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Thank you I will look into that.
On 9/29/2010 5:09 PM, Jeff Russell 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
> >
> >
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> >
> >
> > --
> > 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
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> >
> >
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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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>
>
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