OpenGL State Machine o Open gL is a finite state machine predetermined and countable number of different states e The graphics system behaviors are determined by these system state, which can be modified by calling openGL functions The Open gl state includes e The current color or other attributes MatrixMode(GL PROJECTION) o The current model viewing transformations g denty( ) gluortho2D(…) The current camera model clipping e The current lighting reflectance mo ● The current viewport All have default values, remaining until a new setting on itOpenGL State Machine  OpenGL is a finite state machine  A predetermined and countable number of different states  The graphics system behaviors are determined by these system state, which can be modified by calling OpenGL functions.  The OpenGL state includes:  The current color or other attributes  The current model & viewing transformations  The current camera model & clipping  The current lighting & reflectance model  The current viewport  All have default values, remaining until a new setting on it. … glMatrixMode (GL_PROJECTION); glLoadIdentity( ); gluOrtho2D( … ); … 5