emitter fix i guess

code/__HELPERS/vector.dm

@@ -45,23 +45,31 @@ return_location()
 /datum/plot_vector
 	var/turf/source
 	var/turf/target
+	var/cardinal_dir // in case we don't have a specific target
 	var/angle = 0	// direction of travel in degrees
 	var/loc_x = 0	// in pixels from the left edge of the map
 	var/loc_y = 0	// in pixels from the bottom edge of the map
 	var/loc_z = 0	// loc z is in world space coordinates (i.e. z level) - we don't care about measuring pixels for this
 	var/offset_x = 0	// distance to increment each step
 	var/offset_y = 0
 
-/datum/plot_vector/proc/setup(turf/S, turf/T, xo = 0, yo = 0, angle_offset=0)
+/datum/plot_vector/proc/setup(turf/S, turf/T, xo = 0, yo = 0, angle_offset=0, dir)
 	source = S
 	target = T
+	cardinal_dir = dir
 
 	if(!istype(source))
 		source = get_turf(source)
-	if(!istype(target))
+
+	if(!istype(source))
+		return
+
+	if(!target && cardinal_dir)
+		target = get_step(source, cardinal_dir)
+	else if(!istype(target))
 		target = get_turf(target)
 
-	if(!istype(source) || !istype(target))
+	if(!istype(target))
 		return
 
 	// convert coordinates to pixel space (default is 32px/turf, 8160px across for a size 255 map)

code/game/turfs/turf.dm

@@ -1,6 +1,6 @@
 /turf
 	icon = 'icons/turf/floors.dmi'
-	
+
 	// base turf luminosity, works against byond native darkness
 	// most likely you shouldn't touch it
 	// currently direcly used only by starlight/environment lighting
@@ -150,7 +150,7 @@
 	var/atom/priority_target = mover.original
 
 	// Then check priority target if it on the tile
-	if(!isturf(priority_target) && priority_target.loc == T)
+	if(priority_target && !isturf(priority_target) && priority_target.loc == T)
 		if(isliving(priority_target))
 			if(!mover.check_miss(priority_target))
 				alive_obstacle = priority_target

code/modules/power/singularity/emitter.dm

@@ -160,15 +160,6 @@
 			s.start()
 		A.set_dir(src.dir)
 		A.starting = get_turf(src)
-		switch(dir)
-			if(NORTH)
-				A.original = locate(x, y+1, z)
-			if(EAST)
-				A.original = locate(x+1, y, z)
-			if(WEST)
-				A.original = locate(x-1, y, z)
-			else // Any other
-				A.original = locate(x, y-1, z)
 		A.process()
 
 

code/modules/projectiles/projectile.dm

@@ -19,7 +19,7 @@
 	var/xo = null
 	var/current = null
 	var/obj/shot_from = null // the object which shot us
-	var/atom/original = null // the original target clicked
+	var/atom/original = null // the original target clicked, may not exist
 	var/turf/starting = null // the projectile's starting turf
 	var/list/permutated = list() // we've passed through these atoms, don't try to hit them again
 
@@ -255,7 +255,7 @@
 
 	// plot the initial trajectory
 	trajectory = new()
-	trajectory.setup(starting, original, pixel_x, pixel_y, angle_offset=offset)
+	trajectory.setup(starting, original, pixel_x, pixel_y, offset, dir)
 
 	// generate this now since all visual effects the projectile makes can use it
 	effect_transform = new()