Drop power-ups when whipped

- Dropped power-ups become paper items (overloaded to
  store power-ups instead of items).
- The dropped power-up stores its remaining duration.
- The power-up can be picked up during any state.
  - If you already have the same kind of power-up, the
    duration is simply extended.

src/CMakeLists.txt

@@ -146,6 +146,7 @@ add_executable(SRB2SDL2 MACOSX_BUNDLE WIN32
 	k_serverstats.c
 	k_zvote.c
 	k_mapuser.c
+	k_powerup.cpp
 )
 
 if(SRB2_CONFIG_ENABLE_WEBM_MOVIES)

src/info.c

@@ -648,6 +648,7 @@ char sprnames[NUMSPRITES + 1][5] =
 	"ITMO",
 	"ITMI",
 	"ITMN",
+	"PWRB",
 	"WANT",
 
 	"PBOM", // player bomb

src/info.h

@@ -1201,6 +1201,7 @@ typedef enum sprite
 	SPR_ITMO,
 	SPR_ITMI,
 	SPR_ITMN,
+	SPR_PWRB,
 	SPR_WANT,
 
 	SPR_PBOM, // player bomb

src/k_battle.h

@@ -10,6 +10,7 @@ extern "C" {
 
 #define BATTLE_SPAWN_INTERVAL (4*TICRATE)
 #define BATTLE_DESPAWN_TIME (15*TICRATE)
+#define BATTLE_POWERUP_TIME (20*TICRATE)
 
 extern struct battleovertime
 {

src/k_collide.cpp

@@ -16,6 +16,7 @@
 #include "k_objects.h"
 #include "k_roulette.h"
 #include "k_podium.h"
+#include "k_powerup.h"
 
 angle_t K_GetCollideAngle(mobj_t *t1, mobj_t *t2)
 {
@@ -888,6 +889,8 @@ boolean K_InstaWhipCollide(mobj_t *shield, mobj_t *victim)
 			P_PlayerRingBurst(victimPlayer, 5);
 			P_DamageMobj(victim, shield, attacker, 1, DMG_STUMBLE); // There's a special exception in P_DamageMobj for type==MT_INSTAWHIP
 
+			K_DropPowerUps(victimPlayer);
+
 			angle_t thrangle = ANGLE_180 + R_PointToAngle2(victim->x, victim->y, shield->x, shield->y);
 			P_Thrust(victim, thrangle, FRACUNIT*10);
 

src/k_kart.c

@@ -6532,13 +6532,26 @@ SINT8 K_GetTotallyRandomResult(UINT8 useodds)
 	return i;
 }
 
-mobj_t *K_CreatePaperItem(fixed_t x, fixed_t y, fixed_t z, angle_t angle, SINT8 flip, UINT8 type, UINT8 amount)
+mobj_t *K_CreatePaperItem(fixed_t x, fixed_t y, fixed_t z, angle_t angle, SINT8 flip, UINT8 type, UINT16 amount)
 {
 	mobj_t *drop = P_SpawnMobj(x, y, z, MT_FLOATINGITEM);
-	mobj_t *backdrop = P_SpawnMobjFromMobj(drop, 0, 0, 0, MT_OVERLAY);
 
-	P_SetTarget(&backdrop->target, drop);
-	P_SetMobjState(backdrop, S_ITEMBACKDROP);
+	// FIXME: due to linkdraw sucking major ass, I was unable
+	// to make a backdrop render behind dropped power-ups
+	// (which use a smaller sprite than normal items). So
+	// dropped power-ups have the backdrop baked into the
+	// sprite for now.
+	if (type < FIRSTPOWERUP)
+	{
+		mobj_t *backdrop = P_SpawnMobjFromMobj(drop, 0, 0, 0, MT_OVERLAY);
+
+		P_SetTarget(&backdrop->target, drop);
+		P_SetMobjState(backdrop, S_ITEMBACKDROP);
+
+		backdrop->dispoffset = 1;
+		P_SetTarget(&backdrop->tracer, drop);
+		backdrop->flags2 |= MF2_LINKDRAW;
+	}
 
 	P_SetScale(drop, drop->scale>>4);
 	drop->destscale = (3*drop->destscale)/2;
@@ -6587,9 +6600,6 @@ mobj_t *K_CreatePaperItem(fixed_t x, fixed_t y, fixed_t z, angle_t angle, SINT8
 	}
 
 	drop->flags |= MF_NOCLIPTHING;
-	backdrop->dispoffset = 1;
-	P_SetTarget(&backdrop->tracer, drop);
-	backdrop->flags2 |= MF2_LINKDRAW;
 
 	if (gametyperules & GTR_CLOSERPLAYERS)
 	{
@@ -12004,8 +12014,17 @@ void K_UpdateMobjItemOverlay(mobj_t *part, SINT8 itemType, UINT8 itemCount)
 			part->frame = FF_FULLBRIGHT|FF_PAPERSPRITE;
 			break;
 		default:
-			part->sprite = SPR_ITEM;
-			part->frame = FF_FULLBRIGHT|FF_PAPERSPRITE|(itemType);
+			if (itemType >= FIRSTPOWERUP)
+			{
+				part->sprite = SPR_PWRB;
+				// Not a papersprite. See K_CreatePaperItem for why.
+				part->frame = FF_FULLBRIGHT|(itemType - FIRSTPOWERUP);
+			}
+			else
+			{
+				part->sprite = SPR_ITEM;
+				part->frame = FF_FULLBRIGHT|FF_PAPERSPRITE|(itemType);
+			}
 			break;
 	}
 }

src/k_kart.h

@@ -150,7 +150,7 @@ void K_SpawnDriftElectricSparks(player_t *player, int color, boolean shockwave);
 void K_KartUpdatePosition(player_t *player);
 void K_UpdateAllPlayerPositions(void);
 SINT8 K_GetTotallyRandomResult(UINT8 useodds);
-mobj_t *K_CreatePaperItem(fixed_t x, fixed_t y, fixed_t z, angle_t angle, SINT8 flip, UINT8 type, UINT8 amount);
+mobj_t *K_CreatePaperItem(fixed_t x, fixed_t y, fixed_t z, angle_t angle, SINT8 flip, UINT8 type, UINT16 amount);
 void K_DropPaperItem(player_t *player, UINT8 itemtype, UINT16 itemamount);
 void K_PopPlayerShield(player_t *player);
 void K_DropItems(player_t *player);

src/k_powerup.cpp

@@ -0,0 +1,50 @@
+/// \brief Battle mode power-up code
+
+#include "k_kart.h"
+#include "k_objects.h"
+#include "k_powerup.h"
+
+tic_t K_PowerUpRemaining(const player_t* player, kartitems_t powerup)
+{
+	switch (powerup)
+	{
+	case POWERUP_SUPERFLICKY:
+		return Obj_SuperFlickySwarmTime(player->powerup.flickyController);
+
+	default:
+		return 0u;
+	}
+}
+
+void K_GivePowerUp(player_t* player, kartitems_t powerup, tic_t time)
+{
+	switch (powerup)
+	{
+	case POWERUP_SUPERFLICKY:
+		if (K_PowerUpRemaining(player, POWERUP_SUPERFLICKY))
+		{
+			Obj_ExtendSuperFlickySwarm(player->powerup.flickyController, time);
+		}
+		else
+		{
+			Obj_SpawnSuperFlickySwarm(player, time);
+		}
+		break;
+
+	default:
+		break;
+	}
+}
+
+void K_DropPowerUps(player_t* player)
+{
+	if (K_PowerUpRemaining(player, POWERUP_SUPERFLICKY))
+	{
+		mobj_t* swarm = player->powerup.flickyController;
+
+		// Be sure to measure the remaining time before ending the power-up
+		K_DropPaperItem(player, POWERUP_SUPERFLICKY, Obj_SuperFlickySwarmTime(swarm));
+
+		Obj_EndSuperFlickySwarm(swarm);
+	}
+}

src/k_powerup.h

@@ -0,0 +1,19 @@
+#ifndef __K_POWERUP__
+#define __K_POWERUP__
+
+#include "doomtype.h"
+#include "d_player.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+tic_t K_PowerUpRemaining(const player_t *player, kartitems_t powerup);
+void K_GivePowerUp(player_t *player, kartitems_t powerup, tic_t timer);
+void K_DropPowerUps(player_t *player);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // __K_POWERUP__

src/p_inter.c

@@ -41,6 +41,7 @@
 #include "k_roulette.h"
 #include "k_boss.h"
 #include "acs/interface.h"
+#include "k_powerup.h"
 
 // CTF player names
 #define CTFTEAMCODE(pl) pl->ctfteam ? (pl->ctfteam == 1 ? "\x85" : "\x84") : ""
@@ -276,14 +277,21 @@ void P_TouchSpecialThing(mobj_t *special, mobj_t *toucher, boolean heightcheck)
 			P_InstaThrust(player->mo, player->mo->angle, 20<<FRACBITS);
 			return;
 		case MT_FLOATINGITEM: // SRB2Kart
-			if (!P_CanPickupItem(player, 3) || (player->itemamount && player->itemtype != special->threshold))
-				return;
-
-			player->itemtype = special->threshold;
-			if ((UINT16)(player->itemamount) + special->movecount > 255)
-				player->itemamount = 255;
+			if (special->threshold >= FIRSTPOWERUP)
+			{
+				K_GivePowerUp(player, special->threshold, special->movecount);
+			}
 			else
-				player->itemamount += special->movecount;
+			{
+				if (!P_CanPickupItem(player, 3) || (player->itemamount && player->itemtype != special->threshold))
+					return;
+
+				player->itemtype = special->threshold;
+				if ((UINT16)(player->itemamount) + special->movecount > 255)
+					player->itemamount = 255;
+				else
+					player->itemamount += special->movecount;
+			}
 
 			S_StartSound(special, special->info->deathsound);