Added Vector3::Lerp (unit test omitted for now)

include/Vector3.h

@@ -197,8 +197,6 @@ public:
 	/// <returns>The cross product of the two vectors</returns>
 	static Vector3 Cross(const Vector3& vector1, const Vector3& vector2);
 
-	// Projects a vector onto another vector.
-
 	/// <summary>
 	/// Project a vector on another vector
 	/// </summary>
@@ -233,4 +231,16 @@ public:
 	/// <param name="axis">The axis to rotate around</param>
 	/// <returns>The signed angle</returns>
 	static float SignedAngle(Vector3 from, Vector3 to, Vector3 axis);
+
+
+	/// <summary>
+	/// Lerp between two vectors
+	/// </summary>
+	/// <param name="from">The from vector</param>
+	/// <param name="to">The to vector</param>
+	/// <param name="f">The interpolation distance (0..1)</param>
+	/// <returns>The lerped vector</returns>
+	/// The factor f is unclamped. Value 0 matches the *from* vector, Value 1 matches the *to* vector
+	/// Value -1 is *from* vector minus the difference between *from* and *to* etc.
+	static Vector3 Lerp(Vector3 from, Vector3 to, float f);
 };

src/Vector3.cpp

@@ -160,3 +160,8 @@ float Vector3::SignedAngle(Vector3 from, Vector3 to, Vector3 axis) {
 	return signed_angle;
 
 }
+
+Vector3 Vector3::Lerp(Vector3 from, Vector3 to, float f) {
+	Vector3 v = from + (to - from) * f;
+	return v;
+}

test/Vector3_test.cc

@@ -523,4 +523,8 @@ TEST(Vector3, SignedAngle) {
 		EXPECT_TRUE(r) << "SignedAngle(4 5 6, -INFINITY -INFINITY -INFINITY)";
 
 	}
+}
+
+TEST(Vector3, DISABLED_Lerp) {
+
 }