first commit

src/imgui.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "COMMON.h"
+
+#define IMGUI_IMPL_OPENGL_LOADER_CUSTOM
+#include <imgui/imgui.h>
+#include <imgui/imgui_impl_sdl3.h>
+#include <imgui/imgui_impl_opengl3.h>
+
+#define IMGUI_DRAG_SPEED 1.0
+
+void imgui_init(SDL_Window* window, SDL_GLContext glContext);
+void imgui_tick(State* state);
+void imgui_draw();
+void imgui_free();