3D Physics and Other Stuff

-=-=-=-=-=-=-=-=-=-=-=-=-=

-New Vehicle (Based on Bullet's RaycastVehicle) - Vehiclebody/VehicleWheel. Demo will come soon, old vehicle (CarBody) will go away soon too.
-A lot of fixes to the 3D physics engine
-Added KinematicBody with demo
-Fixed the space query API for 2D (demo will come soon). 3D is WIP.
-Fixed long-standing bug with body_enter/body_exit for Area and Area2D
-Performance variables now includes physics (active bodies, collision pairs and islands)
-Ability to see what's inside of instanced scenes!
-Fixed Blend Shapes (no bs+skeleton yet)
-Added an Android JavaClassWrapper singleton for using Android native classes directly from GDScript. This is very Alpha!

core/math/vector3.h

@@ -111,6 +111,12 @@ struct Vector3 {
         _FORCE_INLINE_ real_t distance_to(const Vector3& p_b) const;
         _FORCE_INLINE_ real_t distance_squared_to(const Vector3& p_b) const;
 
+
+
+	_FORCE_INLINE_ Vector3 slide(const Vector3& p_vec) const;
+	_FORCE_INLINE_ Vector3 reflect(const Vector3& p_vec) const;
+
+
         /* Operators */
 
         _FORCE_INLINE_ Vector3& operator+=(const Vector3& p_v);
@@ -368,6 +374,16 @@ void Vector3::zero() {
 	x=y=z=0;
 }
 
+Vector3 Vector3::slide(const Vector3& p_vec) const {
+
+	return p_vec - *this * this->dot(p_vec);
+}
+Vector3 Vector3::reflect(const Vector3& p_vec) const {
+
+	return p_vec - *this * this->dot(p_vec) * 2.0;
+
+}
+
 #endif
 
 #endif // VECTOR3_H