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# Unigine::Unigine::dvec4 Struct

This class represents a vector of 4 double components.

## dvec4(const hvec4 & v)

Constructor. Initializes the vector using a given hvec4 source vector.

### Arguments

• const hvec4 & v - Source vector.

## dvec4()

Default constructor. Produces a zero vector.

## dvec4(const dvec4 & v)

Constructor. Initializes the vector by copying a given source vector.

### Arguments

• const dvec4 & v - Source vector.

## dvec4(const dvec2 & v, double z, double w)

Constructor. Initializes the vector using a given two-component dvec2 source vector and two scalars.

### Arguments

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

## dvec4(const dvec3 & v, double w)

Constructor. Initializes the vector using a given three-component dvec3 source vector and a scalar.

### Arguments

• const dvec3 & v - Three-component source vector.
• double w - W component of the vector.

## dvec4(double x, double y, double z, double w)

Constructor. Initializes the vector using given double values.

### 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.

### Examples

Source code (UnigineScript)
``````dvec4(1.0, 2.0, 3.0, 4.5);
/*
Creates a vector (1.0, 2.0, 3.0, 4.5)
*/``````

## explicit dvec4(double v)

Constructor. Initializes the vector using a given scalar value: x=v, y=v, z=v, w=v.

### Arguments

• double v - Scalar value.

## explicit dvec4(const dvec2 & v)

Constructor. Initializes the vector using a given two-component dvec2 source vector: x=v.x, y=v.y, z=0.0f, w=1.0f.

### Arguments

• const dvec2 & v - Two-component source vector.

## explicit dvec4(const dvec3 & v)

Constructor. Initializes the vector using a given three-component dvec3 source vector: x=v.x, y=v.y, z=v.z, w=1.0f.

### Arguments

• const dvec3 & v - Three-component source vector.

## explicit dvec4(const vec4 & v)

Constructor. Initializes the vector using a given vec4 source vector.

### Arguments

• const vec4 & v - Source vector.

## explicit dvec4(const ivec4 & v)

Constructor. Initializes the vector using a given ivec4 source vector.

### Arguments

• const ivec4 & v - Source vector.

## explicit dvec4(const bvec4 & v)

Constructor. Initializes the vector using a given bvec4 source vector.

### Arguments

• const bvec4 & v - Source vector.

## explicit dvec4(const double * v)

Constructor. Initializes the vector using a given pointer to the array of double elements: x=v[0], y=v[1], z=v[2], w=v[3].

### Arguments

• const double * v - Pointer to the array of double elements.

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

Sets the vector by components.

### 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.

## voidset(const double * val)

Sets the vector using the array of double elements: x=val[0], y=val[1], z=val[2], w=val[3].

### Arguments

• const double * val - Pointer to the array of double elements.

## voidset(const dvec4 & val)

Sets the vector equal to the specified source vector.

### Arguments

• const dvec4 & val - Source vector.

## voidset(const dvec3 & val, double w_)

Sets the vector using a three-component dvec3 source vector and a scalar.

### Arguments

• const dvec3 & val - Three-component source vector.
• double w_ - W component of the vector.

## voidset(double val)

Sets the vector components equal to specified scalar value: x=val, y=val, z=val, w=val.

### Arguments

• double val - Scalar value.

## voidset(const dvec2 & val, double z_, double w_)

Sets the vector using a two-component dvec2 source vector and two scalars.

### Arguments

• const dvec2 & val - Two-component source vector.
• double z_ - Z component of the vector.
• double w_ - W component of the vector.

## voidget(double * val) const

Gets the vector: val[0]=x, val[1]=y, val[2]=z, val[3]=w.

### Arguments

• double * val - Pointer to the array of double elements.

## double *get()

Returns the pointer to the vector.

### Return value

Pointer to the vector.

## const double *get() const

Returns the constant pointer to the vector.

### Return value

Pointer to the vector.

## doublelength()

Returns the length of the vector.

Vector length.

## doublelength2()

Returns the squared length of the vector.

### Return value

Squared length of the vector.

## dvec4 &normalize()

Returns normalized vector.

### Return value

Normalized vector.

## dvec4 &normalize3()

Returns the vector with normalized XYZ components.

### Return value

Vector with normalized XYZ components.

## const double *operator const double *()

Performs type conversion to const double *.

## const void *operator const void *()

Performs type conversion to const void *.

## double *operator double *()

Performs type conversion to double *.

## void *operator void *()

Performs type conversion to void *.

## dvec4 &operator*=(double val)

Performs scalar multiplication.

### Arguments

• double val - Scalar value.

### Return value

Resulting vector.

## dvec4 &operator*=(const dvec4 & val)

Performs vector multiplication.

### Arguments

• const dvec4 & val - Vector.

### Return value

Resulting vector.

## dvec4 &operator+=(const dvec4 & val)

### Arguments

• const dvec4 & val - Vector.

### Return value

Resulting vector.

## dvec4operator-() const

Performs vector negation.

### Return value

Resulting vector.

## dvec4 &operator-=(const dvec4 & val)

Performs vector subtraction.

### Arguments

• const dvec4 & val - Vector.

### Return value

Resulting vector.

## dvec4 &operator/=(const dvec4 & val)

Performs componentwise division of vectors.

### Arguments

• const dvec4 & val - Vector.

### Return value

Resulting vector.

### Examples

Source code (UnigineScript)
``````dvec4 a, b;
a = dvec4(6.0, 10.0, 12.0, 25.0);
b = dvec4(2.0, 5.0, 6.0, 5.0);
a /= b;
/*
Initial values of vectors a and b:
a (6.0, 10.0, 12.0, 25.0)
b (2.0, 5.0, 6.0, 5.0)

a /= b;
Vector a after operation:
a (3.0, 2.0, 2.0, 5.0)
*/``````

## dvec4 &operator/=(double val)

Performs componentwise division of the vector by the scalar. Implemented using the calculation of inverse scalar value with subsequent by-component multiplication.

### Arguments

• double val - Scalar value.

### Return value

Resulting vector.

### Examples

Source code (UnigineScript)
``````dvec4 a = dvec4(6.0, 10.0, 12.0, 25.0);
a /= 2.0;
/*
Initial value of vector a:
a (6.0, 10.0, 12.0, 25.0)

a /= 2.0;
Vector a after operation:
a (3.0, 5.0, 6.0, 12.5)
*/``````

## dvec4 &operator=(const dvec4 & val)

Performs vector assignment. Destination vector = Source vector.

### Arguments

• const dvec4 & val - Source vector.

Result.

## double &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.

## doubleoperator[](int i) const

Performs array access to the vector item by using given item index.

### Arguments

• int i - Vector item index.

Vector item.

## voidsse(const __m128d & v0, const __m128d & v1)

Sets the vector using two given 128-bit variables as a source.
Notice
We do not recommend to use this method unless you have a clear understanding of SSE2.

### Arguments

• const __m128d & v0 - 128-bit variable containing the first two double components (X, Y) of the vector.
• const __m128d & v1 - 128-bit variable containing the second two double components (Z, W) of the vector.

## __m128dsse0()

Returns the values of the first two double components (X, Y) of the vector as a 128-bit variable.
Notice
We do not recommend to use this method unless you have a clear understanding of SSE2.

### Return value

128-bit variable containing the first two double components (X, Y) of the vector.

## voidsse0(const __m128d & val)

Sets the values of the first two double components (X, Y) of the vector using a given 128-bit variable.
Notice
We do not recommend to use this method unless you have a clear understanding of SSE2.

### Arguments

• const __m128d & val - 128-bit variable containing the first two double components (X, Y) of the vector.

## voidsse1(const __m128d & val)

Sets the values of the second two double components (Z, W) of the vector using a given 128-bit variable.
Notice
We do not recommend to use this method unless you have a clear understanding of SSE2.

### Arguments

• const __m128d & val - 128-bit variable containing the second two double components (Z, W) of the vector.

## __m128dsse1()

Returns the values of the second two double components (Z, W) of the vector as a 128-bit variable.
Notice
We do not recommend to use this method unless you have a clear understanding of SSE2.

### Return value

128-bit variable containing the second two double components (Z, W) of the vector.

## dvec4 EPS

### Description

Vector, filled with epsilon constant (1e-6f).

## dvec4 INF

### Description

Vector, filled with infinity constant (1e+9f).

## dvec4 ONE

### Description

Vector, filled with ones (1).

## dvec4 ZERO

### Description

Vector, filled with zeros (0).
Last update: 2017-12-21