Hello! I am trying to make a zipline for my game, but the character moves slower when it reaches a point.
Trying to lower the Dampening property and rise the Power property this happens:
Why does this happen and is there any way to fix it?
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The issue isn’t the BodyPosition, but the bezier curve itself
Since bezier curves don’t have equal distances between each bezier point, tighter curves are gonna have a slower speed since all those points in the curve are so close to each other
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Ah, I see, is there any way to fix it though?
1 Like
There’s a couple ways to do it for ex:
You can get the current bezier point and the next bezier point and get the distance
local distance = (currentPoint - nextPoint).Magnitude
And then after you can divide that distance by how fast you want to travel
local distance = (currentPoint - nextPoint).Magnitude
local speed = distance / 40
There’s also another way called arc length parameterization but I won’t go into it since it’s a bit more complicated and involves a lot of math
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I just realized I forgot the script! Here it is:
local speed = 0
local posPoints = {}
for i=1, #points do
if i > 1 then
speed += (points[i - 1].Position - points[i].Position).Magnitude * 1.3
end
table.insert(posPoints, points[i].Position)
end
if rope:FindFirstChild("Settings") then
if rope.Settings:FindFirstChild("ExtraSpeed") then
speed = speed / rope.Settings.ExtraSpeed.Value
end
end
coroutine.wrap(EnableCamera)()
local inc = (1 /(speed))
local this
local Distance
for t = 0, 1 - inc, inc do
local pos = Bezier.GetBezierPoint(t, unpack(posPoints))
local nextPos = Bezier.GetBezierPoint(t + inc, unpack(posPoints))
Distance = (pos - nextPos).magnitude
this = CFrame.lookAt(pos, nextPos, Vector3.new(0, 1, 0)) * CFrame.new(0, -2, Distance / -2)
bodyPos.Position = this.Position
bodyGy.CFrame = this * CFrame.new(0, -2, -Distance / 2)
part.CFrame = this
task.wait()
end
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the local speed is part of it, just dont know why it looks like that
That’s some code but if I were you, I would put this inside a Heartbeat loop
Here’s how I did mine:
bezier_test.rbxl (54.5 KB)
3 Likes
FYI, that isn’t the full script. I will send the full script tomorrow and I hope you reply. 
1 Like
Full scripts:
_zipline:
local plr = game.Players.LocalPlayer
local Bezier = require(game.ReplicatedStorage.GameScripts.Ziplines.Bezier)
local zipAnim = game.ReplicatedStorage.AnimationStorage.Swing
local travelling = false
local D = 0
function DisableSparkles()
local sparkles = plr.Character["Right Arm"].Sparkles
sparkles.Enabled = false
wait(4)
sparkles:Destroy()
end
function DisableBodyStuff()
local bodyPos = plr.Character.HumanoidRootPart.BodyPosition
local bodyGy = plr.Character.HumanoidRootPart.BodyGyro
wait(0.04)
bodyPos:Destroy()
bodyGy:Destroy()
for i, v in pairs(plr.Character:GetDescendants()) do
if v:IsA("Part") and v.Name ~= "HumanoidRootPart" then
v.CollisionGroup = "PlayerChars"
end
end
if game.ReplicatedStorage.ClientConfig.ZiplineCameraEnabled.Value then
workspace.CurrentCamera.CameraSubject = plr.Character.Humanoid
workspace.CurrentCamera.CameraType = Enum.CameraType.Custom
plr.CameraMaxZoomDistance = 400
plr.CameraMinZoomDistance = 0.5
end
end
function EnableCamera()
if game.ReplicatedStorage.ClientConfig.ZiplineCameraEnabled.Value then
plr.CameraMinZoomDistance = 10
plr.CameraMaxZoomDistance = 10
workspace.CurrentCamera.CameraSubject = plr.Character.Humanoid
workspace.CurrentCamera.CameraType = Enum.CameraType.Watch
end
end
function travelPoints(points, rope)
travelling = true
local humAnim = plr.Character.Humanoid:LoadAnimation(zipAnim)
local part = Instance.new("Part", plr.Character)
part.Anchored = true
part.CanCollide = false
part.Transparency = 1
local tag = Instance.new("IntValue", plr.Character)
tag.Name = "RidingZipline"
local sparkles = Instance.new("Sparkles", plr.Character["Right Arm"])
sparkles.SparkleColor = Color3.fromRGB(255, 179, 0)
local bodyPos = Instance.new("BodyPosition", plr.Character.HumanoidRootPart)
bodyPos.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
bodyPos.P = 50000000
bodyPos.D = 0
local bodyGy = Instance.new("BodyGyro", plr.Character.HumanoidRootPart)
bodyGy.MaxTorque = Vector3.new(math.huge, math.huge, math.huge)
bodyGy.P = 50000
bodyGy.D = 50
humAnim:Play()
game.SoundService.ZiplineOn.TimePosition = 0.5
game.SoundService.ZiplineOn.Playing = true
game.SoundService.Zipline.Playing = true
local speed = 0
local posPoints = {}
for i=1, #points do
if i > 1 then
speed += (points[i - 1].Position - points[i].Position).Magnitude * 1.3
end
table.insert(posPoints, points[i].Position)
end
if rope:FindFirstChild("Settings") then
if rope.Settings:FindFirstChild("ExtraSpeed") then
speed = speed / rope.Settings.ExtraSpeed.Value
end
end
coroutine.wrap(EnableCamera)()
local inc = (1 /(speed))
local this
local Distance
for t = 0, 1 - inc, inc do
local pos = Bezier.GetBezierPoint(t, unpack(posPoints))
local nextPos = Bezier.GetBezierPoint(t + inc, unpack(posPoints))
Distance = (pos - nextPos).magnitude
this = CFrame.lookAt(pos, nextPos, Vector3.new(0, 1, 0)) * CFrame.new(0, -2, Distance / -2)
bodyPos.Position = this.Position
bodyGy.CFrame = this * CFrame.new(0, -2, -Distance / 2)
part.CFrame = this
task.wait()
end
bodyPos.Position = this.Position
bodyGy.CFrame = this * CFrame.new(0, -2, -Distance / 2)
coroutine.wrap(DisableBodyStuff)()
part:Destroy()
tag:Destroy()
coroutine.wrap(DisableSparkles)()
game.SoundService.Zipline.Playing = false
game.SoundService.ZiplineOff.TimePosition = 0.5
game.SoundService.ZiplineOff.Playing = true
humAnim:Stop()
travelling = false
end
function sort(tab)
local finished = {}
for i=1, #tab do
for x=1, #tab do
if tonumber(string.sub(tab[x].Name, 6, #tab[x].Name)) == i then
finished[i] = tab[x]
end
end
end
return finished
end
for _,i in ipairs(plr.Character:GetChildren()) do
if i:IsA("BasePart") then
i.Touched:Connect(function(p)
if p.Name == "StartPoint" and p.Parent.Name == "_Rope" and not travelling then
local points = {}
for _,x in ipairs(p.Parent:GetChildren()) do
if string.find(x.Name, "Point") then
table.insert(points, x)
end
end
for i, v in pairs(plr.Character:GetDescendants()) do
if v:IsA("Part") and v.Name ~= "HumanoidRootPart" then
v.CanCollide = false
v.CollisionGroup = "Zipline"
end
end
points = sort(points)
travelPoints(points, p.Parent)
end
end)
end
end
Bezier:
local module = {}
function Lerp(P0, P1, T)
return (1 - T) * P0 + T * P1
end
function module.GetBezierPoint(T, ...)
local Points = {...}
while (#Points > 1) do
for i = 1, #Points - 1 do
Points[i] = Lerp(Points[i], Points[i + 1], T)
end
Points[#Points] = nil
end
return Points[1]
end
function createPart(Point, NextPoint, Parent)
local ZiplinePart = Instance.new("Part")
ZiplinePart.Anchored = true
ZiplinePart.Size = Vector3.new(0.25, 0.25, (Point - NextPoint).Magnitude)
ZiplinePart.CFrame = CFrame.lookAt(Point, NextPoint, Vector3.new(0, 1, 0)) * CFrame.new(0, 0, ZiplinePart.Size.Z / -2)
ZiplinePart.Material = "Fabric"
ZiplinePart.Color = Color3.new(0, 0, 0)
ZiplinePart.Parent = Parent
ZiplinePart.CanCollide = false
return ZiplinePart
end
function module.new(par, ...)
local points = {...}
local posPoints = {}
local speed = 0
for i=1, #points do
table.insert(posPoints, points[i].Position)
if i > 1 then
speed += (points[i - 1].Position - points[i].Position).Magnitude * 1.3
end
end
local inc = (1 / 40)
for i = 0, 1.0025 - inc, inc do
local Point = module.GetBezierPoint(i, unpack(posPoints))
local NextPoint = module.GetBezierPoint(i + inc, unpack(posPoints))
createPart(Point, NextPoint, par)
end
end
return module
I tried switching to this one and it works so much better! Thank you so much for helping me!
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