class LVecBase2d

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

Inheritance diagram

Inheritance diagram of LVecBase2d

LVecBase2d(void) = default
LVecBase2d(double fill_value)
LVecBase2d(double x, double y)
LVecBase2d(LVecBase2d const&) = default
std::size_t add_hash(std::size_t hash) const
std::size_t add_hash(std::size_t hash, double threshold) const

Adds the vector into the running hash.

void add_to_cell(int i, double value)

These next functions add to an existing value. i.e. foo.set_x(foo.get_x() + value) These are useful to reduce overhead in scripting languages:

void add_x(double value)
void add_y(double value)
bool almost_equal(LVecBase2d const &other, double threshold) const
bool almost_equal(LVecBase2d const &other) const

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

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

int compare_to(LVecBase2d const &other) const
int compare_to(LVecBase2d const &other, double threshold) const

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

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).

void componentwise_mult(LVecBase2d const &other)
double dot(LVecBase2d const &other) const
void fill(double fill_value)

Sets each element of the vector to the indicated fill_value. This is particularly useful for initializing to zero.

LVecBase2d fmax(LVecBase2d const &other) const
LVecBase2d fmin(LVecBase2d const &other) const
void generate_hash(ChecksumHashGenerator &hashgen) const
void generate_hash(ChecksumHashGenerator &hashgen, double threshold) const

Adds the vector to the indicated hash generator.

double get_cell(int i) const
static TypeHandle get_class_type(void)
double const *get_data(void) const

Returns the address of the first of the two data elements in the vector. The next element occupies the next position consecutively in memory.

std::size_t get_hash(void) const
std::size_t get_hash(double threshold) const

Returns a suitable hash for phash_map.

static constexpr int get_num_components(void)
double get_x(void) const
double get_y(void) const
bool is_nan(void) const

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

double length(void) const

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

double length_squared(void) const

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

bool normalize(void)

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

LVecBase2d normalized(void) const

Normalizes the vector and returns the normalized vector as a copy. If the vector was a zero-length vector, a zero length vector will be returned.

void output(std::ostream &out) const
LVecBase2d project(LVecBase2d const &onto) const

Returns a new vector representing the projection of this vector onto another one. The resulting vector will be a scalar multiple of onto.

void read_datagram(DatagramIterator &source)

Reads the vector from the Datagram using get_stdfloat().

void read_datagram_fixed(DatagramIterator &source)

Reads the vector from the Datagram using get_float32() or get_float64(). See write_datagram_fixed().

void set(double x, double y)
void set_cell(int i, double value)
void set_x(double value)
void set_y(double value)
static constexpr int size(void)
LVecBase2d const &unit_x(void)

Returns a unit X vector.

LVecBase2d const &unit_y(void)

Returns a unit Y vector.

bool validate_ptr(void const *ptr)
void write_datagram(Datagram &destination) const

Writes the vector to the Datagram using add_stdfloat(). This is appropriate when you want to write the vector using the standard width setting, especially when you are writing a bam file.

void write_datagram_fixed(Datagram &destination) const

Writes the vector to the Datagram using add_float32() or add_float64(), depending on the type of floats in the vector, regardless of the setting of Datagram::set_stdfloat_double(). This is appropriate when you want to write a fixed-width value to the datagram, especially when you are not writing a bam file.

LVecBase2d const &zero(void)

Returns a zero-length vector.