How can I get a random (direction)point Inside the crosshair [GUI]

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#1

I’m doing a crosshair for my gun, but I don’t get what I want to do because I suck at math

What I am trying to do is a function that gives me a direction towards a random point within the crosshair BUT🍑 that is from a basepart towards the random point in 3D, because the weapon is in third person

owow
owow1311×817 63.8 KB

Anything helps :pray:

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#2

something like this

local camera = game.Workspace.CurrentCamera
local maxSpread = 20-- degrees

local function getRandomAngle(spread)
     spread *= 10
     return math.deg(math.random(-spread, spread) / 10)
end

local function getRandomPointInCrosshair()
     local crosshairRay = camera:ViewportPointToRay()
     local crosshairCFrame = CFrame.lookAt(crosshairRay.Origin, crosshairRay.Origin + crosshairRay.Direction)
     crosshairCFrame *= CFrame.Angles(0, getRandomAngle(maxSpread), getRandomAngle(maxSpread))
     local result = game.Workspace:Raycast(randomizedCameraAngle.Position, randomizedCameraAngle.lookVector * 300)
     if result then
          return result.Position
     end
end

edit: if it doesn’t spread vertically swap out the values for z from CFrame.Angles with the x instead

2 Likes
#3 
local angle = CFrame.Angles(0, 0, math.pi * 2 * math.random()) * CFrame.Angles(math.random() * spread, 0, 0)

where spread is spread size in radians.

And then you can do:

local direction = directionVector * angle
#4

Sorry for replying so late, I fell asleep xd
What do you mean by directionVector?

#5

My plan is to make the bullet come out of the “barrel” of the gun as shown in the image, not from the camera :sweat_smile:

#6

yeah, you’d be raycasting to see where the bullet should be shot to, not raycasting the bullet

1 Like
#7

OHHH OKAY I SEE!
What do you mean by randomizedCameraAngle?

#9

(replied to myself lol)
it’s a function in the code snippet, it’s declared there
btw the way it’s written means the spread is gonna be relative to how far your camera is to your target (if I understood the example pic correctly), if your intent was instead to have it be relative to the shotgun muzzle lmk since we’d need to swap out a couple variables

1 Like
#10

In short, this is what I’m trying to do:
robloxapp-20220912-1729072.wmv Srry is in .wmv

I didn’t understand what you mean by

:pleading_face:

#11

Finally!!!
I could do it by myself :face_with_monocle::wine_glass:

local function GetSpreadDirection(Offset)	
	
	local RA = Offset * math.sqrt(math.random()) / 2.5
	local theta = math.random() * 2 * math.pi
	local XOff = RA * math.cos(theta)
	local YOff = RA * math.sin(theta)
	
	local CrossHairPos = camera:ScreenPointToRay(mouse.X + XOff, mouse.Y + YOff)
	
	return CrossHairPos.Direction
end

Offset is the Size.X.Offset of the crosshair


keep

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