Falloff Shader
Parameters are accessed with C4DAtom::GetParameter() / C4DAtom::SetParameter() 。见 Parameter IDs .
Parameter: Direction
SLA_FALLOFF_VECTOR
Parameter: Space
SLA_FALLOFF_SPACE
Parameter: Use Bump
SLA_FALLOFF_USE_BUMP
Parameter: 渐变
SLA_FALLOFF_GRADIENT