How to check if 2 part intersects but not overlap | Suphi Kaner | Page 1

worldly talon Feb 10, 2023, 1:43 PM

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Ye so if a part completly covers another part i want to ignore that

radiant zephyr Feb 10, 2023, 4:07 PM

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is the part a cube?

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simple check the 8 corners and makes sure all 8 corners are inside the other part

ocean gazelle Feb 10, 2023, 4:22 PM

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radiant zephyr simple check the 8 corners and makes sure all 8 corners are inside the other par...

wait what, you can check the corners of a part?

radiant zephyr Feb 10, 2023, 4:23 PM

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sure

ocean gazelle Feb 10, 2023, 4:26 PM

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radiant zephyr sure

how

radiant zephyr Feb 10, 2023, 4:30 PM

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local function PartInPart(partA, partB)
    local edges = {
        partA.CFrame * Vector3.new(-partA.Size.X / 2, partA.Size.Y / 2, -partA.Size.Z / 2)
        partA.CFrame * Vector3.new(partA.Size.X / 2, partA.Size.Y / 2, -partA.Size.Z / 2)
        partA.CFrame * Vector3.new(-partA.Size.X / 2, partA.Size.Y / 2, partA.Size.Z / 2)
        partA.CFrame * Vector3.new(partA.Size.X / 2, partA.Size.Y / 2, partA.Size.Z / 2)
        partA.CFrame * Vector3.new(-partA.Size.X / 2, -partA.Size.Y / 2, -partA.Size.Z / 2)
        partA.CFrame * Vector3.new(partA.Size.X / 2, -partA.Size.Y / 2, -partA.Size.Z / 2)
        partA.CFrame * Vector3.new(-partA.Size.X / 2, -partA.Size.Y / 2, partA.Size.Z / 2)
        partA.CFrame * Vector3.new(partA.Size.X / 2, -partA.Size.Y / 2, partA.Size.Z / 2)
    }
    for i, position in edges do
            local objectPosition = partB.CFrame:PointToObjectSpace(position)
            if math.abs(objectPosition.X) > brick.Size.X / 2 then return false end
            if math.abs(objectPosition.Y) > brick.Size.Y / 2 then return false end
            if math.abs(objectPosition.Z) > brick.Size.Z / 2 then return false end
    end
    return true
end

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you could optimize this function a bit and I'm not sure if there is more smart way of doing it

tulip salmon Feb 10, 2023, 5:02 PM

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@worldly talon bro can u explain me?

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i think i can help u

radiant zephyr Feb 10, 2023, 6:22 PM

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unfortunately Roblox's new documentation no longer tells you but it transforms in object space

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it returns a vector3

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its the same as https://create.roblox.com/docs/reference/engine/datatypes/CFrame#PointToWorldSpace

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-- OLD scroll down for new code
local function PartInPart(partA, partB)
    local edges = {
        partA.CFrame:PointToWorldSpace(Vector3.new(-partA.Size.X / 2, partA.Size.Y / 2, -partA.Size.Z / 2))
        partA.CFrame:PointToWorldSpace(Vector3.new(partA.Size.X / 2, partA.Size.Y / 2, -partA.Size.Z / 2))
        partA.CFrame:PointToWorldSpace(Vector3.new(-partA.Size.X / 2, partA.Size.Y / 2, partA.Size.Z / 2))
        partA.CFrame:PointToWorldSpace(Vector3.new(partA.Size.X / 2, partA.Size.Y / 2, partA.Size.Z / 2))
        partA.CFrame:PointToWorldSpace(Vector3.new(-partA.Size.X / 2, -partA.Size.Y / 2, -partA.Size.Z / 2))
        partA.CFrame:PointToWorldSpace(Vector3.new(partA.Size.X / 2, -partA.Size.Y / 2, -partA.Size.Z / 2))
        partA.CFrame:PointToWorldSpace(Vector3.new(-partA.Size.X / 2, -partA.Size.Y / 2, partA.Size.Z / 2))
        partA.CFrame:PointToWorldSpace(Vector3.new(partA.Size.X / 2, -partA.Size.Y / 2, partA.Size.Z / 2))
    }
    for i, position in edges do
        local objectPosition = partB.CFrame:PointToObjectSpace(position)
        if math.abs(objectPosition.X) > brick.Size.X / 2 then return false end
        if math.abs(objectPosition.Y) > brick.Size.Y / 2 then return false end
        if math.abs(objectPosition.Z) > brick.Size.Z / 2 then return false end
    end
    return true
end

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this should give the same result

tulip salmon Feb 10, 2023, 6:41 PM

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local function PartInPart(partA, partB)

for a = 1,2 do
for b = 1,2 do
for c = 1,2 do
edges[#edges + 1] = partA.CFrame:PointToWorldSpace(Vector3.new( math.pow(-1,a) * partA.Size.X / 2, math.pow(-1,b) * partA.Size.Y / 2, math.pow(-1,c) * partA.Size.Z / 2))
end
end
end
for i, position in edges do
local objectPosition = partB.CFrame:PointToObjectSpace(position)
if math.abs(objectPosition.X) > brick.Size.X / 2 then return false end
if math.abs(objectPosition.Y) > brick.Size.Y / 2 then return false end
if math.abs(objectPosition.Z) > brick.Size.Z / 2 then return false end
end
return true
end

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i made it smaller

radiant zephyr Feb 10, 2023, 7:10 PM

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tulip salmon local function PartInPart(partA, partB) for a = 1,2 do for b = 1,2 do ...

if you do it like this then you don't need the edges table

local function PartInPart(partA, partB)
  for x = -0.5, 0.5 do
    for y = -0.5, 0.5 do
      for z = -0.5, 0.5 do
        local worldPosition = partA.CFrame * Vector3.new(partA.Size.X * x, partA.Size.Y * y, partA.Size.Z * z)
        local objectPosition = partB.CFrame:PointToObjectSpace(worldPosition)
        if math.abs(objectPosition.X) > brick.Size.X / 2 then return false end
        if math.abs(objectPosition.Y) > brick.Size.Y / 2 then return false end
        if math.abs(objectPosition.Z) > brick.Size.Z / 2 then return false end
      end
    end
  end
  return true
end

tulip salmon Feb 10, 2023, 7:10 PM

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yeah lol

radiant zephyr Feb 10, 2023, 7:12 PM

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tulip salmon yeah lol

and you dont need pow

tulip salmon Feb 10, 2023, 7:12 PM

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i found that idea first

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but

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bro

radiant zephyr Feb 10, 2023, 7:13 PM

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tulip salmon i found that idea first

and you dont need / 2

tulip salmon Feb 10, 2023, 7:13 PM

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but

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u need to tell there if not 0

radiant zephyr Feb 10, 2023, 7:13 PM

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let me test

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it works

tulip salmon Feb 10, 2023, 7:16 PM

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but it need to amke bug because of 0

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oh

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ok

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sry

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its goin +1

radiant zephyr Feb 10, 2023, 7:16 PM

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yer for -0.5 it goes to 0.5

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no 0

tulip salmon Feb 10, 2023, 7:16 PM

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ya

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i couldnt notice that

worldly talon Feb 14, 2023, 4:37 PM

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what about complex shapes

radiant zephyr Feb 14, 2023, 4:54 PM

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worldly talon what about complex shapes

local part = Instance.new("Part")
part.Size = Vector3.new(0, 0, 0)
part.Anchored = true
part.Transparency = 1
part.CanCollide = false
part.CanQuery = false
part.CanTouch = false
part.Parent = workspace

local overlapParams = OverlapParams.new()
overlapParams.FilterType = Enum.RaycastFilterType.Whitelist

local function PartInPart(partA, partB)
  overlapParams.FilterDescendantsInstances = {partB}
  for x = -0.5, 0.5 do
    for y = -0.5, 0.5 do
      for z = -0.5, 0.5 do
        part.Position = partA.CFrame * Vector3.new(partA.Size.X * x, partA.Size.Y * y, partA.Size.Z * z)
        if #workspace:GetPartsInPart(part, overlapParams) == 0 then return false end
      end
    end
  end
  return true
end

ocean gazelle Feb 16, 2023, 2:47 AM

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radiant zephyr ```lua local part = Instance.new("Part") part.Size = Vector3.new(0, 0, 0) part.A...

finally

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an example of overlap params

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whats the difference between whitelist and blacklist?

#How to check if 2 part intersects but not overlap