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# dvec4 Struct (C++)

Vector of 4 double components.

To use this structure, include the UnigineMathLib.h file.

## UNIGINE_DECLARE_USE_MEMORY UNIGINE_INLINEdvec4 ()

Default constructor that produces a zero vector.

## UNIGINE_INLINEdvec4 (const dvec4 & v)

Initialization by a vector.

### Arguments

• const dvec4 & v - The value of the vector.

## UNIGINE_INLINEdvec4 (const dvec2 & v, double z, double w)

Initialization by a vector and two scalars.

### Arguments

• const dvec2 & v - The value of the vector.
• double z - Z component of the vector.
• double w - W component of the vector.

## UNIGINE_INLINEdvec4 (const dvec3 & v, double w)

Initialization by a vector and a scalar.

### Arguments

• const dvec3 & v - The value of the vector.
• double w - W component of the vector.

## UNIGINE_INLINEdvec4 (double x, double y, double z, double w)

Initialization by scalars.

### Arguments

• double x - X component of the vector.
• double y - Y component of the vector.
• double z - Z component of the vector.
• double w - W component of the vector.

## explicit UNIGINE_INLINEdvec4 (double v)

Initialization by a scalar.

### Arguments

• double v - The value of the scalar.

## explicit UNIGINE_INLINEdvec4 (const dvec2 & v)

Initialization by a two component vector: x=v.x, y=v.y, z=0.0f, w=1.0.

### Arguments

• const dvec2 & v - The value of the vector.

## explicit UNIGINE_INLINEdvec4 (const dvec3 & v)

Initialization by a three component vector: x=v.x, y=v.y, z=v.z, w=1.0.

### Arguments

• const dvec3 & v - The value of the vector.

## explicit UNIGINE_INLINEdvec4 (const vec4 & v)

Initialization by a vector.

### Arguments

• const vec4 & v - The value of the vector.

## explicit UNIGINE_INLINEdvec4 (const ivec4 & v)

Initialization by a vector of integer components.

### Arguments

• const ivec4 & v - The value of the vector.

## explicit UNIGINE_INLINEdvec4 (const bvec4 & v)

Initialization by a vector of byte components.

### Arguments

• const bvec4 & v - The value of the vector.

## explicit UNIGINE_INLINEdvec4 (const double * v)

Initialization by a pointer to the vector.

### Arguments

• const double * v - Pointer to the vector.

## UNIGINE_INLINE dvec4operator- () const

Vector negation.

### Return value

The resulting vector.

## UNIGINE_INLINE dvec4 &operator*= (double v)

Scalar multiplication.

### Arguments

• double v - The value of the scalar.

### Return value

The resulting vector.

## UNIGINE_INLINE dvec4 &operator*= (const dvec4 & v)

Vector multiplication.

### Arguments

• const dvec4 & v - The value of the vector.

### Return value

The resulting vector.

## UNIGINE_INLINE dvec4 &operator+= (const dvec4 & v)

### Arguments

• const dvec4 & v - The value of the vector.

### Return value

The resulting vector.

## UNIGINE_INLINE dvec4 &operator-= (const dvec4 & v)

Vector subtraction.

### Arguments

• const dvec4 & v - The value of the vector.

### Return value

The resulting vector.

## UNIGINE_INLINE double &operator[] (int i)

Array access.

### Arguments

• int i - Array item index.

The array item.

## UNIGINE_INLINE doubleoperator[] (int i) const

Constant array access.

### Arguments

• int i - Array item index.

The array item.

## UNIGINE_INLINE voidset (double x_, double y_, double z_, double w_)

Set vector.

### Arguments

• double x_ - X component of the vector.
• double y_ - Y component of the vector.
• double z_ - Z component of the vector.
• double w_ - W component of the vector.

## UNIGINE_INLINE voidset (const double * v)

Set vector.

### Arguments

• const double * v - Pointer to the vector.

## UNIGINE_INLINE voidget (double * v) const

Get vector.

### Arguments

• double * v - Pointer to the vector.

## UNIGINE_INLINE double *get ()

Get a pointer to the vector.

### Return value

Pointer to the vector.

## UNIGINE_INLINE const double *get () const

Get a constant pointer to the vector.

### Return value

Pointer to the vector.

## Unigine::dvec4::Union

union {
struct {
double x;
double y;
double z;
double w;
};
double v[4];
};
Last update: 2017-07-03