REQ: Ambient Occlusion

[Falcrum]

Im not sure if its possible to make real-time ambient occlusion for Spring, but this is amazing...



http://www.ozone3d.net/tutorials/ambient_occlusion.php
http://www.ozone3d.net/demos_projects/s ... lusion.php

In game AO:
http://pl.youtube.com/watch?v=xsU_5bP8eGg

Other links:
http://pl.youtube.com/watch?v=eefsv8tQm ... re=related (check discription)
http://www.ogre3d.org/phpBB2/viewtopic. ... sc&start=0
http://www.gamedev.ru/code/forum?id=78742

[Warlord Zsinj]

I don't think you'll find many (if any) FPS's that use ambient occlusion, let alone modern, professional RTS's.

[Falcrum]

Unreal 3 Engine
CryEngine 2
Leadwerks Engine

S.T.A.L.K.E.R.: Clear Sky
Gears of War 2
Toribash
Crysis

http://video.google.com/videoplay?docid ... 0709&hl=en

[lurker]

Yes, let's pull a Crysis on every unit.

[Argh]

Uh... just looking at what was done there, it looks like a technique that would be great for a FPS- say, the inside of a room- where you have a space and light sources that are static.

It'd be absolutely useless for outdoors scenes or anything that's animated, though. You'd just have to fake it with the usual tricks. If you want this effect on your model skins... Blender can bake AO render passes. Personally, I think it's a total waste of time for RTS geometry, where you generally need stronger contrasts than you can get with AO, but whatever.

[Warlord Zsinj]

You missed my point, which was that such a thing is massive overkill for an RTS. Saying that Crysis has such lighting does not mean that Spring, which doesn't even (beyond experimental levels) have bump-mapping/normal mapping and other systems that do have a significant impact on visuals, and are found in most modern RTS engines.

[jK]

[REVENGE]

[TheFatController]

Paper mache spring!

[Falcrum]

Can I see your code jk?

[KDR_11k]

Ambient occlusion is faked with tricks, I don't think any game uses AO like e.g. Blender calculates it except for baked textures.

[Falcrum]

http://pl.youtube.com/watch?v=hqCVFZq2LCg 2:20min. In FPS games its realy nice effect. Why not on RTS game ? Just try... SPring is open project.

[jK]

Can I see your code jk?

http://home.arcor.de/jkei/gfx_ssao.lua
it is everything else than finished

[Falcrum]

Wow... Realy nice :) Thx jK

[Falcrum]

http://pl.youtube.com/watch?v=exuSngXzpJA
Not realy good presentation SSAO because low quality video
SSAO OFF
http://img393.imageshack.us/my.php?imag ... 009ko6.jpg
SSAO ON
http://img361.imageshack.us/my.php?imag ... 008hu6.jpg

[Warlord Zsinj]

What are the results from performance testing?

It does look better, but the difference is small enough that it would not be worth it if the performance loss is too high.

Also consider that most of the units there are still using the primitive 3do unit format, that do not use modern texturing methods. Most decently made s3o units have occlusion baked into their textures, so the difference would be considerably less.

[Falcrum]

FPS for me still same. No changes of performance :) Test yourself

[AF]

You can get higher quality if you switch from youtube to vimeo

[Quanto042]

that is sooooo sexy, i just wish my gaming pc hadn't died. I WANT!

[Hacked]

tried it, but i get this error when lua loads

[ 0] SSAO: Fragment shader failed to compile with the following errors:
ERROR: 0:8: '=' : assigning non-constant to 'const float'
ERROR: 0:9: '=' : assigning non-constant to 'const float'
ERROR: compilation errors. No code generated.