I’m trying to make a bullet penetration system, so far I’m just trying to make the barebones and allow it to get the width of a part so I can do the math later.
I’m trying to get the width of a part by raycasting to one side, then raycasting from the other side to where the first raycast hit. The problem is I need to be able to move the second raycast’s origin to maybe 100 studs in front of where it hit, the direction is toward where the first raycast hit the part. In other words I’m having a problem with manipulating the Vector3 values.
There is of course a problem with it being 100 studs from the start, if it were to hit a mesh, depending on the shape, it could hit it in the wrong place. This is a problem for another day, but 100 or even 50 studs would give plenty of room for as much wall penetration as needed.
I’ve searched for it in many different ways and haven’t found any way to achieve it. Although it probably a really simple task. Any help is appreciated.
local player = game.Players.LocalPlayer
local char = player.Character or player.CharacterAdded:Wait()
local mouse = player:GetMouse()
local function CalculatePenetrationDistance(hit, mouseHit)
local raycastParams = RaycastParams.new()
raycastParams.FilterType = Enum.RaycastFilterType.Include -- Only detects the part that was hit in the first raycast
raycastParams.IgnoreWater = true
local rayOrigin = char.HumanoidRootPart.Position
local rayDestination = mouseHit
local rayDirection = rayDestination - rayOrigin
local raycastResult = workspace:Raycast(rayOrigin, rayDirection)
-- Found part.
if raycastResult then
local secondRayOrigin = nil -- This is the part that stumps me.
raycastParams.FilterDescendantsInstances = {raycastResult.Instance}
local raycastResult1 = workspace:Raycast(secondRayOrigin, raycastResult.Position - secondRayOrigin, raycastParams)
if raycastResult1 then
--Found second part.
return (raycastResult.Position - raycastResult1.Position).Magnitude
end
end
end
mouse.Button1Down:Connect(function()
print(CalculatePenetrationDistance(mouse.Target, mouse.Hit.Position))
end)
I set the secondRayOrigin variable to nil because I believe its what I need to manipulate to get the origin to move away from the first impact and wanted to make it less confusing. You could think of this system as if the raycasts are mirrored across the part.
Offset your hit point by RayDirection * math.max(HitInstance.Size.X, Size.Y, Size.Z) and then raycast backwards towards origin. You can use RaycastParams to prevent the ray from hitting any other objects other than HitInstance.
This should work for most cases, but if you want to have a max penetration distance for your bullets you can use that in place of Size. Then if it hits nothing then the part is too thick for your bullet to penetrate.
Can you explain a bit more? You want a bullet to hit something, then make a second raycast like this to know if the bullet will go trough?
(blue bullet, brown second raycast)
So I wanted to just find the distance between the two points, that way I can subtract that from a penetration amount variable.
If I had a wall that was 2 studs wide and I shot at it square, and my gun had 5 studs of penetration in the first place. I would have 3 studs left. If that explains it any better.
Use the PenetrationAmount variable to find the second origin then. NextOrigin = HitPoint + (RayDirection * PenetrationAmount). If your cast doesn’t hit anything then the part you hit is too thick for your bullet to go through.
try something like this: (paste in local script inside tool with handle)
local ContextActionService = game:GetService("ContextActionService")
local rs = game:GetService("ReplicatedStorage")
local plr = game.Players.LocalPlayer
local char = plr.Character or plr.CharacterAdded:Wait()
local tool = script.Parent
local mouse = plr:GetMouse()
local bm = false
local cdown = 2
local function doSomenting(actionName, inputState, inputObject)
if inputState == Enum.UserInputState.End then
local originpos = tool.Handle.Position
local endpos = mouse.Hit.Position
local direction = (endpos - originpos).Unit
local raycast1 = RaycastParams.new()
local raycastResult1 = workspace:Raycast(originpos,direction * 100)
if raycastResult1 then
local originpos2 = raycastResult1.Position + direction * 10
print(originpos2)
--local endpos2 = raycastResult1.Position
local raycast2 = RaycastParams.new()
local raycastResult2 = workspace:Raycast(originpos2,-direction * 10)
if raycastResult2 then
print(raycastResult2.Position)
print("lenght:",(raycastResult1.Position-raycastResult2.Position).Magnitude)
end
end
end
end
tool.Equipped:Connect(function()
ContextActionService:BindAction("Mouse1Atack", doSomenting, true, Enum.UserInputType.MouseButton1)
end)
tool.Unequipped:Connect(function()
ContextActionService:UnbindAction("Mouse1Atack")
end) ```
It seems to work and you should, like tom_atoes says, use raycast params to only scan for the hited part, substract the “lengh:” value from the rest of the bullet penetration studs, and do a new raycast from the second raycast result, with the same direction and probably less lenght
local secondRayOrigin = raycastResult.Position + rayDirection * bullet_penetration_depth
local raycastResult2 = workspace:Raycast(secondRayOrigin, -rayDirection.Unit * bullet_penetration_depth)
I think this is progress, as now the second raycast is hitting the part. However the number it returns is not always accurate. Sometimes it is somewhat accurate, other times it is 0.84308413 studs while shooting right through a 4,4,4 block. As for if it just goes through, it doesn’t quite work as expected.
Heres the code if you would like to try it.
local player = game.Players.LocalPlayer
local char = player.Character or player.CharacterAdded:Wait()
local mouse = player:GetMouse()
local function CalculatePenetrationDistance(hit, mouseHit)
local raycastParams = RaycastParams.new()
raycastParams.FilterType = Enum.RaycastFilterType.Include -- Only detects the part that was hit in the first raycast
raycastParams.IgnoreWater = true
local rayOrigin = char.HumanoidRootPart.Position
local rayDestination = mouseHit
local rayDirection = rayDestination - rayOrigin
local raycastResult = workspace:Raycast(rayOrigin, rayDirection)
-- Found part.
if raycastResult then
local secondRayOrigin = rayDestination + (rayDirection * 2)
raycastParams.FilterDescendantsInstances = {raycastResult.Instance}
local raycastResult1 = workspace:Raycast(secondRayOrigin, raycastResult.Position - secondRayOrigin, raycastParams)
if raycastResult1 then
print("Went through")
--Found second part.
return (raycastResult1.Position - raycastResult.Position).Magnitude
end
end
end
mouse.Button1Down:Connect(function()
print(CalculatePenetrationDistance(mouse.Target, mouse.Hit.Position))
end)
i went insane i dont why i did not work but now does?
local player = game.Players.LocalPlayer
local char = player.Character or player.CharacterAdded:Wait()
local mouse = player:GetMouse()
local bullet_pen_studs = 5
function spawnpart(pos,c)
local part = Instance.new("Part")
part.BrickColor = c
part.Anchored = true
part.Position = pos
part.Size = Vector3.new(1,1,1)
part.Parent = workspace
end
local function CalculatePenetrationDistance(hit, mouseHit)
local raycastParams = RaycastParams.new()
raycastParams.FilterType = Enum.RaycastFilterType.Include -- Only detects the part that was hit in the first raycast
raycastParams.IgnoreWater = true
local rayOrigin = script.Parent.Handle.Position
local rayDestination = mouseHit
local rayDirection = (rayDestination - rayOrigin).Unit
local raycastResult = workspace:Raycast(rayOrigin, rayDirection * 1000)
-- Found part.
if raycastResult then
spawnpart(raycastResult.Position,BrickColor.Red())
warn(raycastResult.Instance.Name)
local secondRayOrigin = raycastResult.Position + (rayDirection * bullet_pen_studs)
raycastParams.FilterDescendantsInstances = {raycastResult.Instance}
local raycastResult2 = workspace:Raycast(secondRayOrigin, -rayDirection * (bullet_pen_studs), raycastParams)
spawnpart(secondRayOrigin,BrickColor.Yellow())
if raycastResult2 then
print("went trough")
spawnpart(raycastResult2.Position,BrickColor.Green())
--Found second part.
return (raycastResult2.Position - raycastResult.Position).Magnitude
end
end
end
mouse.Button1Down:Connect(function()
print(CalculatePenetrationDistance(mouse.Target, mouse.Hit.Position))
end)
I think it was the way of raycasting, mouse.Hit.Position sometimes can make you miss the part or something idk
And it keeps hiting the character
And 1 stud is less than you think, its really hard go trough a 1 stud wide wall with 1 stud of penetration
