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Class figPac.PointList

java.lang.Object
   |
   +----java.awt.Polygon
           |
           +----figPac.PointList

public class PointList
extends Polygon

A PointList is just a list of points, with a point being an array of two doubles. Eventually, this will be extended to allow for points in more than two dimensions.

x
y

PointList(): Creates an empty PointList.
PointList(double[], double[], int): Creates an PointList containing npoints points whose x coordinates are given in the first argument and whose y coordinates are given in the second argument.
PointList(double[][], int): Creates an PointList containing npoints points whose x and y coordinates are given as a two dimensional array in the first argument.
PointList(int): Creates an PointList containing npoints unspecified points.

add(double, double): Appends a point to the list.
print(): Prints the points in the list to standard out.
print(int, int, int, int): Formats and prints the points in the list to standard out.
print(int, int, int, int, int): Formats and prints the first nopoints in the list to standard out.
toFile(String, int, int, int, int): Formats and prints the points in the list to a file.
toFile(String, int, int, int, int, int): Formats and prints the points in the list to a file.
transform(double[][]): Applies the affine linear map determined by the 2x3 matrix of the argument to all points in the list.

 public double x[]

 public double y[]

PointList

 public PointList()

Creates an empty PointList.

PointList

 public PointList(int npoints)

Creates an PointList containing npoints unspecified points.

PointList

 public PointList(double x[],
                  double y[],
                  int npoints)

Creates an PointList containing npoints points whose x coordinates are given in the first argument and whose y coordinates are given in the second argument.

PointList

 public PointList(double xy[][],
                  int npoints)

Creates an PointList containing npoints points whose x and y coordinates are given as a two dimensional array in the first argument.

add

 public void add(double xx,
                 double yy)

Appends a point to the list.

transform

 public void transform(double tm[][])

Applies the affine linear map determined by the 2x3 matrix of the argument to all points in the list. The new x and y coordinates of each point are

oldx*tm[0][0]+oldy*tm[0][1]+tm[0][2] ;
oldx*tm[1][0]+oldy*tm[1][1]+tm[1][2] ;

print

 public void print()

Prints the points in the list to standard out.

print

 public void print(int xwidth,
                   int xprecision,
                   int ywidth,
                   int yprecision)

Formats and prints the points in the list to standard out.

Parameters:: xwidth - The minimum length of the formatted string for x.; xprecision - The number of digits to follow the decimal point in x.; ywidth - The minimum length of the formatted string for y.; yprecision - The number of digits to follow the decimal point in y.

print

 public void print(int xwidth,
                   int xprecision,
                   int ywidth,
                   int yprecision,
                   int nopoints)

Formats and prints the first nopoints in the list to standard out.

Parameters:: xwidth - The minimum length of the formatted string for x.; xprecision - The number of digits to follow the decimal point in x.; ywidth - The minimum length of the formatted string for y.; yprecision - The number of digits to follow the decimal point in y.; nopoints - The number of points to be output.

toFile

 public void toFile(String file,
                    int xwidth,
                    int xprecision,
                    int ywidth,
                    int yprecision)

Formats and prints the points in the list to a file. Any attempt to use this method in an applet will be rejected with a security exception.

Parameters:: file - The file name.; xwidth - The minimum length of the formatted string for x.; xprecision - The number of digits to follow the decimal point in x.; ywidth - The minimum length of the formatted string for y.; yprecision - The number of digits to follow the decimal point in y.

toFile

 public void toFile(String file,
                    int xwidth,
                    int xprecision,
                    int ywidth,
                    int yprecision,
                    int nopoints)

Formats and prints the points in the list to a file. Any attempt to use this method in an applet will be rejected with a security exception.

Parameters:: file - The file name.; xwidth - The minimum length of the formatted string for x.; xprecision - The number of digits to follow the decimal point in x.; ywidth - The minimum length of the formatted string for y.; yprecision - The number of digits to follow the decimal point in y.; nopoints - The number of points to be output.

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