GPU jobs for generating gas giant textures.

[fluffyfreak]

What is it?

This is some tech' I wrote a while ago that generates the texture map used by the gas giants on the GPU. It's a little rough right now but I hope to improve it as time goes by and to use the GPU jobs for other things.

• Update linux makefiles
• Make work on AMD MESA R600 GPU's

Testing:

The new GPU jobs are enabled by default, they can be deactivated by replacing the line EnableGPUJobs=1 with EnableGPUJobs=0 in the config.ini file.

Then ingame pick the Earth based starting location and once it's loaded you use the F2->F7->Click a Gas Giant->Ctrl+F10 to view one of the giants in the object viewer.

Linux:

As usual the problem is the open source GPU drivers similar to #2176, this is why you can't have nice things :P on AMD Radeon chipsets using the R600 gallium drivers the shader fails to compile.

There is now a workaround in place that uses less noise octaves. This produces less detailed texture maps for the gas/ice giants but they still look good and at least the program runs.

Andy

[impaktor]

I was going to try this, but ended up in libpng 1.2 v.s. libpng 1.6 hell (also on my master), and threw in my towel. Sorry, but I feel I don't have much energy left in me nowadays.

[laarmen]

Oh, I was gonna try and reboot on my Linux partition tonight to update my resume, I'll try this while I'm at it. And for good measure, i'll even try to understand the code (and will probably fail)

[laarmen]

GasGiant.o: In function GasGiant::OnAddGPUGenResult(SystemPath const&, GasGiantJobs::SGPUGenResult*)': /home/laarmen/dev/pioneer/src/GasGiant.cpp:325: undefined reference toGasGiantJobs::SGPUGenResult::OnCancel()'
GasGiant.o: In function GasGiant::GenerateTexture()': /home/laarmen/dev/pioneer/src/GasGiant.cpp:527: undefined reference toGasGiantJobs::STextureFaceRequest::STextureFaceRequest(vector3 const_, SystemPath const&, int, int, Terrain_)'
/home/laarmen/dev/pioneer/src/GasGiant.cpp:562: undefined reference to GasGiantJobs::GenFaceQuad::GenFaceQuad(Graphics::Renderer*, vector2<float> const&, Graphics::RenderState*, unsigned int)' /home/laarmen/dev/pioneer/src/GasGiant.cpp:564: undefined reference toGasGiantJobs::SGPUGenRequest::SGPUGenRequest(SystemPath const&, int, Terrain_, float, GasGiantJobs::GenFaceQuad_, Graphics::Texture_)'
/home/laarmen/dev/pioneer/src/GasGiant.cpp:565: undefined reference to GasGiantJobs::SingleGPUGenJob::SingleGPUGenJob(GasGiantJobs::SGPUGenRequest_)' GasGiant.o: In function GasGiantJobs::SingleTextureFaceJob::SingleTextureFaceJob(GasGiantJobs::STextureFaceRequest*)':
/home/laarmen/dev/pioneer/src/GasGiantJobs.h:140: undefined reference tovtable for GasGiantJobs::SingleTextureFaceJob' graphics/opengl/libgraphicsopengl.a(RendererGL.o): In function Graphics::OGL::GenGasGiantColourMaterial::GenGasGiantColourMaterial()':
/home/laarmen/dev/pioneer/src/graphics/opengl/GenGasGiantColourMaterial.h:54: undefined reference to`vtable for Graphics::OGL::GenGasGiantColourMaterial'
collect2: error: ld returned 1 exit status

Ooooops ;-)

[fluffyfreak]

@laarmen have you got everything? I updated the makefiles and it works on two Linux installations here. Not sure what's different that would stop yours from working.

[walterar]

What is the point of a new feature that is turned off?

1. It looks very ugly on linux 64 - nvidia 650

[impaktor]

1. It looks very ugly on linux 64 - nvidia 650

Maybe a screenshot to demonstrate what isn't working properly?

[walterar]

EnableGPUJobs=0

EnableGPUJobs=1

[nozmajner]

Which one is the problematic? The second one seem to resemble Jupiter a lot more. And I'm not seeing any glitches either.

[fluffyfreak]

Ok the nightmare is that this works when generating the texture, but won't render if you have the eclipse code enabled...

[fluffyfreak]

@laarmen are you still having those builds problems?

[fluffyfreak]

@walterar which one do you mean is ugly? I was trying to make them look more like the real planets.

[impaktor]

Compiles fine.

Asking for a seed twice, with EnableGpujobs=0, (like pressing random seed twice), crashes the game:

pioneer: GasGiant.cpp:531: void GasGiant::GenerateTexture(): Assertion `!m_job[i].HasJob()' failed.
[1]    25657 abort      ./src/pioneer

I assume this is due to the debug just being temporary hack? But seems to work when enabled, although sluggish during first 3-4 seconds.

Merge whenever you're happy.

[fluffyfreak]

I haven't been able to get that assert, how did you do it?

[impaktor]

Well, I had the GPU-jobs disabled (from before) in my config, started pioneer, and did exactly what you suggested in your top post, then looked at the gas giant (I might have rotated it a bit with my mouse? If that is possible?), pressed new seed -> then random seed -> crash.

Second time I tried it, I though asking for random seed caused crash, so did same as above, but instead asked for random seed, which worked first time, but then second time it crashed.

Or that's how I remember it.

[Tichy]

I saw that this doesn't work on R600 (blank untextured plantes) unless I set AMD_MESA_HACKS=1 in config.ini

Should I add an entry to the FAQ about this?

[impaktor]

@Tichy Please do.

[Tichy]

http://pioneerwiki.com/wiki/FAQ#I_see_blank_untextured_Gas_Giants_and_I.27m_using_an_ATI_graphic_card_under_GNU.2FLinux_with_open_source_drivers_.28Mesa_R600.29

With a bit of explaination from fluffyfreak initial post.

[fluffyfreak]

Thanks @Tichy :)

[impaktor]

This adds new source files that cause XCode to stop working.
Ping @salborrelli if still with us.

[salborrelli]

@impaktor yup I'm still with you guys, and following the discussions, even though my job workload is getting out of control 😄 I will pull the latest version and check the Xcode as soon as I can.

[jfacoustic]

Hey I got it working for OSX! I submitted a pull request.