Hi Robert and Guy.
Thanks for your valuable advices. I will implement these and come back to
you.
Regards
Harash
----- Original Message ----
From: Robert Osfield <[EMAIL PROTECTED]>
To: OpenSceneGraph Users <[email protected]>
Sent: Monday, February 25, 2008 9:02:47 PM
Subject: Re: [osg-users] Finding Normals at all pixel positions
Hi Harash,
Render you scene to a depth texture and then compute the normals from
this in a second pass in the shader.
Robert.
On Mon, Feb 25, 2008 at 3:20 PM, Harash Sharma <[EMAIL PROTECTED]> wrote:
>
>
>
> Hi All,
>
>
>
> In my OSG application, I want to find the normal vector corresponding to
> each pixel position. It means that after rendering if an image pixel (i,j)
> comes from an object plane P, I need to find the Normal vector to P. One of
> the ways would be to use LineSegmentIntersector to find the intersecting
> plane for pixel (i,j), given the Line of Sight. But doing this for all
> pixels in the field of view would be a very slow process.
>
>
>
> It would be very kind if anyone could tell if a faster mechanism to do
> this is there in OSG and give a pointer to it. Thanks in advance.
>
>
>
> Regards
>
>
>
> Harash.
>
>
>
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