Class DVector

java.lang.Object
   |
   +----DVector

class DVector

extends Object

DVector()

Create a new DVector with unspecified coordinates (actually I think the coords are initialized to 0, but don't count on this).

DVector(double, double)

Create a new DVector with given coordinates.

array(double, double)

Construct an array of DVectors; the array method takes 2,4,6, or 8 doubles, and returns an array of 1,2,3, or 4 DVectors, respectively.

array(double, double, double, double)

array(double, double, double, double, double, double)

array(double, double, double, double, double, double, double, double)

aString(DVector[])

Convert an array of DVectors to a string.

copy()

Return a copy of this vector.

dot(DVector)

Return the dot product of this vector with another one.

length()

Return the length (magnitude) of this DVector (sqrt(x^2 + y^2))

negate()

Multiply this vector by -1.

scale(double)

Multiply this vector by the scalar s.

toString()

Convert a DVector to a String

  public DVector(double x,
                 double y)

Create a new DVector with given coordinates.

  public DVector()

Create a new DVector with unspecified coordinates (actually I think the coords are initialized to 0, but don't count on this).

  public String toString()

Convert a DVector to a String

Overrides:

toString in class Object

  public double length()

Return the length (magnitude) of this DVector (sqrt(x^2 + y^2))

  public void negate()

Multiply this vector by -1.

  public void scale(double s)

Multiply this vector by the scalar s.

  public double dot(DVector v)

Return the dot product of this vector with another one.

  public DVector copy()

Return a copy of this vector.

  public static DVector[] array(double x0,
                                double y0)

Construct an array of DVectors; the array method takes 2,4,6, or 8 doubles, and returns an array of 1,2,3, or 4 DVectors, respectively.

  public static DVector[] array(double x0,
                                double y0,
                                double x1,
                                double y1)

  public static DVector[] array(double x0,
                                double y0,
                                double x1,
                                double y1,
                                double x2,
                                double y2)

  public static DVector[] array(double x0,
                                double y0,
                                double x1,
                                double y1,
                                double x2,
                                double y2,
                                double x3,
                                double y3)

  public static String aString(DVector v[])

Convert an array of DVectors to a string.

The Geometry Center Home Page

Author: Mark Phillips
Comments to: webmaster@geom.umn.edu
Created: Sep 16 1996 --- Last modified: Sep 18 1996