final DM side fixes

Author: ShiftyRail

code/__HELPERS/math/vector/vector.dm

@@ -77,7 +77,7 @@
 	return new /_vector(x - B.x, y - B.y)
 
 /_vector/proc/operator*(var/mult)
-	if(istype(mult, /vector))
+	if(istype(mult, /_vector))
 		return dot(mult)
 	return new /_vector(x * mult, y * mult)
 

code/modules/mob/living/simple_animal/hostile/giant_spider/base_spider.dm

@@ -184,7 +184,7 @@
 	if(dark_plane)
 		if (master_plane)
 			master_plane.blend_mode = BLEND_ADD
-		dark_plane.alphas["spider"] = 15 // with the master_plane at BLEND_ADD, shadows appear well lit while actually well lit places appear blinding.
+		dark_plane.alphas["spider"] = 0 // with the master_plane at BLEND_ADD, shadows appear well lit while actually well lit places appear blinding.
 		client.color = list(
 			1,0,0,0,
 			0,0.2,0,0,

code/modules/mob/living/simple_animal/hostile/grue.dm

@@ -430,7 +430,7 @@
 	if(dark_plane)
 		if(master_plane)
 			master_plane.blend_mode = BLEND_ADD
-		dark_plane.alphas["grue"] = 15 // with the master_plane at BLEND_ADD, shadows appear well lit while actually well lit places appear blinding.
+		dark_plane.alphas["grue"] = 0 // with the master_plane at BLEND_ADD, shadows appear well lit while actually well lit places appear blinding.
 		client.color = list(
 				1,0,0,0,
 				-1,0.2,0.2,0,

code/modules/organs/internal/eyes/eyes.dm

@@ -10,6 +10,10 @@
 	var/list/colourmatrix = list()
 
 /datum/organ/internal/eyes/proc/update_perception(var/mob/living/carbon/human/M)
+	// Bad hack but in 516 any non-zero value of the dark plane will result in glitch for night vision googles
+	// Fix by reworking dark planes?
+	if (istype(M.glasses, /obj/item/clothing/glasses/scanner/night))
+		return
 	M.dark_plane.alphas["human"] = 5
 
 /datum/organ/internal/eyes/process() //Eye damage replaces the old eye_stat var.