Unigine::vec2 Struct
| Header: | #include <UnigineMathLib.h> |
This class represents a vector of 2 float components.
vec2 Class
Members
vec2(const hvec2 & v)
Constructor. Initializes the vector using a given hvec2 source vector.Arguments
- const hvec2 & v - Source vector.
vec2()
Default constructor. Produces a zero vector.vec2(const vec2 & v)
Constructor. Initializes the vector by copying a given source vector.Arguments
- const vec2 & v - Source vector.
vec2(float x, float y)
Constructor. Initializes the vector using given float values.Arguments
- float x - X component of the vector.
- float y - Y component of the vector.
Examples
Source code (UnigineScript)
vec2(2.0, 3.0);
/*
Creates a vector (2.0, 3.0)
*/explicit vec2(float v)
Constructor. Initializes the vector using a given scalar value: x=v, y=v.Arguments
- float v - Scalar value.
Examples
Source code (UnigineScript)
vec2(1.0);
/*
Creates a vector (1.0, 1.0)
*/explicit vec2(const vec3 & v)
Constructor. Initializes the vector using a given three-component vec3 source vector: x=v.x, y=v.y.Arguments
- const vec3 & v - Three-component source vector.
explicit vec2(const vec4 & v)
Constructor. Initializes the vector using a given four-component vec4 source vector: x=v.x, y=v.y.Arguments
- const vec4 & v - Four-component source vector.
explicit vec2(const dvec2 & v)
Constructor. Initializes the vector using a given dvec2 source vector.Arguments
- const dvec2 & v - Source vector.
explicit vec2(const ivec2 & v)
Constructor. Initializes the vector using a given ivec2 source vector.Arguments
- const ivec2 & v - Source vector.
explicit vec2(const float * v)
Constructor. Initializes the vector using a given pointer to the array of float elements: x=v[0], y=v[1].Arguments
- const float * v - Pointer to the array of float elements.
void set(float x_, float y_)
Sets the vector by components.Arguments
- float x_ - X component of the vector.
- float y_ - Y component of the vector.
void set(const float * val)
Sets the vector using the array of float elements: x=val[0], y=val[1].Arguments
- const float * val - Pointer to the array of float elements.
void set(const vec2 & val)
Sets the vector equal to the specified source vector.Arguments
- const vec2 & val - Source vector.
void set(float val)
Sets the vector components equal to specified scalar value: x=val, y=val.Arguments
- float val - Scalar value.
void get(float * val) const
Gets the vector: val[0]=x, val[1]=y.Arguments
- float * val - Pointer to the array of float elements.
float * get()
Returns the pointer to the vector.Return value
Pointer to the vector.const float * get() const
Returns the constant pointer to the vector.Return value
Pointer to the vector.float length()
Returns the length of the vector.Return value
Vector length.float length2()
Returns the squared length of the vector.Return value
Squared length of the vector.vec2 & normalize()
Returns normalized vector.Return value
Normalized vector.vec2 & normalizeFast()
Returns normalized vector, calculated using the fast inverse square root algorithm.Return value
Normalized vector.const float * operator const float *()
Performs type conversion to const float *.const void * operator const void *()
Performs type conversion to const void *.float * operator float *()
Performs type conversion to float *.void * operator void *()
Performs type conversion to void *.vec2 & operator*=(float val)
Performs scalar multiplication.Arguments
- float val - Scalar value.
Return value
Resulting vector.vec2 & operator*=(const vec2 & val)
Performs vector multiplication.Arguments
- const vec2 & val - Vector.
Return value
Resulting vector.vec2 & operator+=(const vec2 & val)
Performs vector addition.Arguments
- const vec2 & val - Vector.
Return value
Resulting vector.vec2 operator-() const
Performs vector negation.Return value
Resulting vector.vec2 & operator-=(const vec2 & val)
Performs vector subtraction.Arguments
- const vec2 & val - Vector.
Return value
Resulting vector.vec2 & operator/=(const vec2 & val)
Performs componentwise division of vectors.Arguments
- const vec2 & val - Vector.
Return value
Resulting vector.Examples
Source code (UnigineScript)
vec2 a, b;
a = vec2(6.0, 10.0);
b = vec2(2.0, 5.0);
a /= b;
/*
Initial values of vectors a and b:
a (6.0, 10.0)
b (2.0, 5.0)
a /= b;
Vector a after operation:
a (3.0, 2.0)
*/vec2 & operator/=(float val)
Performs componentwise division of the vector by the scalar. Implemented using the calculation of inverse scalar value with subsequent by-component multiplication.Arguments
- float val - Scalar value.
Return value
Resulting vector.Examples
Source code (UnigineScript)
vec2 a = vec2(6.0, 10.0);
a /= 2.0;
/*
Initial value of vector a:
a (6.0, 10.0)
a /= 2.0;
Vector a after operation:
a (3.0, 5.0)
*/vec2 & operator=(const vec2 & val)
Performs vector assignment. Destination vector = Source vector.Arguments
- const vec2 & val - Source vector.
Return value
Result.float & operator[](int i)
Performs array access to the vector item reference by using given item index.Arguments
- int i - Vector item index.
Return value
Vector item reference.float operator[](int i) const
Performs array access to the vector item by using given item index.Arguments
- int i - Vector item index.
Return value
Vector item.vec2 EPS
Description
Vector, filled with epsilon constant (1e-6f).vec2 INF
Description
Vector, filled with infinity constant (1e+9f).vec2 ONE
Description
Vector, filled with ones (1).vec2 ZERO
Description
Vector, filled with zeros (0).Last update: 10.08.2018
Помогите сделать статью лучше
Была ли эта статья полезной?
(или выберите слово/фразу и нажмите Ctrl+Enter