car controlled by player

godot/game.tscn

@@ -26,9 +26,14 @@ scale = Vector2(1.99747, 0.147406)
 texture = ExtResource("4_fc0e3")
 
 [node name="Car" parent="." instance=ExtResource("1_80nbo")]
+controlled_by_player = true
 script = ExtResource("4_7jktm")
 
 [node name="Camera2D" type="Camera2D" parent="Car"]
 position = Vector2(0, -1)
 scale = Vector2(0.1, 0.1)
 zoom = Vector2(0.36, 0.36)
+
+[node name="Car2" parent="." instance=ExtResource("1_80nbo")]
+position = Vector2(512, -1536)
+rotation = -1.0472

rust/crates/grand-theft-arena/src/car.rs

@@ -28,6 +28,9 @@ struct Car {
     /// Unit: radians
     max_steering_angle: f32,
 
+    #[export]
+    controlled_by_player: bool,
+
     base: Base<RigidBody2D>,
 }
 
@@ -47,6 +50,14 @@ impl Wheel {
     }
 }
 
+struct UserInput {
+    move_forward: bool,
+    move_backward: bool,
+    turn_left: bool,
+    turn_right: bool,
+    handbrake: bool,
+}
+
 #[godot_api]
 impl IRigidBody2D for Car {
     fn init(base: Base<RigidBody2D>) -> Self {
@@ -72,6 +83,9 @@ impl IRigidBody2D for Car {
                 y_distance: 200.0,
                 has_grip: true,
             },
+
+            // Exported
+            controlled_by_player: Default::default(),
         }
     }
 
@@ -90,14 +104,17 @@ impl IRigidBody2D for Car {
             self.base_mut().set_angular_velocity(0.0);
         }
 
-        let input = Input::singleton();
-        let move_forward = input.is_action_pressed("move_forward");
-        let move_backward = input.is_action_pressed("move_backward");
-        let turn_left = input.is_action_pressed("turn_left");
-        let turn_right = input.is_action_pressed("turn_right");
-
-        // TODO: Handbrake
-        let _handbrake = input.is_action_pressed("handbrake");
+        let user_input = if self.controlled_by_player {
+            self.user_input()
+        } else {
+            UserInput {
+                move_forward: false,
+                move_backward: false,
+                turn_left: false,
+                turn_right: false,
+                handbrake: false,
+            }
+        };
 
         let rotation = self.base().get_rotation();
 
@@ -106,7 +123,7 @@ impl IRigidBody2D for Car {
         let front_wheel_velocity = self.wheel_velocity(&self.front_wheel);
         let rear_wheel_velocity = self.wheel_velocity(&self.rear_wheel);
 
-        let front_wheel_angle = match (turn_left, turn_right) {
+        let front_wheel_angle = match (user_input.turn_left, user_input.turn_right) {
             (true, false) => -self.steering_angle(),
             (false, true) => self.steering_angle(),
             (true, true) | (false, false) => 0.0,
@@ -119,7 +136,7 @@ impl IRigidBody2D for Car {
         let rear_wheels_direction = forward;
 
         // Engine/thrust force
-        let thrust_force = match (move_forward, move_backward) {
+        let thrust_force = match (user_input.move_forward, user_input.move_backward) {
             (true, false) => self.engine_force * front_wheels_direction,
             (false, true) => {
                 if forward.dot(self.base().get_linear_velocity()) > 0.0 {
@@ -176,6 +193,25 @@ impl IRigidBody2D for Car {
 }
 
 impl Car {
+    fn user_input(&self) -> UserInput {
+        let gd_input = Input::singleton();
+        let move_forward = gd_input.is_action_pressed("move_forward");
+        let move_backward = gd_input.is_action_pressed("move_backward");
+        let turn_left = gd_input.is_action_pressed("turn_left");
+        let turn_right = gd_input.is_action_pressed("turn_right");
+
+        // TODO: Handbrake
+        let _handbrake = gd_input.is_action_pressed("handbrake");
+
+        UserInput {
+            move_forward,
+            move_backward,
+            turn_left,
+            turn_right,
+            handbrake: false,
+        }
+    }
+
     fn cornering_force(&mut self, slip_angle: f32) -> Vector2 {
         debug_assert!(slip_angle.is_finite());
         let right = self.right();