Extra effects for Prison Egg CD

- The goal here is to make it more obvious if a CD drops,
  and make the CD more visible.
- Rainbow sparkles scaled up by x3.
- Play long "powering down" noise when a Prison with a CD
  inside is destroyed.
  - CD spawns after noise stops playing.
- Spawn a twinkle (Gainax).
  - Flickers while "powering down" noise is playing.
  - Enlarges and disappears in sync with the "CD dropped"
    sound effect.
- Darken the map while all of this is happening.

src/deh_tables.c

@@ -506,6 +506,10 @@ const char *const STATE_LIST[] = { // array length left dynamic for sanity testi
 
 	// Prison Egg Drops
 	"S_PRISONEGGDROP_CD",
+	"S_PRISONEGGDROP_FLAREA1",
+	"S_PRISONEGGDROP_FLAREA2",
+	"S_PRISONEGGDROP_FLAREB1",
+	"S_PRISONEGGDROP_FLAREB2",
 
 	// Bubble Source
 	"S_BUBBLES1",

src/info.c

@@ -1013,6 +1013,10 @@ state_t states[NUMSTATES] =
 
 	// Prison Egg Drops
 	{SPR_ALTM, 0|FF_PAPERSPRITE|FF_SEMIBRIGHT, -1, {NULL}, 0, 0, S_NULL}, // S_PRISONEGGDROP_CD
+	{SPR_LENS, 14|FF_FULLBRIGHT|FF_ADD|FF_TRANS10, 1, {NULL}, 0, 0, S_PRISONEGGDROP_FLAREA2}, // S_PRISONEGGDROP_FLAREA1
+	{SPR_NULL, 0, 1, {NULL}, 0, 0, S_PRISONEGGDROP_FLAREA1}, // S_PRISONEGGDROP_FLAREA2
+	{SPR_LENS, 11|FF_FULLBRIGHT|FF_ADD|FF_TRANS10|FF_ANIMATE, 16, {NULL}, 7, 2, S_PRISONEGGDROP_FLAREB2}, // S_PRISONEGGDROP_FLAREB1
+	{SPR_LENS, 19|FF_FULLBRIGHT|FF_ADD|FF_TRANS10|FF_ANIMATE, 6, {NULL}, 1, 2, S_NULL}, // S_PRISONEGGDROP_FLAREB2
 
 	// Bubble Source
 	{SPR_BBLS, 0, 8, {A_BubbleSpawn}, 2048, 0, S_BUBBLES2}, // S_BUBBLES1

src/info.h

@@ -1499,6 +1499,10 @@ typedef enum state
 
 	// Prison Egg Drops
 	S_PRISONEGGDROP_CD,
+	S_PRISONEGGDROP_FLAREA1,
+	S_PRISONEGGDROP_FLAREA2,
+	S_PRISONEGGDROP_FLAREB1,
+	S_PRISONEGGDROP_FLAREB2,
 
 	// Bubble Source
 	S_BUBBLES1,

src/p_inter.c

@@ -1226,6 +1226,10 @@ static void P_AddBrokenPrison(mobj_t *target, mobj_t *inflictor, mobj_t *source)
 
 			if (secretpickup)
 			{
+				// Grab attention with a long sound effect.
+				target->hitlag += 56;
+				S_StartSound(target, sfx_s3k85);
+
 				secretpickup->hitlag = target->hitlag;
 
 				secretpickup->z -= secretpickup->height/2;
@@ -1252,6 +1256,26 @@ static void P_AddBrokenPrison(mobj_t *target, mobj_t *inflictor, mobj_t *source)
 					secretpickup, secretpickup->angle,
 					P_ReturnThrustX(secretpickup, launchangle, launchmomentum)
 				);
+
+				mobj_t *flare = P_SpawnMobj(
+					target->x, target->y,
+					target->z + target->height/2,
+					MT_SPARK
+				);
+
+				if (flare)
+				{
+					// Will flicker in place until secretpickup exits hitlag.
+					flare->colorized = true;
+					flare->renderflags |= RF_ALWAYSONTOP;
+					P_InstaScale(flare, 4 * flare->scale);
+					P_SetTarget(&secretpickup->target, flare);
+					P_SetMobjStateNF(flare, S_PRISONEGGDROP_FLAREA1);
+				}
+
+				// Darken the level for roughly how long it takes until the last sound effect stops playing.
+				g_darkness.start = leveltime;
+				g_darkness.end = leveltime + target->hitlag + TICRATE + DARKNESS_FADE_TIME;
 			}
 		}
 	}

src/p_mobj.c

@@ -7499,6 +7499,10 @@ static boolean P_MobjRegularThink(mobj_t *mobj)
 
 			mobj->z += P_MobjFlip(mobj);
 			mobj->flags2 |= MF2_AMBUSH;
+
+			// Finish flare animation.
+			if (mobj->target && !P_MobjWasRemoved(mobj->target))
+				P_SetMobjStateNF(mobj->target, S_PRISONEGGDROP_FLAREB1);
 		}
 
 		if (teststate == S_PRISONEGGDROP_CD)
@@ -7538,6 +7542,12 @@ static boolean P_MobjRegularThink(mobj_t *mobj)
 
 					sparkle->color = M_RandomChance(FRACUNIT/2) ? SKINCOLOR_ULTRAMARINE : SKINCOLOR_MAGENTA;
 					sparkle->momz += 8 * mobj->scale * P_MobjFlip(mobj);
+					sparkle->scale = 3 * sparkle->scale;
+					sparkle->scalespeed = abs(sparkle->scale - sparkle->destscale) / 16;
+
+					// Colorize flare.
+					if (mobj->target && !P_MobjWasRemoved(mobj->target))
+						mobj->target->color = sparkle->color;
 				}
 			}
 		}

src/sounds.c

@@ -534,7 +534,7 @@ sfxinfo_t S_sfx[NUMSFX] =
   {"s3k82",  false,  64,  0, -1, NULL, 0,        -1,  -1, LUMPERROR, "Burst"},
   {"s3k83",  false,  64,  0, -1, NULL, 0,        -1,  -1, LUMPERROR, "Collapsing"},
   {"s3k84",  false,  64,  0, -1, NULL, 0,        -1,  -1, LUMPERROR, "Powering up"},
-  {"s3k85",  false,  64,  0, -1, NULL, 0,        -1,  -1, LUMPERROR, "Powering down"},
+  {"s3k85",  false,  64, 24, -1, NULL, 0,        -1,  -1, LUMPERROR, "Powering down"},
   {"s3k86",  false, 128,  8, -1, NULL, 0,        -1,  -1, LUMPERROR, "Alarm"},
   {"s3k87",  false,  64,  0, -1, NULL, 0,        -1,  -1, LUMPERROR, "Bounce"},
   {"s3k88",  false,  64,  0, -1, NULL, 0,        -1,  -1, LUMPERROR, "Metallic squeak"},