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How do I set the velocity to a part's look vector?

Asked by

Prioxis 673

9 years ago

I'm creating a custom gun system but the issue I've ran into is whenever I go to shoot at a certain angle the bullet always travels in the same direction..

issue is on lines 65-69

01wait()
02--services
03local lighting = game:GetService("Lighting")
04local serverstorage = game:GetService("ServerStorage")
05local workspace = game:GetService("Workspace")
06-- variables
07local player = game.Players.LocalPlayer
08local mouse = player:GetMouse()
09local character = player.Character
10local torso = script.Parent.Torso
11local gun = lighting.Models:FindFirstChild("AR15")
12local gun2
13local main
14local cam = game.Workspace.CurrentCamera
15local sprint = false
16local walk = false
17-- functions
18    local function weldBetween(a, b)
19    --Make a new Weld and Parent it to a.
20    local weld = Instance.new("ManualWeld", a)
21    weld.Part0 = a
22    weld.Part1 = b
23    --Get the CFrame of b relative to a.
24    weld.C0 = a.CFrame:inverse() * b.CFrame
25    --Return the reference to the weld so that you can change it later.
26    return weld
27    end
28 
29    function wepCreate()
30        local a = gun:Clone()
31        a.Main.CanCollide = false
32        local b = gun:FindFirstChild("Main")
33        a.Parent = character
34        b.CFrame = CFrame.new(torso.Position + Vector3.new(-0.5, 0, -3))
35        weldBetween(gun.Main, torso)
36        gun2 = a
37        main = gun2:FindFirstChild("Main")
38    end
39 
40    function onKeyPress(inputObject, gameProcessedEvent)
41    if inputObject.KeyCode == Enum.KeyCode.R then
42        wepCreate()
43        wait()
44    end
45    end
46 
47    game:GetService("UserInputService").InputBegan:connect(onKeyPress)  
48 
49    mouse.Button1Down:connect(function()
50        print("Mouse pressed!")
51        local ray = Ray.new(main.CFrame.p, (mouse.Hit.p - main.CFrame.p).unit * 300)
52        local part, position = workspace:FindPartOnRay(ray, player.Character, false, true)
53 
54        local beam = Instance.new("Part", workspace)
55        beam.BrickColor = BrickColor.new("Black")
56        beam.FormFactor = "Custom"
57        beam.Material = "Plastic"
58        beam.Shape = "Ball"
59        beam.TopSurface = "Smooth"
60        beam.BottomSurface = "Smooth"
61        beam.Anchored = false
62        beam.Locked = true
63        beam.CanCollide = false
64 
65        local distance = 50
66        beam.Size = Vector3.new(1, 1, 1)
67        local d = Instance.new("BodyVelocity", beam)
68        d.Velocity = Vector3.new(main.lookVector)
69        beam.CFrame = CFrame.new(main.Position + Vector3.new(0,0, -5))
70 
71        game:GetService("Debris"):AddItem(beam, 3)
72 
73        if part then
74            local humanoid = part.Parent:FindFirstChild("Humanoid")
75 
76            if not humanoid then
77                humanoid = part.Parent.Parent:FindFirstChild("Humanoid")
78            end
79 
80            if humanoid then
81                humanoid:TakeDamage(30)
82            end
83        end
84    end)
 View all 84 lines...

1 answer

Answered by

FlaminSparrow 65

9 years ago

LookVector is not a valid part of "main". LoocVector is a children of a part's CFrame. So basically, lookVector is the direction of that part is facing but not the velocity, just the direction.

On line 68, fix it into:

`1`	`d.Velocity` `=` `character.Head.CFrame.lookVector * (50)`

so i used Head because that is the direction your head/face is looking at. (Head.CFrame) means the CFrame of the head. (Head.CFrame.lookVector) means the direction of the head is looking at. (50) is just simply the speed it is launched.

Note: There is also a RayCast method for firing the bullet, but i dont know it yet. So if anyone knows how to fire bullets with RayCast, please answer it for him, then you can choose if you want to use my method or RayCast method. Hope this help!

the raycasting part is apart of the older system I'm trying it with a different method kept the raycast thingy in there just in case I decided to not use a part Prioxis 673 — 9y

also how do I make the bullets come out of the end of the part called main in the AR15 model? Prioxis 673 — 9y

bullet.CFrame = AR15.CFrame.p FlaminSparrow 65 — 9y

How do I set the velocity to a part's look vector?

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