fix：新增例程

基础使用/e5.RflySim3D载具样式切换实验/code/LoadModelsByTxt.py

@@ -0,0 +1,21 @@
+import time
+import math
+import sys
+import os
+import UE4CtrlAPI as UE4CtrlAPI
+#Create a new MAVLink communication instance, UDP sending port (CopterSim’s receving port) is 20100
+ue = UE4CtrlAPI.UE4CtrlAPI()
+# sendUE4Cmd: RflySim3D API to modify scene display style
+# Format: ue.sendUE4Cmd(cmd,windowID=-1), where cmd is a command string, windowID is the received window number (assuming multiple RflySim3D windows are opened at the same time), windowID =-1 means sent to all windows
+# Augument: RflyChangeMapbyName command means to switch the map (scene), the following string is the map name, here will switch all open windows to the grass map
+ue.sendUE4Cmd('RflyChangeMapbyName Grasslands') 
+
+   
+time.sleep(2)  
+imPath = os.path.join(sys.path[0],'Grasslands.txt')
+# 此处使用RflyLoad3DFile命令来加载txt格式场景创建文件
+str = 'RflyLoad3DFile ' + imPath 
+print(str)
+ue.sendUE4Cmd(str.encode())
+print(str.encode())
+