Small mech tweaks

code/game/mecha/equipment/tools/repair_droid.dm

@@ -27,16 +27,16 @@
 /obj/item/mecha_parts/mecha_equipment/repair_droid/attach(obj/mecha/M as obj)
 	..()
 	droid_overlay = new(src.icon, icon_state = "repair_droid")
-	M.overlays += droid_overlay
+	M.add_overlay(droid_overlay)
 	return
 
 /obj/item/mecha_parts/mecha_equipment/repair_droid/destroy()
-	chassis.overlays -= droid_overlay
+	chassis.cut_overlay(droid_overlay)
 	..()
 	return
 
 /obj/item/mecha_parts/mecha_equipment/repair_droid/detach()
-	chassis.overlays -= droid_overlay
+	chassis.cut_overlay(droid_overlay)
 	pr_repair_droid.stop()
 	..()
 	return
@@ -49,7 +49,7 @@
 /obj/item/mecha_parts/mecha_equipment/repair_droid/Topic(href, href_list)
 	..()
 	if(href_list["toggle_repairs"])
-		chassis.overlays -= droid_overlay
+		chassis.cut_overlay(droid_overlay)
 		if(pr_repair_droid.toggle())
 			droid_overlay = new(src.icon, icon_state = "repair_droid_a")
 			log_message("Activated.")
@@ -57,7 +57,7 @@
 			droid_overlay = new(src.icon, icon_state = "repair_droid")
 			log_message("Deactivated.")
 			set_ready_state(1)
-		chassis.overlays += droid_overlay
+		chassis.add_overlay(droid_overlay)
 		send_byjax(chassis.occupant,"exosuit.browser","\ref[src]",src.get_equip_info())
 	return
 

code/game/mecha/mecha.dm

@@ -259,7 +259,9 @@
 
 
 /obj/mecha/proc/check_for_support()
-	if(locate(/obj/structure/grille, orange(1, src)) || locate(/obj/structure/lattice, orange(1, src)) || locate(/turf/simulated, orange(1, src)) || locate(/turf/unsimulated, orange(1, src)))
+	var/list/things = orange(1, src)
+
+	if(locate(/obj/structure/grille in things) || locate(/obj/structure/lattice in things) || locate(/turf/simulated in things) || locate(/turf/unsimulated in things))
 		return 1
 	else
 		return 0
@@ -397,21 +399,26 @@
 /obj/mecha/relaymove(mob/user,direction)
 	if(user != src.occupant) //While not "realistic", this piece is player friendly.
 		if(istype(user,/mob/living/carbon/brain))
-			to_chat(user, "You try to move, but you are not the pilot! The exosuit doesn't respond.")
+			to_chat(user, "<span class='warning'>You try to move, but you are not the pilot! The exosuit doesn't respond.</span>")
 			return 0
 		user.forceMove(get_turf(src))
 		to_chat(user, "You climb out from [src]")
 		return 0
 	if(connected_port)
 		if(world.time - last_message > 20)
-			src.occupant_message("Unable to move while connected to the air system port")
+			src.occupant_message("<span class='warning'>Unable to move while connected to the air system port</span>")
 			last_message = world.time
 		return 0
 	if(state)
-		occupant_message("<font color='red'>Maintenance protocols in effect</font>")
+		occupant_message("<span class='warning'>Maintenance protocols in effect</span>")
 		return
 	return domove(direction)
 
+/obj/mecha/proc/can_ztravel()
+	for(var/obj/item/mecha_parts/mecha_equipment/tool/jetpack/jp in equipment)
+		return jp.equip_ready
+	return FALSE
+
 /obj/mecha/proc/domove(direction)
 
 	return call((proc_res["dyndomove"]||src), "dyndomove")(direction)
@@ -423,20 +430,51 @@
 		return 0
 	if(!has_charge(step_energy_drain))
 		return 0
+
 	var/move_result = 0
+
 	if(hasInternalDamage(MECHA_INT_CONTROL_LOST))
 		move_result = mechsteprand()
-	else if(src.dir!=direction)
+	//Up/down zmove
+	else if(direction & UP || direction & DOWN)
+		if(!can_ztravel())
+			occupant_message("<span class='warning'>Your vehicle lacks the capacity to move in that direction!</span>")
+			return FALSE
+
+		//We're using locs because some mecha are 2x2 turfs. So thicc!
+		var/result = TRUE
+
+		for(var/turf/T in locs)
+			if(!T.CanZPass(src,direction))
+				occupant_message("<span class='warning'>You can't move that direction from here!</span>")
+				result = FALSE
+				break
+			var/turf/dest = direction & UP ? GetAbove(T) : GetBelow(T)
+			if(!dest)
+				occupant_message("<span class='notice'>There is nothing of interest in this direction.</span>")
+				result = FALSE
+				break
+			if(!dest.CanZPass(src,direction))
+				occupant_message("<span class='warning'>There's something blocking your movement in that direction!</span>")
+				result = FALSE
+				break
+		if(result)
+			move_result = mechstep(direction)
+	//Turning
+	else if(src.dir != direction)
 		move_result = mechturn(direction)
+	//Stepping
 	else
 		move_result	= mechstep(direction)
+
+
 	if(move_result)
 		can_move = 0
 		use_power(step_energy_drain)
 		if(istype(src.loc, /turf/space))
 			if(!src.check_for_support())
 				src.pr_inertial_movement.start(list(src,direction))
-				src.log_message("Movement control lost. Inertial movement started.")
+				src.log_message("<span class='warning'>Movement control lost. Inertial movement started.</span>")
 		if(do_after(step_in))
 			can_move = 1
 		return 1

code/game/mecha/space/hoverpod.dm

@@ -26,11 +26,20 @@
 	max_universal_equip = 1
 	max_special_equip = 1
 
-/obj/mecha/working/hoverpod/New()
-	..()
+/obj/mecha/working/hoverpod/Initialize()
+	. = ..()
 	ion_trail = new /datum/effect/effect/system/ion_trail_follow()
 	ion_trail.set_up(src)
-	ion_trail.start()
+
+/obj/mecha/working/hoverpod/moved_inside(var/mob/living/carbon/human/H as mob)
+	. = ..(H)
+	if(.)
+		ion_trail.start()
+
+/obj/mecha/working/hoverpod/go_out()
+	. = ..()
+	if(!occupant)
+		ion_trail.stop()
 
 //Modified phazon code
 /obj/mecha/working/hoverpod/Topic(href, href_list)
@@ -52,6 +61,9 @@
 	output += ..()
 	return output
 
+/obj/mecha/working/hoverpod/can_ztravel()
+	return (stabilization_enabled && has_charge(step_energy_drain))
+
 // No space drifting
 /obj/mecha/working/hoverpod/check_for_support()
 	//does the hoverpod have enough charge left to stabilize itself?
@@ -106,7 +118,7 @@
 	max_special_equip = 1
 
 /obj/mecha/working/hoverpod/combatpod/Initialize()
-	..()
+	. = ..()
 	var/obj/item/mecha_parts/mecha_equipment/ME = new /obj/item/mecha_parts/mecha_equipment/weapon/energy/laser
 	ME.attach(src)
 	ME = new /obj/item/mecha_parts/mecha_equipment/weapon/ballistic/missile_rack/explosive
@@ -117,7 +129,7 @@
 	desc = "Who knew a tiny ball could fit three people?"
 
 /obj/mecha/working/hoverpod/shuttlepod/Initialize()
-	..()
+	. = ..()
 	var/obj/item/mecha_parts/mecha_equipment/ME = new /obj/item/mecha_parts/mecha_equipment/tool/passenger
 	ME.attach(src)
 	ME = new /obj/item/mecha_parts/mecha_equipment/tool/passenger

code/game/mecha/space/shuttle.dm

@@ -41,44 +41,30 @@
 	max_universal_equip = 1
 	max_special_equip = 1
 
-/obj/mecha/working/hoverpod/Initialize()
-	..()
-	ion_trail.stop()
-
-/obj/mecha/working/hoverpod/shuttlecraft/moved_inside(var/mob/living/carbon/human/H as mob)
-	. = ..(H)
-	if(.)
-		ion_trail.start()
-
-/obj/mecha/working/hoverpod/shuttlecraft/go_out()
-	. = ..()
-	if(!occupant)
-		ion_trail.stop()
-
 /obj/mecha/working/hoverpod/shuttlecraft/update_icon()
-	overlays.Cut()
+	cut_overlays()
 	..()
 
 	if(base_paint)
 		if(!base_paint_mask)
 			base_paint_mask = image(icon, "[initial_icon]-mask+base", src.layer + 1)
 		base_paint_mask.color = base_paint
-		overlays |= base_paint_mask
+		add_overlay(base_paint_mask)
 	if(front_paint)
 		if(!front_paint_mask)
 			front_paint_mask = image(icon, "[initial_icon]-mask+front", src.layer + 1)
 		front_paint_mask.color = front_paint
-		overlays |= front_paint_mask
+		add_overlay(front_paint_mask)
 	if(engine_paint)
 		if(!engine_paint_mask)
 			engine_paint_mask = image(icon, "[initial_icon]-mask+engine", src.layer + 1)
 		engine_paint_mask.color = engine_paint
-		overlays |= engine_paint_mask
+		add_overlay(engine_paint_mask)
 	if(central_paint)
 		if(!engine_paint_mask)
 			central_paint_mask = image(icon, "[initial_icon]-mask+central", src.layer + 2)
 		central_paint_mask.color = central_paint
-		overlays |= central_paint_mask
+		add_overlay(central_paint_mask)
 
 /obj/mecha/working/hoverpod/shuttlecraft/attackby(obj/item/weapon/W as obj, mob/user as mob)
 	if(istype(W,/obj/item/device/multitool) && state == 1)

code/modules/multiz/movement.dm

@@ -15,6 +15,10 @@
 /mob/proc/zMove(direction)
 	if(eyeobj)
 		return eyeobj.zMove(direction)
+	if(istype(loc,/obj/mecha))
+		var/obj/mecha/mech = loc
+		return mech.relaymove(src,direction)
+
 	if(!can_ztravel())
 		to_chat(src, "<span class='warning'>You lack means of travel in that direction.</span>")
 		return