See if a CFrame is in a Region3, without create new part

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#1

So I have a placing system, and I only want the player to place some model only inside of an area, so when the player want to place a model, they will send a remote with the model and a frame so the player can process, so how do I find if that Cframe is in the Region, without creating a part.

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#2

I wrote this function that will likely solve your issue


function isVector3inRegion3(region,vector)
    rSize = region.Size
    rVector = region.CFrame.p
    
    xVector = vector.X
    xrSize = rSize.X
    xrVector = rVector.X
    x1 = xrVector + (math.abs(xrSize/2))
    x2 = xrVector - (math.abs(xrSize/2))
    
    if xVector > math.max(x1,x2) or xVector < math.min(x1,x2) then
        return false
    end
    
    yVector = vector.Y
    yrSize = rSize.Y
    yrVector = rVector.Y
    y1 = yrVector + (math.abs(yrSize/2))
    y2 = yrVector - (math.abs(yrSize/2))
    
    if yVector > math.max(y1,y2) or yVector < math.min(y1,y2) then
        return false
    end
    
    zVector = vector.Z
    zrSize = rSize.Z
    zrVector = rVector.Z
    z1 = yrVector + (math.abs(zrSize/2))
    z2 = yrVector - (math.abs(zrSize/2))
    
    if zVector > math.max(z1,z2) or zVector < math.min(z1,z2) then
        return false
    end
    
    return true
end

Haven’t had the time to test it, so let me know if it works for tou.

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#3

I already found a solution, but thank you for your contribution

local function isInRegion3(region, point)
    local relative = (point - region.CFrame.p) / region.Size
    return -0.5 <= relative.X and relative.X <= 0.5
       and -0.5 <= relative.Y and relative.Y <= 0.5
       and -0.5 <= relative.Z and relative.Z <= 0.5
end