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Public Member Functions | Static Public Member Functions

VBase2D Class Reference

This is the base class for all two-component vectors and points. More...

Inheritance diagram for VBase2D:
Point2D Vec2D

List of all members.

Public Member Functions

 VBase2D ()
 VBase2D (VBase2D const copy)
 VBase2D (double x, double y)
 VBase2D (double fill_value)
unsigned int addHash (unsigned int hash)
 Adds the vector into the running hash.
unsigned int addHash (unsigned int hash, double threshold)
 Adds the vector into the running hash.
 addToCell (int i, double value)
 addX (double value)
 addY (double value)
bool almostEqual (VBase2D const other)
 Returns true if two vectors are memberwise equal within a default tolerance based on the numeric type.
bool almostEqual (VBase2D const other, double threshold)
 Returns true if two vectors are memberwise equal within a specified tolerance.
int compareTo (VBase2D const other)
 This flavor of compare_to uses a default threshold value based on the numeric type.
int compareTo (VBase2D const other, double threshold)
 Sorts vectors lexicographically, componentwise.
double dot (VBase2D const other)
 fill (double fill_value)
 Sets each element of the vector to the indicated fill_value.
VBase2D fmax (VBase2D const other)
VBase2D fmin (VBase2D const other)
PyObject getattr (string attr_name)
 This is used to implement swizzle masks.
double getCell (int i)
 getData ()
 Returns the address of the first of the two data elements in the vector.
unsigned int getHash ()
 Returns a suitable hash for phash_map.
unsigned int getHash (double threshold)
 Returns a suitable hash for phash_map.
int getNumComponents ()
 Returns the number of elements in the vector, two.
double getX ()
double getY ()
bool isNan ()
 Returns true if any component of the vector is not-a-number, false otherwise.
double length ()
 Returns the length of the vector, by the Pythagorean theorem.
double lengthSquared ()
 Returns the square of the vector's length, cheap and easy.
bool normalize ()
 Normalizes the vector in place.
 operator new (unsigned int size)
bool operator!= (VBase2D const other)
VBase2D operator* (double scalar)
VBase2D operator*= (double scalar)
VBase2D operator+ (VBase2D const other)
VBase2D operator+= (VBase2D const other)
VBase2D operator- ()
VBase2D operator- (VBase2D const other)
VBase2D operator-= (VBase2D const other)
VBase2D operator/ (double scalar)
VBase2D operator/= (double scalar)
bool operator< (VBase2D const other)
 This performs a lexicographical comparison.
VBase2D operator= (VBase2D const copy)
VBase2D operator= (double fill_value)
bool operator== (VBase2D const other)
double operator[] (int i)
 operator[] (int i)
 output (ostream out)
VBase2D project (VBase2D const onto)
 Returns a new vector representing the projection of this vector onto another one.
 pythonRepr (ostream out, string class_name)
PyObject reduce (PyObject self)
 This special Python method is implement to provide support for the pickle module.
 set (double x, double y)
int setattr (PyObject self, string attr_name, PyObject assign)
 This is used to implement write masks.
 setCell (int i, double value)
 setitem (int i, double v)
 setX (double value)
 setY (double value)

Static Public Member Functions

static TypeHandle getClassType ()
static int size ()
 Returns 2: the number of components of a LVecBase2.
static VBase2D const unitX ()
 Returns a unit X vector.
static VBase2D const unitY ()
 Returns a unit Y vector.
static VBase2D const zero ()
 Returns a zero-length vector.

Detailed Description

This is the base class for all two-component vectors and points.


Constructor & Destructor Documentation

VBase2D ( )
VBase2D ( VBase2D const  copy)
VBase2D ( double  fill_value)
VBase2D ( double  x,
double  y 
)

Member Function Documentation

unsigned int addHash ( unsigned int  hash)

Adds the vector into the running hash.

unsigned int addHash ( unsigned int  hash,
double  threshold 
)

Adds the vector into the running hash.

addToCell ( int  i,
double  value 
)
addX ( double  value)
addY ( double  value)
bool almostEqual ( VBase2D const  other)

Returns true if two vectors are memberwise equal within a default tolerance based on the numeric type.

bool almostEqual ( VBase2D const  other,
double  threshold 
)

Returns true if two vectors are memberwise equal within a specified tolerance.

int compareTo ( VBase2D const  other)

This flavor of compare_to uses a default threshold value based on the numeric type.

int compareTo ( VBase2D const  other,
double  threshold 
)

Sorts vectors lexicographically, componentwise.

Returns a number less than 0 if this vector sorts before the other one, greater than zero if it sorts after, 0 if they are equivalent (within the indicated tolerance).

double dot ( VBase2D const  other)
fill ( double  fill_value)

Sets each element of the vector to the indicated fill_value.

This is particularly useful for initializing to zero.

VBase2D fmax ( VBase2D const  other)
VBase2D fmin ( VBase2D const  other)
PyObject getattr ( string  attr_name)

This is used to implement swizzle masks.

Reimplemented in Vec2D, and Point2D.

double getCell ( int  i)
static TypeHandle getClassType ( ) [static]

Reimplemented in Vec2D, and Point2D.

getData ( )

Returns the address of the first of the two data elements in the vector.

The next element occupies the next position consecutively in memory.

unsigned int getHash ( )

Returns a suitable hash for phash_map.

unsigned int getHash ( double  threshold)

Returns a suitable hash for phash_map.

int getNumComponents ( )

Returns the number of elements in the vector, two.

double getX ( )
double getY ( )
bool isNan ( )

Returns true if any component of the vector is not-a-number, false otherwise.

double length ( )

Returns the length of the vector, by the Pythagorean theorem.

double lengthSquared ( )

Returns the square of the vector's length, cheap and easy.

bool normalize ( )

Normalizes the vector in place.

Returns true if the vector was normalized, false if it was a zero-length vector.

operator new ( unsigned int  size)
bool operator!= ( VBase2D const  other)
VBase2D operator* ( double  scalar)

Reimplemented in Vec2D, and Point2D.

VBase2D operator*= ( double  scalar)
VBase2D operator+ ( VBase2D const  other)

Reimplemented in Vec2D, and Point2D.

VBase2D operator+= ( VBase2D const  other)
VBase2D operator- ( )

Reimplemented in Vec2D, and Point2D.

VBase2D operator- ( VBase2D const  other)

Reimplemented in Vec2D, and Point2D.

VBase2D operator-= ( VBase2D const  other)
VBase2D operator/ ( double  scalar)

Reimplemented in Vec2D, and Point2D.

VBase2D operator/= ( double  scalar)
bool operator< ( VBase2D const  other)

This performs a lexicographical comparison.

It's of questionable mathematical meaning, but sometimes has a practical purpose for sorting unique vectors, especially in an STL container. Also see compare_to().

VBase2D operator= ( double  fill_value)

Reimplemented in Vec2D, and Point2D.

VBase2D operator= ( VBase2D const  copy)

Reimplemented in Vec2D, and Point2D.

bool operator== ( VBase2D const  other)
operator[] ( int  i)
double operator[] ( int  i)
output ( ostream  out)
VBase2D project ( VBase2D const  onto)

Returns a new vector representing the projection of this vector onto another one.

The resulting vector will be a scalar multiple of onto.

Reimplemented in Vec2D, and Point2D.

pythonRepr ( ostream  out,
string  class_name 
)

Reimplemented in Vec2D, and Point2D.

PyObject reduce ( PyObject  self)

This special Python method is implement to provide support for the pickle module.

set ( double  x,
double  y 
)
int setattr ( PyObject  self,
string  attr_name,
PyObject  assign 
)

This is used to implement write masks.

Reimplemented in Vec2D, and Point2D.

setCell ( int  i,
double  value 
)
setitem ( int  i,
double  v 
)
setX ( double  value)
setY ( double  value)
static int size ( ) [static]

Returns 2: the number of components of a LVecBase2.

static VBase2D const unitX ( ) [static]

Returns a unit X vector.

Reimplemented in Vec2D, and Point2D.

static VBase2D const unitY ( ) [static]

Returns a unit Y vector.

Reimplemented in Vec2D, and Point2D.

static VBase2D const zero ( ) [static]

Returns a zero-length vector.

Reimplemented in Vec2D, and Point2D.

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