CMSC 740 - Computer Graphics

File: sample.c

/*-----------------------------------------------------------------------
This is the main file that defines all the globals and starts everything.
-------------------------------------------------------------------------*/
#include "sample.h"

void
main(int ac, char** av)
{

   char                 filename[128];

   init_display(ac, av);

#if 0
   deal_with_options(ac,av, filename);  /* set the filename */

   input_dataset(filename);             /* read in the dataset */
#endif

   loop_display();
}


/*--------------------------------------------------------------------------
prints out the usage
----------------------------------------------------------------------------*/
void usage(char  *prog_name)
{
   fprintf(stderr,"usage: %s \n", prog_name);
   exit(1);
}

/*----------------------------------------------------------------------------
deal_with_options intializes the various command line parameters mentioned above
-----------------------------------------------------------------------------*/
void deal_with_options(int ac, char **av, char* filename)
{
   char 	*s;
   int	 	argumentOk=0;
   char		*prog_name;

   prog_name = av[0];
   while (--ac > 0 )
   {
      if ((*++av)[0]=='-'){
          for (s = av[0]+1; *s; s++)  switch (*s) {
	   case '?':
	       usage(prog_name);
	       break;
	   default:
	       break;
         };     /*of switch */ 
       }   /* of if */ 
       else {
	   sprintf((char *) filename, "%s", *av); 
	   argumentOk+=1;
       }
    }
    if (argumentOk!=1) usage(prog_name);
}

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