Fading Blackscreen

[Darki]

I want to make a Blackscreen thats starts fading in when you have only 3 air when you are under water and when you have 0 air and starts drowning that the blackscreen is full faded in. And when you come over water when its starts fading in that the blackscreen instantly fading out. I hope you understand this. An Example is Subnautica, when you have not enough air. The screen will darker

[Draco18s]

Look at how the blindness potion works.

 

You'll need to subscribe to the FogDensity event and do some manipulation to it/the GL state.

[Izzy Axel]

Receive the RenderGameOverlayEvent.Pre, and use Minecraft.getMinecraft().thePlayer#getAir() to check the player's air value.  If it's below a certain amount, draw a quad over the screen using the resolution stored in the event, turn GL blending on, and use glColor4f(0f, 0f, 0f, x), where x is an equation that increments upwards over time, preferably using partial ticks, to fade the black box in.  At least, that's how I'd try it first.

[TheMasterGabriel]

I want to make a Blackscreen thats starts fading in when you have only 3 air when you are under water and when you have 0 air and starts drowning that the blackscreen is full faded in. And when you come over water when its starts fading in that the blackscreen instantly fading out. I hope you understand this. An Example is Subnautica, when you have not enough air. The screen will darker

 

Receive the RenderGameOverlayEvent.Pre, and use Minecraft.getMinecraft().thePlayer#getAir() to check the player's air value.  If it's below a certain amount, draw a quad over the screen using the resolution stored in the event, turn GL blending on, and use glColor4f(0f, 0f, 0f, x), where x is an equation that increments upwards over time, preferably using partial ticks, to fade the black box in.  At least, that's how I'd try it first.

 

You can also check out GuiIngameForge#renderSleepFade to see how the sleeping fade works if you want a reference point.

[Draco18s]

(From a purely aesthetical point of view, the fog will probably look better, as it will lower the maximum view distance as well as make things darker, rather than a 2D flat overlay, giving the effect of tunnel vision).

[Izzy Axel]

Yeah, though iirc Subnautica does just use a screen fade, and it doesn't look great there either lol