Rotating child prims on an attached object

[alteredblvck]

I'm working on an attached accessory and I'm trying to figure out how to rotate only certain linked prims. I do not want to rotate the root as it rotates the whole object. I have 6 linked prims including the root. I need to rotate/spin prims 2, 4, 5 and 6 on the z axis. The prims needs to rotate around the z axis, in place. I'm not trying to create an orbiting object.

I've been messing around for days but can't figure it out. llSetLinkPrimitiveParamsFast doesn't work on child prims on an attached object went it comes to rotation by the looks of it. And TargetOmega only spins the object client side.

 

Any help would be amazing.

[Quistess Alpha]

To rotate the child prim 20 degrees on it's own z-axis:

rotation Z20 = llAxisAngle2Rot(<0,0,1>,20*DEG_TO_RAD);
// for example 
integer link = 2;
rotation rChild = llList2Rot(llGetLinkPrimitiveParams(link,[PRIM_ROTATION]),0);
llSetLinkPrimitiveParamsFast(link,
[   PRIM_ROT_LOCAL,  (Z20*rChild)/llGetRootRotation()
]);

for root's axes, swap the order of the change and orientation rotations:

[   PRIM_ROT_LOCAL,  (rChild*Z20)/llGetRootRotation() 

 

Edited April 11 by Quistess Alpha