Merge branch 'PrecisionRender-add-missing-math-funcs'

Source/Engine/Core/Math/Math.h

@@ -393,7 +393,7 @@ namespace Math
     /// <param name="target">The value to move towards.</param>
     /// <param name="maxDelta">The maximum change that should be applied to the value.</param>
     template<class T>
-    float MoveTowards(const T current, const T target, const T maxDelta)
+    static T MoveTowards(const T current, const T target, const T maxDelta)
     {
         if (Abs(target - current) <= maxDelta)
             return target;
@@ -407,13 +407,38 @@ namespace Math
     /// <param name="target"></param>
     /// <param name="maxDelta"></param>
     template<class T>
-    float MoveTowardsAngle(const T current, const T target, const T maxDelta)
+    static T MoveTowardsAngle(const T current, const T target, const T maxDelta)
     {
-        float delta = DeltaAngle(current, target);
+        T delta = DeltaAngle(current, target);
         if ((-maxDelta < delta) && (delta < maxDelta))
             return target;
-        target = current + delta;
+        T deltaTarget = current + delta;
-        return MoveTowards(current, target, maxDelta);
+        return MoveTowards(current, deltaTarget, maxDelta);
+    }
+
+    /// <summary>
+    /// Calculates the shortest difference between two given angles given in degrees.
+    /// </summary>
+    /// <param name="current"></param>
+    /// <param name="target"></param>
+    template<class T>
+    static T DeltaAngle(const T current, const T target)
+    {
+        T t = Repeat(target - current, (T)360);
+        if (t > (T)180)
+            t -= (T)360;
+        return t;
+    }
+
+    /// <summary>
+    /// Loops the value t, so that it is never larger than length and never smaller than 0.
+    /// </summary>
+    /// <param name="t"></param>
+    /// <param name="length"></param>
+    template<class T>
+    static T Repeat(const T t, const T length)
+    {
+        return t - Floor(t / length) * length;
     }
 
     // Multiply value by itself