fixes beam rifles and some micro optimizations to projectiles and readds the chameleon gun for debugging (#11528)

* wew

* ah

* k

* k

* faster

code/modules/projectiles/projectile.dm

@@ -52,6 +52,8 @@
 	var/hitscan = FALSE		//Whether this is hitscan. If it is, speed is basically ignored.
 	var/list/beam_segments	//assoc list of datum/point or datum/point/vector, start = end. Used for hitscan effect generation.
 	var/datum/point/beam_index
+	/// Used in generate_hitscan_tracers to determine which "cycle" we're on.
+	var/hitscan_effect_generation = 0
 	var/tracer_type
 	var/muzzle_type
 	var/impact_type
@@ -89,10 +91,10 @@
 	var/decayedRange			//stores original range
 	var/reflect_range_decrease = 5			//amount of original range that falls off when reflecting, so it doesn't go forever
 	var/is_reflectable = FALSE // Can it be reflected or not?
-	
+
 	/// factor to multiply by for zone accuracy percent.
 	var/zone_accuracy_factor = 1
-	
+
 		//Effects
 	var/stun = 0
 	var/knockdown = 0
@@ -656,18 +658,20 @@
 	if(trajectory && beam_index)
 		var/datum/point/pcache = trajectory.copy_to()
 		beam_segments[beam_index] = pcache
-	generate_hitscan_tracers(null, null, impacting)
+	generate_hitscan_tracers(null, null, impacting, hitscan_effect_generation++)
 
-/obj/item/projectile/proc/generate_hitscan_tracers(cleanup = TRUE, duration = 3, impacting = TRUE)
+/obj/item/projectile/proc/generate_hitscan_tracers(cleanup = TRUE, duration = 3, impacting = TRUE, generation)
 	if(!length(beam_segments))
 		return
+	. = list()
 	if(tracer_type)
-		var/tempref = REF(src)
+		var/list/turfs = list()
 		for(var/datum/point/p in beam_segments)
-			generate_tracer_between_points(p, beam_segments[p], tracer_type, color, duration, hitscan_light_range, hitscan_light_color_override, hitscan_light_intensity, tempref)
+			. += generate_tracer_between_points(p, beam_segments[p], tracer_type, color, duration, hitscan_light_range, hitscan_light_color_override, hitscan_light_intensity, turfs)
 	if(muzzle_type && duration > 0)
 		var/datum/point/p = beam_segments[1]
 		var/atom/movable/thing = new muzzle_type
+		. += thing
 		p.move_atom_to_src(thing)
 		var/matrix/M = new
 		M.Turn(original_angle)
@@ -678,6 +682,7 @@
 	if(impacting && impact_type && duration > 0)
 		var/datum/point/p = beam_segments[beam_segments[beam_segments.len]]
 		var/atom/movable/thing = new impact_type
+		. += thing
 		p.move_atom_to_src(thing)
 		var/matrix/M = new
 		M.Turn(Angle)