Fix and simplify CMakeLists.txt source file glob

CMakeLists.txt

@@ -3,17 +3,12 @@
 project("RocketSim")
 
 # Add all headers and code files
-file(GLOB_RECURSE FILES_CPP "src/*.cpp")
-file(GLOB_RECURSE FILES_H "src/*.h")
+file(GLOB_RECURSE FILES_ROCKETSIM "src/*.cpp" "src/*.h")
 
 # Only include bullet headers when using MSVC, otherwise just code files
-if (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
-  file(GLOB FILES_BULLET "libsrc/bullet3-3.24/*.cpp" "libsrc/bullet3-3.24/*.h")
-else()
-  file(GLOB FILES_BULLET "libsrc/bullet3-3.24/*.cpp")
-endif()
+file(GLOB_RECURSE FILES_BULLET "libsrc/bullet3-3.24/*.cpp" "libsrc/bullet3-3.24/*.h")
 
-add_library(RocketSim ${FILES_CPP} ${FILES_H} ${FILES_BULLET})
+add_library(RocketSim ${FILES_ROCKETSIM} ${FILES_BULLET})
 
 set_target_properties(RocketSim PROPERTIES LINKER_LANGUAGE CXX)
 set_target_properties(RocketSim PROPERTIES CXX_STANDARD 20)