// datread.java   read Utah Graphics .dat file  3D
//                all data available
import java.io.*;
import java.util.*;
import java.text.*;

public class datread
{
  public class dpts
  {
    double x, y, z;
    dpts(double x, double y, double z)
    {
      this.x = x;
      this.y = y;
      this.z = z;
    }
  } // end class dpts

  boolean debug = false;
  int num_points;
  int num_polys;
  dpts data_points[] = new dpts[5000];
  int  data_polys[] = new int[10000];

  datread(String filename)
  {
    double x, y, z;
    int k, vn, pts;
    StringTokenizer T;
    String token;

    System.out.println("datread.java reading "+filename);

    try
    {
      FileReader fin = new FileReader(filename);
      BufferedReader in = new BufferedReader(fin);
      String input_line;
      String line;
      double amount;
      int len;
      int index;
      int last;
   
      input_line = in.readLine(); // npts npoly
      if(debug) System.out.println("input:"+input_line);
      len = input_line.length();
      if(input_line.substring(0,1).equals(" ")) 
      {
        input_line = input_line.substring(1,len);
        if(debug) System.out.println("short input:"+input_line);
      }
      len = input_line.length();
      if(debug) System.out.println("length="+len);
 
      index = 0; // num_points
      if(debug) System.out.println("num_points index="+index);
      last = input_line.indexOf(' ',index);
      if(debug) System.out.println("num_index last="+last);
      if(debug) System.out.println(input_line.substring(index,last)+
			 "| len="+(input_line.substring(index,last).length()));
      num_points = Integer.parseInt(input_line.substring(index,last));
      if(debug) System.out.println("num_points="+num_points);
      data_points = new dpts[num_points];

      index = input_line.indexOf(' ',index); // num_polys
      if(debug) System.out.println("num_polys index="+index);
      last = input_line.indexOf(' ',index+1);
      if(last==-1) last = input_line.length();
      if(debug) System.out.println("num_polys last="+last);
      if(debug) System.out.println(input_line.substring(index+1,last));
      num_polys = Integer.parseInt(input_line.substring(index+1,last));
      if(debug) System.out.println("num_polys="+num_polys);
      data_polys = new int[11*num_polys+100];

      // read data points, x, y, z
      if(debug) System.out.println("reading x, y, z data points"); 
      for(int n_input=0; n_input<num_points; n_input++)
      {
        input_line = in.readLine();
        len = input_line.length();
        if(input_line.substring(0,1).equals(" ")) 
        {
          input_line = input_line.substring(1,len);
          if(debug) System.out.println("short input:"+input_line);
        }
        if(debug) System.out.println(input_line); 
        T = new StringTokenizer(input_line," ");
        token = T.nextToken(); // x
        amount = Double.parseDouble(token);
        if(debug && n_input<5) System.out.println("x amount="+amount);
        x = amount;
        token = T.nextToken(); // y
        amount = Double.parseDouble(token);
        if(debug && n_input<10) System.out.println("y amount="+amount);
        y = amount;
        token = T.nextToken(); // z
        amount = Double.parseDouble(token);
        if(debug && n_input<10) System.out.println("z amount="+amount);
        z = amount;
        data_points[n_input] = new dpts(x, y, z);

      } // end n_input

      // read polygon size, points
      if(debug) System.out.println("reading "+num_polys+" polygons");
      k = 0; // index into data_polys
      for(int i=0; i<num_polys; i++)
      {
        line = in.readLine();
        len = input_line.length();
        if(input_line.substring(0,1).equals(" ")) 
        {
          input_line = input_line.substring(1,len);
        }
        if(debug) System.out.println(line);  // optional 
        T = new StringTokenizer(line," ");
        token = T.nextToken(); // pts
        pts = Integer.parseInt(token);
        if(debug && i==0) System.out.println("pts="+pts);
        data_polys[k++] = pts;
        for(int j=0; j<pts; j++) // get vertex numbers, 1 based
        {
          token = T.nextToken();
          vn = Integer.parseInt(token);
          if(debug && i==0) System.out.println("vert"+j+"="+vn);
          data_polys[k++] = vn;
        } // end get v
      } // end i num_polys 

    } // end try
    catch(IOException exception)
    {
      System.out.println("datread.java "+exception);
    }
    if(debug) System.out.println("readdata finished");
  } // end datread
} // end class datread