10. OpenGL State Machine

• In OpenGL, we are always turning features on and off with glEnable() and glDisable()

• By default, everything is disabled

• For example:

  
      glEnable( GL_DEPTH_TEST );
      .
      .
      .
      glDisable( GL_DEPTH_TEST );
  
  

• Note: you can always determine if something is on with

  
      GLboolean glIsEnabled( GLenum );