Fixed heissenbug caused by quat initialization and added sound server.

CMakeLists.txt

@@ -6,6 +6,8 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
 include(FindPkgConfig)
 find_package(glfw3 3.3 REQUIRED)
 find_package(OpenGL REQUIRED)
+find_package(SDL2 REQUIRED)
+include_directories(${SDL2_INCLUDE_DIRS})
 
 include_directories("src/")
 include_directories("gl/include")
@@ -30,4 +32,4 @@ set(SOURCE
         )
 
 add_executable(demo main.cpp gl/src/glad.c ${SOURCE} lib/easyloggingpp/src/easylogging++.cc)
-target_link_libraries(demo glfw OpenGL::GL)
+target_link_libraries(demo glfw OpenGL::GL ${SDL2_LIBRARIES})