I was trying to create an NPC that utilizes raycasts to detect the presence of a player. However, the raycasts seem not to register, except at certain angles and distances.
local function lookForPlayer()
--Character is the NPC, not the player
local Players = game.Players:GetPlayers()
for i, Player in pairs(Players) do
if Player.Character then
local RaycastParameters = RaycastParams.new()
-- RaycastParameters.FilterType = Enum.RaycastFilterType.Exclude
-- RaycastParameters.FilterDescendantsInstances = {character}
local Raycast = workspace:Raycast(character.Head.Position,Player.Character.Head.Position,RaycastParameters)
if Raycast then
local RigHeadPos = character.Head.Position
local PlrHeadPos = Player.Character.Head.Position
print(math.deg(math.atan2(PlrHeadPos.Y-RigHeadPos.Y,PlrHeadPos.X-RigHeadPos.X))-character.Head.Orientation.Y)
character.Head.Color = Color3.new(1,0,0)
else
character.Head.Color = Color3.new(0,0,0)
end
end
end
end
game["Run Service"].Heartbeat:Connect(lookForPlayer)
There should be raycasts registering whenever ANYTHING is hit, (which is why I disabled the exclusion checks), but still it returns nil.
The second argument in workspace:Raycast() is a direction vector from the first argument, not a target position. All you need to do is subtract your start position from your target position to get the direction vector, like this:
local function lookForPlayer()
--Character is the NPC, not the player
local Players = game.Players:GetPlayers()
for i, Player in pairs(Players) do
if Player.Character then
local RaycastParameters = RaycastParams.new()
-- RaycastParameters.FilterType = Enum.RaycastFilterType.Exclude
-- RaycastParameters.FilterDescendantsInstances = {character}
local RigHeadPos = character.Head.Position
local PlrHeadPos = Player.Character.Head.Position
local Raycast = workspace:Raycast(RigHeadPos, PlrHeadPos - RigHeadPos, RaycastParameters)
if Raycast then
print(math.deg(math.atan2(PlrHeadPos.Y-RigHeadPos.Y,PlrHeadPos.X-RigHeadPos.X))-character.Head.Orientation.Y)
character.Head.Color = Color3.new(1,0,0)
else
character.Head.Color = Color3.new(0,0,0)
end
end
end
end
game["Run Service"].Heartbeat:Connect(lookForPlayer)
If we assume the OP is trying to cast from a head to another head, then actually yes, that is everything. You’re using the displacement between two heads as the direction for the raycast. But you should definitely increase that vector by just a bit for tolerance purposes. Normalizing the direction shouldn’t be necessary
workspace:Raycast(origin, (destination - origin)*1.1, RCP) --the 1.1 is for tolerance
That’s true, but either option works. In his case, if he wants to detect how far the player is from the NPC, he can use your option or mine. If he uses my option, the raycast should return nil or some object not equal to the NPC if the player isn’t close enough to the NPC
