Raycasting not detecting player

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#1

I am trying to create an enemy AI that can see the player with 360 degree vision.
Currently he only detects the player if he is in front of him.
I’m not too sure how raycasts work, so I’m not sure why this is happening. I thought orientation does not matter when raycasting, but I guess it does. I attached a video below showing what the AI does. Thanks for the help.

This loop constantly runs, controlling the AI:

local target, player = findTarget()

			if target then
				target = target + (ai.HumanoidRootPart.CFrame.LookVector*5)
				local distance = (ai.HumanoidRootPart.Position - target)
				local lookVector = ai.HumanoidRootPart.CFrame.LookVector
				local dotProduct = distance.Unit:Dot(lookVector)
				local raycastResult = workspace:Raycast(ai.HumanoidRootPart.Position, target - ai.HumanoidRootPart.Position,raycastParams);wait()
				print(raycastResult)

				if raycastResult then
					local rayPart = Instance.new("Part", workspace)
					rayPart.Anchored = true
					rayPart.CanCollide = false
					rayPart.Color = Color3.fromRGB(255,0,0)
					rayPart.Name = "RayPart"
					
					rayPart.Size = Vector3.new(1, 1, (ai.HumanoidRootPart.Position - raycastResult.Position).Magnitude)
					rayPart.CFrame = CFrame.new((ai.HumanoidRootPart.Position + raycastResult.Position)/2, raycastResult.Position)
				end
				if raycastResult --[[ and dotProduct < maxVector]] then
					print(raycastResult.Instance.Parent)
					if raycastResult.Instance.Parent == player.Character then
						ai.Humanoid:MoveTo(target)
						task.wait()
					elseif player.Character.Humanoid:LoadAnimation(player.Character.Crouching:WaitForChild("Crouching")).IsPlaying then
						Path:Run(target)
					end
				else
					task.wait()
				end
			else
				task.wait()
			end

ai test.wmv (1.2 MB)