Hello,
Sorry, There is no such AssocArrayPathParameter property that will control the Z direction of the associative array.
For the same reason, it is also not possible to change the Z direction in the AutoCAD UI properties palette after the Associative array has been created. For example, you can change the "AlignItems" property using the properties palette but there is no such "Maintain Z direction" property.
I think when an AssocArray is created using the AutoCAD UI, the Z direction is set for the block references after the AssocArray is created. I have attached two screenshots that show the Normal value for the BlockReferences that represent the AssocArray for "Maintain Z direction=Yes" and "Maintain Z direction=No".
The Normal direction for the block reference can be computed based on the position of the block reference and the normal at a point on the path curve which is closest to the position of the block reference.
Balaji
Developer Technical Services
Autodesk Developer Network