Re: Shadow and projected texture

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Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Wed, 22 Jan 1997 12:26:02 +0000


On Jan 22, 1:04pm, login IRIX wrote:
> Subject: Re: Shadow and projected texture
> Angus,
>
> You say in your last mail about shadows that:
>
> - if I would like to have shadows in my perfomer 2.1 application
> compiled in OpenGL, I need patch 1355 and must hand code the openGL shadows
> multi-pass: have you got some sample code about that?

No I don't, there only code I've seen to do this is the IrisGL code by
John Rholf in 4DGifts. You should be able to obtain some sample OpenGL
code though.

>
> - if I would like to have shadows in my perfomer 2.1 by using
> PFLS_SHADOW_ENABLE and PFTRAV_MULTIPASS, the only way today is to compile in
> IrisGL... but another question: how could I make this compilation : I try
with
> igldso or iglopt, but errors occured during execution like
> -> 6019:./perfly: rld: Error: unresolvable symbol in ./perfly: GLOBALBorder
> -> 6019:./perfly: rld: Fatal Error: this executable has unresolvable symbols
> Could you tell me why?

You either aren't linking a library you need or the code is making calls
to unsupported functions, not necessarily your code, possibly something
in a performer dso. Did you really get the code to compile with iglopt?

Again, make sure you have patch 1422 for the IrisGL.

> And what is the frame speed in IrisGL on a Infinite Reality? OpenGL should be
> faster, shouldn't it?

OpenGL is much faster than IrisGL on iR, I think IrisGL will give you
RE2-ish performance.

Cheers,
Angus.
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