// datwrite.java  write Utah Graphics ASCII data *.dat
//                to be read by datread.java
import java.io.*;
import java.util.*;
import java.text.*;

public class datwrite
{
  public datwrite(String filename, double data_points[][],
                  int num_points, int data_polys[], int num_polys)
  {
    int k, pt, pts;
    Boolean debug = false;

    try
    {
      BufferedWriter out = new BufferedWriter(new FileWriter(filename));
      PrintWriter File_out = new PrintWriter(out);

      if(debug) System.out.println("opened "+filename+" for writing");

      File_out.println(num_points+" "+num_polys+" ");
      System.out.println("write num_points="+num_points);
      for(int i=0; i<num_points; i++)
      {
	File_out.println(data_points[i][0]+" "+
                         +data_points[i][1]+" "+data_points[i][2]+" ");
      }

      // use num_polys to write out surfaces 
      System.out.println("write num_polys="+num_polys);
      k = 0;
      for(int i=0; i<num_polys; i++)
      {
        pts = data_polys[k++];
        if(debug) System.out.println("poly="+i+", pts="+pts);
        File_out.print(pts);
        for(int j=0; j<pts; j++)
        {
          pt = data_polys[k++];
          File_out.print(" "+pt);
        }
        File_out.println(" ");
      }
      File_out.close();
    } // end try
    catch(IOException exception)
    {
      System.out.println("datwrite.java "+exception);
    }
    if(debug) System.out.println("datwrite.java finished writing "+filename);
  } // end datawrite
}  // end datwrite.java