CMake poking

.gitmodules

 [submodule "libs/googletest"]
 	path = libs/googletest
 	url = https://github.com/google/googletest.git
+[submodule "libs/imgui"]
+	path = libs/imgui
+	url = https://github.com/armin-co/imgui.git
+[submodule "libs/cpp_starter_project"]
+	path = libs/cpp_starter_project
+	url = https://github.com/armin-co/cpp_starter_project.git
\ No newline at end of file

CMakeLists.txt

@@ -23,8 +23,9 @@ find_package(PkgConfig REQUIRED)
 
 # Add qpong lib for core qpong functionality
 add_subdirectory(qpong_core)
-include_directories(qpong_core)
 
+# Dear ImGui based application
+add_subdirectory(imgui_app)
 
 # Add dir with gtk qpong app
 add_subdirectory(gtk_qpong_app)

gtk_qpong_app/CMakeLists.txt

@@ -13,6 +13,7 @@ link_directories(${GTKMM_LIBRARY_DIRS})
 
 # get all GTKMM dependencies and configuration
 include_directories(${GTKMM_INCLUDE_DIRS})
+include_directories(../qpong_core)
 
 if(APPLE)
     include_directories(/usr/local/include)
@@ -28,16 +29,9 @@ add_executable( qpong.app
 )
 
 
-# we do need some threads
-find_package(Threads)
-
-
 # link all necessary libs to the target
 target_link_libraries( qpong.app 
     qpong_core
-    ${CMAKE_THREAD_LIBS_INIT}
     ${GTKMM_LIBRARIES}
-    fftw3
-    fftw3_omp
     m # math
 )

imgui_app/CMakeLists.txt

+# Specific settings for macOS
+if(APPLE)
+    link_directories("/usr/local/lib")
+    message("ATTENTION: You probably have to export the PKG_CONFIG_PATH.")
+    message("For example: export PKG_CONFIG_PATH=\"/usr/local/lib:/usr/local/opt/zlib/lib/pkgconfig\"")
+endif()
+
+
+add_executable(imgui_playground.app 
+imgui_playground.cpp)
\ No newline at end of file

imgui_app/imgui_playground.cpp

+/// @file   imgui_playground.cppp
+/// @author Armin Co
+/// @brief  Working example for Dear ImGui with OpenGL3 and SDL2
+///
+
+
+int main(void)
+{
+
+    return 0;
+}
\ No newline at end of file

cpp_starter_project @ d7a2b6b8

+Subproject commit d7a2b6b891d75edc68c9d88dca7e24cd73e378b8

imgui @ ae936913

+Subproject commit ae93691360ad28e6c217138ead55c874dda26f80

qpong_core/CMakeLists.txt

@@ -5,3 +5,11 @@ endif()
 
 # Core QPong library
 add_library(qpong_core Particle.cpp ImageBuffer.cpp Player.cpp)
+
+find_package(Threads)
+
+target_link_libraries( qpong_core
+    ${CMAKE_THREAD_LIBS_INIT}
+    fftw3
+    fftw3_omp
+)
\ No newline at end of file