vertex shader textures

hendu · Post by **hendu** » Wed Jul 04, 2012 9:55 pm

Probably not in irr, since I get pink?

Nadro · Post by **Nadro** » Wed Jul 04, 2012 11:11 pm

Which version of Irrlicht do You use? Some time ago (~3-4 months) we had a bug with mipmaps in OpenGL but it's already fixed.

Bl00drav3n · Post by **Bl00drav3n** » Thu Jul 05, 2012 12:38 am

I am using the latest trunk version right now. I will write an OpenGL example and test it again.

Nadro · Post by **Nadro** » Thu Jul 05, 2012 1:17 am

So it looks like a driver bug because I also see a pink quad (Radeon HD3870 + Catalyst 12.4).

Bl00drav3n · Post by **Bl00drav3n** » Thu Jul 05, 2012 2:54 am

Yes I tested it, there is a bug with glGenerateMipmap(), it seems that it doesn't like 1px textures. In Irrlicht this method only gets called until the EVDF_FRAMEBUFFER_OBJECT and EVDF_MIP_MAP_AUTO_UPDATE features are available and GL_SGIS_generate_mipmap was defined (last one was of course defined in glext.h). Otherwise it will fall back to either calling glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE) or doesn't use mipmaps at all.
Interestingly enough with GL_TEXTURE_MIN_FILTER set to GL_LINEAR_MIPMAP_NEAREST, the 1px texture will be used at all mipmap levels, while a 2x2 px texture will cause the driver to disable texturing. Very strange *lol*

If somebody wants to test this: glGenerateMipmap has been core since OGL3.0 but on Windows I had to use the latest glew lib (1.7.0), the old version had a bug where the compiler didn't find the reference to that function. I am using Catalyst 12.6.

hendu · Post by **hendu** » Thu Jul 05, 2012 9:48 am

I'm using 1.7 branch + various changes, FWIW.

Anyway, if you have a small GL-only example that reproduces it, please post it to AMD's bugzilla.

Bl00drav3n · Post by **Bl00drav3n** » Thu Jul 05, 2012 12:53 pm

I just filed a bug report.

Granyte · Post by **Granyte** » Sun Jul 08, 2012 2:54 am

http://msdn.microsoft.com/en-us/library ... p/bb206339

I found this about how vertex texture works in dx9 but i don't see how that is usefull to integrate them into irrlicht

mongoose7 · Post by **mongoose7** » Sun Jul 08, 2012 10:43 am

Could you fix the link? Just hover on it an you will see what I mean.

fmx · Post by **fmx** » Sun Jul 08, 2012 10:57 am

remove the (v=vs.85) and you're good
here's the link: http://msdn.microsoft.com/en-us/library ... p/bb206339

hybrid · Post by **hybrid** » Sun Jul 08, 2012 7:40 pm

Looks like we only need to have a proper texture bind, which should usually be automatically. Maybe you just need the correct texture sample call?!

Granyte · Post by **Granyte** » Tue Jul 10, 2012 8:32 am

Vertex texture are indeed working in DX9 the issue was not irrlicht but the way vertex texture are handeled in DX9

http://robertwrose.com/2005/05/vertex-t ... notes.html

hendu · Post by **hendu** » Tue Jul 10, 2012 10:28 am

Yikes, weird and limited. Just compare to how easy it was in opengl

Granyte · Post by **Granyte** » Tue Jul 10, 2012 4:30 pm

that's why i'm tryng to port a dx11 driver to the svn

dx9 is way outdated

Edit finaly NOP vertex texture fetch is not working even if the code compile it seem no texture is assigned to the register

Granyte · Post by **Granyte** » Sun Jul 15, 2012 2:23 am

Damnit 4 days later and i still can't find the place where the texture a are binded to thier register in the current dx9 driver

The vertex texture register are diferent then the pixel ones and need to be assigned separatly but i can't even find where they are originaly assigned to pixel shader

Irrlicht Engine

vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures

Re: vertex shader textures