-Optimized free looking more by using associated lists.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@5009 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/mob/living/silicon/ai/freelook/cameranet.dm

@@ -16,7 +16,7 @@ var/datum/cameranet/cameranet = new()
 	x &= ~0xf
 	y &= ~0xf
 	var/key = "[x],[y],[z]"
-	return key in chunks
+	return (chunks[key])
 
 // Returns the chunk in the x, y, z.
 // If there is no chunk, it creates a new chunk and returns that.
@@ -24,7 +24,7 @@ var/datum/cameranet/cameranet = new()
 	x &= ~0xf
 	y &= ~0xf
 	var/key = "[x],[y],[z]"
-	if(!(key in chunks))
+	if(!chunks[key])
 		chunks[key] = new /datum/camerachunk(null, x, y, z)
 
 	return chunks[key]
@@ -130,6 +130,6 @@ var/datum/cameranet/cameranet = new()
 	if(chunk)
 		if(chunk.changed)
 			chunk.hasChanged(1) // Update now, no matter if it's visible or not.
-		if(position in chunk.visibleTurfs)
+		if(chunk.visibleTurfs[position])
 			return 1
 	return 0

code/modules/mob/living/silicon/ai/freelook/chunk.dm

@@ -47,7 +47,7 @@
 // Called when a chunk has changed. I.E: A wall was deleted.
 
 /datum/camerachunk/proc/visibilityChanged(turf/loc)
-	if(!(loc in visibleTurfs))
+	if(!visibleTurfs[loc])
 		return
 	hasChanged()
 
@@ -86,7 +86,7 @@
 			continue
 
 		for(var/turf/t in c.can_see())
-			newVisibleTurfs += t
+			newVisibleTurfs[t] = t
 
 	// Removes turf that isn't in turfs.
 	newVisibleTurfs &= turfs
@@ -110,7 +110,7 @@
 
 	for(var/turf in visRemoved)
 		var/turf/t = turf
-		if(t in obscuredTurfs)
+		if(obscuredTurfs[t])
 			if(!t.obscured)
 				t.obscured = image('icons/effects/cameravis.dmi', t, "black", 15)
 
@@ -141,7 +141,7 @@
 
 	for(var/turf/t in range(10, locate(x + 8, y + 8, z)))
 		if(t.x >= x && t.y >= y && t.x < x + 16 && t.y < y + 16)
-			turfs += t
+			turfs[t] = t
 
 	for(var/camera in cameras)
 		var/obj/machinery/camera/c = camera
@@ -152,7 +152,7 @@
 			continue
 
 		for(var/turf/t in c.can_see())
-			visibleTurfs += t
+			visibleTurfs[t] = t
 
 	// Removes turf that isn't in turfs.
 	visibleTurfs &= turfs