Inqy Wei

Perfect! Thank you so much for your help.

Thanks for the swift response. The script gets the position from an external source in the form of latitude and longitude. The root prim is a sphere representing the earth, with North at the top. The child prim is ideally a thin cylinder (small z) placed just above the surface of the sphere.

I want to use llSetLinkPrimitiveParams to put a disk (child prim), flat against the surface of a larger sphere (root prim). I have found how to calculate the cartesian coordinates (this is starting from latitude/longitude basically) to put the child in the right place with PRIM_POSITION but nothing I have tried with, for example, llRotBetween() seems to put the child in the correct orientation (using either: PRIM_ROTATION or PRIM_ROT_LOCAL). Has anyone done this (or knows how to)?