# Unigine::Math::dmat4 Struct

This class represents a matrix of twelve (3x4) double components.

## dmat4 ( const dvec3 & col0, const dvec3 & col1, const dvec3 & col2, const dvec3 & col3 ) #

Constructor. Initializes the matrix using given three dvec3 vectors.
Output
``````Resulting matrix:
| col0.x  	 col1.x	  	col2.x	   col3.x |
M=  | col0.y   	 col1.y	  	col2.y     col3.y |
| col0.z   	 col1.z	  	col2.z     col3.z |``````

### Arguments

• const dvec3 & col0 - Source vector for the first column.
• const dvec3 & col1 - Source vector for the second column.
• const dvec3 & col2 - Source vector for the third column.
• const dvec3 & col3 - Source vector for the fourth column.

## dmat4 ( const quat & q, const dvec3 & v ) #

Constructor. Initializes the matrix using a given quaternion and a dvec3 vector.

### Arguments

• const quat & q - Source quaternion.
• const dvec3 & v - Source vector.

## dmat4 ( const mat3 & m, const dvec3 & v ) #

Constructor. Initializes the matrix using a given source mat3 matrix (3x3) and a dvec3 vector.

### Arguments

• const mat3 & m - Source matrix (3x3).
• const dvec3 & v - Source vector.

## dmat4 ( const float * m, int transpose ) #

Constructor. Initializes the matrix using a given pointer to the source matrix.

### Arguments

• const float * m - Pointer to the source matrix.
• int transpose - If transpose is 0 (by default), the matrix is specified in the column major style.

## dmat4 ( const double * m, int transpose ) #

Constructor. Initializes the matrix using a given pointer to the source matrix.

### Arguments

• const double * m - Pointer to the source matrix.
• int transpose - If transpose is 0 (by default), the matrix is specified in the column major style.

## dmat4 ( const mat3 & m ) #

Constructor. Initializes the matrix using a given mat3 source matrix (3x3). The matrix elements are filled using corresponding elements of the source matrix.
Output
``````Resulting matrix:
| m00  	 m01  	 m02	  0.0f |
M=  | m10    m11  	 m12      0.0f |
| m20    m21     m22      0.0f |``````

### Arguments

• const mat3 & m - Source matrix (3x3).

## dmat4 ( const mat2 & m ) #

Constructor. Initializes the matrix using a given mat2 source matrix (2x2). The matrix elements are filled using corresponding elements of the source matrix.
Output
``````Resulting matrix:
| m00  	 m01  	 0.0f	  0.0f |
M=  | m10    m11  	 0.0f     0.0f |
| 0.0f   0.0f    1.0f     0.0f |``````

### Arguments

• const mat2 & m - Source matrix (2x2).

## dmat4 ( double v ) #

Constructor. Initializes the matrix using a given scalar value.
Source code (UnigineScript)
``````dmat4(2.0);

/* Creates a matrix
| 2.0 	2.0 	2.0		2.0	|
| 2.0 	2.0 	2.0		2.0	|
| 2.0 	2.0 	2.0		2.0	|
*/``````

### Arguments

• double v - Scalar value.

## dmat4 ( const dmat4 & m ) #

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

### Arguments

• const dmat4 & m - Source matrix.

## dmat4 ( ) #

Default constructor. Produces an identity matrix.

## explicit dmat4 ( const mat4 & m ) #

Constructor. Initializes the matrix using a given source mat4 matrix (4x4). The matrix elements are filled using corresponding elements of the source matrix.

### Arguments

• const mat4 & m - Source matrix (4x4).

## explicit dmat4 ( const quat & q ) #

Constructor. Initializes the matrix using a given source quaternion.

### Arguments

• const quat & q - Source quaternion.

## voidset ( int row, int column, double v ) #

Sets a new value of the matrix element specified by row and column.

### Arguments

• int row - Row.
• int column - Column.
• double v - The value to be set.

## voidset ( const float * v, int transpose ) #

Sets new matrix values using a pointer to the source matrix.

### Arguments

• const float * v - Pointer to the source matrix.
• int transpose - If transpose is 0 (by default), the matrix is specified in the column major style.

## voidset ( const mat2 & m ) #

Sets new matrix values using a given mat2 source matrix (2x2). The matrix elements are filled using corresponding elements of the source matrix.

### Arguments

• const mat2 & m - Source matrix (2x2).

## voidset ( const mat3 & m ) #

Sets new matrix values using a given mat3 source matrix (3x3). The matrix elements are filled using corresponding elements of the source matrix.

### Arguments

• const mat3 & m - Source matrix (3x3).

## voidset ( const quat & q, const dvec3 & v ) #

Sets new matrix values using a given quaternion and a dvec3 vector.

### Arguments

• const quat & q - Source quaternion.
• const dvec3 & v - Source vector.

## voidset ( const quat & q ) #

Sets new matrix values using a given source quaternion.

### Arguments

• const quat & q - Source quaternion.

## voidset ( const mat4 & m ) #

Sets new matrix values using a given mat4 source matrix (4x4). The matrix elements are filled using corresponding elements of the source matrix.

### Arguments

• const mat4 & m - Source matrix (4x4).

## voidset ( const double * v, int transpose ) #

Sets new matrix values using a pointer to the source matrix.

### Arguments

• const double * v - Pointer to the source matrix.
• int transpose - If transpose is 0 (by default), the matrix is specified in the column major style.

## voidset ( const dmat4 & m ) #

Sets the matrix equal to the specified source matrix.

### Arguments

• const dmat4 & m - Source matrix.

## voidset ( const mat3 & m, const dvec3 & v ) #

Sets new matrix values using a given source mat3 matrix (3x3) and a dvec3 vector.

### Arguments

• const mat3 & m - Source matrix (3x3).
• const dvec3 & v - Source vector.

## double &get ( int row, int column ) #

Returns the reference to the matrix element specified by given row and column.

### Arguments

• int row - Row.
• int column - Column.

### Return value

Matrix element reference.

## doubleget ( int row, int column ) # const

Returns the value of the matrix element specified by given row and column.

### Arguments

• int row - Row.
• int column - Column.

### Return value

Matrix element value.

## double *get ( ) #

Returns the pointer to the matrix.

### Return value

Pointer to the matrix.

## const double *get ( ) # const

Returns the constant pointer to the matrix.

### Return value

Constant pointer to the matrix.

## voidget ( double * m, int transpose ) #

Fills the destination matrix, specified by the given pointer, with matrix values.

### Arguments

• double * m - Destination matrix pointer.
• int transpose - If transpose is 0 (by default), the matrix is specified in the column major style.

## voidsetColumn ( int column, const dvec4 & v ) #

Sets the specified column of the matrix using a given dvec4 vector as a source.

### Arguments

• int column - Column.
• const dvec4 & v - Source vector.

## dvec4getColumn ( int column ) # const

Returns the specified matrix column.

### Arguments

• int column - Column.

### Return value

The dvec4 vector with column values.

## voidsetColumn3 ( int column, const dvec3 & v ) #

Sets the specified column of the matrix using a given three-component dvec3 vector as a source.

### Arguments

• int column - Column.
• const dvec3 & v - Three-component source vector.

## dvec3getColumn3 ( int column ) # const

Returns the specified matrix column.

### Arguments

• int column - Column.

### Return value

The dvec3 vector with column values.

## voidsetIdentity ( ) #

Sets the matrix equal to the identity matrix.

## voidsetRotate ( const dvec3 & axis, double angle ) #

Sets the rotation matrix for a given axis.

### Arguments

• const dvec3 & axis - Rotation axis.
• double angle - Rotation angle, in degrees.

## quatgetRotate ( ) # const

Returns the quaternion, representing the rotation part of the matrix.

### Return value

Matrix rotation part.

## voidsetRotateX ( double angle ) #

Sets X rotation matrix.

### Arguments

• double angle - Rotation angle, in degrees.

## voidsetRotateY ( double angle ) #

Sets Y rotation matrix.

### Arguments

• double angle - Rotation angle, in degrees.

## voidsetRotateZ ( double angle ) #

Sets Z rotation matrix.

### Arguments

• double angle - Rotation angle, in degrees.

## voidsetRow ( int row, const dvec4 & v ) #

Sets the specified row of the matrix using a given dvec4 vector as a source.

### Arguments

• int row - Row.
• const dvec4 & v - Source vector.

## dvec4getRow ( int row ) # const

Returns the specified matrix row.

### Arguments

• int row - Row.

### Return value

The dvec4 vector with row values.

## voidsetRow3 ( int row, const dvec3 & v ) #

Sets the specified row of the matrix using a given three-component dvec3 vector as a source, the last element of the row remains as is.

### Arguments

• int row - Row.
• const dvec3 & v - Three-component source vector.

## dvec3getRow3 ( int row ) # const

Returns the first three elements of the specified matrix row.

### Arguments

• int row - Row.

### Return value

The dvec3 vector with the first three elements of the specified matrix row.

## voidsetScale ( const dvec3 & v ) #

Fills the scaling matrix using a given dvec3 source vector.
Output
``````Scaling matrix:
| v.x   	0.0f  	  0.0f	    0.0f |
S=  | 0.0f      v.y  	  0.0f      0.0f |
| 0.0f      0.0f      v.z  		0.0f |``````

### Arguments

• const dvec3 & v - Source vector.

## vec3getScale ( ) # const

Returns the three-component vec3 vector, representing the scaling part of the matrix.

### Return value

Three-component vector with the scaling part of the matrix.

## voidsetTranslate ( const dvec3 & v ) #

Fills the translation matrix using a given dvec3 source vector.
Output
``````Translation matrix:
| 1.0f   	0.0f  	  0.0f	    v.x |
T=  | 0.0f      1.0f  	  0.0f      v.y |
| 0.0f      0.0f      1.0f  	v.z |``````

### Arguments

• const dvec3 & v - Source vector.

## dvec3getTranslate ( ) # const

Returns the three-component vec3 vector, representing the translation part of the matrix.

### Return value

Three-component vector with the translation part of the matrix.

## voidsetZero ( ) #

Sets all matrix elements equal to 0.

## 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 *.

## dmat4 &operator*= ( const dmat4 & m ) #

Performs matrix multiplication.

### Arguments

• const dmat4 & m - Matrix.

### Return value

Resulting matrix.

## dmat4 &operator*= ( double v ) #

Performs scalar multiplication.

### Arguments

• double v - Scalar value.

### Return value

Resulting matrix.

## dmat4 &operator+= ( const dmat4 & m ) #

### Arguments

• const dmat4 & m - Matrix.

### Return value

Resulting matrix.

## dmat4operator- ( ) #

Performs matrix negation.

### Return value

Resulting matrix.

## dmat4 &operator-= ( const dmat4 & m ) #

Performs matrix subtraction.

### Arguments

• const dmat4 & m - Matrix.

### Return value

Resulting matrix.

## dmat4 &operator= ( const dmat4 & m ) #

Performs matrix assignment. Destination matrix = Source matrix.

### Arguments

• const dmat4 & m - Source matrix.

Result.

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

Performs array access to the matrix item reference using given item index.

### Arguments

• int i - Matrix item index.

### Return value

Matrix item reference.

## doubleoperator[] ( int i ) # const

### Arguments

• int i - Matrix item index.

Matrix item.

## __m128dsse0 ( ) #

Returns the values of matrix elements m00, m10 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 following matrix elements: m00, m10.

## voidsse0 ( const __m128d & v ) #

Sets the values of matrix elements m00, m10 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 & v - 128-bit variable containing the following matrix elements: m00, m10.

## voidsse1 ( const __m128d & v ) #

Sets the values of matrix elements m20, m01 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 & v - 128-bit variable containing the following matrix elements: m20, m01.

## __m128dsse1 ( ) #

Returns the values of matrix elements m20, m01 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 following matrix elements: m20, m01.

## voidsse2 ( const __m128d & v ) #

Sets the values of matrix elements m11, m21 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 & v - 128-bit variable containing the following matrix elements: m11, m21.

## __m128dsse2 ( ) #

Returns the values of matrix elements m11, m21 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 following matrix elements: m11, m21.

## voidsse3 ( const __m128d & v ) #

Sets the values of matrix elements m02, m12 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 & v - 128-bit variable containing the following matrix elements: m02, m12.

## __m128dsse3 ( ) #

Returns the values of matrix elements m02, m12 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 following matrix elements: m02, m12.

## voidsse4 ( const __m128d & v ) #

Sets the values of matrix elements m22, m03 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 & v - 128-bit variable containing the following matrix elements: m22, m03.

## __m128dsse4 ( ) #

Returns the values of matrix elements m22, m03 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 following matrix elements: m22, m03.

## __m128dsse5 ( ) #

Returns the values of matrix elements m13, m23 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 following matrix elements: m13, m23.

## voidsse5 ( const __m128d & v ) #

Sets the values of matrix elements m13, m23 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 & v - 128-bit variable containing the following matrix elements: m13, m23.

## dvec3getAxisX ( ) #

Returns the normalized vector representing the X axis. Call this method to get the right or left vector of the matrix:
Source code (C++)
``````matrix.getAxisX(); // the left vector
-matrix.getAxisX(); // the right vector``````

### Return value

Vector representing the X axis.

## dvec3getAxisY ( ) #

Returns the normalized vector representing the Y axis. Call this method to get the back or forward vector of the matrix:
Source code (C++)
``````matrix.getAxisY(); // the back vector
-matrix.getAxisY(); // the forward vector``````

### Return value

Vector representing the Y axis.

## dvec3getAxisZ ( ) #

Returns the normalized vector representing the Z axis. Call this method to get the up or down vector of the matrix:
Source code (C++)
``````matrix.getAxisZ(); // the up vector
-matrix.getAxisZ(); // the down vector``````

### Return value

Vector representing the Z axis.
Last update: 2020-05-19