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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: 2018-04-26
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