//Got this from one of Apple's example :)  Extremely nice little function that checks for OpenGL errors easily.  Put this between every OpenGL function to see which line's generating the error
#define GetGLError()                                    \
{                                                       \
GLenum err = glGetError();                          \
while (err != GL_NO_ERROR) {                        \
NSLog(@"GLError %s set in File:%s Line:%d\n",   \
GetGLErrorString(err),                  \
__FILE__,                               \
__LINE__);                              \
err = glGetError();                             \
}                                                   \
}

static inline const char * GetGLErrorString(GLenum error)
{
    const char *str;
    switch( error )
    {
        case GL_NO_ERROR:
            str = "GL_NO_ERROR";
            break;
        case GL_INVALID_ENUM:
            str = "GL_INVALID_ENUM";
            break;
        case GL_INVALID_VALUE:
            str = "GL_INVALID_VALUE";
            break;
        case GL_INVALID_OPERATION:
            str = "GL_INVALID_OPERATION";
            break;
#if defined __gl_h_ || defined __gl3_h_
        case GL_OUT_OF_MEMORY:
            str = "GL_OUT_OF_MEMORY";
            break;
        case GL_INVALID_FRAMEBUFFER_OPERATION:
            str = "GL_INVALID_FRAMEBUFFER_OPERATION";
            break;
#endif
#if defined __gl_h_
        case GL_STACK_OVERFLOW:
            str = "GL_STACK_OVERFLOW";
            break;
        case GL_STACK_UNDERFLOW:
            str = "GL_STACK_UNDERFLOW";
            break;
        case GL_TABLE_TOO_LARGE:
            str = "GL_TABLE_TOO_LARGE";
            break;
#endif
        default:
            str = "(ERROR: Unknown Error Enum)";
            break;
    }
    return str;
}