Battle: use round end camera when player wins with final KO

src/k_endcam.cpp

@@ -195,3 +195,22 @@ void K_LoadEndCamera(savebuffer_t *save)
 {
 	endcam_cast().Archive(srb2::UnArchiveWrapper(save));
 }
+
+void K_StartRoundWinCamera(mobj_t *origin, angle_t focusAngle, fixed_t finalRadius, tic_t panDuration, fixed_t panSpeed)
+{
+	const fixed_t angF = AngleFixed(focusAngle);
+
+	g_endcam.origin = {origin->x, origin->y, P_GetMobjHead(origin)};
+	g_endcam.startRadius = {2400*mapobjectscale, 800*mapobjectscale};
+	g_endcam.endRadius = {finalRadius, finalRadius / 2};
+
+	g_endcam.swirlDuration = 3*TICRATE;
+	g_endcam.startAngle = angF + (90*FRACUNIT);
+	g_endcam.endAngle = angF + (720*FRACUNIT);
+
+	P_SetTarget(&g_endcam.panMobj, origin);
+	g_endcam.panDuration = panDuration;
+	g_endcam.panSpeed = panSpeed;
+
+	K_CommitEndCamera();
+}

src/k_endcam.h

@@ -58,6 +58,9 @@ extern endcam_t g_endcam;
 // function, so the camera can cut away cleanly.
 void K_CommitEndCamera(void);
 
+// Automatically set up a cool camera in one-shot.
+void K_StartRoundWinCamera(mobj_t *origin, angle_t focusAngle, fixed_t finalRadius, tic_t panDuration, fixed_t panSpeed);
+
 /// ...
 
 // Low-level functions

src/k_kart.c

@@ -50,6 +50,7 @@
 #include "k_tally.h"
 #include "music.h"
 #include "m_easing.h"
+#include "k_endcam.h"
 
 // SOME IMPORTANT VARIABLES DEFINED IN DOOMDEF.H:
 // gamespeed is cc (0 for easy, 1 for normal, 2 for hard)
@@ -3918,6 +3919,16 @@ void K_BattleAwardHit(player_t *player, player_t *victim, mobj_t *inflictor, UIN
 	{
 		player->roundscore = 100; // Make sure you win!
 		P_DoAllPlayersExit(0, false);
+
+		mobj_t *source = !P_MobjWasRemoved(inflictor) ? inflictor : player->mo;
+
+		K_StartRoundWinCamera(
+			victim->mo,
+			R_PointToAngle2(source->x, source->y, victim->mo->x, victim->mo->y) + ANGLE_135,
+			200*mapobjectscale,
+			8*TICRATE,
+			FRACUNIT/512
+		);
 	}
 
 	P_AddPlayerScore(player, points);