function to improve entities moving on collisions and fixed accordingly

made math.round()
changed vector() and fixed accordingly

code/entities/arrow.lua

@@ -36,20 +36,30 @@ function Arrow:drawBackground()
 end
 
 function Arrow:doPhysics()
-	if not self:isCollidingAt(self.pos.x + self.vel.x, self.pos.y, LoadedObjects.Collisions) then
-		self.pos.x = self.pos.x + self.vel.x
-	else
-		self.stuck = true
-	end
-	if not self:isCollidingAt(self.pos.x, self.pos.y + self.vel.y, LoadedObjects.Collisions) then
-		self.pos.y = self.pos.y + self.vel.y
-	else
-		self.stuck = true
+	-- horizontal collision
+	self:moveX(
+		self.vel.x,
+		function()
+			self.stuck = true
+		end
+	)
+
+	if not self.stuck then
+		-- vertical collision
+		self:moveY(
+			self.vel.y,
+			function()
+				self.stuck = true
+			end
+		)
 	end
+
 	if self.stuck then
 		self.pos.x = self.pos.x + self.vel.x * (2/3)
 		self.pos.y = self.pos.y + self.vel.y * (2/3)
 		self.vel.x = 0
 		self.vel.y = 0
 	end
+
+	self:adjustLight()
 end