Overloaded max/min for int3 and removed old comments

src/core/math_utils.h

@@ -42,6 +42,18 @@ min(const T& a, const T& b)
     return a < b ? a : b;
 }
 
+static inline const int3
+max(const int3& a, const int3& b)
+{
+    return (int3){max(a.x, b.x), max(a.y, b.y), max(a.z, b.z)};
+}
+
+static inline const int3
+min(const int3& a, const int3& b)
+{
+    return (int3){min(a.x, b.x), min(a.y, b.y), min(a.z, b.z)};
+}
+
 template <class T>
 static inline const T
 sum(const T& a, const T& b)