This is important for effects like drop shadows.
feOffset(input = NA, dx = unit(0, "npc"), dy = unit(0, "npc"), default.units = "npc", ...)
filterInputs
.
input
by along the x-axis.
input
by along the y-axis.
dx
or
dy
are only given as numeric vectors.
fe
.
fe.offset
object.
filterEffect
, fe
.