Adding redout and blackout

[Johan G]

Split off from the topic Shader requests.

I extend MIG29pilot request and make it more generic with:

Real time cubemaps for, also, plane reflections.

Also: I want to improove (if i can) the blackout effect but... Where it's defined? i can't find it.

[Johan G]

I want to improove (if i can) the blackout effect but... Where it's defined? i can't find it.

I just added Howto:Add blackout and redout settings to the wiki for you.

[OSuKaRuXD]

I want to improove (if i can) the blackout effect but... Where it's defined? i can't find it.

I just added Howto:Add blackout and redout settings to the wiki for you.

It's not what i meant, but i apreciate it.

[Johan G]

It's not what i meant, but i apreciate it.

Aha. I should probably have figured that out by looking at the name of the topic.

By the way, what did you mean?

[OSuKaRuXD]

Aha. I should probably have figured that out by looking at the name of the topic.

By the way, what did you mean?

I meant the shader itself. I though it was on the Effects or Shaders directory, but, mabe is this REDOUT.NAS in the Nasal directory.

[Johan G]

Took a long look and managed to find where it lives. It is actually not a shader, but is partially hard coded in files related the scenery rendering, see the latest changes in the article.

[Thorsten]

Hm, does it actually work with shaders at all? I realize I never tried of late...

[Johan G]

I think this effect can be improved, for example by adding vignetting and gray out. Also the associated headshake effect (in redout.nas) does not seem to be be possible to tweak by an aircraft developer.

Edit: Also redout and blackout is currently not affected by the amount of time the pilot have been exposed to the g-force.

[OSuKaRuXD]

Vignetting, Desaturation, contrast and noise. Yes. That was my idea
Also, if it was possible, affecting the sound also. (fading out high frequencies and adding a high frequency backgroud tone)
A more physiological accurate effect, in resume.

[Johan G]

Not to mention fading the HUD.

[simbambim]

Do you want us to become sick at the computer?

[Johan G]

With enough of turbulence and headshake, preferably in an aircraft with metal bending sounds during heavy loads...

[Johan G]

Hm, does it actually work with shaders at all?

To a laymen it looks like flightgear/src/Scenery/redout.cxx is an OpenGL hack:

Code: Select all

osg::Node* FGCreateRedoutNode()
{
  // ...
  osg::StateSet* stateSet = geometry->getOrCreateStateSet();
  stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
  stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
  stateSet->setAttribute(new osg::BlendFunc);
  stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
  stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
  stateSet->setAttribute(new osg::Depth(osg::Depth::ALWAYS, 0, 1, false));
  stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
  // ...
};


[OSuKaRuXD]

With enough of turbulence and headshake, preferably in an aircraft with metal bending sounds during heavy loads...

Yeaaahhh!! Pure adrenaline!! xD

[tigert]

Do you want us to become sick at the computer?

Not necessarily sick - but the biggest thing missing from desktop simulators is the feeling of the g-force. It is very easy to pull crazy G-forces because all it takes is a simple push or pull on the joystick.

Maybe the awareness of G-force is something that *might* be possible to enhance throuhg "secondary" senses - like the effects on hearing, or vision, which can be simulated on the computer, while actual physical motion is much harder.

Jet fighters also have the "G-pants" which basically inflate with air when you pull high positive G's - to keep your blood out of your feet and in your head, so you don't faint so easily. This could be something you *could* do for a simulator, but it would also require special hardware. But I think the brain might be able to adapt to the understanding that pressure on your legs means higher positive G.

Vision and hearing, *might* also be used to enhance the feeling of g-force so you sense how the aircraft is moving, even though you don't sense it as motion. And that wouldnt require special hardware. It would indeed be interesting to try how adding a "hum" or whine sound that increases as you pull G's would complement the red/blackout effect.

Also, would those things work, if they were "supersensitive" even to low g-forces? A bit like the the head tracker devices that enable you to look all around the scene by moving your head a lot less to the sides (because you still need to see the screen!) - those are over-sensitive, but the brain adapts to the setup very quickly.

Maybe our brain could do something similar with exxagerated g-force cues through hearing and vision? Might there be some other ways to do this? Maybe a low bass rumble that could be felt though a subwoofer? This stuff might be interesting to play with and maybe it could work out!

//T