next »

[Oliver]

Hi,

does anyone have an idea, how to "disrupt" a render output?

The task is to simulate a slightly disrupted video signal.

a) by adding noise
b) simulate digital zoom (pixelate)

any help is appreciated!

Cheers,
Oliver

[Marvin Fröhlich]

I don't know, how to add noise (maybe just a few random half transparent grayish pixels mixed over the image). But making lower quality can be done by simply resizing the image to a smaller size and then resizing it back to its original size.

Marvin

[shatterblast]

GIMP is suppose to have filters for simulating "television static" and even the odd light and dark lines seen on older monitors.  I believe the most recent "Front Mission 4" series from Squaresoft (Square Enix) uses a filter over the rendered result for this effect.  If you don't mind putting a little effort into it, you could possibly create two filters.  One could be for random simulated static with an opaque background for your game.  The other filter could maybe have a very slow-moving from up to down mix of opaque and "light grey" bars.  You might even throw in a "star burst" effect of the simulated monitor "turning on" while the filters come to effect, but I'm not sure what you might be looking for.  Just saying that adding a little white and grey translucent randomness on a 2D surface shouldn't interfere badly with your 3D renderings.  I prefer the PNG format for graphics editing personally.

[Gunslinger]

How about changing the FOV randomly with every frame?
In some update method:

Code:

env.getView().setFieldOfView(FastMath.randomFloat(0.5f,0.7f));

It's simple and it will make the screen "flicker" very irregular.

[Oliver]

Thanks for your suggestions.

I played a while with it. It is everything but easy, to simulate disturbances in real time (>=60 fps)

Marvin, is there a fast way to to scale the render result two times in realtime before output?

Oliver

[Marvin Fröhlich]

Marvin, is there a fast way to to scale the render result two times in realtime before output?

Yes. You can do this by adjusting the field-of-view or the view-zoom. But zooming it by 2 or multiplying the FOV by 2 will not zoom the render result by 2. Just find the correct value.

Marvin