Rename and move helper function

docs/src/lib/utils.md

@@ -72,7 +72,6 @@ LazySets.convert(::Type{Hyperplane{N}}, ::Expr; vars::Vector{Basic}=Basic[]) whe
 ```@docs
 sign_cadlag
 minmax
-arg_minmax
 ```
 
 ## Other functions

src/ConcreteOperations/convex_hull.jl

@@ -255,7 +255,7 @@ function _collinear_case!(points, A, B, C, D)
             # assign the points with max and min value in their second component
             # to the firsts points and the extra point to the third place, then
             # pop the point that was in the middle
-            min_y, max_y = arg_minmax(A[2], B[2], C[2])
+            min_y, max_y = _arg_minmax(A[2], B[2], C[2])
             points[1] = _get_i(min_y, A, B, C)
             points[2] = _get_i(max_y, A, B, C)
             points[3] = D
@@ -265,7 +265,7 @@ function _collinear_case!(points, A, B, C, D)
         # assign the points with max and min value in their first component to
         # the firsts points and the extra point to the third place, then pop the
         # point that was in the middle
-        min_x, max_x = arg_minmax(A[1], B[1], C[1])
+        min_x, max_x = _arg_minmax(A[1], B[1], C[1])
         points[1] = _get_i(min_x, A, B, C)
         points[2] = _get_i(max_x, A, B, C)
         points[3] = D
@@ -274,6 +274,23 @@ function _collinear_case!(points, A, B, C, D)
     return _three_points_2d!(points)
 end
 
+# return the indices of the minimum and maximum of three numbers a, b, c
+function _arg_minmax(a, b, c)
+    if a > b
+        min, max = b, a
+        imin, imax = 2, 1
+    else
+        min, max = a, b
+        imin, imax = 1, 2
+    end
+    if c > max
+        imax = 3
+    elseif c < min
+        imin = 3
+    end
+    return imin, imax
+end
+
 function _four_points_2d!(points::AbstractVector{<:AbstractVector{N}}) where {N}
     A, B, C, D = points[1], points[2], points[3], points[4]
     tri_ABC = right_turn(A, B, C)

src/Utils/numbers.jl

@@ -66,41 +66,3 @@ function minmax(a, b, c)
     end
     return min, max
 end
-
-"""
-    arg_minmax(a, b, c)
-
-Compute the indices of the minimum and maximum of three numbers a, b, c.
-
-### Input
-
-- `a` -- first number
-- `b` -- second number
-- `c` -- third number
-
-### Output
-
-The indices of the minimum and maximum of the three given numbers.
-
-### Examples
-
-```jldoctest
-julia> LazySets.arg_minmax(1.4, 52.4, -5.2)
-(3, 2)
-```
-"""
-function arg_minmax(a, b, c)
-    if a > b
-        min, max = b, a
-        imin, imax = 2, 1
-    else
-        min, max = a, b
-        imin, imax = 1, 2
-    end
-    if c > max
-        imax = 3
-    elseif c < min
-        imin = 3
-    end
-    return imin, imax
-end