Merge pull request #11219 from PsiOmegaDelta/150929-HumanoidVision

Overhauls humanoid vision handling.

code/game/objects/items/weapons/grenades/flashbang.dm

@@ -49,7 +49,7 @@
 					ear_safety += 1
 
 //Flashing everyone
-		if(eye_safety < 1)
+		if(eye_safety < FLASH_PROTECTION_MODERATE)
 			flick("e_flash", M.flash)
 			M.Stun(2)
 			M.Weaken(10)

code/game/objects/items/weapons/grenades/spawnergrenade.dm

@@ -16,7 +16,7 @@
 			var/turf/T = get_turf(src)
 			playsound(T, 'sound/effects/phasein.ogg', 100, 1)
 			for(var/mob/living/carbon/human/M in viewers(T, null))
-				if(M:eyecheck() <= 0)
+				if(M.eyecheck() < FLASH_PROTECTION_MODERATE)
 					flick("e_flash", M.flash)
 
 			for(var/i=1, i<=deliveryamt, i++)

code/game/objects/items/weapons/tools.dm

@@ -337,18 +337,18 @@
 		if(!E)
 			return
 		switch(safety)
-			if(1)
+			if(FLASH_PROTECTION_MODERATE)
 				usr << "<span class='warning'>Your eyes sting a little.</span>"
 				E.damage += rand(1, 2)
 				if(E.damage > 12)
 					user.eye_blurry += rand(3,6)
-			if(0)
+			if(FLASH_PROTECTION_NONE)
 				usr << "<span class='warning'>Your eyes burn.</span>"
 				E.damage += rand(2, 4)
 				if(E.damage > 10)
 					E.damage += rand(4,10)
-			if(-1)
-				usr << "<span class='danger'>Your thermals intensify the welder's glow. Your eyes itch and burn severely.</span>"
+			if(FLASH_PROTECTION_REDUCED)
+				usr << "<span class='danger'>Your equipment intensify the welder's glow. Your eyes itch and burn severely.</span>"
 				user.eye_blurry += rand(12,20)
 				E.damage += rand(12, 16)
 		if(safety<2)