HScript to get menu parameter items from another node:

opmenu -l ../color1 colortype

where ../color1 is the path to the node, colortype is the ordered menu name of this node.

The expression to activate the solving only in the integer value of the frame:

$FF%1 == 0

For example, if you use sub-steps for source particles once in a frame.

An example of getting the component RZ from the object’s transform:

explodematrix(optransform("path_to_object"), "RST", "XYZ", "RZ")