Associative arrays have a Z direction option which specifies whether to maintain the original Z direction or to naturally bank the items along a 3D path. How to set the AssocArrayPathParameters to match Z direction?
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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.
I have attached a drawing and a screenshot to verify the Normal. The AssocArray in this drawing has been created with "Maintain Z direction=No". The Normal of the block references are different for each block reference and not equal to [0 0 1].
If you continue to have the issue, can you please share a simplified non-confidential drawing that you are using to verify this ?