Uh @Moonvane , what if their angle are 45, will it be -0.5
3 Likes
Yes it will be 0.5 if the angles are 45 from each other and -0.5 if the angles are 135 degrees from eachother (135 is just the flipped version of 45)
2 Likes
I made a car, and I would like to detect next waypoints, the car moves by waypoints, if the next way point is to the right side of car, car should turn right
How do I detect if the waypoint is right side of the car
1 Like
Ok this actually doesn’t even need to use Dot, what you can do is just number the waypoints in order and then tween the car to the next waypoint.
1 Like
No like, the car moves through tween, but the thing is, the steering inside the car should also move like auto pilot, so I need to detect left or right the car moves in order to find which side its going
How do I do it?
1 Like
You can use dot product to find the angle, and cross product to find the direction left or right.
Ex from Sleitnick is AngleBetween signed:
local function AngleBetween(vectorA, vectorB)
return math.acos(math.clamp(vectorA:Dot(vectorB), -1, 1))
end
local function AngleBetweenSigned(vectorA, vectorB, axis)
local unsigned = AngleBetween(vectorA, vectorB)
local cross = vectorA:Cross(vectorB)
local sign = math.sign((axis.X * cross.X) + (axis.Y * cross.Y) + (axis.Z * cross.Z))
return (unsigned * sign)
end
3 Likes
It does not work either it gets the correct angle
2 Likes
Well that is the simplest explanation of cross and dot I have ever seen. Incredible.
Great job, best tutorial on the devforum by far.
1 Like
I appreciate it dude!!
This is enough chrar
1 Like
I really used to think these are complicated and for crazy good scripters who know what they are doing but turns out its simple as heck ty man have a great life!
1 Like
hi i was wondering if you knew how to find if the player is going down a slope, I need it to make the player go faster when they are sliding down a slope. this is what I have but what would go in the NORMAL part of the script
local incline = Vector3.new(1, 0, 0):Cross(Vector3.new(NORMAL)
if incline.magnitude == 0 then
incline = Vector3.new(1, 0, 0)
end
local angle = math.acos(Vector3.new(0, 1, 0):Dot(incline))
if angle > math.pi / 1.5 then
print("Angle")
Slide.Velocity = angle * Slide.Velocity * 1.15
else
print("No Angle")
Slide.Velocity = Slide.Velocity * 0.99
end
1 Like
Ok so this is a perfect example of somewhere where you can utilize Dot, and I love the way you did it in your code. Personally, I would just use a raycast from your HumanoidRootPart directly downward and then just use the normal from that.
(
local ray = workspace:Raycast(HRP.Position, Vector3.new(0, -hipheight - 1, 0), params)
local normal = ray and ray.Normal
)
1 Like
thank you so much i will try that
Its not working but im pretty sure this is my fault, as I’m very new to raycasting I think my variables are off.
local HumanoidRootPart = Character.PrimaryPart
local HipHeight = Humanoid.HipHeight
local Params = RaycastParams.new()
local ray = workspace:Raycast(HumanoidRootPart.Position, Vector3.new(0, -HipHeight - 1, 0), Params)
local normal = ray and ray.Normal
local incline = Vector3.new(1, 0, 0):Cross(Vector3.new(normal))
if incline.magnitude == 0 then
incline = Vector3.new(1, 0, 0)
end
local angle = math.acos(Vector3.new(0, 1, 0):Dot(incline))
if angle > math.pi / 1.5 then
print("Angle")
Slide.Velocity = angle * Slide.Velocity * 1.15
else
print("No Angle")
Slide.Velocity = Slide.Velocity * 0.95
end
1 Like
Ok yes do for the raycast, you will want to include an ignorelist. Do it like this:
local params = RaycastParams.new()
params.FilterDescendantsInstances = {player.Character}
params.FilterType = Enum.RaycastFilterType.Blacklist
ok thanks im trying it out now
ok so I dont think its working but my code is all messed up and I was wondering if you could help. basically I’m running a while true do lap but I couldn’t get the loop to stop when the player stoped sliding so I added a spawn() function hoping I would be able to stop it but I couldn’t and it kept running only difference is now the rest of my code is running with the spawn function still going but I want it to stop when the player stops sliding any tips if I should use a different loop or something to stop it. here’s the code:
local function OnHoldingDown(Action)
print(Variables.Sprinting)
if Module.HoldDownEnabled then
if not Variables.Overheated and Variables.ActuallyEquipped and Variables.Enabled and Variables.Sprinting == true then
Character.Humanoid.WalkSpeed = 0local Slide = Instance.new("BodyVelocity") if Action == "Go" and not HoldingDownCooldown then ReplicatedStorage.Modules.ViewmodelHandler.Sliding.Value = true HoldingDownCooldown = true Variables.HoldDown = true --if Animations.HoldDownAnim then -- Animations.HoldDownAnim:Play(nil, nil, Module.HoldDownAnimationSpeed) --end --if VMAnimations.VMHoldDownAnim then -- VMAnimations.VMHoldDownAnim:Play(nil, nil, Module.VMHoldDownAnimationSpeed) --end Humanoid.HipHeight = 0.5 Slide.MaxForce = Vector3.new(1,0,1) * 45000 Slide.Velocity = Character.HumanoidRootPart.CFrame.lookVector * 50 Slide.Parent = Character.HumanoidRootPart spawn(function() while true do wait(0.1) if Variables.Sprinting == true then local HumanoidRootPart = Character.PrimaryPart local HipHeight = Humanoid.HipHeight local Params = RaycastParams.new() Params.FilterDescendantsInstances = {Character} Params.FilterType = Enum.RaycastFilterType.Blacklist local ray = workspace:Raycast(HumanoidRootPart.Position, Vector3.new(0, -HipHeight - 1, 0), Params) local normal = ray and ray.Normal local incline = Vector3.new(1, 0, 0):Cross(Vector3.new(normal)) if incline.magnitude == 0 then incline = Vector3.new(1, 0, 0) end local angle = math.acos(Vector3.new(0, 1, 0):Dot(incline)) if angle > math.pi / 1.5 then print("Angle") Slide.Velocity = angle * Slide.Velocity * 1.5 else print("No Angle") Slide.Velocity = Slide.Velocity * 0.8 end else repeat wait(0.1) until Variables.Sprinting == true end end end) else Character.Humanoid.WalkSpeed = 16 Variables.HoldDown = false --if Animations.IdleAnim then -- Animations.IdleAnim:Play(nil, nil, Module.IdleAnimationSpeed) --end --if VMAnimations.VMIdleAnim then -- VMAnimations.VMIdleAnim:Play(nil, nil, Module.VMIdleAnimationSpeed) --end --if Animations.HoldDownAnim and Animations.HoldDownAnim.IsPlaying then -- Animations.HoldDownAnim:Stop() --end --if VMAnimations.VMHoldDownAnim and VMAnimations.VMHoldDownAnim.IsPlaying then -- VMAnimations.VMHoldDownAnim:Stop() --end Humanoid.HipHeight = 2 Slide:Destroy() Character.PrimaryPart.Velocity = Vector3.new(0,0,0) ReplicatedStorage.Modules.ViewmodelHandler.Sliding.Value = false wait(0.5) HoldingDownCooldown = false end endend
1 Like
I actually have a trick I use for something like this. I do something like this:
function executeSlide()
local localFunctionId = os.clock()
globalFunctionId = localFunctionId
while wait(0.1) do
if localFunctionId ~= globalFunctionId then
break
end
dostuff()
end
end
-- and in a different part of the script when the player stops sliding, do this:
globalFunctionId = os.clock()
thanks but what is GlobalFunctionId it is underlining it like it doesn’t recognise it
TYSM I WORKED but that problem I had at the start still remains its not detecting the Slope or Angle here’s the script one more time:
Script Here
local function OnHoldingDown(Action)
print(Variables.Sprinting)
if Module.HoldDownEnabled then
if not Variables.Overheated and Variables.ActuallyEquipped and Variables.Enabled and Variables.Sprinting == true then
local Slide = Instance.new("BodyVelocity")
if Action == "Go" and not HoldingDownCooldown then
Character.Humanoid.WalkSpeed = 0
ReplicatedStorage.Modules.ViewmodelHandler.Sliding.Value = true
HoldingDownCooldown = true
Variables.HoldDown = true
--if Animations.HoldDownAnim then
-- Animations.HoldDownAnim:Play(nil, nil, Module.HoldDownAnimationSpeed)
--end
--if VMAnimations.VMHoldDownAnim then
-- VMAnimations.VMHoldDownAnim:Play(nil, nil, Module.VMHoldDownAnimationSpeed)
--end
Humanoid.HipHeight = 0.5
Slide.MaxForce = Vector3.new(1,0,1) * 45000
Slide.Velocity = Character.HumanoidRootPart.CFrame.lookVector * 50
Slide.Parent = Character.HumanoidRootPart
GlobalFunctionId = localFunctionId
spawn(function()
while wait(0.1) do
if localFunctionId ~= GlobalFunctionId then
Slide.Velocity = Slide.Velocity * 0
if Slide then
Slide:Destroy()
end
break
end
if Variables.Sprinting == true then
local HumanoidRootPart = Character.PrimaryPart
local HipHeight = Humanoid.HipHeight
local Params = RaycastParams.new()
Params.FilterDescendantsInstances = {Character}
Params.FilterType = Enum.RaycastFilterType.Blacklist
local ray = workspace:Raycast(HumanoidRootPart.Position, Vector3.new(0, -HipHeight - 1, 0), Params)
local normal = ray and ray.Normal
local incline = Vector3.new(1, 0, 0):Cross(Vector3.new(normal))
if incline.magnitude == 0 then
incline = Vector3.new(1, 0, 0)
end
local angle = math.acos(Vector3.new(0, 1, 0):Dot(incline))
if angle > math.pi / 1.5 then
print("Angle")
Slide.Velocity = angle * Slide.Velocity * 1.1
else
print("No Angle")
Slide.Velocity = Slide.Velocity * 0.9
end
else
repeat wait(0.1) until Variables.Sprinting == true
end
end
end)
else
GlobalFunctionId = os.clock()
Character.Humanoid.WalkSpeed = 16
Variables.HoldDown = false
--if Animations.IdleAnim then
-- Animations.IdleAnim:Play(nil, nil, Module.IdleAnimationSpeed)
--end
--if VMAnimations.VMIdleAnim then
-- VMAnimations.VMIdleAnim:Play(nil, nil, Module.VMIdleAnimationSpeed)
--end
--if Animations.HoldDownAnim and Animations.HoldDownAnim.IsPlaying then
-- Animations.HoldDownAnim:Stop()
--end
--if VMAnimations.VMHoldDownAnim and VMAnimations.VMHoldDownAnim.IsPlaying then
-- VMAnimations.VMHoldDownAnim:Stop()
--end
Humanoid.HipHeight = 2
Slide:Destroy()
Character.PrimaryPart.Velocity = Vector3.new(0,0,0)
ReplicatedStorage.Modules.ViewmodelHandler.Sliding.Value = false
wait(0.5)
HoldingDownCooldown = false
end
end
end
end