1.添加腾讯影像图的支持,2.添加cover函数

src/core/imagery/provider/AmapImageryProvider.js

@@ -16,9 +16,7 @@ const ELEC_URL =
 class AmapImageryProvider extends Cesium.UrlTemplateImageryProvider {
   constructor(options = {}) {
     options['url'] = options.style === 'img' ? IMG_URL : ELEC_URL
-    if (!options.subdomains || !options.subdomains.length) {
-      options['subdomains'] = ['01', '02', '03', '04']
-    }
+    options['subdomains'] = options.subdomains || ['01', '02', '03', '04']
     super(options)
   }
 }

src/core/imagery/provider/GoogleImageryProvider.js

@@ -24,9 +24,7 @@ class GoogleImageryProvider extends Cesium.UrlTemplateImageryProvider {
         : options.style === 'ter'
         ? TER_URL
         : ELEC_URL
-    if (!options.subdomains || !options.subdomains.length) {
-      options['subdomains'] = ['1', '2', '3']
-    }
+    options['subdomains'] = options.subdomains || ['1', '2', '3']
     super(options)
   }
 }

src/core/imagery/provider/TencentImageryProvider.js

@@ -1,20 +1,32 @@
 /**
  * @Author: Caven
- * @Date: 2020-01-21 16:10:47
+ * @Date: 2020-01-21 18:10:47
  */
 
 import ImageryType from '../ImageryType'
 
 const { Cesium } = DC.Namespace
 
+const IMG_URL =
+  'https://p{s}.map.gtimg.com/sateTiles/{z}/{sx}/{sy}/{x}_{reverseY}.jpg?version=400'
+
 const ELEC_URL =
   'https://rt{s}.map.gtimg.com/tile?z={z}&x={x}&y={reverseY}&styleid={style}&scene=0&version=347'
 
 class TencentImageryProvider extends Cesium.UrlTemplateImageryProvider {
   constructor(options = {}) {
-    options['url'] = ELEC_URL.replace('{style}', options.style || 1)
-    if (!options.subdomains || !options.subdomains.length) {
-      options['subdomains'] = ['0', '1', '2']
+    let url = options.style === 'img' ? IMG_URL : ELEC_URL
+    options['url'] = url.replace('{style}', options.style || 1)
+    options['subdomains'] = options.subdomains || ['1', '2', '3']
+    if (options.style === 'img') {
+      options['customTags'] = {
+        sx: (imageryProvider, x, y, level) => {
+          return x >> 4
+        },
+        sy: (imageryProvider, x, y, level) => {
+          return ((1 << level) - y) >> 4
+        }
+      }
     }
     super(options)
   }

src/core/math/curve.js

@@ -0,0 +1,92 @@
+/**
+ * @Author: Caven
+ * @Date: 2020-08-16 11:14:23
+ */
+
+/**
+ * Some of the code borrows from MAPV
+ * https://github.com/huiyan-fe/mapv/blob/3292c7c25dbbf29af3cf7b3acb48108d60b3eed8/src/utils/curve.js
+ */
+export default function curve(points, options) {
+  options = options || {}
+  let curvePoints = []
+  for (let i = 0; i < points.length - 1; i++) {
+    let p = getCurveByTwoPoints(points[i], points[i + 1], options.count)
+    if (p && p.length > 0) {
+      curvePoints = curvePoints.concat(p)
+    }
+  }
+  return curvePoints
+}
+
+/**
+ * Get a curvilinear coordinate set of points based on two points
+ * @param obj1
+ * @param obj2
+ * @param count
+ * @returns {null|[]}
+ */
+function getCurveByTwoPoints(obj1, obj2, count) {
+  if (!obj1 || !obj2) {
+    return null
+  }
+  let curveCoordinates = []
+  count = count || 40 // 曲线是由一些小的线段组成的，这个表示这个曲线所有到的折线的个数
+  let B1 = function(x) {
+    return 1 - 2 * x + x * x
+  }
+  let B2 = x => {
+    return 2 * x - 2 * x * x
+  }
+  let B3 = x => {
+    return x * x
+  }
+
+  let t, h, h2, lat3, lng3, t2
+  let inc = 0
+  let lat1 = parseFloat(obj1.lat)
+  let lat2 = parseFloat(obj2.lat)
+  let lng1 = parseFloat(obj1.lng)
+  let lng2 = parseFloat(obj2.lng)
+
+  // 计算曲线角度的方法
+  if (lng2 > lng1) {
+    if (lng2 - lng1 > 180) {
+      if (lng1 < 0) {
+        lng1 = 180 + 180 + lng1
+        lng2 = 180 + 180 + lng2
+      }
+    }
+  }
+  // 此时纠正了 lng1 lng2
+
+  t2 = 0
+  // 纬度相同
+  if (lat2 === lat1) {
+    t = 0
+    h = lng1 - lng2
+    // 经度相同
+  } else if (lng2 === lng1) {
+    t = Math.PI / 2
+    h = lat1 - lat2
+  } else {
+    t = Math.atan((lat2 - lat1) / (lng2 - lng1))
+    h = (lat2 - lat1) / Math.sin(t)
+  }
+  if (t2 === 0) {
+    t2 = t + Math.PI / 5
+  }
+  h2 = h / 2
+  lng3 = h2 * Math.cos(t2) + lng1
+  lat3 = h2 * Math.sin(t2) + lat1
+
+  for (let i = 0; i < count + 1; i++) {
+    let x = lng1 * B1(inc) + lng3 * B2(inc) + lng2 * B3(inc)
+    let y = lat1 * B1(inc) + lat3 * B2(inc) + lat2 * B3(inc)
+    let lng1_src = obj1.lng
+    let lng2_src = obj2.lng
+    curveCoordinates.push([lng1_src < 0 && lng2_src > 0 ? x - 360 : x, y])
+    inc = inc + 1 / count
+  }
+  return curveCoordinates
+}

src/core/math/index.js

@@ -10,3 +10,4 @@ export { default as distance } from './distance'
 export { default as heading } from './heading'
 export { default as isBetween } from './isBetween'
 export { default as parabola } from './parabola'
+export { default as curve } from './curve'

src/core/option/CameraOption.js

@@ -59,7 +59,7 @@ class CameraOption {
    *
    */
   limitCameraToGround() {
-    this._viewer.camera.changed.addEventListener(framestate => {
+    this._viewer.camera.changed.addEventListener(frameState => {
       if (
         this._viewer.camera._suspendTerrainAdjustment &&
         this._viewer.scene.mode === Cesium.SceneMode.SCENE3D

src/core/utils/Util.js

@@ -8,8 +8,7 @@ const CHARS = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.s
 )
 
 /**
- *  工具类
- *  部分代码借鉴leaflet
+ *  Some of the code borrows from leaflet
  * https://github.com/Leaflet/Leaflet/tree/master/src/core
  */
 class Util {