[PTBF] Wavy Vision (#27674)

* Initial commit

* Finished it up

* adds a define for clarity

* actually adds it to hallucinating

---------

Signed-off-by: Luc <89928798+lewcc@users.noreply.github.com>
Co-authored-by: Luc <89928798+lewcc@users.noreply.github.com>

code/modules/hallucinations/effects/waves_hallucination.dm

@@ -0,0 +1,58 @@
+/**
+	* Hallucination - Waves
+	*
+	* Makes the owner's screen all funky and wavy.
+*/
+#define WAVES_HALLUCINATION_FILTER "ripple_hallucination"
+#define WAVE_VERTICAL 0
+
+/obj/effect/hallucination/no_delete/waves
+
+/datum/hallucination_manager/waves
+	initial_hallucination = /obj/effect/hallucination/no_delete/waves
+	trigger_time = 20 SECONDS
+	/// How many wave filters the hallucination spawns.
+	var/amount_spawned
+	// Maximum distortion size in pixels
+	var/size
+	/// Phase of wave, in periods
+	var/phase_offset
+	/// How many pixels each wave will be off in the y direction
+	var/x_offset
+	/// How many pixels each wave will be off in the y direction
+	var/y_offset
+	/// If the filter will be sideways or vertical
+	var/orientation
+	var/atom/movable/plane_master_controller/game_plane_master_controller
+
+/datum/hallucination_manager/waves/spawn_hallucination()
+	game_plane_master_controller = owner.hud_used?.plane_master_controllers[PLANE_MASTERS_GAME]
+	if(!game_plane_master_controller)
+		log_debug("No plane master controller found for [owner], ending hallucination.")
+		return
+	hallucination_list |= initial_hallucination
+	trigger_timer = addtimer(CALLBACK(src, PROC_REF(on_trigger)), trigger_time, TIMER_DELETE_ME) // Put the timer first so in case something goes wrong the filters still get deleted
+	on_spawn()
+
+/datum/hallucination_manager/waves/on_spawn()
+	amount_spawned = roll("4d3-3") // Results in a normal distribution from 1-9. 5 is the most likely result at ~23%
+	for(var/i in 1 to amount_spawned)
+		randomize_pulse()
+		game_plane_master_controller.add_filter(WAVES_HALLUCINATION_FILTER, 1, wave_filter(x_offset, y_offset, size, phase_offset, orientation))
+	game_plane_master_controller.transition_filter(WAVES_HALLUCINATION_FILTER, 20 SECONDS, list("x" = x_offset + 15, "y" = y_offset - 15, "offset" = phase_offset + 1), BOUNCE_EASING|EASE_IN|EASE_OUT)
+
+/datum/hallucination_manager/waves/proc/randomize_pulse()
+	size = rand() * 2.5 + 0.5 //between .05 and 3 pixels
+	phase_offset = rand()
+	var/x_sign = pick(-1, 1)
+	var/y_sign = pick(-1, 1)
+	orientation = pick(WAVE_SIDEWAYS, WAVE_VERTICAL)
+	x_offset = roll(5) * x_sign
+	y_offset = roll(5) * y_sign
+
+/datum/hallucination_manager/waves/on_trigger()
+	game_plane_master_controller.remove_filter(WAVES_HALLUCINATION_FILTER)
+	qdel(src)
+
+#undef WAVES_HALLUCINATION_FILTER
+#undef WAVE_VERTICAL

code/modules/hallucinations/hallucinations.dm

@@ -32,8 +32,9 @@ GLOBAL_LIST_INIT(hallucinations, list(
 		/obj/effect/hallucination/fake_grenade/spawner = 10,
 		/obj/effect/hallucination/terror_infestation = 10,
 		/obj/effect/hallucination/loose_energy_ball = 10,
+		/datum/hallucination_manager/xeno_pounce = 10,
+		/datum/hallucination_manager/waves = 2,
 		/obj/effect/hallucination/blob = 10,
-		/datum/hallucination_manager/xeno_pounce = 10
 	)
 ))