# include <cstdlib>
# include <iostream>
# include <iomanip>
# include <cmath>

using namespace std;

# include "dislin.H"

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

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

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

//******************************************************************************
//
//  Purpose:
//
//    MAIN demonstrates the use of the CURVE routine.
//
//  Modified:
// 
//    03 September 2005
//
{
# define N 100

  double fpi = 3.1415927 / 180.0;
  int i;
  int j;
  double step;
  double x;
  double y;
  float zmat[N][N];

  cout << "\n";
  cout << "DISLIN_EX09:\n";
  cout << "  Demonstrate the creation of a 3D color plot.\n";

  step = 360.0 / ( float ) ( N - 1 );
  for ( i = 0; i < N; i++ )
  {
    x = ( float ) i * step;
    for ( j = 0; j < N; j++ )
    {
      y = ( float ) j * step;
      zmat[i][j] = 2.0 * sin ( x * fpi ) * sin ( y * fpi );
    }
  }
//
//  Specify the format of the output file.
//
  metafl ( "PNG" );
//
//  Specify the name of the output graphics file.
//
  setfil ( "dislin_ex09.png" );

  disini ( );
  pagera ( );
  hwfont ( );

  titlin ( "3-D Color Plot of the Function", 2 );
  titlin ( "F(X,Y) = 2 * SIN(X) * SIN(Y)", 4 );

  name ( "X-axis", "x" );
  name ( "Y-axis", "y" );
  name ( "Z-axis", "z" );

  intax ( );
  autres ( N, N );
  axspos ( 300, 1850 );
  ax3len ( 2200, 1400, 1400 );

  graf3 ( 0.0, 360.0, 0.0, 90.0, 0.0, 360.0, 0.0, 90.0, -2.0, 2.0, -2.0, 1.0 );
  crvmat ( (float *) zmat, N, N, 1, 1 );
  
  height ( 50 );
  title ( );
  mpaepl ( 3 );
  disfin ( );

  cout << "\n";
  cout << "DISLIN_EX09:\n";
  cout << "  Normal end of execution.\n";

  return 0;
}