[Opensim-dev] PRIM_PHYSICS_SHAPE_TYPE and PRIM_PHYSICS_SHAPE_CONVEX missing.

[Teravus Ovares]

I was there during the physics meetings on this on Agni..     The convex
hull checkbox turns the physics proxy into a shape much like if you were to
wrap plastic wrap around the object.   Unlike the current functionality, it
doesn't split them into multiple convex hulls to approximate the concave
areas also.

The other options are physics approximation options.

The general purpose of these options is to give the content creator the
option of reducing the physics load on the simulator which would normally
be tri-mesh.

Also..   where we mesh sculpted prim, Agni, traditionally has been a
spheroid..  but I believe that the items are controllable with scripting
and/or a drop down menu with the right cap response to the cap that
expresses what features the simulator supports.

Best Regards

Teravus


On Wed, Dec 26, 2012 at 10:19 AM, Adams, Robert <robert.adams at intel.com>wrote:

>  BulletSim uses convex hulls for all physical objects. It does not use
> the convex hull that may have been defined in the mesh but it generates an
> approximate convex hull using the HACD algorithm (
> http://codesuppository.blogspot.com/2011/05/hacd-hierarchical-approximate-convex.html
> ).****
>
> ** **
>
> What do you require of the convex hulls?****
>
> ** **
>
> -- ra****
>
> ** **
>
> *From:* opensim-dev-bounces at lists.berlios.de [mailto:
> opensim-dev-bounces at lists.berlios.de] *On Behalf Of *Dahlia Trimble
> *Sent:* Friday, December 21, 2012 5:16 PM
> *To:* opensim-dev at lists.berlios.de
> *Subject:* Re: [Opensim-dev] PRIM_PHYSICS_SHAPE_TYPE and
> PRIM_PHYSICS_SHAPE_CONVEX missing.****
>
> ** **
>
> standard opensim with ODE physics does not support convex hull collision
> shapes. I believe BulletSim does but I don't know if it's been extended
> into the LSL API.****
>
> On Fri, Dec 21, 2012 at 4:43 PM, R.Gunther <rigun at rigutech.nl> wrote:****
>
> i just wanted to try a default example of llSetKeyframedMotion script on
> http://wiki.secondlife.com/wiki/LlSetKeyframedMotion
> The "Universal Hinged Motion in 8 Key Frames" is useing
>
>  llSetLinkPrimitiveParamsFast(LINK_THIS,  [PRIM_PHYSICS_SHAPE_TYPE,
> PRIM_PHYSICS_SHAPE_CONVEX]);
>
> It seems opensim dopnt support [PRIM_PHYSICS_SHAPE_TYPE,
> PRIM_PHYSICS_SHAPE_CONVEX] as setting ?
> Time to dig my own example script up....****
>
>
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>
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