How To Copy Normal(s) From A Primitive To A Point.

[Symbolic]

Hi,

I have a moving curve.

I group the final primitive of that curve.

I delete the rest and so I get a moving Primitive.

It has a very beautiful normal.

I then place a point in the center of this primitive with the Point SOP.

and the following expressions:

point poisition X = prim("../end_primitive", $PT, "P", 0)

point poisition Y = prim("../end_primitive", $PT, "P", 1)

point poisition Z = prim("../end_primitive", $PT, "P", 2)

So the point moves together with the primitve.

But is it possible to copy the Normal information of that Primitive to the Point?

I tried AttributeCopy, AttributeTransfer non of them worked.

Probably I am not doing the right thing to make them work.

Any ideas?

Thanks.

[TheUsualAlex]

Use Attribute Promote SOP to convert Primitive to Point type.

[edward]

I think you can also just grab the intrinsic N primitive attribute using the prim() expression. eg.

prim("/obj/model/mygeo", 0, "N", 0)
prim("/obj/model/mygeo", 0, "N", 1)
prim("/obj/model/mygeo", 0, "N", 2)

(for primitive 0 of /obj/model/mygeo)

[Symbolic]

Thanks,

I did not try AttributePromote, I never manage to get those advanced SOPs working. They always complain

about something...

So I went the expression way:

prim("/obj/model/mygeo", 0, "N", 0)

prim("/obj/model/mygeo", 0, "N", 1)

prim("/obj/model/mygeo", 0, "N", 2)

solution. And It worked! Thanks!

NormaFromPrimToPoint3.hip

Edited July 26, 2007 by Symbolic