编译中的问题

• 在编辑器中运行时提示没有兼容的载具且没有无人机生成 提示信息：

  There were no compatible vehicles created for current SimMode! Check your settings.json.
  

  在编辑器的运行下拉菜单中，选择选中的视口进行运行。

• 测试时报错：

  test_webmerc_location_to_geo_and_back (smoke.test_geoconversion.TestGeoLocationConversion) ... INFO:  Found the required file in cache!  Carla/Maps/Nav/Town03.bin
  TestGeoLocationConversion.test_webmerc_location_to_geo_and_back
  INFO:  Found the required file in cache!  Carla/Maps/Nav/Town03.bin
  ok
  
  ======================================================================
  FAIL: test_spawn_points (smoke.test_spawnpoints.TestSpawnpoints)
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "D:\hutb\PythonAPI\test\smoke\test_spawnpoints.py", line 73, in test_spawn_points
      if spawn_errors else "Spawn errors detected (no details)"
  AssertionError: True is not false : Spawn errors detected:
    - idx=248, bp=vehicle.bmw.grandtourer, actor_id=0, loc=(42.596,-4.344,0.275), rot=(0.00,-179.14,0.00), error=Spawn failed because of collision at spawn position
  
  ----------------------------------------------------------------------
  Ran 37 tests in 1243.142s
  
  FAILED (failures=1)
  -[Check]: [TIME]: Running smoke test took 1270 seconds.
  SUCCESS: The process with PID 32096 has been terminated.
  -[Check]: [TIME]: Overall testing took 1272 seconds.
  

测试命令：

CarlaUE4.exe --carla-rpc-port=3654 --carla-streaming-port=0 -nosound
python -m nose2 -v smoke.test_spawnpoints.TestSpawnpoints

单独测试生成点测试报错：

INFO:  Found the required file in cache!  Carla/Maps/Nav/Town03.bin
FAIL

======================================================================
FAIL: test_spawn_points (smoke.test_spawnpoints.TestSpawnpoints)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "D:\hutb\PythonAPI\test\smoke\test_spawnpoints.py", line 73, in test_spawn_points
    if spawn_errors else "Spawn errors detected (no details)"
AssertionError: True is not false : Spawn errors detected:
  - idx=248, bp=vehicle.bmw.grandtourer, actor_id=0, loc=(42.596,-4.344,0.275), rot=(0.00,-179.14,0.00), error=Spawn failed because of collision at spawn position

----------------------------------------------------------------------
Ran 1 test in 195.029s

FAILED (failures=1)

原因：在Town03场景中，无人机占用了原来的生成点的位置。

• 执行make launch到BuildCarlaUE4时报错：

  “TRUE”: 未声明的标识符
  
  D:\hutb\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\boost/asio/detail/impl/winsock_init.ipp(36): error C2039: "InterlockedIncrement": ���� "`global namespace'" �ij�Ա
  ...
  D:\hutb\Unreal\CarlaUE4\Plugins\AirSim\Source\Vehicles/Multirotor/MultirotorPawnSimApi.h(85): error C3646: ��collision_response��: 未知重写说明符
  ...
  D:/hutb/Unreal/CarlaUE4/Plugins/AirSim/Source/Vehicles/Multirotor/MultirotorPawnSimApi.cpp(148): error C2660: ��UAirBlueprintLib::LogMessage��: ���������� 2 ������
  ...
    D:/hutb/Unreal/CarlaUE4/Plugins/AirSim/Source/WorldSimApi.cpp(482): error C2671: ��WorldSimApi::setObjectMaterialFromTexture��: ��̬��Ա����û�С�this��ָ��
    D:/hutb/Unreal/CarlaUE4/Plugins/AirSim/Source/WorldSimApi.cpp(508): error C2440: ��<function-style-cast>��: �޷��ӡ�initializer list��ת��Ϊ��WorldSimApi::setObjectMaterialFromTexture::<lambda_ada7d7381434a2d23717f3ff26793be2>��
  

原因：LibCarla\source\compiler\disable-ue4-macros.h 和 LibCarla\source\compiler\enable-ue4-macros.h 中的 carla_air 引入的操作。

#pragma push_macro("InterlockedIncrement")  // 把 UE 的定义压栈保存
#undef InterlockedIncrement                 // 清除 UE 的版本

本质是：在包含第三方头文件前后，用 push/pop 做"宏的现场保护"，防止 UE 宏污染第三方库，也防止第三方库破坏 UE 的宏环境。

解决：wrap boost asio include in ue4 macro bridge