feat: add interactable component and test button

lightkeeper/include/components/FirstPersonController.h

@@ -7,9 +7,8 @@
 
 class Rigidbody;
 class CapsuleCollider;
+class Interactable;
 
-// Dynamic capsule character. Velocity is driven directly (no forces) so movement stays responsive:
-// acceleration towards the wished velocity, own gravity, coyote time and jump buffering.
 class FirstPersonController final : public Component {
 public:
     explicit FirstPersonController(GameObject& parent);
@@ -26,9 +25,9 @@ public:
     [[nodiscard]] float GetYaw() const { return m_Yaw; }
     void SetYaw(float yawRadians) { m_Yaw = yawRadians; }
     [[nodiscard]] float GetPitch() const { return m_Pitch; }
+    void SetPitch(float pitchRadians) { m_Pitch = pitchRadians; }
     [[nodiscard]] float GetEyeHeight() const { return m_EyeHeight; }
 
-    // Eye position interpolated between the last two physics steps, so the camera moves smoothly at any framerate
     [[nodiscard]] glm::vec3 GetEyePosition() const;
 
     void SetMovementSpeed(float speed) { m_WalkSpeed = speed; }
@@ -39,12 +38,16 @@ public:
 
     [[nodiscard]] bool IsGrounded() const { return m_Grounded; }
 
+    [[nodiscard]] Interactable* GetFocusedInteractable() const { return m_FocusedInteractable; }
+    [[nodiscard]] glm::vec3 GetLookDirection() const;
+
     [[nodiscard]] bool IsMouseCaptured() const { return InputManager::GetInstance().IsMouseCaptured(); }
     void SetMouseCaptured(bool captured);
 
 private:
     [[nodiscard]] bool CheckGrounded() const;
     [[nodiscard]] glm::vec3 GetWishDirection() const;
+    [[nodiscard]] Interactable* FindFocusedInteractable() const;
 
     Rigidbody* m_Rigidbody{nullptr};
     CapsuleCollider* m_Capsule{nullptr};
@@ -63,6 +66,9 @@ private:
     float m_FallGravityMultiplier{1.6f};
     float m_CoyoteTime{0.1f};
     float m_JumpBufferTime{0.12f};
+    float m_InteractDistance{3.0f};
+
+    Interactable* m_FocusedInteractable{nullptr};
 
     bool m_Grounded{false};
     bool m_JumpHeld{false};