add imgui library

1 files changed, 27 insertions, 0 deletions

diff --git a/3rdparty/imgui/examples/imgui_impl_freeglut.h b/3rdparty/imgui/examples/imgui_impl_freeglut.h
new file mode 100644
index 00000000..6289ed4d
--- /dev/null
+++ b/3rdparty/imgui/examples/imgui_impl_freeglut.h
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+// dear imgui: Platform Binding for FreeGLUT
+// This needs to be used along with a Renderer (e.g. OpenGL2)
+
+// Issues:
+//  [ ] Platform: GLUT is unable to distinguish e.g. Backspace from CTRL+H or TAB from CTRL+I
+//  [ ] Platform: Missing gamepad support.
+
+// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// https://github.com/ocornut/imgui
+
+IMGUI_IMPL_API bool     ImGui_ImplFreeGLUT_Init();
+IMGUI_IMPL_API void     ImGui_ImplFreeGLUT_InstallFuncs();
+IMGUI_IMPL_API void     ImGui_ImplFreeGLUT_Shutdown();
+IMGUI_IMPL_API void     ImGui_ImplFreeGLUT_NewFrame();
+
+// You can call ImGui_ImplFreeGLUT_InstallFuncs() to get all those functions installed automatically,
+// or call them yourself from your own GLUT handlers. We are using the same weird names as GLUT for consistency..
+//---------------------------------------- GLUT name --------------------------------------------- Decent Name ---------
+IMGUI_IMPL_API void     ImGui_ImplFreeGLUT_ReshapeFunc(int w, int h);                           // ~ ResizeFunc
+IMGUI_IMPL_API void     ImGui_ImplFreeGLUT_MotionFunc(int x, int y);                            // ~ MouseMoveFunc
+IMGUI_IMPL_API void     ImGui_ImplFreeGLUT_MouseFunc(int button, int state, int x, int y);      // ~ MouseButtonFunc
+IMGUI_IMPL_API void     ImGui_ImplFreeGLUT_MouseWheelFunc(int button, int dir, int x, int y);   // ~ MouseWheelFunc
+IMGUI_IMPL_API void     ImGui_ImplFreeGLUT_KeyboardFunc(unsigned char c, int x, int y);         // ~ CharPressedFunc
+IMGUI_IMPL_API void     ImGui_ImplFreeGLUT_KeyboardUpFunc(unsigned char c, int x, int y);       // ~ CharReleasedFunc
+IMGUI_IMPL_API void     ImGui_ImplFreeGLUT_SpecialFunc(int key, int x, int y);                  // ~ KeyPressedFunc
+IMGUI_IMPL_API void     ImGui_ImplFreeGLUT_SpecialUpFunc(int key, int x, int y);                // ~ KeyReleasedFunc