Need help Moving bezier curves

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#1

so i need some help with bezier curves. I just learned them like 20 minutes ago so I’d figure I’d try and experiment with them, so i tried doing a test to make a barrage similar to like yba or some other games, but I noticed that the parts are kind of not moving with the player.

local function lerp(a, b, t)
    --a value is start position
    --b value is end position
    --t value is time

    return a + (b-a) * t

end






game.Players.PlayerAdded:Connect(function(player)
    player.CharacterAdded:Connect(function(character)

        local finishpoint = Instance.new("Part")
        finishpoint.Name = "FinishPoint"
        finishpoint.Parent = character
        finishpoint.CanCollide = false
        finishpoint.Anchored = true
        finishpoint.Size = Vector3.new(0.5,0.5,0.5)
        
        local curve = Instance.new("Part")
        curve.Name = "CurvePoint"
        curve.Parent = character
        curve.CanCollide = false
        curve.Anchored = true
        curve.Size = Vector3.new(0.5,0.5,0.5)
        
        
        task.spawn(function()
            while task.wait(0.01) do
                finishpoint.CFrame = character.Torso.CFrame * CFrame.new(0,0,-5)
                curve.CFrame = character.Torso.CFrame * CFrame.new(3,0,-2.5)
            end        
        end)
    
       
    
        
        local x = 0
        
        repeat
            local startpoint = character.Torso.Position
            local endpoint = character.Torso.CFrame * CFrame.new(0,0,-5)
            local endp = endpoint.Position
            local curvepoint  = character.Torso.CFrame * CFrame.new(3,0,-2.5)
            local curvep = curvepoint.Position
            
            x += 1
            local LeftArm = character["Left Arm"]:Clone()
            LeftArm.Name = "LeftArmBarragePart"
            LeftArm.Parent = character
            LeftArm.CanCollide = false
            LeftArm.Anchored = true
            
            for i = 0, 100, 1 do
                local t = i/100

                local l1 = lerp(startpoint, curvep, t)
                local l2 = lerp(curvep, endp, t)

                --lerp1.Position = l1
                --lerp2.Position = l2

                local quad = lerp(l1, l2, t)

                LeftArm.Position = quad
                task.wait(0.01)
            end
            
        until x == 100
              
    end)
end)

currently my script just defines the end point of the curve, but it doesn’t change as the player moves. So that has me wondering if its possible to move a bezier curve as a lerp is playing so that the parts that are lerping actually move with the curve. Is this possible?

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#2

what u can do is make the start and end point parts in the desired position (ie: 2 studs in front of the plr) and weld constraint it to the character so it will move with the character without needing to update it

#3

You can use this module or there’s a roblox sword named: “Sword Of Light” and it used a Beizer Curve module.You should check it out if you don’t want to sacrifice your brain for a beizer script!
Module:The only Bézier module you will ever need

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