Feather sway

Go:

Control each feather separately, not like a time offset of one feather.

Notes:

set up one single feather

calculate base @v

give @id attr (might need both point and primitive type)

set up show up start frame and disappear start frame

Base idea: using maketransform(trs, xyz, t, r, s, p) to make transform of each feather by control t(transfrom), r(rotate), s(scale), p(pivot) separately.

to give each feather a unique value of startframe and endframe, use attribute promote

set up scale:

set up rotation:

set up transform of y direction:

maketransform():