# include <stdio.h>
# include <math.h>

# include "dislin.h"

int main ( int argc, char *argv[] );

/******************************************************************************/

int main ( int argc, char *argv[] )

/******************************************************************************/
/*
  Purpose:

    MAIN demonstrates the use of shade patterns.

  Modified:
 
    03 September 2005
*/
{
  static char cstr[3];
  static char *ctit = "Shading Patterns (AREAF)";
  int i;
  int iclr;
  int ii;
  static int ix[4] = { 0, 300, 300, 0 };
  int ixp[4];
  static int iy[4] = {0, 0, 400, 400 };
  int iyp[4];
  int j;
  int k;
  int nl;
  int nx;
  int nx0 = 335;
  int ny;
  int ny0 = 350;

  printf ( "\n" );
  printf ( "DISLIN_EX08:\n" );
  printf ( "  Demonstrate the use of shade patterns.\n" );

/*
  Specify the format of the output file.
*/
  metafl ( "PNG" );
/*
  Specify the name of the output graphics file.
*/
  setfil ( "dislin_ex08.png" );

  disini ( );
  pagera ( );
  complx ( );
  setvlt ( "small" );

  height ( 50 );
  nl = nlmess ( ctit );
  nx = ( 2970 - nl ) / 2 ;
  messag ( ctit, nx, 200 );

  iclr = 0;
  for ( i = 0; i < 3; i++ )
  {
    ny = ny0 + i * 600;
    for ( j = 0; j < 6; j++ )
    {
      nx = nx0 + j * 400;
      ii = i * 6 + j;
      shdpat ( (long) ii );
      sprintf ( cstr, "%d", ii );

      iclr = iclr % 16;
      iclr = iclr + 1;
      setclr ( iclr );

      for ( k = 0; k < 4; k++ )
      {
        ixp[k] = ix[k] + nx;
        iyp[k] = iy[k] + ny;
      }
      areaf ( ixp, iyp, 4 );

      nl = nlmess ( cstr );
      nx = nx + ( 300 - nl ) / 2;
      messag ( cstr, nx, ny+460 );
    }
  }

  disfin();

  printf ( "\n" );
  printf ( "DISLIN_EX08:\n" );
  printf ( "  Normal end of execution.\n" );

  return 0;
}