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 float * | const_iterator |
typedef const float * | iterator |
Public Member Functions | |
LVecBase2f (const LVecBase2f ©) | |
LVecBase2f (float fill_value) | |
LVecBase2f (float x, float y) | |
size_t | add_hash (size_t hash) const |
Adds the vector into the running hash. | |
size_t | add_hash (size_t hash, float threshold) const |
Adds the vector into the running hash. | |
void | add_to_cell (int i, float value) |
void | add_x (float value) |
void | add_y (float value) |
bool | almost_equal (const LVecBase2f &other, float threshold) const |
Returns true if two vectors are memberwise equal within a specified tolerance. | |
bool | almost_equal (const LVecBase2f &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 LVecBase2f &other) const |
This flavor of compare_to uses a default threshold value based on the numeric type. | |
int | compare_to (const LVecBase2f &other, float threshold) const |
Sorts vectors lexicographically, componentwise. | |
float | dot (const LVecBase2f &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 (float fill_value) |
Sets each element of the vector to the indicated fill_value. | |
LVecBase2f | fmax (const LVecBase2f &other) |
LVecBase2f | fmin (const LVecBase2f &other) |
void | generate_hash (ChecksumHashGenerator &hashgen) const |
Adds the vector to the indicated hash generator. | |
void | generate_hash (ChecksumHashGenerator &hashgen, float threshold) const |
Adds the vector to the indicated hash generator. | |
float | get_cell (int i) const |
const float * | 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 (float threshold) const |
Returns a suitable hash for phash_map. | |
int | get_num_components () const |
Returns the number of elements in the vector, two. | |
float | get_x () const |
float | get_y () const |
bool | is_nan () const |
Returns true if any component of the vector is not-a-number, false otherwise. | |
float | length () const |
Returns the length of the vector, by the Pythagorean theorem. | |
float | length_squared () const |
Returns the square of the vector's length, cheap and easy. | |
bool | normalize () |
Normalizes the vector in place. | |
bool | operator!= (const LVecBase2f &other) const |
LVecBase2f | operator* (float scalar) const |
void | operator*= (float scalar) |
LVecBase2f | operator+ (const LVecBase2f &other) const |
void | operator+= (const LVecBase2f &other) |
LVecBase2f | operator- () const |
LVecBase2f | operator- (const LVecBase2f &other) const |
void | operator-= (const LVecBase2f &other) |
LVecBase2f | operator/ (float scalar) const |
void | operator/= (float scalar) |
bool | operator< (const LVecBase2f &other) const |
This performs a lexicographical comparison. | |
LVecBase2f & | operator= (float fill_value) |
LVecBase2f & | operator= (const LVecBase2f ©) |
bool | operator== (const LVecBase2f &other) const |
float & | operator[] (int i) |
float | operator[] (int i) const |
void | output (ostream &out) const |
LVecBase2f | project (const LVecBase2f &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 (float x, float y) |
void | set_cell (int i, float value) |
void | set_x (float value) |
void | set_y (float 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 LVecBase2f & | unit_x () |
Returns a unit X vector. | |
static const LVecBase2f & | unit_y () |
Returns a unit Y vector. | |
static const LVecBase2f & | zero () |
Returns a zero-length vector. | |
Public Attributes | |
union { | |
float data [2] | |
struct { | |
float _0 | |
float _1 | |
} v | |
} | _v |
This is the base class for all two-component vectors and points.
Definition at line 99 of file lvecBase2.h.
size_t LVecBase2f::add_hash | ( | size_t | hash | ) | const [inline] |
Adds the vector into the running hash.
Definition at line 776 of file lvecBase2.h.
size_t LVecBase2f::add_hash | ( | size_t | hash, |
float | threshold | ||
) | const [inline] |
Adds the vector into the running hash.
Definition at line 787 of file lvecBase2.h.
bool LVecBase2f::almost_equal | ( | const LVecBase2f & | other, |
float | threshold | ||
) | const [inline] |
Returns true if two vectors are memberwise equal within a specified tolerance.
Definition at line 926 of file lvecBase2.h.
bool LVecBase2f::almost_equal | ( | const LVecBase2f & | other | ) | const [inline] |
Returns true if two vectors are memberwise equal within a default tolerance based on the numeric type.
Definition at line 939 of file lvecBase2.h.
LVecBase2f::iterator LVecBase2f::begin | ( | ) | [inline] |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
Definition at line 549 of file lvecBase2.h.
LVecBase2f::const_iterator LVecBase2f::begin | ( | ) | const [inline] |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
Definition at line 571 of file lvecBase2.h.
int LVecBase2f::compare_to | ( | const LVecBase2f & | other | ) | const [inline] |
This flavor of compare_to uses a default threshold value based on the numeric type.
Definition at line 722 of file lvecBase2.h.
int LVecBase2f::compare_to | ( | const LVecBase2f & | other, |
float | 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 737 of file lvecBase2.h.
LVecBase2f::iterator LVecBase2f::end | ( | ) | [inline] |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
Definition at line 560 of file lvecBase2.h.
LVecBase2f::const_iterator LVecBase2f::end | ( | ) | const [inline] |
Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
Definition at line 582 of file lvecBase2.h.
void LVecBase2f::fill | ( | float | 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 594 of file lvecBase2.h.
void LVecBase2f::generate_hash | ( | ChecksumHashGenerator & | hashgen | ) | const [inline] |
Adds the vector to the indicated hash generator.
Definition at line 975 of file lvecBase2.h.
void LVecBase2f::generate_hash | ( | ChecksumHashGenerator & | hashgen, |
float | threshold | ||
) | const [inline] |
Adds the vector to the indicated hash generator.
Definition at line 985 of file lvecBase2.h.
const float * LVecBase2f::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 528 of file lvecBase2.h.
size_t LVecBase2f::get_hash | ( | ) | const [inline] |
Returns a suitable hash for phash_map.
Definition at line 754 of file lvecBase2.h.
size_t LVecBase2f::get_hash | ( | float | threshold | ) | const [inline] |
Returns a suitable hash for phash_map.
Definition at line 765 of file lvecBase2.h.
int LVecBase2f::get_num_components | ( | ) | const [inline] |
Returns the number of elements in the vector, two.
Definition at line 538 of file lvecBase2.h.
bool LVecBase2f::is_nan | ( | ) | const [inline] |
Returns true if any component of the vector is not-a-number, false otherwise.
Definition at line 422 of file lvecBase2.h.
Referenced by CLerpNodePathInterval::set_end_tex_offset(), CLerpNodePathInterval::set_end_tex_scale(), Lens::set_film_size(), Lens::set_fov(), Lens::set_keystone(), CLerpNodePathInterval::set_start_tex_offset(), and CLerpNodePathInterval::set_start_tex_scale().
float LVecBase2f::length | ( | ) | const [inline] |
Returns the length of the vector, by the Pythagorean theorem.
Definition at line 619 of file lvecBase2.h.
Referenced by FisheyeLens::extrude_impl(), and CylindricalLens::project_impl().
float LVecBase2f::length_squared | ( | ) | const [inline] |
Returns the square of the vector's length, cheap and easy.
Definition at line 630 of file lvecBase2.h.
bool LVecBase2f::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 642 of file lvecBase2.h.
Referenced by PSphereLens::project_impl(), and FisheyeLens::project_impl().
bool LVecBase2f::operator< | ( | const LVecBase2f & | 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 688 of file lvecBase2.h.
LVecBase2f LVecBase2f::project | ( | const LVecBase2f & | 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 LPoint2f, and LVector2f.
Definition at line 674 of file lvecBase2.h.
void LVecBase2f::read_datagram | ( | DatagramIterator & | source | ) | [inline] |
Function to read itself from a datagramIterator.
Definition at line 1012 of file lvecBase2.h.
Referenced by Lens::fillin(), CollisionPolygon::fillin(), CollisionBox::fillin(), and MouseRecorder::play_frame().
int LVecBase2f::size | ( | ) | [inline, static] |
Returns 2: the number of components of a LVecBase2.
Definition at line 411 of file lvecBase2.h.
const LVecBase2f & LVecBase2f::unit_x | ( | ) | [inline, static] |
Returns a unit X vector.
Reimplemented in LPoint2f, and LVector2f.
Definition at line 347 of file lvecBase2.h.
const LVecBase2f & LVecBase2f::unit_y | ( | ) | [inline, static] |
Returns a unit Y vector.
Reimplemented in LPoint2f, and LVector2f.
Definition at line 357 of file lvecBase2.h.
void LVecBase2f::write_datagram | ( | Datagram & | destination | ) | const [inline] |
Function to write itself into a datagram.
Definition at line 996 of file lvecBase2.h.
Referenced by MouseRecorder::record_frame(), and Lens::write_datagram().
const LVecBase2f & LVecBase2f::zero | ( | ) | [inline, static] |
Returns a zero-length vector.
Reimplemented in LPoint2f, and LVector2f.
Definition at line 337 of file lvecBase2.h.
Referenced by GeomVertexReader::get_data2f(), TransformState::get_pos2d(), TransformState::get_scale2d(), and NodePath::get_tex_offset().