1 files changed, 7 insertions, 5 deletions
diff --git a/cv/numeric.hpp b/cv/numeric.hpp
index 0edb7f58..ce8f7e82 100644
--- a/cv/numeric.hpp
+++ b/cv/numeric.hpp
@@ -1,13 +1,15 @@
 #pragma once
 
+#include <type_traits>
 #include <opencv2/core.hpp>
 
-namespace types {
-    using f = double;
+namespace numeric_types {
+    using f = float;
 
-    namespace constants {
-        static constexpr inline f eps = f(1e-8);
-    }
+    static_assert(std::is_floating_point_v<f>);
+
+    static constexpr f eps = f(1e-8);
+    static constexpr f pi = f(M_PI);
 
     template<int n> using vec = cv::Vec<f, n>;
     using vec2 = vec<2>;