Add Lerp() method to script Rotation class

CHANGELOG.md

@@ -28,6 +28,7 @@ TombEngine releases are located in this repository (alongside with Tomb Editor):
  - You must use this version: https://github.com/TombEngine/Resources/raw/refs/heads/main/Wad2%20Objects/Interactables/TEN_Waterfall_Emitter.wad2
 
 ### Lua API changes
+* Added Lerp() function to the Rotation object to allow linear interpolation between rotations.
 * Added diary module.
 * Added Effects.EmitAirBubble() function to spawn air bubbles.
 * Added additional arguments for Sprite object slot and starting rotation value for EmitParticle function.

TombEngine/Scripting/Internal/ReservedScriptNames.h

@@ -456,6 +456,7 @@ constexpr char ScriptReserved_StaticShatter[]		= "Shatter";
 
 constexpr char ScriptReserved_Rotation[]			= "Rotation";
 constexpr char ScriptReserved_RotationDirection[]	= "Direction";
+constexpr char ScriptReserved_RotationLerp[]		= "Lerp";
 
 // Vec2
 

TombEngine/Scripting/Internal/TEN/Types/Rotation/Rotation.cpp

@@ -8,7 +8,7 @@ using namespace TEN::Math;
 
 namespace TEN::Scripting
 {
-	/// Represents a degree-based 3D rotation.
+	/// Represents a 3D rotation.
 	// All angle components are in degrees clamped to the range [0.0, 360.0].
 	// @tenprimitive Rotation
 	// @pragma nostrip
@@ -21,11 +21,13 @@ namespace TEN::Scripting
 		// Register type.
 		parent.new_usertype<Rotation>(
 			ScriptReserved_Rotation,
-			ctors(),
+			ctors(), sol::call_constructor, ctors(),
-			sol::call_constructor, ctors(),
 
+			// Meta functions
 			sol::meta_function::to_string, &Rotation::ToString,
 
+			// Utilities
+			ScriptReserved_RotationLerp, &Rotation::Lerp,
 			ScriptReserved_RotationDirection, &Rotation::Direction,
 
 			/// (float) X angle component in degrees.
@@ -68,6 +70,17 @@ namespace TEN::Scripting
 		z = TO_DEGREES(eulers.z);
 	}
 
+	/// Get the linearly interpolated Rotation between this Rotation and the input Rotation according to the input alpha.
+	// @tparam Rotation rot Interpolation target.
+	// @tparam float alpha Interpolation alpha in the range [0, 1].
+	// @treturn Rotation Linearly interpolated rotation.
+	Rotation Rotation::Lerp(const Rotation& rot, float alpha) const
+	{
+		auto orientFrom = ToEulerAngles();
+		auto orientTo = rot.ToEulerAngles();
+		return Rotation(EulerAngles::Lerp(orientFrom, orientTo, alpha));
+	}
+
 	/// Get the normalized direction vector of this Rotation.
 	// @function Direction
 	// @treturn Vec3 Normalized direction vector.

TombEngine/Scripting/Internal/TEN/Types/Rotation/Rotation.h

@@ -29,7 +29,8 @@ namespace TEN::Scripting
 
 		// Utilities
 
-		Vec3 Direction() const;
+		Rotation Lerp(const Rotation& rot, float alpha) const;
+		Vec3	 Direction() const;
 
 		// Converters
 

TombEngine/Scripting/Internal/TEN/Types/Vec2/Vec2.cpp

@@ -148,9 +148,9 @@ Vec2 Vec2::Rotate(float rot) const
 
 /// Get the linearly interpolated Vec2 between this Vec2 and the input Vec2 according to the input interpolation alpha.
 // @function Vec2:Lerp
-// @tparam Vec2 vector Target interpolation vector.
+// @tparam Vec2 vector Interpolation target.
 // @tparam float alpha Interpolation alpha in the range [0, 1].
-// @treturn Vec2 Linearly interpolated vector
+// @treturn Vec2 Linearly interpolated vector.
 Vec2 Vec2::Lerp(const Vec2& vector, float alpha) const
 {
 	auto vector0 = ToVector2();

TombEngine/Scripting/Internal/TEN/Types/Vec3/Vec3.cpp

@@ -150,9 +150,9 @@ Vec3 Vec3::Rotate(const Rotation& rot) const
 
 /// Get the linearly interpolated Vec3 between this Vec3 and the input Vec3 according to the input interpolation alpha.
 // @function Vec3:Lerp
-// @tparam Vec3 vector Target interpolation vector.
+// @tparam Vec3 vector Interpolation target.
 // @tparam float alpha Interpolation alpha in the range [0, 1].
-// @treturn Vec3 Linearly interpolated vector
+// @treturn Vec3 Linearly interpolated vector.
 Vec3 Vec3::Lerp(const Vec3& vector, float alpha) const
 {
 	auto vector0 = ToVector3();