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How do I make parts act like they're welded without using welds? [closed]

Asked by

4 years ago

So I'm trying to make some welded parts move inside of a ViewportFrame, but i realised welds don't work outside of workspace, how would I use CFrames to make them act like they're welded?

Closed as off-topic by JesseSong

This question has been closed by our community as being off-topic from ROBLOX Lua Scripting.

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1 answer

Answered by

TGazza 1336

4 years ago

Edited 4 years ago

Not sure if this is what your asking but i have made a camera system that uses a ViewportFrame. the script simply clones what the camera sees and uses the viewportframe as a screen.

the code is as follows: It also might give you some idea on how to move something without using welds! :)

Code(LocalScript):

001local function CreateRegion3FromLocAndSize(PartBase,Offset, Size)
002    local SizeOffset = Size/2
003    local CF = PartBase.CFrame*Offset
004    local Point1 = (CF - SizeOffset).p
005    local Point2 = (CF + SizeOffset).p
006    return Region3.new(Point1, Point2)
007end
008 
009local RegionSize = Vector3.new(250,250,250)
010local Camera = workspace.CurrentCamera
011local Player = script.Parent.Parent
012local PlayerGui = Player.PlayerGui 
013 
014local ScreenGui = (function()
015    local Screen_Name = "Camera View Port"
016    local S = PlayerGui:FindFirstChild(Screen_Name)
017    if(S == nil) then
018        S = Instance.new("ScreenGui",PlayerGui)
019        S.Name = Screen_Name
020    end
021    return S 
022end)()
023 
024local Screen = Instance.new("ViewportFrame", ScreenGui)
025Screen.Size = UDim2.new(0, 250, 0, 250)
026Screen.Position = UDim2.new(0,0,1,-250)
027Screen.BackgroundColor3 = Color3.new(1, 1, 1)
028 
029local guiCamera = Instance.new("Camera", Screen)
030Screen.CurrentCamera = guiCamera
031local CameraOffset = CFrame.new(0,0,0)
032 
033local ScreenBits = {}
034 
035local function IsPartInRegion3(Part,Region3Space)
036    local R3Size = Region3Space.Size
037    local X1 = Region3Space.CFrame.X - (R3Size.X/2)
038    local Y1 = Region3Space.CFrame.Y - (R3Size.Y/2)
039    local Z1 = Region3Space.CFrame.Z - (R3Size.Z/2)
040    local X2 = Region3Space.CFrame.X + (R3Size.X/2)
041    local Y2 = Region3Space.CFrame.Y + (R3Size.Y/2)
042    local Z2 = Region3Space.CFrame.Z + (R3Size.Z/2)
043    local LowerCorner = Vector3.new(X1,Y1,Z1)
044    local UpperCorner = Vector3.new(X2,Y2,Z2)
045    return Part.Position.X > LowerCorner.X 
046    and Part.Position.X < UpperCorner.X 
047    and Part.Position.Y > LowerCorner.Y 
048    and Part.Position.Y < UpperCorner.Y 
049    and Part.Position.Z > LowerCorner.Z 
050    and Part.Position.Z < UpperCorner.Z
051end
052local function isInView(Camera,Part)
053 
054    local function toRot(CF)
055        local sx, sy, sz, m00, m01, m02, m10, m11, m12, m20, m21, m22 = CF:components()
056        local Y = math.atan2(m02, m22)*(180/math.pi)+180
057        local X = math.asin(-m12)*(180/math.pi)+180
058        local Z = math.atan2(m10, m11)*(180/math.pi)+180
059        return Vector3.new(X,Y,Z)
060    end
061    local DirCF = CFrame.new(Camera.CFrame.p, Part.Position)
062 
063 
064    local Rot = toRot(DirCF)
065    local ARot = toRot(DirCF*CFrame.Angles(0,math.rad(180),0))
066    local MyRot = toRot(Camera.CFrame)
067    local Aim = (ARot.Y)-(MyRot.Y)
068    --local b_IsBehindME = math.abs(Aim) > 90
069    local b_CanISeeIt = math.abs(Aim) > Camera.FieldOfView
070    --print("Can I SEE [",Part,"] = ",b_CanISeeIt)
071    return b_CanISeeIt
072end
073 
074 
075 
076local RS = game:GetService("RunService")
077RS.Heartbeat:connect(function()
078    local Offset = CFrame.new(0,0,-15)
079    local R3  = CreateRegion3FromLocAndSize(Camera,Offset, RegionSize)
080 
081    for OPart,CPart in pairs(ScreenBits) do
082        local bisInView = isInView(Camera,OPart)
083        local isInR3 = IsPartInRegion3(OPart,R3)
084        if(not isInR3 or OPart:IsDescendantOf(workspace) == false) then
085            ScreenBits[OPart] = nil
086            CPart:Destroy()
087        elseif(not bisInView) then
088            ScreenBits[OPart] = nil
089            CPart:Destroy()
090        end
091 
092    end
093    guiCamera.CFrame = Camera.CFrame*CameraOffset
094    for k,v in pairs(workspace:FindPartsInRegion3WithIgnoreList(R3,{},10000)) do
095        local Bit = ScreenBits[v]
096        if(Bit == nil) then
097            local bisInView = isInView(Camera,v)
098            if(bisInView == true) then
099                Bit = v:Clone()
100                Bit.Parent = Screen
101                ScreenBits[v] = Bit
102                v.Changed:Connect(function(thing)
103                    local Orig = v 
104                    local Exists,err = pcall(function() return Orig[thing] end, nil)
105                    if(Exists) then
106                        local MyCne = Bit
107                        MyCne[thing] = Orig[thing]
108                    end
109                end)
110            end    
111        end
112        if(Bit ~= nil) then
113            Bit.CFrame = v.CFrame   
114        end
115 
116    end
117end)
 View all 117 lines...

just copy and paste that into a local script inside the PlayerStarterscripts and run the game to see the effect! :)