Vec2

java.lang.Object
- org.povclipse2.tools.image.hdr.Vec2

```
public class Vec2
extends java.lang.Object
```
A Vec2 represents a 2 component vector.

Author:

Peter Eastman

Field Summary

Fields
Modifier and Type Field and Description

double x

double y

Fields
Modifier and Type	Field and Description
`double`	`x`
`double`	`y`

Constructor Summary

Constructors
Constructor and Description
`Vec2()` Create a new Vec2 whose x and y components are equal to 0.0.
`Vec2(java.io.DataInputStream in)` Create a Vec2 by reading in information that was written by writeToFile().
`Vec2(double xval, double yval)` Create a new Vec2 with the specified x and y components.
`Vec2(Vec2 v)` Create a new Vec2 identical to another one.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`add(Vec2 v)` Add another Vec2 to this one.
`double`	`cross(Vec2 v)` Calculate the cross product of this vector with another one.
`double`	`distance(Vec2 v)` Calculate the Euclidean distance between this vector and another one.
`double`	`distance2(Vec2 v)` Calculate the square of the Euclidean distance between this vector and another one.
`double`	`dot(Vec2 v)` Calculate the dot product of this vector with another one.
`boolean`	`equals(Vec2 v)` Determine whether two vectors are identical.
`double`	`length()` Calculate the length of this vector.
`double`	`length2()` Calculate the square of the length of this vector.
`Vec2`	`minus(Vec2 v)` Calculate the difference between this vector and another one.
`void`	`normalize()` Scale each component of this vector so that it has a length of 1.
`Vec2`	`plus(Vec2 v)` Calculate the sum of this vector and another one.
`void`	`scale(double d)` Multiply each component of this vector by a constant.
`void`	`set(double xval, double yval)` Set the x and y components of this Vec2.
`void`	`subtract(Vec2 v)` Subtract another Vec2 from this one.
`Vec2`	`times(double d)` Create a new Vec2 by multiplying each component of this one by a constant.
`java.lang.String`	`toString()`
`static Vec2`	`vx()` Create a unit vector which points in the X direction.
`static Vec2`	`vy()` Create a unit vector which points in the Y direction.
`void`	`writeToFile(java.io.DataOutputStream out)` Write out a serialized representation of this object.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - x
```
public double x
```
  - y
```
public double y
```
- Constructor Detail
  - Vec2
```
public Vec2()
```
    Create a new Vec2 whose x and y components are equal to 0.0.
  - Vec2
```
public Vec2(double xval,
            double yval)
```
    Create a new Vec2 with the specified x and y components.
  - Vec2
```
public Vec2(Vec2 v)
```
    Create a new Vec2 identical to another one.
  - Vec2
```
public Vec2(java.io.DataInputStream in)
     throws java.io.IOException
```
    Create a Vec2 by reading in information that was written by writeToFile().
    
    Throws:
    
    java.io.IOException
- Method Detail
  - set
```
public final void set(double xval,
                      double yval)
```
    Set the x and y components of this Vec2.
  - dot
```
public final double dot(Vec2 v)
```
    Calculate the dot product of this vector with another one.
  - cross
```
public final double cross(Vec2 v)
```
    Calculate the cross product of this vector with another one. Because the cross product of a pair of Vec2's always points along the Z axis, this returns only its Z component.
  - plus
```
public final Vec2 plus(Vec2 v)
```
    Calculate the sum of this vector and another one.
  - minus
```
public final Vec2 minus(Vec2 v)
```
    Calculate the difference between this vector and another one.
  - times
```
public final Vec2 times(double d)
```
    Create a new Vec2 by multiplying each component of this one by a constant.
  - equals
```
public final boolean equals(Vec2 v)
```
    Determine whether two vectors are identical.
  - length
```
public final double length()
```
    Calculate the length of this vector.
  - length2
```
public final double length2()
```
    Calculate the square of the length of this vector.
  - add
```
public final void add(Vec2 v)
```
    Add another Vec2 to this one.
  - subtract
```
public final void subtract(Vec2 v)
```
    Subtract another Vec2 from this one.
  - scale
```
public final void scale(double d)
```
    Multiply each component of this vector by a constant.
  - distance
```
public final double distance(Vec2 v)
```
    Calculate the Euclidean distance between this vector and another one.
  - distance2
```
public final double distance2(Vec2 v)
```
    Calculate the square of the Euclidean distance between this vector and another one.
  - normalize
```
public final void normalize()
```
    Scale each component of this vector so that it has a length of 1. If this vector has a length of 0, this method has no effect.
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object
  - vx
```
public static Vec2 vx()
```
    Create a unit vector which points in the X direction.
  - vy
```
public static Vec2 vy()
```
    Create a unit vector which points in the Y direction.
  - writeToFile
```
public void writeToFile(java.io.DataOutputStream out)
                 throws java.io.IOException
```
    Write out a serialized representation of this object.
    
    Throws:
    
    java.io.IOException

Class Vec2

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

x

y

Constructor Detail

Vec2

Vec2

Vec2

Vec2

Method Detail

set

dot

cross

plus

minus

times

equals

length

length2

add

subtract

scale

distance

distance2

normalize

toString

vx

vy

writeToFile