Backported changes from experimental branch.

Fixed crash on screen flashes due to misuse of StaticEventHandler.Find instead of EventHandler.Find (oops).

zscript.txt

@@ -1,8 +1,8 @@
 version "3.7"
 
-#include "zscript/mk_matrix.zsc"
+#include "zscript/dt_matrix.zsc"
-#include "zscript/mk_coordutil.zsc"
+#include "zscript/dt_coordutil.zsc"
-#include "zscript/mk_quaternion.zsc"
+#include "zscript/dt_quaternion.zsc"
 #include "zscript/utgore.zsc"
 #include "zscript/utcommon.zsc"
 #include "zscript/impacthammer.zsc"

zscript/biorifle.zsc

@@ -264,10 +264,10 @@ Class BioGel : Actor
 			for ( int i=0; i<numpt; i++ )
 			{
 				Vector3 pvel = (FRandom[GES](-1,1),FRandom[GES](-1,1),FRandom[GES](-1,1)).unit()*FRandom[GES](1,3);
-				Vector3 spos = pos;
+				Vector3 spos = pos+normal*2*scale.x;
-				if ( atplane == 1 ) spos += Normal*2;
 				let s = Spawn("BioSpark",spos);
 				s.vel = pvel;
+				if ( normal != (0,0,0) ) s.vel += normal*2;
 			}
 		}
 		if ( deadtimer <= -1 ) return;

zscript/eightball.zsc

@@ -306,7 +306,14 @@ Class UTRocketLauncher : UTWeapon
 	{
 		Super.Tick();
 		if ( !Owner ) return;
-		if ( LockedOn && (!LockedTarget || (LockedTarget.Health <= 0) || !LockedTarget.bIsMonster || LockedTarget.bKilled || LockedTarget.bCorpse || !LockedTarget.bShootable) )
+		if ( Owner.Health <= 0 )
+		{
+			LockedTarget = null;
+			LockedOn = false;
+			crosshair = 0;
+			return;
+		}
+		if ( LockedOn && (!LockedTarget || (LockedTarget.Health <= 0) || !LockedTarget.bIsMonster || LockedTarget.bKilled || LockedTarget.bCorpse || !LockedTarget.bShootable || (Owner.player.ReadyWeapon != self)) )
 		{
 			LockedTarget = null;
 			LockedOn = false;

zscript/flakcannon.zsc

@@ -158,6 +158,7 @@ Class FlakChunk : Actor
 	double rollvel, pitchvel, yawvel;
 	double lifetime, lifespeed;
 	int lifetics;
+	Vector3 oldvel;
 	Default
 	{
 		Obituary "%o was ripped to shreds by %k's Flak Cannon.";
@@ -167,13 +168,14 @@ Class FlakChunk : Actor
 		DamageFunction Random[Flak](15,20);
 		DamageType 'Shredded';
 		BounceType "Hexen";
-		BounceFactor 0.8;
+		BounceFactor 1.0;
-		WallBounceFactor 0.8;
+		WallBounceFactor 1.0;
 		PROJECTILE;
 		+USEBOUNCESTATE;
 		+CANBOUNCEWATER;
 		+SKYEXPLODE;
 		+INTERPOLATEANGLES;
+		+HITTRACER;
 		Scale 0.3;
 	}
 	override void PostBeginPlay()
@@ -192,6 +194,7 @@ Class FlakChunk : Actor
 	}
 	override void Tick()
 	{
+		oldvel = vel;
 		Super.Tick();
 		if ( globalfreeze || level.frozen ) return;
 		if ( waterlevel > 0 )
@@ -228,8 +231,39 @@ Class FlakChunk : Actor
 		pitch += pitchvel;
 		angle += pitchvel;
 	}
-	action void A_HandleBounce()
+	void A_HandleBounce()
 	{
+		// chunks in vanilla have a special variation on the standard reflect formula that causes them to bounce differently when hitting a surface head-on
+		// (0.5 to 0.8 reduction perpendicular to the surface normal, to be specific)
+		Vector3 HitNormal = -vel.unit();
+		if ( BlockingFloor ) HitNormal = BlockingFloor.floorplane.Normal;
+		else if ( BlockingCeiling ) HitNormal = BlockingCeiling.ceilingplane.Normal;
+		else if ( BlockingLine )
+		{
+			HitNormal = (-BlockingLine.delta.y,BlockingLine.delta.x,0).unit();
+			if ( !BlockingLine.sidedef[1] || (CurSector == BlockingLine.frontsector) )
+				HitNormal *= -1;
+		}
+		else if ( BlockingMobj )
+		{
+			Vector3 diff = level.Vec3Diff(pos,BlockingMobj.pos);
+			if ( (pos.x+radius) <= (BlockingMobj.pos.x-BlockingMobj.radius) )
+				HitNormal = (-1,0,0);
+			else if ( (pos.x-radius) >= (BlockingMobj.pos.x+BlockingMobj.radius) )
+				HitNormal = (1,0,0);
+			else if ( (pos.y+radius) <= (BlockingMobj.pos.y-BlockingMobj.radius) )
+				HitNormal = (0,-1,0);
+			else if ( (pos.y-radius) >= (BlockingMobj.pos.y+BlockingMobj.radius) )
+				HitNormal = (0,1,0);
+			else if ( pos.z >= (BlockingMobj.pos.z+BlockingMobj.height) )
+				HitNormal = (0,0,1);
+			else if ( (pos.z+height) <= BlockingMobj.pos.z )
+				HitNormal = (0,0,-1);
+		}
+		// undo the bounce, we need to hook in our own
+		vel = oldvel;
+		// re-do the bounce with our formula
+		vel = 0.8*((vel dot HitNormal)*HitNormal*(-1.8+FRandom[Flak](0.0,0.8))+vel);
 		bHITOWNER = true;
 		int numpt = Random[Flak](2,3);
 		if ( (frame < 10) && Random[Flak](0,1) )
@@ -244,13 +278,9 @@ Class FlakChunk : Actor
 		else A_SprayDecal("WallCrack",-8);
 		A_Gravity();
 		gravity = 0.35;
-		invoker.rollvel = FRandom[Flak](50,100)*RandomPick[Flak](-1,1)*(vel.length()/speed);
+		rollvel = FRandom[Flak](50,100)*RandomPick[Flak](-1,1)*(vel.length()/speed);
-		invoker.pitchvel = FRandom[Flak](50,100)*RandomPick[Flak](-1,1)*(vel.length()/speed);
+		pitchvel = FRandom[Flak](50,100)*RandomPick[Flak](-1,1)*(vel.length()/speed);
-		invoker.yawvel = FRandom[Flak](50,100)*RandomPick[Flak](-1,1)*(vel.length()/speed);
+		yawvel = FRandom[Flak](50,100)*RandomPick[Flak](-1,1)*(vel.length()/speed);
-		vel = (vel.unit()+(FRandom[Flak](-0.2,0.2),FRandom[Flak](-0.2,0.2),FRandom[Flak](-0.2,0.2))).unit()*vel.length();
-		// TODO chunks in vanilla have a special variation on the standard reflect formula that causes them to bounce differently when hitting a surface head-on
-		// (0.5 to 0.8 reduction perpendicular to the surface normal, to be specific)
-		// I have no idea how I'll even implement this reduction reliably
 		A_PlaySound("flak/bounce",volume:0.3);
 		A_AlertMonsters();
 		if ( vel.length() < 5.0 ) ExplodeMissile();
@@ -302,7 +332,12 @@ Class FlakChunk : Actor
 	Crash:
 		TNT1 A 0
 		{
-			Spawn("BulletPuff",pos);
+			let l = Spawn("BulletImpact",pos);
+			Vector3 dir;
+			if ( tracer ) dir = level.Vec3Diff(pos,tracer.Vec3Offset(0,0,tracer.height/2)).unit();
+			else dir = vel.unit();
+			l.angle = atan2(dir.y,dir.x);
+			l.pitch = asin(-dir.z);
 			A_PlaySound("flak/hit",volume:0.3);
 			A_AlertMonsters();
 		}

zscript/utcommon.zsc

@@ -1964,7 +1964,7 @@ Class UTMainHandler : EventHandler
 		qf.c = c;
 		qf.tic = gametic;
 		qf.cam = camera;
-		let hnd = UTMainHandler(StaticEventHandler.Find("UTMainHandler"));
+		let hnd = UTMainHandler(EventHandler.Find("UTMainHandler"));
 		hnd.flashes.push(qf);
 	}