cmake: Adding dearImGui

CMakeLists.txt

@@ -7,6 +7,14 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
+if(WIN32)
+  set(IMGUI_BACKEND "imgui_impl_dx11.cpp")  # DirectX 11 for Windows
+elseif(APPLE)
+  set(IMGUI_BACKEND "imgui_impl_metal.mm")  # Metal for macOS
+elseif(UNIX)
+  set(IMGUI_BACKEND "imgui_impl_opengl3.cpp")  # OpenGL for Linux
+endif()
+
 # Copying assets
 file(COPY "${CMAKE_SOURCE_DIR}/assets" DESTINATION "${CMAKE_BINARY_DIR}")
 
@@ -30,6 +38,25 @@ if (NOT raylib_POPULATED)
 	add_subdirectory(${raylib_SOURCE_DIR} ${raylib_BINARY_DIR})
 endif()
 
+# imgui
+FetchContent_Declare(
+  imgui
+  GIT_REPOSITORY https://github.com/ocornut/imgui.git
+  GIT_TAG docking
+)
+
+FetchContent_MakeAvailable(imgui)
+
+set(imgui_SOURCE_DIR ${CMAKE_BINARY_DIR}/_deps/imgui-src)
+
+# rlimgui
+FetchContent_Declare(
+  rlImGui
+  GIT_REPOSITORY https://github.com/raylib-extras/rlImGui.git
+  GIT_TAG main
+)
+FetchContent_MakeAvailable(rlImGui)
+set(rlImGui_SOURCE_DIR ${CMAKE_BINARY_DIR}/_deps/rlimgui-src)
 
 # nlohmann::json
 FetchContent_Declare(
@@ -43,6 +70,12 @@ include_directories(${imgui_SOURCE_DIR} ${rlImGui_SOURCE_DIR})
 
 set(SRC_CXX_FILES	"./srcs/main.cpp"
 									"./srcs/Model.cpp"
+                  "${rlImGui_SOURCE_DIR}/rlImGui.cpp"
+                  "${imgui_SOURCE_DIR}/imgui.cpp"
+                  "${imgui_SOURCE_DIR}/imgui_draw.cpp"
+                  "${imgui_SOURCE_DIR}/imgui_widgets.cpp"
+                  "${imgui_SOURCE_DIR}/imgui_tables.cpp"
+                  "${imgui_SOURCE_DIR}/backends/${IMGUI_BACKEND}"
 )
 
 add_executable(${NAME} ${SRC_CXX_FILES})