优化二维模式时的键盘移动事件

src/Global/KeyBoard/index.js

@@ -101,6 +101,7 @@ function getFlagFromKeyboard(key) {
  */
 function keyDown(event) {
   let _viewer = this
+
   // 判断是否有输入框聚焦
   function isInputFocused() {
     const activeElement = document.activeElement;
@@ -164,33 +165,52 @@ function keyUp(event) {
  * @return {*}
  */
 function keyboardMapRoamingRender(_viewer) {
-  if(!_viewer.scene.screenSpaceCameraController.enableTilt) {
+  if(!_viewer || !_viewer.scene || !_viewer.scene.screenSpaceCameraController.enableTilt) {
     return
   }
   let camera = _viewer.camera;
   let ellipsoid = _viewer.scene.globe.ellipsoid;
   let cameraHeight = ellipsoid.cartesianToCartographic(camera.position).height;
+  let cameraHeight2 = camera.positionCartographic.height;
+
 
   // 根据相机高度设置移动距离，比默认距离移动效果更好
   let moveRate = cameraHeight / 20.0;
   let rotationRate = moveRate / 500000 / Cesium.Math.toDegrees(camera.pitch);
+  let moveRate2 = cameraHeight2 / 100.0;
 
   if (flags.moveForward) {
-    // camera.moveForward(moveRate);
+    if(_viewer.scene.mode == 2) {
+      camera.moveUp(moveRate2);
+    }
+    else {
       camera.rotate(camera.right, -rotationRate);
     }
+  }
   if (flags.moveBackward) {
-    // camera.moveBackward(moveRate);
+    if(_viewer.scene.mode == 2) {
+      camera.moveDown(moveRate2);
+    }
+    else {
       camera.rotate(camera.right, rotationRate);
     }
+  }
   if (flags.moveLeft) {
-    // camera.moveLeft(moveRate);
+    if(_viewer.scene.mode == 2) {
+      camera.moveLeft(moveRate2);
+    }
+    else {
       camera.rotate(camera.up, -rotationRate);
     }
+  }
   if (flags.moveRight) {
-    // camera.moveRight(moveRate);
+    if(_viewer.scene.mode == 2) {
+      camera.moveRight(moveRate2);
+    }
+    else {
       camera.rotate(camera.up, rotationRate);
     }
+  }
   if (flags.moveUp) {
     camera.moveUp(moveRate);
   }