BLI: Adjust interpolation to support integers, other tweaks

In order to allow interpolation of integers with a float, add a separate
template parameter for the factor and multiplication types.
Also move some helper constexpr variables to the "base" header
(reversing the dependency to "base" -> "vector").

This also adds a distance function for scalar types, which is
helpful to allow sharing code between vectors and basic types.

Differential Revision: https://developer.blender.org/D14446

1 files changed, 1 insertions, 10 deletions

diff --git a/source/blender/blenlib/BLI_math_vec_types.hh b/source/blender/blenlib/BLI_math_vec_types.hh
index 389307e331d..d9524eae746 100644
--- a/source/blender/blenlib/BLI_math_vec_types.hh
+++ b/source/blender/blenlib/BLI_math_vec_types.hh
@@ -321,7 +321,7 @@ template<typename T, int Size> struct vec_base : public vec_struct_base<T, Size>
     BLI_VEC_OP_IMPL(ret, i, ret[i] = a[i] * b[i]);
   }
 
-  friend vec_base operator*(const vec_base &a, T b)
+  template<typename FactorT> friend vec_base operator*(const vec_base &a, FactorT b)
   {
     BLI_VEC_OP_IMPL(ret, i, ret[i] = a[i] * b);
   }
@@ -579,13 +579,4 @@ using double2 = vec_base<double, 2>;
 using double3 = vec_base<double, 3>;
 using double4 = vec_base<double, 4>;
 
-template<typename T>
-inline constexpr bool is_math_float_type = (std::is_floating_point_v<T>
-#ifdef WITH_GMP
-                                            || std::is_same_v<T, mpq_class>
-#endif
-);
-
-template<typename T> inline constexpr bool is_math_integral_type = std::is_integral_v<T>;
-
 }  // namespace blender