Re: [CrystalSpace] #942: Multiplying the iMovable transform might break shaders

#942: Multiplying the iMovable transform might break shaders
----------------------+-----------------------------------------------------
 Reporter:  weltall   |       Owner:  res 
     Type:  defect    |      Status:  new 
 Priority:  major     |   Milestone:      
Component:  renderer  |     Version:  V2.1
 Keywords:            |  
----------------------+-----------------------------------------------------
Description changed by weltall:

Old description:

> we are attempting, under suggestion from jorrit, to resize meshes by
> using the imovable transform instead of a cloned factory (which seems to
> not work correctly with sprcal3d)
> this is what we do:
>
> {{{
>             csRef<iMovable> movable = mesh->GetMovable();
>             csReversibleTransform & trans = movable->GetTransform();
>             csRef<iSpriteCal3DFactoryState> sprite =
> scfQueryInterface<iSpriteCal3DFactoryState>
> (mesh->GetFactory()->GetMeshObjectFactory());
>             scale = scale/sprite->GetScaleFactor();
>             trans.SetO2T(trans.GetO2T() * scale);
>             movable->UpdateMove();
> }}}
>
> (getscalefactor is an additional api added to sprcal3d interface which
> returns the current scale factor of the mesh, it doesn't really matter
> but it seems to make the issue show the resulting size from the transform
> should be higher than the original size of the factor, else, if it's
> lower, it seems to not happen at first look)
> [[Image(http://img850.imageshack.us/img850/252/shot897.png)]]
> if you see the one labeled ulbernaut is the original size, maulberlord is
> lower in size and looks ok, vilenaut is bigger in size and exposes the
> problem.

New description:

 we are attempting, under suggestion from jorrit, to resize meshes by using
 the imovable transform instead of a cloned factory (which seems to not
 work correctly with sprcal3d)
 this is what we do:

 {{{
             csRef<iMovable> movable = mesh->GetMovable();
             csReversibleTransform & trans = movable->GetTransform();
             csRef<iSpriteCal3DFactoryState> sprite =
 scfQueryInterface<iSpriteCal3DFactoryState>
 (mesh->GetFactory()->GetMeshObjectFactory());
             scale = scale/sprite->GetScaleFactor();
             trans.SetO2T(trans.GetO2T() * scale);
             movable->UpdateMove();
 }}}

 (getscalefactor is an additional api added to sprcal3d interface which
 returns the current scale factor of the mesh, it doesn't really matter. It
 seems to make the issue show the resulting size from the transform should
 be higher than the original size of the factor, else, if it's lower, it
 seems to not happen at first look)
 [[Image(http://img850.imageshack.us/img850/252/shot897.png)]]
 if you see the one labeled ulbernaut is the original size, maulberlord is
 lower in size and looks ok, vilenaut is bigger in size and exposes the
 problem.

--

-- 
Ticket URL: <http://www.crystalspace3d.org/trac/CS/ticket/942#comment:1>
CrystalSpace <http://www.crystalspace3d.org/>
Free open-source 3D SDK.
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