"OGRE DirectX 10 render system" preview

[helloween]

I have same troubles with an xna renderer, some demos are working on some cards, and some others on other cards, even with the simplest shader.
I would like someone to explain me how this is possible, how games can handle many different cards without bug, they write specific shaders 10 times for 10 cards ?

[Assaf Raman]

@gugus – if you want to use the same shaders in your game for DX9, GL, and DX10 you will have to build shaders that compiles both as hlsl and as cg and have different materials and a code switch to select the material according to the render system, cg and hlsl are almost the same. This is a problem indeed.

@helloween – xna uses DX9 to render as far as I know – so I guess this is not the right thread for discussing this problem, also – OGRE doesn’t have an xna render system yet.

[gugus]

Ok.Thanks!

[helloween]

@gugus – if you want to use the same shaders in your game for DX9, GL, and DX10 you will have to build shaders that compiles both as hlsl and as cg and have different materials and a code switch to select the material according to the render system, cg and hlsl are almost the same. This is a problem indeed.

@helloween – xna uses DX9 to render as far as I know – so I guess this is not the right thread for discussing this problem, also – OGRE doesn’t have an xna render system yet.

yeap, its based on directx9 but all fixed function have been removed (from world/view/projection matrices to texturing ect...) and you are obliged to draw with an effect on.
I thought I could have some help on understanding why the same code works so differently on different cards with a very basic shader effect.

[Assaf Raman]

Can you post a sample of this with code and screenshots from 2 cards?

[ahmedismaiel]

i don't think this is a driver bug ,i have all nvidia directx10 samples & all DX10 games working ,i would say it's an initialization problem to the vertex buffer that is bound

perhaps you can post a debug version of the application so i can try it out?

[Assaf Raman]

perhaps you can post a debug version of the application so i can try it out?

Sure, download the render system from here: Latest code here: Direct3D10_pre9.zip

Add it to the "ogrenew\RenderSystems" dir and to the Ogre_vc8.sln solution.

then change the Plugins.cfg file to use this render system.
add this line to the debug plugins.cfg file:

Code: Select all

Plugin=RenderSystem_Direct3D10_d

and this line to the release plugins.cfg file:

Code: Select all

Plugin=RenderSystem_Direct3D10

Then just run your normal Demo_ParticleFX.exe demo.

I don’t think this is a vertex problem but a texture load problem.

I will be really happy if you compile my render system, run it on your computer and suggest fixes.

EDIT - also remove this line from the debug plugins.cfg file

Code: Select all

Plugin=Plugin_CgProgramManager_d

and this from the release:

Code: Select all

Plugin=Plugin_CgProgramManager

No cg in dx 10...

[helloween]

Can you post a sample of this with code and screenshots from 2 cards?

I was using a shader from a xna tutorial here http://creators.xna.com/Headlines/devel ... ample.aspx

on a 8500 GT and some other nvidia cards the result was like this :
http://img180.imageshack.us/img180/3188/terraincg3.jpg

and on my ati 1600 like that :
http://img87.imageshack.us/img87/8603/terrain2wb7.jpg


I finally tried the most simple shader and it is working better on different card.

But still, how are you managing the different kind of textures, for example if you have to draw the envmap of the Ogre ear ring ?
and what about the texture coordinates ?
Will you render system be open source ?

Thanks

[Assaf Raman]

how are you managing the different kind of textures, for example if you have to draw the envmap of the Ogre ear ring ? and what about the texture coordinates ?

I guess I will deal with it in the fixedFuncEmu. For now – I guess you will need to write a shader for it.

Will you render system be open source ?

I released the code here in the forum and it has the same license as OGRE (LGPL or pay Sinbad's company for static link). I guess in the end I will post a patch to OGRE of the whole render system or Sinbad will take what he needs from my code and build his own dx10 render system.

[sinbad]

We'll do some kind of merging effort at some point down the line, we did this years ago when we first supported Dx9 in fact. In fact, if you're able to merge the code I'd already done into your version I could give you access to HEAD to develop on. The cvsmail archives have the details of what I've done already, but it was mostly:

- D3D10_SHADER_ENABLE_BACKWARDS_COMPATIBILITY
- texel / pixel mapping same as GL now
- hardware vertex / index buffer refinements & scratch resource behaviour

[Assaf Raman]

OK, I will do the merge on the weekend and we will see what next after that.

[Assaf Raman]

I downloaded HEAD cvs and got everything to compile.
I need to think of the best way to do the merge.
I will try to copy from my code and paste in yours if I can.
I will post here when I am done.

[Assaf Raman]

I didn't finish it this weekend. I will try to finish the merge by next week.

[33 Minutes]

That's looking promising, but some ridiculously small amount of people are configured for DX10 (Something like 5% last time I checked) But don't stop, Keep going!

[deficite]

That number will grow exponentially once the tipping point gets reached (when the DX10 midrange cards stop sucking). We're almost there too; the 8800GT and the ATi 3xxx cards are pretty good, and they're <= $200. The 3xxx cards are even 10.1 (as well as the 9xxx cards, which are only 16 days away ATM)

I also agree; keep going! I don't have a DX10 card yet, but you better bet I'll be messing around with it once I do get one. It'll be all the better if my favorite graphics engine supported it

[Assaf Raman]

Here are some new screenshots to give you the feel of the current state of this project:

[CaseyB]

It's looking really good man! Great work!

[Assaf Raman]

I also got the render to texture partially working.

[juedno]

so cool!!

[deficite]

I assume those framerates are low due to something else running (such as FRAPS, etc.)? If not, what specs does your system have?

[Assaf Raman]

The demos are running in release and I have a dell xps 1330 with GeForce 8400M GS. nothing else is running.
The fps of dx9 and dx10 are almost the same for the demos - so the fps is not bad for the dx10.

[deficite]

Ok, the 8400 explains it. That's why I was asking. I was just making sure you weren't getting 18FPS on an 8800GTX or something

Keep up the good work

[Beefygoblin]

Just adapting for dx10 now is pointless (and it didn't realy deliver much anyway). Two words Larrabee and GT300. Yep,screwed. Going to have to completly throw out half of whats been achieved and go in the opposite dirrection.

It will be fun though.

[Azgur]

Just adapting for dx10 now is pointless (and it didn't realy deliver much anyway). Two words Larrabee and GT300. Yep,screwed. Going to have to completly throw out half of whats been achieved and go in the opposite dirrection.

It will be fun though.

Flamebait?
Complete nonsense eitherway.

[AshMcConnell]

nice of him to go to the trouble of registering for that