text: //-----------------------------------------------------------------------------
  // COMPILE-TIME OPTIONS FOR DEAR IMGUI
  // Runtime options (clipboard callbacks, enabling various features, etc.) can generally be set via
  // the ImGuiIO structure. You can use ImGui::SetAllocatorFunctions() before calling
  // ImGui::CreateContext() to rewire memory allocation functions.
  //-----------------------------------------------------------------------------
  // A) You may edit imconfig.h (and not overwrite it when updating imgui, or maintain a patch/branch
  // with your modifications to imconfig.h) B) or add configuration directives in your own file and
  // compile with #define IMGUI_USER_CONFIG "myfilename.h" If you do so you need to make sure that
  // configuration settings are defined consistently _everywhere_ dear imgui is used, which include
  // the imgui*.cpp files but also _any_ of your code that uses imgui. This is because some
  // compile-time options have an affect on data structures. Defining those options in imconfig.h will
  // ensure every compilation unit gets to see the same data structure layouts. Call
  // IMGUI_CHECKVERSION() from your .cpp files to verify that the data structures your files are using
  // are matching the ones imgui.cpp is using.
  //-----------------------------------------------------------------------------
  
  #pragma once
  
  //---- Define assertion handler. Defaults to calling assert().
  //#define IM_ASSERT(_EXPR)  MyAssert(_EXPR)
  //#define IM_ASSERT(_EXPR)  ((void)(_EXPR))     // Disable asserts
  
  //---- Define attributes of all API symbols declarations, e.g. for DLL under Windows.
  //#define IMGUI_API __declspec( dllexport )
  //#define IMGUI_API __declspec( dllimport )
  
  //---- Don't define obsolete functions/enums names. Consider enabling from time to time after
  // updating to avoid using soon-to-be obsolete function/names. #define
  // IMGUI_DISABLE_OBSOLETE_FUNCTIONS
  
  //---- Don't implement demo windows functionality
  //(ShowDemoWindow()/ShowStyleEditor()/ShowUserGuide() methods will be empty)
  //---- It is very strongly recommended to NOT disable the demo windows during development. Please
  // read the comments in imgui_demo.cpp. #define IMGUI_DISABLE_DEMO_WINDOWS
  
  //---- Don't implement some functions to reduce linkage requirements.
  //#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS   // [Win32] Don't implement default
  // clipboard handler. Won't use and link with OpenClipboard/GetClipboardData/CloseClipboard etc.
  //#define IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCTIONS         // [Win32] Don't implement default IME
  // handler. Won't use and link with ImmGetContext/ImmSetCompositionWindow. #define
  // IMGUI_DISABLE_FORMAT_STRING_FUNCTIONS             // Don't implement
  // ImFormatString/ImFormatStringV so you can implement them yourself if you don't want to link with
  // vsnprintf. #define IMGUI_DISABLE_MATH_FUNCTIONS                      // Don't implement
  // ImFabs/ImSqrt/ImPow/ImFmod/ImCos/ImSin/ImAcos/ImAtan2 wrapper so you can implement them yourself.
  // Declare your prototypes in imconfig.h. #define IMGUI_DISABLE_DEFAULT_ALLOCATORS // Don't
  // implement default allocators calling malloc()/free(). You will need to call
  // ImGui::SetAllocatorFunctions().
  
  //---- Include imgui_user.h at the end of imgui.h as a convenience
  //#define IMGUI_INCLUDE_IMGUI_USER_H
  
  //---- Pack colors to BGRA8 instead of RGBA8 (if you needed to convert from one to another anyway)
  //#define IMGUI_USE_BGRA_PACKED_COLOR
  
  //---- Avoid multiple STB libraries implementations, or redefine path/filenames to prioritize
  // another version
  // By default the embedded implementations are declared static and not available outside of imgui
  // cpp files.
  //#define IMGUI_STB_TRUETYPE_FILENAME   "my_folder/stb_truetype.h"
  //#define IMGUI_STB_RECT_PACK_FILENAME  "my_folder/stb_rect_pack.h"
  //#define IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
  //#define IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION
  
  //---- Define constructor and implicit cast operators to convert back<>forth from your math types
  // and ImVec2/ImVec4.
  // This will be inlined as part of ImVec2 and ImVec4 class declarations.
  /*
  #define IM_VEC2_CLASS_EXTRA                                                 \
          ImVec2(const MyVec2& f) { x = f.x; y = f.y; }                       \
          operator MyVec2() const { return MyVec2(x,y); }
  
  #define IM_VEC4_CLASS_EXTRA                                                 \
          ImVec4(const MyVec4& f) { x = f.x; y = f.y; z = f.z; w = f.w; }     \
          operator MyVec4() const { return MyVec4(x,y,z,w); }
  */
  
  //---- Use 32-bit vertex indices (default is 16-bit) to allow meshes with more than 64K vertices.
  // Render function needs to support it. #define ImDrawIdx unsigned int
  
  //---- Tip: You can add extra functions within the ImGui:: namespace, here or in your own headers
  // files.
  /*
  namespace ImGui
  {
      void MyFunction(const char* name, const MyMatrix44& v);
  }
  */
  