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())