llSetLinkPrimitiveParams function

[Zoraster Lunardi]

Hi

Does the PRIM_POSITION parameter work in the llSetLinkPrimitiveParams function?

I have constructed a test script with 5 basic PRIMS linked together. My other link functions are working.

This is the code line I am using: llSetLinkPrimitiveParams(5, [PRIM_POSITION, PRIMPOS2]);

I am trying to move one linked PRIM in a linked set.

Zor



[Void Singer]

yes, but you may have missed the part where it GETs region position, but SETs local position. (and small changes don't register to the viewer when attached unless the object gets a full update)

[Rufus Darkfold]

PRIMPOS2 needs to be local to the root prim for Set.  Note that the corresponding Get functions return REGION coordinates, not local coordinates.  If you pass a region coordinate to PRIM_POSITION for a child prim, it would usually result in a move of more than 65 meters, which causes it not to move at all.

 

[Zoraster Lunardi]

Yes - that was it. - Thanks

[Zoraster Lunardi]

OK – Cool.

But you say there is no way to request the relative local position?



[Zoraster Lunardi]

I can see that I can make my app work – but it will be a bit more tedious. I am trying to make a subset of PRIMS move as a single sub object.

It would be fairly straight forward if I could get each child object to move relative to its own local position.





[Rufus Darkfold]

This thread tells how to get the current local position:

http://community.secondlife.com/t5/LSL-Scripting/Moving-a-child-prim-with-llSetLinkPrimitiveParams/td-p/1011663

[Dora Gustafson]

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Zoraster Lunardi wrote:

I can see that I can make my app work – but it will be a bit more tedious. I am trying to make a subset of PRIMS move as a single sub object.

It would be fairly straight forward if I could get each child object to move relative to its own local position.

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The local position can be computed if you know:

1. the child's global position
2. the root's position
3. the root's rotation

This snippet can compute any child prims local position even if it is in another prim in the linkset

integer dg; // child prim numberlist childPR = llGetLinkPrimitiveParams( dg, [PRIM_POSITION]);vector local_pos = (llList2Vector( childPR, 0)-llGetRootPosition())/llGetRootRotation();

 

[Void Singer]

please note that llGetRootRotation should not be used for objects that will be attacments...

llGetLocalRot() //-- is what you want when called from the root

or

llList2Rot( llGetLinkPrimitiveParams( LINK_ROOT, [PRIM_ROT_LOCAL] ), 0 ) //-- called from any prim if it's a set

or

llList2Rot( llGetLinkPrimitiveParams( !!llGetLinkNumber, [PRIM_ROT_LOCAL] ), 0 ) //-- called from any prim, linkset or not.