fix: rotation初始化错误

src/sdk/cover/index.js

@@ -411,7 +411,7 @@ export const enter = (dom, isLocal) => {
             if(props.type == 'obj') props.type = 'glb'
             props.scale /= 100 
             if(props.rotation){
-                if(props.rotation._x = void 0 && props.rotation.x != void 0){
+                if(props.rotation._x == void 0 && props.rotation.x != void 0){
                     props.rotation = new THREE.Euler().setFromVector3(props.rotation)
                 }
             }