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Thank you I will read it.
Leigh
On 9/29/2010 11:37 PM, Shaun Kime wrote:
> Take a look at the following presentation:
> http://artis.inrialpes.fr/Recherche/RealTimeShadows/pdf/stencil.pdf ,
> especially section 5: Improving Planar Projected Shadows with Stencil
>
> Thanks,
> Shaun Kime
>
> On Wed, Sep 29, 2010 at 5:30 PM, Simon Kozlov <[email protected]
> <mailto:[email protected]>> wrote:
>
> One alternative for fixed-function pipeline is to put height-dependent
> value in alpha channel and use alpha test to clip parts below the
> ground.
>
> Simon
>
> On Wed, Sep 29, 2010 at 2:09 PM, Jeff Russell
> <[email protected] <mailto:[email protected]>> wrote:
> > You may still be able to clip without a shader - opengl has user
> clip planes
> > available in some versions, check your docs.
> >
> > The alternative is you could not completely flatten your
> geometry, just
> > "mostly" flatten it so that it appears flat enough. Then you can
> still have
> > your matrix set up to keep the unwanted geometry below the
> ground plane, and
> > the depth test against the ground geometry will take care of it.
> >
> > On Wed, Sep 29, 2010 at 3:57 PM, [email protected]
> <mailto:[email protected]>
> > <[email protected] <mailto:[email protected]>> wrote:
> >>
> >> Thanks but it's OpenGL 1.0 for BlackBerry and 1.1 for Android.
> So far
> >> my solutions is, well, don't push the rocks so far into the
> ground :)
> >>
> >> Leigh
> >>
> >> On 9/29/2010 11:53 AM, Jeff Russell wrote:
> >> > Yes there is - clip your shadow geometry against the ground plane
> >> > before it gets flattened. You can do this with the discard
> keyword in
> >> > your shadow pixel shader.
> >> >
> >> > Jeff
> >> >
> >> > On Tue, Sep 28, 2010 at 9:25 PM, [email protected]
> <mailto:[email protected]>
> >> > <mailto:[email protected] <mailto:[email protected]>>
> <[email protected] <mailto:[email protected]>
> >> > <mailto:[email protected]
> <mailto:[email protected]>>> wrote:
> >> >
> >> > Hi,
> >> >
> >> > I have hooked up planar shadows for my Android Tank game
> using a
> >> > matrix
> >> > to project all geometry onto the ground. The game has the
> luxury of
> >> > having a 2D battle field. The problem is that I am
> using instanced
> >> > rocks that are randomly rotated and pushed into ground.
> So now I
> >> > get a
> >> > reverse shadow projected from underneath. Is there any
> way to get
> >> > rid
> >> > of this?
> >> >
> >> > Leigh
> >> >
> >> >
> >> >
> ------------------------------------------------------------------------------
> >> > Start uncovering the many advantages of virtual appliances
> >> > and start using them to simplify application deployment and
> >> > accelerate your shift to cloud computing.
> >> > http://p.sf.net/sfu/novell-sfdev2dev
> >> > _______________________________________________
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> <mailto:[email protected]>
> >> > <mailto:[email protected]
> <mailto:[email protected]>>
> >> > https://lists.sourceforge.net/lists/listinfo/gdalgorithms-list
> >> > Archives:
> >> >
> >> >
> http://sourceforge.net/mailarchive/forum.php?forum_name=gdalgorithms-list
> >> >
> >> >
> >> >
> >> >
> >> > --
> >> > Jeff Russell
> >> > Engineer, 8monkey Labs
> >> > www.8monkeylabs.com <http://www.8monkeylabs.com>
> <http://www.8monkeylabs.com>
> >> >
> >> >
> >> >
> >> >
> ------------------------------------------------------------------------------
> >> > Start uncovering the many advantages of virtual appliances
> >> > and start using them to simplify application deployment and
> >> > accelerate your shift to cloud computing.
> >> > http://p.sf.net/sfu/novell-sfdev2dev
> >> >
> >> >
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> >>
> >>
> >>
> >>
> ------------------------------------------------------------------------------
> >> Start uncovering the many advantages of virtual appliances
> >> and start using them to simplify application deployment and
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> >
> >
> >
> > --
> > Jeff Russell
> > Engineer, 8monkey Labs
> > www.8monkeylabs.com <http://www.8monkeylabs.com>
> >
> >
> ------------------------------------------------------------------------------
> > Start uncovering the many advantages of virtual appliances
> > and start using them to simplify application deployment and
> > accelerate your shift to cloud computing.
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> >
>
> ------------------------------------------------------------------------------
> Start uncovering the many advantages of virtual appliances
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>
>
> ------------------------------------------------------------------------------
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>
>
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