Class tjh2dVector

java.lang.Object
  |
  +--tjh2dVector

public class tjh2dVector

extends java.lang.Object

A simple class that manages a 2D location/vector in space given floats x and y.

Field Summary

float	x the coordinates of the location/vector
float	y the coordinates of the location/vector

Constructor Summary

tjh2dVector()
default constructor

tjh2dVector(float a, float b)
initializing constructor

Method Summary

float	Angle() returns the angle of the vector anticlockwise from the +ve x-axis
static tjh2dVector	Cartesian(float degrees) return the unit vector with the correct angle anti-clockwise from the +ve x-axis
static float	DotProduct(tjh2dVector a, tjh2dVector b) returns the dot product of the two vectors
float	Length() returns the length of the vector
static tjh2dVector	minus(tjh2dVector a, tjh2dVector b) subtracts b from a, returns the result
static tjh2dVector	mult(tjh2dVector a, float f) multiplies the vector a by the scalar f, returns the result
tjh2dVector	Normalize() changes the length of the vector to one
tjh2dVector	Perp() replaces this vector with its left-hand perpendicular
void	RotateAround(tjh2dVector c, float deg) rotates this point by deg degrees around the point c
static tjh2dVector	sum(tjh2dVector a, tjh2dVector b) adds the two vectors together, returns the result

Methods inherited from class java.lang.Object

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

Field Detail

x

public float x

the coordinates of the location/vector

y

public float y

the coordinates of the location/vector

Constructor Detail

tjh2dVector

public tjh2dVector()

default constructor

tjh2dVector

public tjh2dVector(float a,
                   float b)

initializing constructor

Method Detail

DotProduct

public static float DotProduct(tjh2dVector a,
                               tjh2dVector b)

returns the dot product of the two vectors

RotateAround

public void RotateAround(tjh2dVector c,
                         float deg)

rotates this point by deg degrees around the point c

Perp

public tjh2dVector Perp()

replaces this vector with its left-hand perpendicular

Normalize

public tjh2dVector Normalize()

changes the length of the vector to one

Length

public float Length()

returns the length of the vector

Cartesian

public static tjh2dVector Cartesian(float degrees)

return the unit vector with the correct angle anti-clockwise from the +ve x-axis

Angle

public float Angle()

returns the angle of the vector anticlockwise from the +ve x-axis

sum

public static tjh2dVector sum(tjh2dVector a,
                              tjh2dVector b)

adds the two vectors together, returns the result

minus

public static tjh2dVector minus(tjh2dVector a,
                                tjh2dVector b)

subtracts b from a, returns the result

mult

public static tjh2dVector mult(tjh2dVector a,
                               float f)

multiplies the vector a by the scalar f, returns the result