Merge branch 'master' of github.com:dvgis/dc-sdk

src/modules/history-track/Track.js

     )
     this._state = State.INITIALIZED
   }
+  get currentDistance() {
+    return distance(Parse.parsePositions(this._pathPositions))
+  }
+  get currentPosition() {
+    const [pos] = this._pathPositions.slice(-1)
+    return Parse.parsePosition(pos)
+  }
+  get allDistance() {
+    return distance(this._positions)
+  }
 
   get trackId() {
     return this._id
               this._positionIndex + 1 === this._positions.length
             )
           this._positionIndex++
+          // 无限循环
+          if (
+            this._options.loop &&
+            this._positionIndex === this._positions.length
+          ) {
+            this._restart()
+          }
         }
       }
     }
     this._setCameraView(viewer, viewOption)
   }
 
+  /**
+   * 重头开始播放动画
+   */
+  _restart() {
+    this._startTime = Cesium.JulianDate.now()
+    this._resetTimeLine({})
+  }
+
   /**
    * Sets camera position
    * @param viewer

src/modules/history-track/TrackController.js

     this._activedTrack && (this._activedTrack.viewed = false)
     this._activedTrack = undefined
     this._viewer.off(SceneEventType.POST_RENDER, this._onPostRender, this)
+    this._viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY)
+    this._viewer.delegate.trackedEntity = undefined
     return this
   }
 }

src/modules/material/property/circle/CircleBlurMaterialProperty.js

   getValue(time, result) {
     result = Cesium.defaultValue(result, {})
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/circle/CircleDiffuseMaterialProperty.js

   getValue(time, result) {
     result = Cesium.defaultValue(result, {})
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/circle/CircleFadeMaterialProperty.js

       result = {}
     }
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/circle/CirclePulseMaterialProperty.js

       result = {}
     }
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/circle/CircleScanMaterialProperty.js

       result = {}
     }
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/circle/CircleSpiralMaterialProperty.js

       result = {}
     }
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/circle/CircleVaryMaterialProperty.js

   getValue(time, result) {
     result = Cesium.defaultValue(result, {})
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/circle/CircleWaveMaterialProperty.js

       result = {}
     }
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
-    result.count = this.count
-    result.gradient = this.gradient
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
+    result.count = Cesium.Property.getValueOrUndefined(this._count, time)
+    result.gradient = Cesium.Property.getValueOrUndefined(this._gradient, time)
     return result
   }
 

src/modules/material/property/ellipsoid/EllipsoidElectricMaterialProperty.js

   getValue(time, result) {
     result = Cesium.defaultValue(result, {})
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/ellipsoid/EllipsoidTrailMaterialProperty.js

   getValue(time, result) {
     result = Cesium.defaultValue(result, {})
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/polyline/PolylineFlickerMaterialProperty.js

       result = {}
     }
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/polyline/PolylineFlowMaterialProperty.js

       result = {}
     }
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
-    result.percent = this._percent
-    result.gradient = this._gradient
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
+    result.percent = Cesium.Property.getValueOrUndefined(this._percent, time)
+    result.gradient = Cesium.Property.getValueOrUndefined(this._gradient, time)
     return result
   }
 

src/modules/material/property/polyline/PolylineImageTrailMaterialProperty.js

     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
     result.image = Cesium.Property.getValueOrUndefined(this._image, time)
     result.repeat = Cesium.Property.getValueOrUndefined(this._repeat, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/polyline/PolylineLightingTrailMaterialProperty.js

     }
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
     result.image = Cesium.Property.getValueOrUndefined(this._image, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/radar/RadarLineMaterialProperty.js

   getValue(time, result) {
     result = Cesium.defaultValue(result, {})
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/radar/RadarSweepMaterialProperty.js

   getValue(time, result) {
     result = Cesium.defaultValue(result, {})
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/radar/RadarWaveMaterialProperty.js

   getValue(time, result) {
     result = Cesium.defaultValue(result, {})
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/wall/WallImageTrailMaterialProperty.js

     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
     result.image = Cesium.Property.getValueOrUndefined(this._image, time)
     result.repeat = Cesium.Property.getValueOrUndefined(this._repeat, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/wall/WallLineTrailMaterialProperty.js

     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
     result.image = Cesium.Property.getValueOrUndefined(this._image, time)
     result.repeat = Cesium.Property.getValueOrUndefined(this._repeat, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/material/property/wall/WallTrailMaterialProperty.js

     }
     result.color = Cesium.Property.getValueOrUndefined(this._color, time)
     result.image = Cesium.Property.getValueOrUndefined(this._image, time)
-    result.speed = this._speed
+    result.speed = Cesium.Property.getValueOrUndefined(this._speed, time)
     return result
   }
 

src/modules/math/midCartesian.js

 import { Cesium } from '../../namespace'
 
 export default function midCartesian(start, end) {
-  let c1 = Cesium.Ellipsoid.WGS84.cartesianToCartographic(start)
-  let c2 = Cesium.Ellipsoid.WGS84.cartesianToCartographic(end)
-  let cm = new Cesium.EllipsoidGeodesic(c1, c2).interpolateUsingFraction(0.5)
-  return Cesium.Ellipsoid.WGS84.cartographicToCartesian(cm)
+  return Cesium.Cartesian3.midpoint(start, end, new Cesium.Cartesian3())
 }

src/modules/measure/draw/DrawPolygon.js

         ...this._style,
         hierarchy: new Cesium.CallbackProperty(() => {
           if (this._positions.length > 2) {
-            return new Cesium.PolygonHierarchy(this._positions)
+            return new Cesium.PolygonHierarchy(
+              this._positions.map((item) => item.clone())
+            )
           } else {
             return null
           }

src/modules/measure/type/DistanceSurface.js

    */
   start(measure, options) {
     this._startHook(measure, options)
-    this._startLabel.label.heightReference =
-      Cesium.HeightReference.CLAMP_TO_GROUND
-    this._resultLabel.label.heightReference =
-      Cesium.HeightReference.CLAMP_TO_GROUND
     new DrawPolyline({
       material: options.material || Cesium.Color.YELLOW.withAlpha(0.6),
       depthFailMaterial: