feat(ui): add CSimpleCamera::Position

src/ui/simple/CSimpleCamera.cpp

@@ -84,6 +84,10 @@ C3Vector CSimpleCamera::Right() const {
     return { this->m_facing.b0, this->m_facing.b1, this->m_facing.b2 };
 }
 
+const C3Vector& CSimpleCamera::Position() const {
+    return this->m_position;
+}
+
 void CSimpleCamera::SetFacing(const C3Vector& forward) {
     BuildBillboardMatrix(forward, this->m_facing);
 }

src/ui/simple/CSimpleCamera.hpp

@@ -18,6 +18,7 @@ class CSimpleCamera {
         // Public member functions
         CSimpleCamera(float nearZ, float farZ, float fov);
         CM2Scene* GetScene();
+        const C3Vector& Position() const;
         void SetFacing(const C3Vector& forward);
         void SetFacing(const C3Vector& forward, const C3Vector& up);
         void SetFacing(float yaw, float pitch, float roll);