gzdoom-gles/wadsrc/static/zscript/shared/bridge.txt

// Bridge ball -------------------------------------------------------------

class BridgeBall : Actor
{
	default
	{
		+NOBLOCKMAP
		+NOTELEPORT
		+NOGRAVITY
	}

	action native void A_BridgeOrbit();
	
	States
	{
	Spawn:
		TLGL A 2 Bright;
		TLGL A 1 Bright A_BridgeOrbit;
		Wait;
	}

}

// The bridge itself -------------------------------------------------------

class CustomBridge : Actor native
{
	default
	{
		+SOLID
		+NOGRAVITY
		+NOLIFTDROP
		+ACTLIKEBRIDGE
		Radius 32;
		Height 2;
		RenderStyle "None";
	}

	action native void A_BridgeInit(class<Actor> balltype = "BridgeBall");

	states
	{
	Spawn:
		TLGL ABCDE 3 Bright;
		Loop;
	See:
		TLGL A 2;
		TLGL A 2 A_BridgeInit;
		TLGL A -1;
		Stop;
	Death:
		TLGL A 2;
		TLGL A 300;
		Stop;
	}
}

// The Hexen bridge -------------------------------------------------------

class Bridge : CustomBridge
{
	default
	{
		RenderStyle "None";
		Args 32, 2, 3, 0;
	}
}

// The ZDoom bridge -------------------------------------------------------

class ZBridge : CustomBridge
{
	default
	{
		Args 36, 4, 0, 0;
	}
}


// Invisible bridge --------------------------------------------------------

class InvisibleBridge : Actor native
{
	default
	{
		RenderStyle "None";
		Radius 32;
		Height 4;
		+SOLID
		+NOGRAVITY
		+NOLIFTDROP
		+ACTLIKEBRIDGE
	}
	States
	{
	Spawn:
		TNT1 A -1;
		Stop;
	}
}

// And some invisible bridges from Skull Tag -------------------------------

class InvisibleBridge32 : InvisibleBridge
{
	default
	{
		Radius 32;
		Height 8;
	}
}

class InvisibleBridge16 : InvisibleBridge
{
	default
	{
		Radius 16;
		Height 8;
	}
}

class InvisibleBridge8 : InvisibleBridge
{
	default
	{
		Radius 8;
		Height 8;
	}
}