Find XY Angle Between 2 Hrps

-- Angle the nextHrp is based on the hrp's LookVector
local function XZAngleToNextHrp(hrp, nextHrp)
    -- Vector pointing in the direction of the nextHrp of length 1
    local dir = (nextHrp.Position - hrp.Position).Unit

    -- We only want to find the angle to the right or left, not up and down
    -- Get rid of the Y value
    local vecA = Vector2.new(dir.X, dir.Z)
    local vecB = Vector2.new(hrp.CFrame.LookVector.X, hrp.CFrame.LookVector.Z)


    -- Dot product is used to find the angle between lookVec and dir
    local dotValue = vecA:Dot(vecB)

    -- Cross product creates another vector used to orient the +/- of the angle
    local crossValue = vecA:Cross(vecB)

    -- with the dot product and cross product, atan2 find the angle you need
    local angle = math.atan2(crossValue, dotValue)
    return angle
end