add graticule layer

modules/layer/type/GraticuleLayer.js

@@ -0,0 +1,78 @@
+/**
+  @Author: Caven Chen
+  @Date: 2023-01-12
+**/
+
+import { Cesium } from '@dc-modules/namespace'
+import State from '@dc-modules/state/State'
+import Layer from '../Layer'
+
+const DEF_OPTS = {
+  radialColor: Cesium.Color.WHITE,
+  radialWidth: 2,
+  showRadial: true,
+  LableColor: Cesium.Color.YELLOW,
+  weftColor: Cesium.Color.WHITE,
+  weftWidth: 2
+}
+
+class GraticuleLayer extends Layer {
+  constructor(id, options) {
+    super(id)
+    this._options = {
+      ...DEF_OPTS,
+      ...options
+    }
+    this._delegate = new Cesium.CustomDataSource(id)
+    this._state = State.INITIALIZED
+  }
+
+  get type() {
+    return Layer.getLayerType('graticule')
+  }
+
+  _addedHook() {
+    for (let i = 0; i < 36; i++) {
+      this._delegate.entities.add({
+        polyline: {
+          positions: Cesium.Cartesian3.fromDegreesArray([
+            i * 10,
+            89.5,
+            i * 10,
+            -89.5
+          ]),
+          material: this._options.radialColor,
+          width: this._options.radialWidth
+        },
+        show: this._options.showRadial
+      })
+
+      this._delegate.entities.add({
+        position: Cesium.Cartesian3.fromDegrees(i * 10, 0.0),
+        label: {
+          text: i * 10 + '°',
+          font: '12px',
+          fillColor: this._options.LableColor
+        }
+      })
+    }
+
+    for (let i = 0; i < 18; i++) {
+      let coords = []
+      for (let k = 0; k < 129; k++) {
+        coords.push(-180 + k * (360 / 128), (i < 9 ? i : -i) * 10)
+      }
+      this._delegate.entities.add({
+        polyline: {
+          positions: Cesium.Cartesian3.fromDegreesArray(coords),
+          material: this._options.weftColor,
+          width: this._options.weftWidth
+        }
+      })
+    }
+  }
+}
+
+Layer.registerType('graticule')
+
+export default GraticuleLayer