Since | 17.0 |
matrix getpackedtransform(int input, int primnum)
Gets the transform of a packed primitive. This is constructed from the P
attribute of the primitive’s point and its intrinsic transform
.
Warning
This function builds a transform from only the P
(position) attribute and the transform
intrinsic attribute. It ignores various details that the packedfulltransform
intrinsic attribute includes:
-
The packed primitive’s
pivot
intrinsic attribute. -
Instancing attributes such as
orient
(when thepointinstancetransform
intrinsic attribute is on, as with crowd agents). -
The
packedlocaltransform
intrinsic attribute (Alembic primitives).
So this function will not return the expected transform in several different cases.
The setpackedtransform function has the same issues since it only overwrites P
and transform
. So, for example, the packedfulltransform
won’t contain the matrix you would expect if there is a non-zero packed pivot, or in the other cases listed above.
Examples ¶
// matrix to transform by matrix transform = ident(); rotate(transform, radians(45), {0,1,0}); translate(transform, {0,1,0}); matrix tf = getpackedtransform(0, @primnum); setpackedtransform(0, @primnum, transform * tf);
See also | |
transform |