daynight 目录参考

目录
	sky

文件
	DayNight.cpp
	DayNight.h
	PcgLightingAmbientPhotoMode.cpp
	PcgLightingAmbientPhotoMode.h
	PcgLightingFogPhotoMode.cpp
	PcgLightingFogPhotoMode.h
	PcgLightingSkyboxPhotoMode.cpp
	PcgLightingSkyboxPhotoMode.h
	PcgLightingSunPhotoMode.cpp
	PcgLightingSunPhotoMode.h
	PcgLightingTimePhotoMode.cpp
	PcgLightingTimePhotoMode.h