maths: allow mix's t to lie outside [0,1] a little

2018-03-14 18:13:05 +11:00 · 2018-03-14 18:13:05 +11:00 · deb787847c
commit deb787847c
parent c9dea18881
1 changed files with 3 additions and 2 deletions
--- a/maths.hpp
+++ b/maths.hpp
@ -688,8 +688,9 @@ namespace util {
    std::enable_if_t<std::is_floating_point<T>::value, U>
    mix (U a, U b, T t)
    {
-        assert (t >= 0);
-        assert (t <= 1);
+        // give some tolerance for floating point rounding
+        assert (t >= -0.00001f);
+        assert (t <=  1.00001f);

        return a * (1 - t) + b * t;
    }