删除地形时清除绘制的局部等高线

src/BaseDialog/index.js

@@ -48,6 +48,15 @@ class BaseDialog {
     <button class="close">关闭</button>
     `
     this._element.body.appendChild(this._element.foot)
+    let curtain = await document.createElement('div')
+    curtain.style.position = 'absolute'
+    curtain.style.top = '0'
+    curtain.style.left = '0'
+    curtain.style.width = '100%'
+    curtain.style.height = '100%'
+    curtain.style.backdropFilter = 'blur(2px)'
+    curtain.style.zIndex = '-999999'
+    this._element.body.appendChild(curtain)
 
     // 关闭
     let closeBtnsBox = this._element.body.getElementsByClassName('close-box')[0];