Add grow/shrink particles

src/deh_tables.c

@@ -3755,6 +3755,9 @@ const char *const STATE_LIST[] = { // array length left dynamic for sanity testi
 	// Caked-Up Booty-Sheet Ghost
 	"S_HYUDORO",
 
+	// Grow
+	"S_GROW_PARTICLE",
+
 	// Shrink
 	"S_SHRINK_GUN",
 	"S_SHRINK_LASER",
@@ -5342,6 +5345,8 @@ const char *const MOBJTYPE_LIST[] = {  // array length left dynamic for sanity t
 	"MT_HYUDORO",
 	"MT_HYUDORO_CENTER",
 
+	"MT_GROW_PARTICLE",
+
 	"MT_SHRINK_POHBEE",
 	"MT_SHRINK_GUN",
 	"MT_SHRINK_CHAIN",

src/info.c

@@ -573,6 +573,7 @@ char sprnames[NUMSPRITES + 1][5] =
 	"FLML", // Flame Shield speed lines
 	"FLMF", // Flame Shield flash
 	"HYUU", // Hyudoro
+	"GRWP", // Grow
 	"SHRG", // Shrink gun / laser
 	"SINK", // Kitchen Sink
 	"SITR", // Kitchen Sink Trail
@@ -4315,6 +4316,8 @@ state_t states[NUMSTATES] =
 
 	{SPR_HYUU, FF_FULLBRIGHT, -1, {NULL}, 0, 0, S_NULL}, // S_HYUDORO
 
+	{SPR_GRWP, FF_ADD|FF_FULLBRIGHT|FF_ANIMATE, 13, {NULL}, 7, 1, S_NULL}, // S_GROW_PARTICLE
+
 	{SPR_SHRG, 0, -1, {NULL}, 0, 0, S_NULL}, // S_SHRINK_GUN
 	{SPR_SHRG, FF_FULLBRIGHT|1, -1, {NULL}, 0, 0, S_NULL}, // S_SHRINK_LASER
 	{SPR_SHRG, FF_FULLBRIGHT|2, -1, {NULL}, 0, 0, S_NULL}, // S_SHRINK_PARTICLE
@@ -24041,6 +24044,33 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 		S_NULL          // raisestate
 	},
 
+	{           // MT_GROW_PARTICLE
+		-1,             // doomednum
+		S_GROW_PARTICLE, // spawnstate
+		1000,           // spawnhealth
+		S_NULL,         // seestate
+		sfx_None,       // seesound
+		8,              // reactiontime
+		sfx_None,       // attacksound
+		S_NULL,         // painstate
+		0,              // painchance
+		sfx_None,       // painsound
+		S_NULL,         // meleestate
+		S_NULL,         // missilestate
+		S_NULL,         // deathstate
+		S_NULL,         // xdeathstate
+		sfx_None,       // deathsound
+		0,              // speed
+		4*FRACUNIT,     // radius
+		8*FRACUNIT,     // height
+		0,              // display offset
+		0,              // mass
+		0,              // damage
+		sfx_None,       // activesound
+		MF_SCENERY|MF_NOCLIP|MF_NOCLIPTHING|MF_NOCLIPHEIGHT|MF_NOGRAVITY|MF_DONTENCOREMAP, // flags
+		S_NULL          // raisestate
+	},
+
 	{           // MT_SHRINK_POHBEE
 		-1,             // doomednum
 		S_HYUDORO,      // spawnstate

src/info.h

@@ -1119,6 +1119,7 @@ typedef enum sprite
 	SPR_FLML, // Flame Shield speed lines
 	SPR_FLMF, // Flame Shield flash
 	SPR_HYUU, // Hyudoro
+	SPR_GRWP, // Grow
 	SPR_SHRG, // Shrink gun / laser
 	SPR_SINK, // Kitchen Sink
 	SPR_SITR, // Kitchen Sink Trail
@@ -4746,6 +4747,9 @@ typedef enum state
 	// Caked-Up Booty-Sheet Ghost
 	S_HYUDORO,
 
+	// Grow
+	S_GROW_PARTICLE,
+
 	// Shrink
 	S_SHRINK_GUN,
 	S_SHRINK_LASER,
@@ -6369,6 +6373,8 @@ typedef enum mobj_type
 	MT_HYUDORO,
 	MT_HYUDORO_CENTER,
 
+	MT_GROW_PARTICLE,
+
 	MT_SHRINK_POHBEE,
 	MT_SHRINK_GUN,
 	MT_SHRINK_CHAIN,

src/k_kart.c

@@ -2284,6 +2284,57 @@ void K_SpawnInvincibilitySpeedLines(mobj_t *mo)
 		fast->destscale = 6*((mo->player->invincibilitytimer/TICRATE)*FRACUNIT)/8;
 }
 
+static void K_SpawnGrowShrinkParticles(mobj_t *mo, INT32 timer)
+{
+	const boolean shrink = (timer < 0);
+	const INT32 maxTime = (10*TICRATE);
+	INT32 spawnFreq = 1;
+
+	mobj_t *particle = NULL;
+	fixed_t particleSpeed = 0;
+
+	spawnFreq = (maxTime - min(maxTime, abs(timer))) / TICRATE / 2;
+	if (spawnFreq == 0)
+	{
+		spawnFreq++;
+	}
+
+	if (leveltime % spawnFreq != 0)
+	{
+		return;
+	}
+
+	particle = P_SpawnMobjFromMobj(
+		mo,
+		P_RandomRange(-32, 32) * FRACUNIT,
+		P_RandomRange(-32, 32) * FRACUNIT,
+		(shrink ? P_RandomRange(24, 48) : P_RandomRange(0, 24)) * FRACUNIT,
+		MT_GROW_PARTICLE
+	);
+
+	P_SetTarget(&particle->target, mo);
+
+	particle->momx = mo->momx;
+	particle->momy = mo->momy;
+	particle->momz = P_GetMobjZMovement(mo);
+
+	K_MatchGenericExtraFlags(particle, mo);
+
+	particleSpeed = particle->scale * 4 * P_MobjFlip(mo);
+
+	if (shrink == true)
+	{
+		particle->color = SKINCOLOR_KETCHUP;
+		particle->momz -= particleSpeed;
+		particle->renderflags |= RF_VERTICALFLIP;
+	}
+	else
+	{
+		particle->color = SKINCOLOR_SAPPHIRE;
+		particle->momz += particleSpeed;
+	}
+}
+
 void K_SpawnBumpEffect(mobj_t *mo)
 {
 	mobj_t *fx = P_SpawnMobj(mo->x, mo->y, mo->z, MT_BUMP);
@@ -7325,6 +7376,11 @@ void K_KartPlayerThink(player_t *player, ticcmd_t *cmd)
 			}
 		}
 
+		if (player->growshrinktimer != 0)
+		{
+			K_SpawnGrowShrinkParticles(player->mo, player->growshrinktimer);
+		}
+
 		if (gametype == GT_RACE && player->rings <= 0) // spawn ring debt indicator
 		{
 			mobj_t *debtflag = P_SpawnMobj(player->mo->x + player->mo->momx, player->mo->y + player->mo->momy,