[Opensim-users] llCastRay and object shapes

[Handy Low]

Gwyneth Llewelyn <gwyneth.llewelyn <at> gwynethllewelyn.net> writes:

> 
> Hi Handy,
> 
> Just for the sake of completeness, did you test with ODE or BulletSim? I 
believe the implementation might be
> slightly different (or, then again, it's just my not-so-precise testing).
> 
> Thanks,
> 
> 	- Gwyn
> 
> On 25/02/2014, at 16:09, Handy Low wrote:
> 
> > Currently it seems that the OpenSim implementation of llCastRay() gives 
> > coordinates on a target object that lie on the bounding box of the 
object 
> > rather than on the face of the prim itself.
> > 
> > For example, casting a ray at a pair of linked cubes in OpenSim will 
generate 
> > coordinates that lie on the cuboid bounding box that constrains both 
cubes. 
> > Likewise, casting a ray at a sphere will generate a point on the 
sphere's 
> > cubic bounding box.
> > 
> > In SL, the same tests will both return points on the prim surfaces.
> > 
> > Is this expected behaviour?
> > 
> > Thanks

Thanks to Michael and Gwen for the fast replies.

Off the top of my head, I don't know which physics engine they were using, 
or how I can find out - the tests I've been doing have been in OSGrid 
(Sandbox Plaza) and in Kitely, if that's any help.

--
Handy