feat: created CarPlayer class as a client to CarPhysics

src/car_player.cpp

@@ -0,0 +1,35 @@
+#include "car_player.hpp"
+#include "utils/player_input.hpp"
+#include <godot_cpp/variant/transform3d.hpp>
+#include <godot_cpp/classes/physics_direct_body_state3d.hpp>
+
+namespace godot {
+void CarPlayer::_bind_methods() {
+#define CLASSNAME CarPlayer
+}
+
+void CarPlayer::setup_player_input(PlayerInput *input) {
+    input->listen_to(PlayerInput::Listener("steer_right", "steer_left", callable_mp(this, &CarPlayer::on_steer)));
+    input->listen_to(PlayerInput::Listener("accelerate", callable_mp(this, &CarPlayer::on_accelerate)));
+    input->listen_to(PlayerInput::Listener("brake", callable_mp(this, &CarPlayer::on_brake)));
+}
+
+void CarPlayer::spawn_at_position(Transform3D const &transform) {
+    this->set_transform(transform);
+    this->set_scale({1,1,1});
+}
+
+void CarPlayer::on_steer(Ref<InputEvent> event, float value) {
+    this->set_current_steering(value * this->steering_factor);
+}
+
+void CarPlayer::on_brake(Ref<InputEvent> input, float value) {
+    this->set_brake(value != 0);
+}
+
+void CarPlayer::on_accelerate(Ref<InputEvent> input, float value) {
+    this->set_target_speed(max_speed * value);
+}
+
+Node *CarPlayer::to_node() { return this; }
+}

src/car_player.hpp

@@ -0,0 +1,30 @@
+#ifndef CAR_PLAYER_HPP
+#define CAR_PLAYER_HPP
+
+#include "car_physics.hpp"
+#include "utils/player.hpp"
+#include <godot_cpp/classes/input_event.hpp>
+#include <godot_cpp/classes/rigid_body3d.hpp>
+#include <godot_cpp/classes/collision_shape3d.hpp>
+
+namespace godot {
+class CarPlayer : public CarPhysics,
+                  public IPlayer {
+    GDCLASS(CarPlayer, CarPhysics);
+    static void _bind_methods();
+public:
+    virtual void setup_player_input(PlayerInput *input) override;
+    virtual void spawn_at_position(Transform3D const &transform) override;
+    virtual Node *to_node() override;
+
+    void on_steer(Ref<InputEvent> event, float value);
+    void on_brake(Ref<InputEvent> event, float value);
+    void on_accelerate(Ref<InputEvent> event, float value);
+private:
+    const float max_speed{34.f};
+    const float max_speed_reverse{10.f};
+    const float steering_factor{1.f};
+};
+};
+
+#endif // !CAR_PLAYER_HPP