修复无光、无阴影时，与InstanceMesh的兼容性问题

src/app/babylon/controller/scene-manager.ts

@@ -58,6 +58,7 @@ import { ModelInfo_mark_multiArrow } from '../model/info/mark/other/mark-plan-mu
 import { ModelInfo_mark_particle } from '../model/info/mark/other/mark-plan-particle-info';
 import { FacilityPosType, ModelData_facility } from '../model/data/model-data/model-data-facility';
 import { LoadTool } from '../tool/load-tool';
+import { flatten } from 'earcut';
 
 
 //场景管理器
@@ -78,7 +79,7 @@ export class SceneManager {
 
 
   static s_openLight: boolean = true;//开启光照效果(关闭是要同时关闭阴影)
-  static s_openShadow: boolean = true;//开启阴影（必须开启阴影）
+  static s_openShadow: boolean = true;//开启阴影（必须开启光照）
   static s_openSkyBox: boolean = true;//使用天空盒
   static s_environmentCubeTexture: CubeTexture;//环境所用的cubeTexture
   static s_openEnvironmentReflection: boolean = true;//使用环境反射
@@ -232,7 +233,7 @@ export class SceneManager {
 
     }
     else {
-      if (this.sunLight == null) {
+      if (this.sunLight != null) {
         this.sunLight.setEnabled(false);
       }
 
@@ -244,7 +245,7 @@ export class SceneManager {
    * 初始化阴影
    */
   public updateShadow() {
-    if (SceneManager.s_openShadow) {
+    if (SceneManager.s_openLight && SceneManager.s_openShadow) {
       if (this.shadowGenerator == null) {
         this.shadowGenerator = new ShadowGenerator(2048, this.sunLight);
       }

src/app/babylon/tool/babylon-tool.ts

@@ -147,10 +147,14 @@ export class BabylonTool {
       ).then(function (result) {
         LoadTool.remove(modelPath);
         isSuccess = true;
+        if (onSuccess) {
           onSuccess(result.meshes, result.particleSystems, result.skeletons, result.animationGroups);
+        }
+
       }).catch(function (result) {
+        if (onError) {
           onError(scene, "load error", result);
-
+        }
       });
 
     // setTimeout(() => {

src/app/babylon/tool/mesh-pool.ts

@@ -307,7 +307,7 @@ export class MeshPoolInfo {
         // let box = MeshBuilder.CreateBox("box", { size: 1 }); //用于测试阴影
         // box.setParent(modelInfo.modelBox);
         // box.position = new Vector3(0, 2, 0);
-        if (SceneManager.s_openShadow) {
+        if (SceneManager.s_openLight && SceneManager.s_openShadow) {
             SceneManager.Instance.shadowGenerator.addShadowCaster(modelInfo.modelBox, true);
             // console.log("添加到阴影", modelInfo.modelBox.name);
         }