math: add saturate(x) as a shortcut to clamp(x,0,1).

src/lol/math/functions.h

@@ -235,7 +235,8 @@ static inline ldouble ceil(ldouble x) { return std::ceil(x); }
     static inline T fract(T x) { return x - lol::floor(x); } \
     static inline T min(T x, T y) { return std::min(x, y); } \
     static inline T max(T x, T y) { return std::max(x, y); } \
-    static inline T clamp(T x, T y, T z) { return min(max(x, y), z); }
+    static inline T clamp(T x, T y, T z) { return min(max(x, y), z); } \
+    static inline T saturate(T x) { return min(max(x, (T)0), (T)1); }
 
 #define LOL_GENERIC_FUNC_SIGNED(T) \
     LOL_GENERIC_FUNC(T) \

src/lol/math/vector.h

@@ -1032,6 +1032,15 @@ static inline vec_t<T,N> fract(vec_t<T,N,SWIZZLE> const &a)
     return ret;
 }
 
+template<typename T, int N, int SWIZZLE>
+static inline vec_t<T,N> saturate(vec_t<T,N,SWIZZLE> const &a)
+{
+    vec_t<T,N> ret;
+    for (int i = 0; i < N; ++i)
+        ret[i] = saturate(a[i]);
+    return ret;
+}
+
 template<typename T, int N, int SWIZZLE>
 static inline vec_t<T,N> normalize(vec_t<T,N,SWIZZLE> const &a)
 {