Re: [osg-users] OSG to OptiX integration from 2012

[Chris Hanson]

Interesting! Thanks!

I'm trying to picture how it would all fit together.

On Sat, Aug 10, 2019 at 3:14 PM Uwe Woessner  wrote:

> Hi Chris,
>
> if you are looking for raytracing osg scenes in general and not OptiX
> specifically, you could also have a look at
> https://github.com/szellmann/visionaray
> There is a visionaray plugin for OpenCOVER which is our OpenSceneGraph
> based renderer. You find it here: https://github.com/hlrs-vis/covise
>
> Regards,
>  Uwe
> Am 03.08.2019 um 12:09 schrieb Raymond de Vries:
>
> Hi Chris,
>
> I am looking through old mail and saw your questions. I have seen the code
> and as far as I can remember it was not used for rendering. It was not open
> source.
>
> Send me a PM for more details if you like.
>
> Cheers
> Raymond
>
>
> On 7/12/2019 9:09 AM, Chris Hanson wrote:
>
>
> While looking into using Nvidia RTX ray tracing of an OSG scene, I came
> across this document from 2012:
>
> http://on-demand.gputechconf.com/gtc/2012/presentations/S0319-Advanced-Driver-Assistance-System-Testing-Using-OptiX.pdf
>
>
> It discusses using a plugin to convert an OSG scene to an OptiX scene,
> which is then rendered in OptiX.
>
> Has anyone ever seen or used this code? Was it open source? It may be
> dated, but it would be a starting point for new work.
>
> With AMD getting into the ray tracing game, it would be nice to have a way
> to portably ray trace scenes on either NVidia or AMD (or Intel) GPUs, but I
> don't see anything stepping into that space yet. I saw the beginning of a
> Vulkan ray tracing library:
> https://www.phoronix.com/scan.php?page=news_item&px=vRt-Vulkan-Ray-Tracing
>
>
>
>
>
> --
> Chris 'Xenon' Hanson, omo sanza lettere. xe...@alphapixel.com
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-- 
Chris 'Xenon' Hanson, omo sanza lettere. xe...@alphapixel.com
http://www.alphapixel.com/
Training • Consulting • Contracting
3D • Scene Graphs (Open Scene Graph/OSG) • OpenGL 2 • OpenGL 3 • OpenGL 4 •
GLSL • OpenGL ES 1 • OpenGL ES 2 • OpenCL
Legal/IP • Forensics • Imaging • UAVs • GIS • GPS •
osgEarth • Terrain • Telemetry • Cryptography • LIDAR • Embedded • Mobile •
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@alphapixel  facebook.com/alphapixel (775)
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Re: [osg-users] Fixed pipeline lighting to shaders

[Chris Djali]

Hi,

ShaderGen from 3D Labs is an old tool that can generate equivalent GLSL 1.2 
shaders for a fairly large subset of FFP state. I've used it a fair amount to 
sanity-check things. If you just want a basic shader as a start point to drop 
into an FFP application, it's pretty good, but there are definitely things it 
doesn't cover.

Cheers,
Chris

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Re: [osg-users] Shininess without Material

[Chris Djali]

Hi,

Fixed-function materials can track either the material colour or the vertex 
colour depending on if glColorMaterial is used, so you can probably get the 
behaviour you want by setting a material on the stateset as before, but 
changing its mode so that (for example) the diffuse and ambient colours track 
the vertex colour.

Cheers,
Chris

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