Utility function for clamping value in given limits.

src/Math/Math.h

@@ -19,6 +19,7 @@
 #include <cmath>
 #include <type_traits>
 #include <limits>
+#include <algorithm>
 
 #include "magnumVisibility.h"
 
@@ -129,6 +130,11 @@ template<class Integral, class FloatingPoint> inline constexpr typename std::ena
         FloatingPoint(value*std::numeric_limits<Integral>::min()));
 }
 
+/** @brief Clamp value */
+template<class T> inline T clamp(T value, T min, T max) {
+    return std::min(std::max(value, min), max);
+}
+
 /**
 @brief Angle in degrees
 

src/Math/Test/MathTest.cpp

@@ -28,6 +28,7 @@ MathTest::MathTest() {
              &MathTest::degrad,
              &MathTest::normalize,
              &MathTest::denormalize,
+             &MathTest::clamp,
              &MathTest::pow,
              &MathTest::log);
 }
@@ -96,6 +97,12 @@ void MathTest::denormalize() {
     }
 }
 
+void MathTest::clamp() {
+    CORRADE_COMPARE(Math::clamp(0.5f, -1.0f, 5.0f), 0.5f);
+    CORRADE_COMPARE(Math::clamp(-1.6f, -1.0f, 5.0f), -1.0f);
+    CORRADE_COMPARE(Math::clamp(9.5f, -1.0f, 5.0f), 5.0f);
+}
+
 void MathTest::pow() {
     CORRADE_COMPARE(Math::pow<10>(2ul), 1024ul);
     CORRADE_COMPARE(Math::pow<0>(3ul), 1ul);

src/Math/Test/MathTest.h

@@ -27,6 +27,7 @@ class MathTest: public Corrade::TestSuite::Tester<MathTest> {
         void degrad();
         void normalize();
         void denormalize();
+        void clamp();
         void pow();
         void log();
 };