Re: convolve, glConvolutionFilter2DEXT and IR

New Message Reply Date view Thread view Subject view Author view

Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Sat, 18 Jan 1997 17:35:08 +0000

On Jan 17, 5:18pm, Olivier Schreiber wrote:
> Subject: convolve, glConvolutionFilter2DEXT and IR
> I have this simple minded example thanks to Nicolas Gauvin
> for using convolve in IRIS GL with performer 2.*
> It works fine on an RE2 but does not produce any effect on IR.
> The man page for convolve does not specifically say whether
> gl convolve is supported on IR.
>
> Additionally, I am trying to convert it to OPEN GL.
> The man page says results are unreliable.
>
> Any suggestion appreciated.
> Thanks.
>

Using OpenGL you need to enable the convolution during pixel transfer:

glEnable(GL_CONVOLUTION_2D_EXT);

Adding this to your code will fix the OpenGL.

I expect your IrisGL problems are due to bugs in IGLOO, you might
want to try the IGLOO patch 1422 and also make sure you have the iR
gfx patch 1355.

Cheers,
Angus.
=======================================================================
List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/
            Submissions: info-performer++at++sgi.com
        Admin. requests: info-performer-request++at++sgi.com

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:54:22 PDT

This message has been cleansed for anti-spam protection. Replace '++at++' in any mail addresses with the '@' symbol.