[Opensim-users] llTargetOmega : Bug or feature ?

[Dahlia Trimble]

A single prim is essentially a linkset of one prim.

On Fri, Jul 31, 2020 at 9:25 AM Jeff Kelley <opensim at pescadoo.net> wrote:

> At 10:08 PM -0700 7/30/20, Dahlia Trimble wrote:
>
> >You're only setting llTargetOmega in state_entry().
> >Note that if you put that script into the root prim of your linkset, the
> >rotation will be in region coordinates. Since you're only setting it once
> >during state_entry(), changing the orientation of the prim or linkset
> >should have no effect on the spinning axis. It appears to be behaving
> >properly based on your description and is not a bug.
>
>
> This is a single prim and, although the specification does not
> explicitly state that it should rotate around the prim's axis
> (mentioning linksets as an exception), this is observed and desired
> behaviour.
>
> I fail to understand when i should call llTargetOmega outside
> state_entry(), since resetting the script at any time re-issues the
> call.
>
> Invoking llTargetOmega on touch_start() makes no difference, except
> if you take care to stop the rotation first, rotate the prim
> manually, then restart rotation.
>
> integer spinning = FALSE;
>
> default {
>
>      touch_start (integer n) {
>          if (spinning = ! spinning)
>              llTargetOmega ( llRot2Up(llGetLocalRot()), 1, 1);
>          else
>              llTargetOmega ( ZERO_VECTOR, 0, 0);
>      }
>
> }
>
> I admit that rotating a spinning prim manually is not a useful nor
> desirable thing. It happened accidentally in development, when I
> tested the whole thing for different orientations of "the wheel".
>
>
> -- Jeff
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