# Unigine::Math::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 svec4& v ) #

Constructor. Initializes the vector using a given svec4 source vector.

### Arguments

• const svec4& 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.

## dvec4 ( const __m128d& v0, const __m128d& v1 ) #

Constructor. Initializes the vector using two __m128d variables.
Notice
We do not recommend to use this method unless you have a clear understanding of SSE2.

### Arguments

• const __m128d& v0 - X and Y components of the vector in __m128d format.
• const __m128d& v1 - Z and W components of the vector in __m128d format.

## dvec4 ( const dvec2& v0, const dvec2& v1 ) #

Constructor. Initializes the vector using two dvec2 vectors.

### Arguments

• const dvec2& v0 - Two-component source vector for X and Y components.
• const dvec2& v1 - Two-component source vector for Z and W components.

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

Constructor. Initializes the vector using given constant 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.
• ConstexprTag - Auxiliary tag.

## dvec4 ( double v, ConstexprTag ) #

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

### Arguments

• double v - Constant scalar value.
• ConstexprTag - Auxiliary tag.

## dvec4 &abs ( ) #

Returns the absolute values of the vector components.

### Return value

Vector with absolute values.

## 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* v ) #

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

### Arguments

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

## voidset ( const dvec4& v ) #

Sets the vector equal to the specified source vector.

### Arguments

• const dvec4& v - Source vector.

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

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

### Arguments

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

## voidset ( double v ) #

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

### Arguments

• double v - Scalar value.

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

Sets the vector using a 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.

## voidget ( double* v ) const#

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

### Arguments

• double* v - 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 ( ) const#

Returns the length of the vector.

Vector length.

## doublelength2 ( ) const#

Returns the squared length of the vector.

### Return value

Squared length of the vector.

## dvec4 &normalize ( ) #

Returns normalized vector.

### Return value

Normalized vector.

## dvec4 &normalizeValid ( ) #

Normalizes a vector, makes its magnitude equal to 1. When normalized, a vector keeps the same direction but its length is equal to 1. Check for the zero vector is performed: if the argument is a zero vector, then a zero vector is returned.

### Return value

Normalized vector.

## dvec4 &normalize3 ( ) #

Returns the vector with normalized XYZ components.

### Return value

Vector with normalized XYZ components.

## dvec4 &normalizeValid3 ( ) #

Returns the vector with normalized XYZ components. Check for the zero vector is performed: if the argument is a zero vector, then a zero vector is returned.

### Return value

Vector with normalized XYZ components.

## const double *operator const double * ( ) const#

Performs type conversion to const double *.

## const void *operator const void * ( ) const#

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 v ) #

Performs scalar multiplication.

### Arguments

• double v - Scalar value.

### Return value

Resulting vector.

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

Performs vector multiplication.

### Arguments

• const dvec4& v - Vector.

### Return value

Resulting vector.

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

### Arguments

• const dvec4& v - Vector.

### Return value

Resulting vector.

## dvec4operator- ( ) const#

Performs vector negation.

### Return value

Resulting vector.

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

Performs vector subtraction.

### Arguments

• const dvec4& v - Vector.

### Return value

Resulting vector.

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

Performs componentwise division of vectors.

### Arguments

• const dvec4& v - 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 v ) #

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

### Arguments

• double v - 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& v ) #

Performs vector assignment. Destination vector = Source vector.

### Arguments

• const dvec4& v - 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.

## voidmul ( double v ) #

Multiplies the vector by the value of the specified argument.

### Arguments

• double v - A double multiplier.

## voidmul ( const dvec4& v ) #

Multiplies the vector by the value of the specified argument.

### Arguments

• const dvec4& v - Vector multiplier.

## voidmul3 ( double v ) #

Multiplies the X, Y, and Z components of the vector by the value of the specified argument.

### Arguments

• double v - A double multiplier.

## voiddiv ( double v ) #

Returns the result of division of the vector by the value of the specified arguments.

### Arguments

• double v - A double divisor value.

## voiddiv ( const dvec4& v ) #

Returns the result of division of the vector by the value of the specified arguments.

### Arguments

• const dvec4& v - A dvec4 divisor value.

## doublesum ( ) const#

Returns the sum of vector components.

## voidadd ( double v ) #

Performs addition of the specified value.

### Arguments

• double v - Value.

## voidadd ( const dvec4& v ) #

Performs addition of the specified value.

### Arguments

• const dvec4& v - Value.

## dvec4 &operator+= ( double v ) #

Performs addition of the specified value.

### Arguments

• double v - Value.

## voidsub ( double v ) #

Subtracts each element of the specified value from the corresponding vector's element.

### Arguments

• double v - Value.

## voidsub ( const dvec4& v ) #

Subtracts each element of the specified value from the corresponding vector's element.

### Arguments

• const dvec4& v - Value.

## dvec4 &operator-= ( double v ) #

Subtracts each element of the specified value from the corresponding vector's element.

### Arguments

• double v - Value.

## doubleiLength ( ) const#

Returns the inverted length of the vector.

## doublemaxXY ( ) const#

Returns the maximum of X and Y components.

## doublemaxXYZ ( ) const#

Returns the maximum of X, Y, and Z components.

## doublemax ( ) const#

Returns the maximum of X, Y, Z, and W components.

## unsigned inthash ( ) const#

Last update: 2022-04-20