Crossing the finish line first before anyone else gives you a free rainbow boost

src/doomstat.h

@@ -534,6 +534,7 @@ extern tic_t hyubgone;
 extern tic_t mapreset;
 extern boolean thwompsactive;
 extern SINT8 spbplace;
+extern boolean rainbowstartavailable;
 
 extern tic_t bombflashtimer;	// Used to avoid causing seizures if multiple mines explode close to you :)
 extern boolean legitimateexit;

src/g_game.c

@@ -289,6 +289,7 @@ tic_t hyubgone; // Cooldown before hyudoro is allowed to be rerolled
 tic_t mapreset; // Map reset delay when enough players have joined an empty game
 boolean thwompsactive; // Thwomps activate on lap 2
 SINT8 spbplace; // SPB exists, give the person behind better items
+boolean rainbowstartavailable; // Boolean, keeps track of if the rainbow start was gotten
 
 // Client-sided, unsynched variables (NEVER use in anything that needs to be synced with other players)
 tic_t bombflashtimer = 0;	// Cooldown before another FlashPal can be intialized by a bomb exploding near a displayplayer. Avoids seizures.

src/k_kart.c

@@ -6488,7 +6488,7 @@ Stage 1: red sparks
 Stage 2: blue sparks
 Stage 3: big large rainbow sparks
 */
-static void K_SpawnDriftBoostExplosion(player_t *player, int stage)
+void K_SpawnDriftBoostExplosion(player_t *player, int stage)
 {
 	mobj_t *overlay = P_SpawnMobj(player->mo->x, player->mo->y, player->mo->z, MT_DRIFTEXPLODE);
 

src/k_kart.h

@@ -63,6 +63,7 @@ void K_UpdateDistanceFromFinishLine(player_t *const player);
 boolean K_CheckPlayersRespawnColliding(INT32 playernum, fixed_t x, fixed_t y);
 INT16 K_GetKartTurnValue(player_t *player, INT16 turnvalue);
 INT32 K_GetKartDriftSparkValue(player_t *player);
+void K_SpawnDriftBoostExplosion(player_t *player, int stage);
 void K_KartUpdatePosition(player_t *player);
 void K_DropItems(player_t *player);
 void K_StripItems(player_t *player);

src/p_saveg.c

@@ -3472,6 +3472,7 @@ static void P_NetArchiveMisc(void)
 
 	WRITEUINT8(save_p, thwompsactive);
 	WRITESINT8(save_p, spbplace);
+	WRITEUINT8(save_p, rainbowstartavailable);
 
 	// Is it paused?
 	if (paused)
@@ -3597,6 +3598,7 @@ static inline boolean P_NetUnArchiveMisc(void)
 
 	thwompsactive = (boolean)READUINT8(save_p);
 	spbplace = READSINT8(save_p);
+	rainbowstartavailable = (boolean)READUINT8(save_p);
 
 	// Is it paused?
 	if (READUINT8(save_p) == 0x2f)

src/p_setup.c

@@ -2368,6 +2368,7 @@ lumpnum_t lastloadedmaplumpnum; // for comparative savegame
 static void P_LevelInitStuff(void)
 {
 	INT32 i;
+	UINT8 p = 0;
 
 	leveltime = 0;
 
@@ -2414,6 +2415,9 @@ static void P_LevelInitStuff(void)
 
 	for (i = 0; i < MAXPLAYERS; i++)
 	{
+		if (playeringame[i] && !players[i].spectator)
+			p++;
+
 		if (grandprixinfo.gp == false)
 		{
 			players[i].lives = 3;
@@ -2463,6 +2467,11 @@ static void P_LevelInitStuff(void)
 		players[i].follower = NULL;
 	}
 
+	rainbowstartavailable = false;
+
+	if (p >= 2)
+		rainbowstartavailable = true;
+
 	// SRB2Kart: map load variables
 	if (grandprixinfo.gp == true)
 	{
@@ -2505,6 +2514,10 @@ static void P_LevelInitStuff(void)
 
 	memset(&battleovertime, 0, sizeof(struct battleovertime));
 	speedscramble = encorescramble = -1;
+
+	
+
+	
 }
 
 //

src/p_spec.c

@@ -2194,6 +2194,13 @@ static void K_HandleLapIncrement(player_t *player)
 			player->karthud[khud_fault] = 1;
 			player->mo->momx = player->mo->momy = 0;
 		}
+		else if (rainbowstartavailable == true)
+		{
+			S_StartSound(player->mo, sfx_s23c);
+			player->kartstuff[k_driftboost] = 125;
+			K_SpawnDriftBoostExplosion(player, 3);
+			rainbowstartavailable = false;
+		}
 	}
 }