To do this you need to add proper orient attributes to your input packed point primitives and make sure to enable the Copy SOPs orient attribute toggle.
See the attached scene file for a discrete solution where I insert two SOPs, one above the transform that initializes N and up as orient vectors which are transformed, then after an attribute wrangle SOP that creates a vector size attribute that copies the transform SOPs scale parameters.
I put in two solutions. One that is discrete as mentioned above and one where I ceased a transform_orient SOP that is a simple asset wrapper with a Pack, the two wrangle SOPs and the Transform SOP and promoted the transform handle up so it is pretty much identical to the Transform SOP but with the extra orient attributes created and you end up with a packed primitive for the Copy SOP.
The Copy SOP uses template attributes to do control the Transforms of the copied data. See the help for the Copy SOP.
I used the simplest attributes available by exact name to build a TRS transform:
N
up
scale
There is also float pscale which applies a uniform scale which the transform SOP doesn't support (Primitive SOP does but is a different SOP for different purposes).
Hope that helps.
I like to make things as discrete as possible and try to put as much smarts as possible up the chain as long as it is lightweight. With packed prime and alembics, this is really powerful.
These same attributes are used by Mantra for instancing geometry as well. The Copy SOP is a fabulous instancer now if you feed in packed primitives (alembics, packed prims) in to the left input as well.
Oh and this is an H14 file.
Finally!!!!!
