Polydraw

local setupPart = function(part)
    part.Anchored = true
    part.FormFactor = 'Custom'
    part.CanCollide = true
    part.BrickColor = BrickColor.new()
    part.TopSurface = 'Smooth'
    part.BottomSurface = 'Smooth'
    local m = Instance.new("SpecialMesh",part)
    m.MeshType = "Wedge"
    m.Scale = Vector3.new(0,1,1)
    return part
end
function CFrameFromTopBack(at, top, back)
    local right = top:Cross(back)
    return CFrame.new(at.x, at.y, at.z, right.x, top.x, back.x, right.y, top.y, back.y, right.z, top.z, back.z)
end

function CreateTriangle(parent, a, b, c)
    local this = {}
    local mPart1 = Instance.new('WedgePart')
    setupPart(mPart1)
    local mPart2 = Instance.new('WedgePart')
    setupPart(mPart2)
    function this:Set(a, b, c)
        local ab, bc, ca = b-a, c-b, a-c
        local abm, bcm, cam = ab.magnitude, bc.magnitude, ca.magnitude
        local edg1 = math.abs(0.5 + ca:Dot(ab)/(abm*abm))
        local edg2 = math.abs(0.5 + ab:Dot(bc)/(bcm*bcm))
        local edg3 = math.abs(0.5 + bc:Dot(ca)/(cam*cam))
        if edg1 < edg2 then
            if edg1 < edg3 then
                a, b, c = c, a, b ab, bc, ca = ca, ab, bc abm = cam
            elseif edg2 < edg3 then
                a, b, c = b, c, a
                ab, bc, ca = bc, ca, ab
                abm = bcm
            else
                a, b, c = c, a, b ab, bc, ca = ca, ab, bc abm = cam
            end
        end
        local len1 = -ca:Dot(ab)/abm
        local len2 = abm - len1
        local width = (ca + ab.unit*len1).magnitude
        local maincf = CFrameFromTopBack(a, ab:Cross(bc).unit, -ab.unit)
        if len1 > 0.2 then
            mPart1.Parent = parent mPart1.Size = Vector3.new(0.2, width, len1)
            mPart1.CFrame = maincf*CFrame.Angles(math.pi,0,math.pi/2)*CFrame.new(0,width/2,len1/2)
        else
            mPart1.Parent = nil
        end
        if len2 > 0.2 then
            mPart2.Parent = parent
            mPart2.Size = Vector3.new(0.2, width, len2)
            mPart2.CFrame = maincf*CFrame.Angles(math.pi,math.pi,-math.pi/2)*CFrame.new(0,width/2,-len1 - len2/2)
        else
            mPart2.Parent = nil
        end
    end
    function this:SetProperty(prop, value)
        mPart1[prop] = value
        mPart2[prop] = value
    end
    this:Set(a, b, c)
    function this:Destroy()
        mPart1:Destroy()
        mPart2:Destroy()
    end
    return this
end
local t = {}
local vertices = {}
Mouse = game.Players.LocalPlayer:GetMouse()
Player = game.Players.LocalPlayer
local N = Instance.new("Part",Player.Character)
N.Anchored = true
N.FormFactor = "Custom"
N.Size = Vector3.new(0.4,0.4,0.4)
N.TopSurface = "Smooth"
N.BottomSurface = "Smooth"
TarP = Mouse.Hit.p
Off = CFrame.new(0,0,0)
X,Y,Z = 0,0,0
On = true
Mouse.Button1Down:connect(function()
    if On then
        local P = N:clone()
        P.Parent = Player.Character
        P.CFrame = CFrame.new(TarP)
        table.insert(t,{Part=P,CF=TarP})
        if #t >= 3 then
            local n = {}
            for i,v in pairs(t) do
                table.insert(vertices,v.CF)
                n[i]=v.CF
                v.Part:Destroy()
            end
            CreateTriangle(Workspace,unpack(n))
            t = {}
        end
    end
end)
Mouse.Move:connect(function()
    if On then
        local p = Mouse.Hit.p
        local pos = p
        for i,v in pairs(vertices) do
            if (p-v).magnitude < 0.5 then
                pos = v
            end
        end
        TarP = (CFrame.new(pos)*CFrame.Angles(math.rad(X),math.rad(Y),math.rad(Z))*Off).p
    end
end)
Mouse.KeyDown:connect(function(k)

    if k == "r" then -- up
        Off = Off+Vector3.new(0,1,0)
    end
    if k == "f" then -- down
        Off = Off-Vector3.new(0,1,0)
    end
    if k == "m" then
        X,Y,Z = 0,0,0
        Off = CFrame.new(0,0,0)
    end
    if k == "z" then
        X = X+10
    end
    if k == "x" then --|Rotation
        Z = Z+10
    end
    --[[if k == "c" then
        Z = Z+10
    end]]
    if k == "q" then
        On = not On
    end
end)
game:GetService("RunService").RenderStepped:connect(function()
    N.CFrame = CFrame.new(TarP)
    N.Parent = On and Player.Character or nil
end)