refactor(core): layer register

src/core/scene.js

@@ -1,5 +1,5 @@
 import Engine from './engine';
-import * as layers from '../layer';
+import { LAYER_MAP } from '../layer';
 import Base from './base';
 import LoadImage from './image';
 import WorkerPool from './worker';
@@ -48,14 +48,14 @@ export default class Scene extends Base {
 
   }
   initLayer() {
-    for (const methodName in layers) {
-      this[methodName] = cfg => {
-        cfg ? cfg.mapType = this.mapType : cfg = { mapType: this.mapType };
-        const layer = new layers[methodName](this, cfg);
+    for (const key in LAYER_MAP) {
+      Scene.prototype[key] = cfg => {
+        const layer = new LAYER_MAP[key](this, cfg);
         this._layers.push(layer);
         return layer;
       };
     }
+
   }
   on(type, hander) {
     if (this.map) { this.map.on(type, hander); }
@@ -83,14 +83,6 @@ export default class Scene extends Base {
   getLayers() {
     return this._layers;
   }
-  _addLight() {
-    // const scene = this._engine._scene;
-    // //const ambientLight = new THREE.AmbientLight(0xaaaaaa);
-    // scene.add(ambientLight);
-
-    // const directionalLight = new THREE.DirectionalLight(0xffffff, 0.5);
-    // scene.add(directionalLight);
-  }
   _addLayer() {
 
   }

src/layer/factory.js

@@ -0,0 +1,11 @@
+export const LAYER_MAP = {};
+export const getLayer = type => {
+  return LAYER_MAP[type.toLowerCase()];
+};
+export const registerLayer = (type, layer) => {
+  if (getLayer(type)) {
+    throw new Error(`Layer type '${type}' existed.`);
+  }
+  // 存储到 map 中
+  LAYER_MAP[type] = layer;
+};

src/layer/index.js

@@ -1,3 +1,17 @@
+import { registerLayer } from './factory';
+import PolygonLayer from './polygonLayer';
+import PointLayer from './pointLayer';
+import LineLayer from './lineLayer';
+import ImageLayer from './imageLayer';
+import RasterLayer from './rasterLayer';
+
+registerLayer('PolygonLayer', PolygonLayer);
+registerLayer('PointLayer', PointLayer);
+registerLayer('LineLayer', LineLayer);
+registerLayer('ImageLayer', ImageLayer);
+registerLayer('RasterLayer', RasterLayer);
+
+export { LAYER_MAP } from './factory';
 export { default as PolygonLayer } from './polygonLayer';
 export { default as PointLayer } from './pointLayer';
 export { default as LineLayer } from './lineLayer';