-tg- SpaceMove update

This commit updates the spacemove system to -tg-'s; All objects now drift
in space, not just mobs. A few hardcoded space checks have been replaced
with has_gravity(); So it applies to zero-G as well as space.

Spacepods no longer drift, because their snowflakey shitcode just doesn't
work. So they just move.

code/modules/projectiles/gun.dm

@@ -45,7 +45,7 @@
 	var/can_flashlight = 0
 	var/heavy_weapon = 0
 	var/randomspread = 0
-	
+
 	var/burst_size = 1
 
 	proc/ready_to_fire()
@@ -186,6 +186,7 @@
 					user.drop_item()
 					break
 
+		user.newtonian_move(get_dir(target, user))
 		update_icon()
 		if(user.hand)
 			user.update_inv_l_hand()

code/modules/projectiles/projectile.dm

@@ -89,8 +89,8 @@
 		return L.apply_effects(stun, weaken, paralyze, irradiate, slur, stutter, eyeblur, drowsy, agony, blocked, stamina, jitter)
 
 	proc/OnFired()	//if assigned, allows for code when the projectile gets fired
-		return 1		
-		
+		return 1
+
 	proc/check_fire(var/mob/living/target as mob, var/mob/living/user as mob)  //Checks if you can hit them or not.
 		if(!istype(target) || !istype(user))
 			return 0
@@ -137,7 +137,7 @@
 				var/mob/living/carbon/human/H = A
 				var/obj/item/organ/external/organ = H.get_organ(check_zone(def_zone))
 				if(isnull(organ))
-					return 
+					return
 			if(silenced)
 				playsound(loc, hitsound, 5, 1, -1)
 				M << "\red You've been shot in the [parse_zone(def_zone)] by the [src.name]!"
@@ -189,6 +189,11 @@
 			return 1
 
 
+	Process_Spacemove(var/movement_dir = 0)
+		return 1 //Bullets don't drift in space
+
+
+
 	process(var/setAngle)
 		if(setAngle) Angle = setAngle
 		if(!legacy)
@@ -332,7 +337,7 @@
 				M = locate() in get_step(src,target)
 				if(istype(M))
 					return 1
-					
+
 /proc/check_trajectory(atom/target as mob|obj, atom/firer as mob|obj, var/pass_flags=PASSTABLE|PASSGLASS|PASSGRILLE, flags=null)  //Checks if you can hit them or not.
 	if(!istype(target) || !istype(firer))
 		return 0
@@ -343,4 +348,4 @@
 	trace.pass_flags = pass_flags //And the pass flags to that of the real projectile...
 	var/output = trace.process() //Test it!
 	qdel(trace) //No need for it anymore
-	return output //Send it back to the gun!
+	return output //Send it back to the gun!