Hi,
How can you pass parameter inside a loop? For some reason the parameter exists inside the loop but doesn't affect the geometry.
thx

anyone?

You can't do that with a transform sop. Referencing a local variable/attribute in that way would mean that the node evaluates differently per element, which the transform sop does not.

To apply a different transform per point use a point wrangle/vop/expression node. To vary it per primitive use a primitive sop. Alternatively, use one of those nodes, or other nodes to create a transform attribute, (one of matrix, matrix3, quaternion, vector,) and use the transform by attribute sop to apply a varying transformation across multiple points.

For global (detail) attributes, use the detail() expression in the parameter of the transform sop.

ok thanks for the clarification!

If you want to use the Transform SOP as is, and you have no desire to make this into a compile block, the easier thing is to just replace the trivial @PR with:

or
for tagging the input SOP generically.

The prim() expression is an old school method to fetch an attribute based on a specific index. Since all the prims have the same value inside the subnet you can use 0 or the first primitive value.

To make it compile safe, use an attrib wrangle as jsmack indicated above.