LVecBase2f¶
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class
LVecBase2f
¶ This is the base class for all two-component vectors and points.
Inheritance diagram
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LVecBase2f
(void) = default¶
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LVecBase2f
(float fill_value)¶
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LVecBase2f
(float x, float y)¶
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LVecBase2f
(LVecBase2f const&) = default¶
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std::size_t
add_hash
(std::size_t hash) const¶
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std::size_t
add_hash
(std::size_t hash, float threshold) const¶ Adds the vector into the running hash.
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void
add_to_cell
(int i, float 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:
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void
add_x
(float value)¶
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void
add_y
(float value)¶
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bool
almost_equal
(LVecBase2f const &other, float threshold) const¶
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bool
almost_equal
(LVecBase2f 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.
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int
compare_to
(LVecBase2f const &other) const¶
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int
compare_to
(LVecBase2f const &other, float 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).
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void
componentwise_mult
(LVecBase2f const &other)¶
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float
dot
(LVecBase2f const &other) const¶
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void
fill
(float fill_value)¶ Sets each element of the vector to the indicated fill_value. This is particularly useful for initializing to zero.
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LVecBase2f
fmax
(LVecBase2f const &other) const¶
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LVecBase2f
fmin
(LVecBase2f const &other) const¶
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void
generate_hash
(ChecksumHashGenerator &hashgen) const¶
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void
generate_hash
(ChecksumHashGenerator &hashgen, float threshold) const¶ Adds the vector to the indicated hash generator.
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float
get_cell
(int i) const¶
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static TypeHandle
get_class_type
(void)¶
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float 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.
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std::size_t
get_hash
(void) const¶
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std::size_t
get_hash
(float threshold) const¶ Returns a suitable hash for phash_map.
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static constexpr int
get_num_components
(void)¶
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float
get_x
(void) const¶
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float
get_y
(void) const¶
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bool
is_nan
(void) const¶ Returns true if any component of the vector is not-a-number, false otherwise.
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float
length
(void) const¶ Returns the length of the vector, by the Pythagorean theorem.
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float
length_squared
(void) const¶ Returns the square of the vector’s length, cheap and easy.
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bool
normalize
(void)¶ Normalizes the vector in place. Returns true if the vector was normalized, false if it was a zero-length vector.
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LVecBase2f
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.
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void
output
(std::ostream &out) const¶
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LVecBase2f
project
(LVecBase2f 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.
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void
read_datagram
(DatagramIterator &source)¶ Reads the vector from the Datagram using get_stdfloat().
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void
read_datagram_fixed
(DatagramIterator &source)¶ Reads the vector from the Datagram using get_float32() or get_float64(). See
write_datagram_fixed()
.
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void
set
(float x, float y)¶
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void
set_cell
(int i, float value)¶
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void
set_x
(float value)¶
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void
set_y
(float value)¶
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static constexpr int
size
(void)¶
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LVecBase2f const &
unit_x
(void)¶ Returns a unit X vector.
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LVecBase2f const &
unit_y
(void)¶ Returns a unit Y vector.
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bool
validate_ptr
(void const *ptr)¶
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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.
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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.
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LVecBase2f const &
zero
(void)¶ Returns a zero-length vector.
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