DoubleVector

java.lang.Object

drawit.DoubleVector

public class DoubleVector
extends Object

Constructor Summary

Constructors

Constructor Description

DoubleVector(double x, double y)

Method Summary

Modifier and Type	Method	Description
`double`	`asAngle()`	Returns the angle from positive X to this vector, in radians.
`double`	`crossProduct(DoubleVector other)`	Returns the cross product of this vector and the given vector.
`double`	`dotProduct(DoubleVector other)`	Returns the dot product of this vector and the given vector.
`double`	`getSize()`
`double`	`getX()`
`double`	`getY()`
`DoubleVector`	`plus(DoubleVector other)`
`DoubleVector`	`scale(double d)`	Returns a `DoubleVector` object whose coordinates are obtained by multiplying this vector's coordinates by the given scale factor.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- DoubleVector
  
  public DoubleVector(double x, double y)
Method Details
- getX
  
  public double getX()
- getY
  
  public double getY()
- scale
  
  public DoubleVector scale(double d)
  
  Returns a DoubleVector object whose coordinates are obtained by multiplying this vector's coordinates by the given scale factor.
- plus
  
  public DoubleVector plus(DoubleVector other)
- getSize
  
  public double getSize()
- dotProduct
  
  public double dotProduct(DoubleVector other)
  
  Returns the dot product of this vector and the given vector.
  Postconditions:
  result == this.getX() * other.getX() + this.getY() * other.getY()
- crossProduct
  
  public double crossProduct(DoubleVector other)
  
  Returns the cross product of this vector and the given vector.
  Postconditions:
  result == this.getX() * other.getY() - this.getY() * other.getX()
- asAngle
  
  public double asAngle()
  
  Returns the angle from positive X to this vector, in radians. The angle from positive X to positive Y is Math.PI / 2; the angle from positive X to negative Y is -Math.PI / 2.
  Implementation Hint: See Math.atan2(double, double).