feat: add firstpersoncontroller

destrum/include/destrum/Input/InputManager.h

@@ -30,8 +30,8 @@ public:
 
     int MouseX() const { return m_mouseX; }
     int MouseY() const { return m_mouseY; }
-    int MouseDeltaX() const { return m_mouseDX; }
-    int MouseDeltaY() const { return m_mouseDY; }
+    int MouseDeltaX() const { return m_mouseRelDX; }
+    int MouseDeltaY() const { return m_mouseRelDY; }
 
     int WheelX() const { return m_wheelX; }
     int WheelY() const { return m_wheelY; }
@@ -81,6 +81,9 @@ public:
 
     void SetAxisDeadzone(int deadzone) { m_axisDeadzone = deadzone; } // 0..32767
 
+    void SetMouseCaptured(bool captured);
+    [[nodiscard]] bool IsMouseCaptured() const { return m_MouseCaptured; }
+
 private:
     // Key states
     std::unordered_set<SDL_Scancode> m_keysDown;
@@ -92,10 +95,9 @@ private:
     std::unordered_set<Uint8> m_mousePressed;
     std::unordered_set<Uint8> m_mouseReleased;
 
-    // Mouse position + delta
+    // Mouse position + relative delta (accumulated from SDL xrel/yrel)
     int m_mouseX = 0, m_mouseY = 0;
-    int m_prevMouseX = 0, m_prevMouseY = 0;
-    int m_mouseDX = 0, m_mouseDY = 0;
+    int m_mouseRelDX = 0, m_mouseRelDY = 0;
 
     int m_wheelX = 0, m_wheelY = 0;
 
@@ -125,6 +127,8 @@ private:
 
     int m_axisDeadzone = 8000; // typical deadzone
 
+    bool m_MouseCaptured = false;
+
 private:
     bool QueryBinding(const Binding& b, ButtonState state) const;