static PFNGLCREATESHADERPROC glCreateShader_func = NULL;
static PFNGLDELETEPROGRAMPROC glDeleteProgram_func = NULL;
static PFNGLDELETESHADERPROC glDeleteShader_func = NULL;
+static PFNGLGETACTIVEATTRIBPROC glGetActiveAttrib_func = NULL;
static PFNGLGETATTACHEDSHADERSPROC glGetAttachedShaders_func = NULL;
static PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation_func = NULL;
static PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog_func = NULL;
glCreateShader_func = (PFNGLCREATESHADERPROC) glutGetProcAddress("glCreateShader");
glDeleteProgram_func = (PFNGLDELETEPROGRAMPROC) glutGetProcAddress("glDeleteProgram");
glDeleteShader_func = (PFNGLDELETESHADERPROC) glutGetProcAddress("glDeleteShader");
+ glGetActiveAttrib_func = (PFNGLGETACTIVEATTRIBPROC) glutGetProcAddress("glGetActiveAttrib");
glGetAttachedShaders_func = (PFNGLGETATTACHEDSHADERSPROC) glutGetProcAddress("glGetAttachedShaders");
glGetAttribLocation_func = (PFNGLGETATTRIBLOCATIONPROC) glutGetProcAddress("glGetAttribLocation");
glGetProgramInfoLog_func = (PFNGLGETPROGRAMINFOLOGPROC) glutGetProcAddress("glGetProgramInfoLog");