Panda3D
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This is the base class for all two-component vectors and points. More...
#include "lvecBase2.h"
Public Types | |
typedef const double * | const_iterator |
typedef const double * | iterator |
Public Member Functions | |
LVecBase2d (const LVecBase2d ©) | |
LVecBase2d (double fill_value) | |
LVecBase2d (double x, double y) | |
size_t | add_hash (size_t hash) const |
Adds the vector into the running hash. | |
size_t | add_hash (size_t hash, double threshold) const |
Adds the vector into the running hash. | |
void | add_to_cell (int i, double value) |
void | add_x (double value) |
void | add_y (double value) |
bool | almost_equal (const LVecBase2d &other, double threshold) const |
Returns true if two vectors are memberwise equal within a specified tolerance. | |
bool | almost_equal (const LVecBase2d &other) const |
Returns true if two vectors are memberwise equal within a default tolerance based on the numeric type. | |
iterator | begin () |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style. | |
const_iterator | begin () const |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style. | |
int | compare_to (const LVecBase2d &other) const |
This flavor of compare_to uses a default threshold value based on the numeric type. | |
int | compare_to (const LVecBase2d &other, double threshold) const |
Sorts vectors lexicographically, componentwise. | |
double | dot (const LVecBase2d &other) const |
iterator | end () |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style. | |
const_iterator | end () const |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style. | |
void | fill (double fill_value) |
Sets each element of the vector to the indicated fill_value. | |
LVecBase2d | fmax (const LVecBase2d &other) |
LVecBase2d | fmin (const LVecBase2d &other) |
void | generate_hash (ChecksumHashGenerator &hashgen) const |
Adds the vector to the indicated hash generator. | |
void | generate_hash (ChecksumHashGenerator &hashgen, double threshold) const |
Adds the vector to the indicated hash generator. | |
double | get_cell (int i) const |
const double * | get_data () const |
Returns the address of the first of the two data elements in the vector. | |
size_t | get_hash () const |
Returns a suitable hash for phash_map. | |
size_t | get_hash (double threshold) const |
Returns a suitable hash for phash_map. | |
int | get_num_components () const |
Returns the number of elements in the vector, two. | |
double | get_x () const |
double | get_y () const |
bool | is_nan () const |
Returns true if any component of the vector is not-a-number, false otherwise. | |
double | length () const |
Returns the length of the vector, by the Pythagorean theorem. | |
double | length_squared () const |
Returns the square of the vector's length, cheap and easy. | |
bool | normalize () |
Normalizes the vector in place. | |
bool | operator!= (const LVecBase2d &other) const |
LVecBase2d | operator* (double scalar) const |
void | operator*= (double scalar) |
LVecBase2d | operator+ (const LVecBase2d &other) const |
void | operator+= (const LVecBase2d &other) |
LVecBase2d | operator- () const |
LVecBase2d | operator- (const LVecBase2d &other) const |
void | operator-= (const LVecBase2d &other) |
LVecBase2d | operator/ (double scalar) const |
void | operator/= (double scalar) |
bool | operator< (const LVecBase2d &other) const |
This performs a lexicographical comparison. | |
LVecBase2d & | operator= (double fill_value) |
LVecBase2d & | operator= (const LVecBase2d ©) |
bool | operator== (const LVecBase2d &other) const |
double & | operator[] (int i) |
double | operator[] (int i) const |
void | output (ostream &out) const |
LVecBase2d | project (const LVecBase2d &onto) const |
Returns a new vector representing the projection of this vector onto another one. | |
void | read_datagram (DatagramIterator &source) |
Function to read itself from a datagramIterator. | |
void | set (double x, double y) |
void | set_cell (int i, double value) |
void | set_x (double value) |
void | set_y (double value) |
void | write_datagram (Datagram &destination) const |
Function to write itself into a datagram. | |
Static Public Member Functions | |
static TypeHandle | get_class_type () |
static void | init_type () |
static int | size () |
Returns 2: the number of components of a LVecBase2. | |
static const LVecBase2d & | unit_x () |
Returns a unit X vector. | |
static const LVecBase2d & | unit_y () |
Returns a unit Y vector. | |
static const LVecBase2d & | zero () |
Returns a zero-length vector. | |
Public Attributes | |
union { | |
double data [2] | |
struct { | |
double _0 | |
double _1 | |
} v | |
} | _v |
This is the base class for all two-component vectors and points.
Definition at line 1090 of file lvecBase2.h.
size_t LVecBase2d::add_hash | ( | size_t | hash | ) | const [inline] |
Adds the vector into the running hash.
Definition at line 1767 of file lvecBase2.h.
size_t LVecBase2d::add_hash | ( | size_t | hash, |
double | threshold | ||
) | const [inline] |
Adds the vector into the running hash.
Definition at line 1778 of file lvecBase2.h.
bool LVecBase2d::almost_equal | ( | const LVecBase2d & | other, |
double | threshold | ||
) | const [inline] |
Returns true if two vectors are memberwise equal within a specified tolerance.
Definition at line 1917 of file lvecBase2.h.
Referenced by TextureReference::is_equivalent().
bool LVecBase2d::almost_equal | ( | const LVecBase2d & | other | ) | const [inline] |
Returns true if two vectors are memberwise equal within a default tolerance based on the numeric type.
Definition at line 1930 of file lvecBase2.h.
LVecBase2d::iterator LVecBase2d::begin | ( | ) | [inline] |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
Definition at line 1540 of file lvecBase2.h.
LVecBase2d::const_iterator LVecBase2d::begin | ( | ) | const [inline] |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
Definition at line 1562 of file lvecBase2.h.
int LVecBase2d::compare_to | ( | const LVecBase2d & | other | ) | const [inline] |
This flavor of compare_to uses a default threshold value based on the numeric type.
Definition at line 1713 of file lvecBase2.h.
int LVecBase2d::compare_to | ( | const LVecBase2d & | other, |
double | threshold | ||
) | const [inline] |
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).
Definition at line 1728 of file lvecBase2.h.
LVecBase2d::iterator LVecBase2d::end | ( | ) | [inline] |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
Definition at line 1551 of file lvecBase2.h.
LVecBase2d::const_iterator LVecBase2d::end | ( | ) | const [inline] |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
Definition at line 1573 of file lvecBase2.h.
void LVecBase2d::fill | ( | double | fill_value | ) | [inline] |
Sets each element of the vector to the indicated fill_value.
This is particularly useful for initializing to zero.
Definition at line 1585 of file lvecBase2.h.
void LVecBase2d::generate_hash | ( | ChecksumHashGenerator & | hashgen | ) | const [inline] |
Adds the vector to the indicated hash generator.
Definition at line 1966 of file lvecBase2.h.
void LVecBase2d::generate_hash | ( | ChecksumHashGenerator & | hashgen, |
double | threshold | ||
) | const [inline] |
Adds the vector to the indicated hash generator.
Definition at line 1976 of file lvecBase2.h.
const double * LVecBase2d::get_data | ( | ) | const [inline] |
Returns the address of the first of the two data elements in the vector.
The next element occupies the next position consecutively in memory.
Definition at line 1519 of file lvecBase2.h.
Referenced by XFileDataObject::set().
size_t LVecBase2d::get_hash | ( | ) | const [inline] |
Returns a suitable hash for phash_map.
Definition at line 1745 of file lvecBase2.h.
size_t LVecBase2d::get_hash | ( | double | threshold | ) | const [inline] |
Returns a suitable hash for phash_map.
Definition at line 1756 of file lvecBase2.h.
int LVecBase2d::get_num_components | ( | ) | const [inline] |
Returns the number of elements in the vector, two.
Definition at line 1529 of file lvecBase2.h.
bool LVecBase2d::is_nan | ( | ) | const [inline] |
Returns true if any component of the vector is not-a-number, false otherwise.
Definition at line 1413 of file lvecBase2.h.
double LVecBase2d::length | ( | ) | const [inline] |
Returns the length of the vector, by the Pythagorean theorem.
Definition at line 1610 of file lvecBase2.h.
double LVecBase2d::length_squared | ( | ) | const [inline] |
Returns the square of the vector's length, cheap and easy.
Definition at line 1621 of file lvecBase2.h.
bool LVecBase2d::normalize | ( | ) | [inline] |
Normalizes the vector in place.
Returns true if the vector was normalized, false if it was a zero-length vector.
Definition at line 1633 of file lvecBase2.h.
bool LVecBase2d::operator< | ( | const LVecBase2d & | other | ) | const [inline] |
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().
Definition at line 1679 of file lvecBase2.h.
LVecBase2d LVecBase2d::project | ( | const LVecBase2d & | onto | ) | const [inline] |
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 LPoint2d, and LVector2d.
Definition at line 1665 of file lvecBase2.h.
void LVecBase2d::read_datagram | ( | DatagramIterator & | source | ) | [inline] |
Function to read itself from a datagramIterator.
Definition at line 2003 of file lvecBase2.h.
int LVecBase2d::size | ( | ) | [inline, static] |
Returns 2: the number of components of a LVecBase2.
Definition at line 1402 of file lvecBase2.h.
const LVecBase2d & LVecBase2d::unit_x | ( | ) | [inline, static] |
Returns a unit X vector.
Reimplemented in LPoint2d, and LVector2d.
Definition at line 1338 of file lvecBase2.h.
const LVecBase2d & LVecBase2d::unit_y | ( | ) | [inline, static] |
Returns a unit Y vector.
Reimplemented in LPoint2d, and LVector2d.
Definition at line 1348 of file lvecBase2.h.
void LVecBase2d::write_datagram | ( | Datagram & | destination | ) | const [inline] |
Function to write itself into a datagram.
Definition at line 1987 of file lvecBase2.h.
const LVecBase2d & LVecBase2d::zero | ( | ) | [inline, static] |
Returns a zero-length vector.
Reimplemented in LPoint2d, and LVector2d.
Definition at line 1328 of file lvecBase2.h.