Merge pull request '添加视角限制' (#140) from LJ into dev

Reviewed-on: http://git.feashow.cn/clay/tunnel-cloud-web/pulls/140

src/components/content/tunnelScene/sceneClass/demo.js

@@ -181,9 +181,12 @@ export default class Demo {
       this.camera,
       this.renderer.domElement
     );
-    this.orbitControls.object.position.set(-27.285, 16.356, -54.925);
-    //限制轨道控制器的视角变化
-    this.orbitControls.maxPolarAngle = Math.PI * (3 / 5);
+    //初始化轨道控制器
+    this.orbitControls.object.position.set(-29, 18, -50)
+    this.orbitControls.maxPolarAngle = Math.PI * (3.17 / 6);
+    this.orbitControls.minPolarAngle = Math.PI * (2 / 6);
+    this.orbitControls.minDistance = 19;
+    this.orbitControls.maxDistance = 87;
     // 监听控制器变化
     this.orbitControls.addEventListener("end", handleEndChange.bind(this));
     this.orbitControls.addEventListener("start", handleStartChange.bind(this));