OpenGL 3 port
Hello Carsten,
I wanted to learn OpenGL 3 and thought of trying to implement it into Cafu. Don't expect anything, it's more like me learning how to use OpenGL, but I wanted to ask if you already started implementing it so I don't rewrite existing code.
sycoso
I wanted to learn OpenGL 3 and thought of trying to implement it into Cafu. Don't expect anything, it's more like me learning how to use OpenGL, but I wanted to ask if you already started implementing it so I don't rewrite existing code.
sycoso
Re: OpenGL 3 port
Hi sycoso,
Previous attempts unfortunately never produced any practically significant code.
A related ticket is http://trac.cafu.de/ticket/17
A related thread is http://www.cafu.de/forum/viewtopic.php?f=8&t=933
(Unfortunately, Thomas never sent me the last state of his code.)
Great to hear this!sycoso wrote:I wanted to learn OpenGL 3 and thought of trying to implement it into Cafu. Don't expect anything, it's more like me learning how to use OpenGL, but I wanted to ask if you already started implementing it so I don't rewrite existing code.
Previous attempts unfortunately never produced any practically significant code.
A related ticket is http://trac.cafu.de/ticket/17
A related thread is http://www.cafu.de/forum/viewtopic.php?f=8&t=933
(Unfortunately, Thomas never sent me the last state of his code.)
Best regards,
Carsten
Carsten
Re: OpenGL 3 port
Thomas has stopped working on OpenGL 3 for Cafu(Cafu needs some reworking for it, handling geometry), he's currently researching new rendering methods, getting OpenGL and OpenCL to do realtime raytracing and raster mixed together.
If successful he'll have sample code for Cafu which you can integrate, if not, well, his voxel raytracer is progressing well and it'll be a portable lib.
I think he still has his simple implementation of OGL3 sitting around, it doesn't have any big advantages(since Cafu needs some reworking for OGL3+), incomplete.
I'm actually working with Go golang.org now, using Cafu and your paper and some other papers as educational material for making a partial engine like Cafu using Gocos gocos2d.org(site not up, still internal alpha only) as the kit.
I'm no good at networking and prediction though... one day I may try merging Cafu with a Go project, dumping Lua, replacing renderer with OGL3(Gocos), GUI system would be using Gocos2D.
So a cleaned up stripped Cafu with Go instead of Lua.
If successful he'll have sample code for Cafu which you can integrate, if not, well, his voxel raytracer is progressing well and it'll be a portable lib.
I think he still has his simple implementation of OGL3 sitting around, it doesn't have any big advantages(since Cafu needs some reworking for OGL3+), incomplete.
I'm actually working with Go golang.org now, using Cafu and your paper and some other papers as educational material for making a partial engine like Cafu using Gocos gocos2d.org(site not up, still internal alpha only) as the kit.
I'm no good at networking and prediction though... one day I may try merging Cafu with a Go project, dumping Lua, replacing renderer with OGL3(Gocos), GUI system would be using Gocos2D.
So a cleaned up stripped Cafu with Go instead of Lua.
Re: OpenGL 3 port
Regarding voxel raytracing, is this something like in http://s08.idav.ucdavis.edu/olick-curre ... -games.pdf, starting on page 97?
Best regards,
Carsten
Carsten
Re: OpenGL 3 port
Well when it comes to using an octree for optimization, yes, but beyond that it's rather conventional raytracing(highly optimized) for lighting only and raster to draw the lit scene.
Instead of a regular raytracer which casts from the screen and looks for lights(and of there's something in the way if there's a shadow), the lights cast rays which hit the geometry to light it.
A stationary light and stationary geometry uses no CPU power, if the light is in motion you gotta update all of it's rays, but, if there's an object moving you only have to update the rays being cast towards the thing.
Ambient light is in the octree, areas full of rays brighter than places with few.
Haven't done bounce lighting yet.
This actually works in realtime on a modern $50 graphics card.
Instead of a regular raytracer which casts from the screen and looks for lights(and of there's something in the way if there's a shadow), the lights cast rays which hit the geometry to light it.
A stationary light and stationary geometry uses no CPU power, if the light is in motion you gotta update all of it's rays, but, if there's an object moving you only have to update the rays being cast towards the thing.
Ambient light is in the octree, areas full of rays brighter than places with few.
Haven't done bounce lighting yet.
This actually works in realtime on a modern $50 graphics card.
Re: OpenGL 3 port
Hi,
So I did find the time to read the thread. *yay*
Carsten, may I ask how far you got with implementing UnivMeshT?
So I did find the time to read the thread. *yay*
Carsten, may I ask how far you got with implementing UnivMeshT?
Re: OpenGL 3 port
Unfortunately, in the light of more pressing concerns at that time, I never completed a working instance of it.sycoso wrote:So I did find the time to read the thread. *yay*
Carsten, may I ask how far you got with implementing UnivMeshT?
Nevertheless, as mentioned in the former thread, I still think that this can be implemented in small steps, that are each easy to write and easy to review.
No huge, global one-time effort should be required before work can start on an OpenGL 3 renderer, because it should be possible to introduce the new
UnivMeshT
in parallel to the old code, and to try it out in a small, chosen area of the code, e.g. in the Model Viewer (or elsewhere).I have re-read most, but honestly not all of the old thread. In any case, don't let that stop you -- I'll be happy to help on any question you have and in any way that I can.
![Thumb Up :up:](./images/smilies/thumbup.gif)
Best regards,
Carsten
Carsten
Re: OpenGL 3 port
Okay, good to know, I'll see what I can do ![Wink ;-)](./images/smilies/icon_wink.gif)
And awesome how helpful you always are![Thumb Up :up:](./images/smilies/thumbup.gif)
![Wink ;-)](./images/smilies/icon_wink.gif)
And awesome how helpful you always are
![Thumb Up :up:](./images/smilies/thumbup.gif)
Last edited by sycoso on 2012-10-12, 22:22, edited 1 time in total.
Re: OpenGL 3 port
Where do I find the Model Viewer? Sorry, but I just can't find it...
Re: OpenGL 3 port
The Model Viewer is a part of CaWE. Start the CaWE program, then follow the instructions at http://www.cafu.de/wiki/modeleditor:int ... del_editor
For developing or testing OpenGL 3 code, note that I mentioned the Model Editor just as an example -- other program parts may be suitable as well.![Thumb Up :up:](./images/smilies/thumbup.gif)
For developing or testing OpenGL 3 code, note that I mentioned the Model Editor just as an example -- other program parts may be suitable as well.
![Thumb Up :up:](./images/smilies/thumbup.gif)
Best regards,
Carsten
Carsten
Re: OpenGL 3 port
Sorry for not keeping you updated, but since I have a full-time job atm I just can't find the time to get into the project. So no port from me, sorry.
Re: OpenGL 3 port
I'm sorry to hear that, but congrats to your job of course and still thanks for the explicit update!sycoso wrote:Sorry for not keeping you updated, but since I have a full-time job atm I just can't find the time to get into the project. So no port from me, sorry.
![Cheesy Grin :cheesy:](./images/smilies/icon_cheesygrin.gif)
I'm currently working a couple of hours every day on the new Component Systems as detailed in other threads, and hope to get back to newer renderers as soon as that's done. And of course, I'd be very happy if you joined in again at a later, more convenient time!
![Thumb Up :up:](./images/smilies/thumbup.gif)
Best regards,
Carsten
Carsten
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