  //   setTimeout(() => {
  //     for (let i = 0; i < that.resultObject.targetPoints.length; i++) {
  //       that.resultObject.targetPoint = that.resultObject.targetPoints[i].targetPoint;
  //       let direction = Cesium.Cartesian3.normalize(
  //         Cesium.Cartesian3.subtract(
  //           that.resultObject.targetPoint,
  //           that.resultObject.viewPoint,
  //           new Cesium.Cartesian3()
  //         ),
  //         new Cesium.Cartesian3()
  //       );
  //       let ray = new Cesium.Ray(that.resultObject.viewPoint, direction);
  //       let pickedObjects = that.viewer.scene.drillPickFromRay(ray);
  //       let result = {}
  //       for (let i = 0; i < pickedObjects.length; i++) {
  //         if (pickedObjects[i].position) {
  //           result = pickedObjects[i]
  //           break
  //         }
  //       }
  //       // let result = that.viewer.scene.pickFromRay(
  //       //   ray,
  //       //   that.resultObject.objectExclude
  //       // ); // 计算交互点，返回第一个
  //       if (result) {
  //         let dis0 = VisibilityAnalysis.distance(
  //           that.resultObject.viewPoint,
  //           that.resultObject.targetPoint
  //         );
  //         let dis1 = VisibilityAnalysis.distance(
  //           that.resultObject.viewPoint,
  //           result.position || cartesian
  //         );
  //         let dis2 = VisibilityAnalysis.distance(
  //           result.position || cartesian,
  //           that.resultObject.targetPoint
  //         );
  //         if (dis0 > dis1) {
  //           let _poly0 = that.viewer.entities.add({
  //             polyline: {
  //               positions: [that.resultObject.viewPoint, result.position],
  //               material: Cesium.Color.GREEN,
  //               width: 3,
  //               zIndex: 99999999
  //             },
  //           });
  //           that.resultObject.entities.push(_poly0);
  //           let _poly1 = that.viewer.entities.add({
  //             polyline: {
  //               positions: [result.position, that.resultObject.targetPoint],
  //               material: Cesium.Color.RED,
  //               width: 3,
  //               zIndex: 99999999
  //             },
  //           });
  //           that.resultObject.entities.push(_poly1);
  //         } else {
  //           let _poly2 = that.viewer.entities.add({
  //             polyline: {
  //               positions: [
  //                 that.resultObject.viewPoint,
  //                 that.resultObject.targetPoint,
  //               ],
  //               material: Cesium.Color.GREEN,
  //               width: 3,
  //               zIndex: 99999999
  //             },
  //           });
  //           that.resultObject.entities.push(_poly2);
  //         }
  //       }
  //     }
  //   }, 1000);
  // }

  static async edit(that) {
    if (that._DialogObject && that._DialogObject.close) {
      that._DialogObject.close()
      that._DialogObject = null
    }
    that._DialogObject = await new Dialog(that.sdk.viewer._container, {
      title: '多点视线分析', left: '180px', top: '100px',
      closeCallBack: () => {
        that.Dialog.closeCallBack && that.Dialog.closeCallBack()
        YJ.Measure.SetMeasureStatus(false)
      },
    })
    await that._DialogObject.init()
    that._DialogObject._element.body.className = that._DialogObject._element.body.className + ' visibility'
    let contentElm = document.createElement('div');
    contentElm.innerHTML = html()
    that._DialogObject.contentAppChild(contentElm)

    let drawElm = document.createElement('button')
    drawElm.innerHTML = '绘制'
    drawElm.addEventListener('click', () => {
      VisibilityAnalysis.create(that)
    })
    that._DialogObject.footAppChild(drawElm)

    let all_elm = contentElm.getElementsByTagName("*")
    that._EventBinding.on(that, all_elm)
    that._elms = that._EventBinding.element
  }

  //空间两点间距离
  static distance(point1, point2) {
    let point1cartographic = Cesium.Cartographic.fromCartesian(point1);
    let point2cartographic = Cesium.Cartographic.fromCartesian(point2);
    /**根据经纬度计算出距离**/
    let geodesic = new Cesium.EllipsoidGeodesic();
    geodesic.setEndPoints(point1cartographic, point2cartographic);
    let s = geodesic.surfaceDistance;
    //返回两点之间的距离
    s = Math.sqrt(
      Math.pow(s, 2) +
      Math.pow(point2cartographic.height - point1cartographic.height, 2)
    );
    return s;
  }
  destroy() {
    this.resultObject.entities.forEach((element) => {
      this.viewer.entities.remove(element);
    });
    this.resultObject = {
      viewPoint: undefined, //通视分析起点
      targetPoints: [], //通视分析目标点集合
      targetPoint: undefined, //当前目标点
      objectExclude: [], //射线排除集合
      entities: [], //创建的Entity对象
    };
    this.tip && this.tip.destroy()
    this.event && this.event.destroy()
    this.tip = null
    this.event = null
    YJ.Measure.SetMeasureStatus(false)
  }
}

export default VisibilityAnalysis;