[UT2004] how bright is the place I am?

[punk129]

hey guys,
is there any chance to get the brightness of the player's position?

want my bots only see the player, if it's bright enough there.

 

[Postal]

hey guys,
is there any chance to get the brightness of the player's position?

want my bots only see the player, if it's bright enough there.

Back in 2k3 I had a weapon that used light to reload. Heres the code I used, kinda laggy though.

Function Float FindLight()
{
	Local Actor L;
	Local Float Lx,Ly,Lz,D,LB,F;
	Local Vector Loc;

	Loc=Owner.Location;
	Foreach VisibleActors(Class'Actor',L,/*optional float Radius*/,Loc)
	{
		If(L.LightType!=LT_None)
		{
			Lx=(L.Location.x-Loc.x);
			Ly=(L.Location.y-Loc.y);
			Lz=(L.Location.z-Loc.z);
			D=Lx+Ly+Lz;	
			LB=L.LightBrightness*L.LightRadius;
			F=LB/D;
			If(F>1) F=1;
			If(F<0) F=0;
		}
	}
	Return (F);
}

 

[Wormbo]

You could probably optimize that by replacing the VisibleActors() if () part with this:

foreach RadiusActors(Class'Actor', L, Radius,Loc)
  if ( L.LightType != LT_None && FastTrace(Loc, L.Location) ) {
    // remaining code here
  }

This way it only traces actual light sources, which should be much faster than tracing all actors first and then check the visible actors for their LightType.

 

[Mr Evi1]

Won't both of those methods miss out on sunlight actors, assuming the usual practice of putting them in the skybox?

 

[Wormbo]

Yes, but how are you going to check whether an actor in the skybox can be seen from somewhere inside the regular map area?

 

[dataangel]

I just have to say the idea of a solar power weapon is badass.

 

[Hazard.ep]

Yes, but how are you going to check whether an actor in the skybox can be seen from somewhere inside the regular map area?

I just had an idea about the Sunlightactors. It works! Like this for example:

exec function CheckForSun()
{
	local Actor Other;
	local SunLight SL;
	local Vector X, End, HitLocation, HitNormal,Start;
	local Material HitMat;

	Start = Location;

	foreach AllActors(Class'SunLight',SL)
	{
		if ( (SL != None) && (SL.Region.Zone.IsA('SkyZoneInfo')) )
		{
			X = (Vector(SL.Rotation))* -1;
			End = Start + 50000 * X;
			Other = Trace(HitLocation, HitNormal, End, Start, true,, HitMat);
			If ( (Other!=None) && (HitMat==Texture'MyPackage.MySkyTexture') )
				ClientMessage("Saw Sun");
                                //You are affected by a sunlightactor!
		}
	}
}

The basic idea is, that you put one texture (I called it MySkyTexture here) on every surface you want to handle with fakebackdrop, so the code knows that the skybox is there. So if you can see the skybox at the angle opposing the rotation of the sunlightactor, the sunlight actor shines on you!