常量
NRivers|FADE_IN_INVISIBLE_DISTANCE_THRESHOLD
The factor by which FADE_IN_DISTANCE is multiplied is the boundary starting from the river source, where the river is visually invisible.
定义loading_screen/common/defines/jomini/rivers.txt:10
0.5
The factor by which FADE_IN_DISTANCE is multiplied is the boundary starting from the river source, where the river is visually invisible.