How can I detect if there is a part inside of a viewmodel? (PLACEMENT SYSTEM)

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#1

  1. What do you want to achieve? Keep it simple and clear!
    I want to make a localscript that detects if there is a part inside of the viewmodel (the viewmodel is kinda like the placing part before you have placed it). I don’t want it to detect if a part is touching it, only if a part is a little bit inside of it.

  2. What is the issue? Include screenshots / videos if possible!
    I don’t know much about this.

  3. What solutions have you tried so far? Did you look for solutions on the Developer Hub?
    I have tried YT and Devforum

#2

Find the object that represents your viewmodel (e.g., a tool or a model) and insert a LocalScript into it.
Here’s an example:

local viewmodel = script.Parent -- Change 'script.Parent' to the actual path of your viewmodel object
local partToCheck = workspace.PartToCheck -- Change 'workspace.PartToCheck' to the actual path of the part you want to check

-- Function to check if a part is partially inside the viewmodel
local function isPartInside(part)
    local viewmodelRegion = viewmodel:GetBoundingBox()
    local partRegion = part:GetBoundingBox()

    -- Check if the part's region intersects with the viewmodel's region
    return viewmodelRegion:IntersectsWith(partRegion)
end

-- Connect the function to a checking event (e.g., using a loop or a user input event)
-- For example, you can check this condition when a user clicks a button or presses a key
-- Replace 'MouseButton1Click' with the actual event you want to trigger this check
viewmodel.MouseButton1Click:Connect(function()
    if isPartInside(partToCheck) then
        print("The part is partially inside the viewmodel.")
    else
        print("The part is not inside the viewmodel.")
    end
end)
#3

i got an error when i changed it to my script: GetBoundingBox is not a valid member of UnionOperation “Workspace.Foundation”

#4

Also, how do i check to see if any part is inside of the viewmodel not just a specific part

#5

Ok, I think I fixed the error, and I changed the script so it checks if any part is inside the viewmodel by checking each part’s vertices. Let me know if it works.

local viewmodel = script.Parent -- Change 'script.Parent' to the actual path of your viewmodel object

-- Function to check if a point is inside the viewmodel
local function isPointInside(point, model)
    local localPoint = model:WorldToLocal(point)
    local size = model.Size / 2
    return math.abs(localPoint.x) < size.x and
           math.abs(localPoint.y) < size.y and
           math.abs(localPoint.z) < size.z
end

-- Connect the function to a checking event (e.g., using a loop or a user input event)
-- For example, you can check this condition when a user clicks a button or presses a key
-- Replace 'MouseButton1Click' with the actual event you want to trigger this check
viewmodel.MouseButton1Click:Connect(function()
    local workspaceParts = workspace:GetDescendants() -- Get all parts in the workspace

    for _, part in pairs(workspaceParts) do
        if part:IsA("BasePart") then -- Check if the object is a part
            local partVertices = part:GetVertices()

            for _, vertex in pairs(partVertices) do
                local worldPosition = part.CFrame:PointToWorldSpace(vertex)
                if isPointInside(worldPosition, viewmodel) then
                    print("A part is partially inside the viewmodel.")
                    return
                end
            end
        end
    end

    print("No part is inside the viewmodel.")
end)
1 Like
#6

This is good and all, but it checks to see if theres a basepart in it. How can I make it so that if anything at all is in it then it will go red not just from baseparts.

#7

This script will consider all objects in the workspace, not just BasePart objects, when checking for objects inside the viewmodel.

local viewmodel = script.Parent -- Change 'script.Parent' to the actual path of your viewmodel object

-- Function to check if an object is inside the viewmodel
local function isObjectInside(object, model)
    local objectPosition = object.Position
    local modelPosition = model.Position
    local modelSize = model.Size / 2

    local relativePosition = model:WorldToLocal(objectPosition)

    return math.abs(relativePosition.x) < modelSize.x and
           math.abs(relativePosition.y) < modelSize.y and
           math.abs(relativePosition.z) < modelSize.z
end

-- Connect the function to a checking event (e.g., using a loop or a user input event)
-- For example, you can check this condition when a user clicks a button or presses a key
-- Replace 'MouseButton1Click' with the actual event you want to trigger this check
viewmodel.MouseButton1Click:Connect(function()
    local workspaceObjects = workspace:GetDescendants() -- Get all objects in the workspace

    for _, object in pairs(workspaceObjects) do
        if isObjectInside(object, viewmodel) then
            print("An object is inside the viewmodel.")
            return
        end
    end

    print("No object is inside the viewmodel.")
end)
1 Like
#8

But how come it says, if Object:IsA(“BasePart”)

1 Like
#9

a BasePart is a superset of Part, MeshPart, Wedge, etc. (or anything that can be rendered). afaik theres no use of including non-BaseParts

#10

what is this? theres no such thing as :GetVertices()??? are you using chatgpt :skull:

1 Like
#11

Hmmm, Seems like a reasonable assumption. GPT can output a response with that line of code when you generate a prompt that finds collisions in LUA.