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Unigine::Math::mat2 Struct

Header: #include <UnigineMathLibMat2.h>

This class represents a matrix of four (2x2) float components.

mat2 Class

Members


mat2 ( ) #

Default constructor. Produces an identity matrix.

mat2 ( const mat2& m ) #

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

Arguments

  • const mat2& m - Source matrix.

mat2 ( float v ) #

Constructor. Initializes the matrix using a given scalar value.
Source code (UnigineScript)
mat2(2.0);
						
/* Creates a matrix						
| 2.0	2.0	|
| 2.0	2.0	|
*/

Arguments

  • float v - Scalar value.

mat2 ( 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.

Arguments

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

mat2 ( const mat4& m ) #

Constructor. Initializes the matrix 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).

mat2 ( const dmat4& m ) #

Constructor. Initializes the matrix using a given dmat4 source matrix (3x4). The matrix elements are filled using corresponding elements of the source matrix.

Arguments

  • const dmat4& m - Source matrix (3x4).

mat2 ( const float* m ) #

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

Arguments

  • const float* m - Pointer to the source matrix.

mat2 ( const vec2& col0, const vec2& col1 ) #

Constructor. Initializes the matrix by given two vec2 vectors.
Output
Resulting matrix: 
    | col0.x   	 col1.x | 
M=  | col0.y     col1.y |

Arguments

  • const vec2& col0 - Source vector for the first column.
  • const vec2& col1 - Source vector for the second column.

mat2 ( float m00_, float m10_, float m01_, float m11_ ) #

Constructor. Initializes the matrix with given float values.
Output
Resulting matrix: 
    | m00_   m10_ | 
M=  | m01_   m11_ |

Arguments

  • float m00_ - m00_ element.
  • float m10_ - m10_ element.
  • float m01_ - m01_ element.
  • float m11_ - m11_ element.

mat2 ( float m00_, float m10_, float m01_, float m11_, ConstexprTag ) #

Constructor. Initializes the matrix with given constant float values.
Output
Resulting matrix: 
    | m00_   m10_ | 
M=  | m01_   m11_ |

Arguments

  • float m00_ - m00_ element.
  • float m10_ - m10_ element.
  • float m01_ - m01_ element.
  • float m11_ - m11_ element.
  • ConstexprTag - Auxiliary tag.

mat2 ( float v, ConstexprTag ) #

Constructor. Initializes the matrix with the given float value.
Output
Resulting matrix: 
    | v   v | 
M=  | v   v |

Arguments

  • float v - Value.
  • ConstexprTag - Auxiliary tag.

void set ( const float* m ) #

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

Arguments

  • const float* m - Pointer to the source matrix.

void set ( const mat2& m ) #

Sets the matrix equal to the specified source matrix.

Arguments

  • const mat2& m - Source matrix.

void set ( const mat3& m ) #

Sets the matrix using a given mat3 source matrix (3x3). Values m00, m01, m10, m11 from the source matrix are used.

Arguments

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

void set ( const mat4& m ) #

Sets the matrix using a given mat4 source matrix (4x4). Values m00, m01, m10, m11 from the source matrix are used.

Arguments

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

void set ( const dmat4& m ) #

Sets the matrix using a given dmat4 source matrix (3x4). Values m00, m01, m10, m11 from the source matrix are used.

Arguments

  • const dmat4& m - Source matrix (3x4).

void set ( int row, int column, float v ) #

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

Arguments

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

float * get ( ) #

Returns the pointer to the matrix.

Return value

Pointer to the matrix.

const float * get ( ) const#

Returns the constant pointer to the matrix.

Return value

Constant pointer to the matrix.

void get ( float* m ) const#

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

Arguments

  • float* m - Destination matrix pointer.

float & 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.

float get ( 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.

void setColumn ( int column, const vec2& v ) #

Sets the specified column of the matrix using a given vec2 vector as a source.

Arguments

  • int column - Column.
  • const vec2& v - Source vector.

vec2 getColumn ( int column ) const#

Returns the specified matrix column.

Arguments

  • int column - Column.

Return value

The vec2 vector with column values.

void setIdentity ( ) #

Sets the matrix equal to the identity matrix.

void setRotate ( float angle ) #

Fills the rotation matrix using a given angle.
Output
Rotation matrix: 
    | cos(angle)   	-sin(angle) | 
R=  | sin(angle)     cos(angle) |

Arguments

  • float angle - Rotation angle, in degrees.

void setRow ( int row, const vec2& v ) #

Sets the specified row of the matrix using a given vec2 vector as a source.

Arguments

  • int row - Row.
  • const vec2& v - Source vector.

vec2 getRow ( int row ) const#

Returns the specified matrix row.

Arguments

  • int row - Row.

Return value

The vec2 vector with row values.

void setScale ( const vec2& v ) #

Fills the scaling matrix using a given vec2 source vector.
Output
Scaling matrix: 
    | v.x   	0.0f | 
S=  | 0.0f      v.y  |

Arguments

  • const vec2& v - Source vector.

void setZero ( ) #

Sets all matrix elements equal to 0.

const float * operator const float * ( ) const#

Performs type conversion to const float *.

const void * operator const void * ( ) const#

Performs type conversion to const void *.

float * operator float * ( ) #

Performs type conversion to float *.

void * operator void * ( ) #

Performs type conversion to void *.

mat2 & operator*= ( const mat2& m ) #

Performs matrix multiplication.

Arguments

  • const mat2& m - Matrix.

Return value

Resulting matrix.

mat2 & operator*= ( float v ) #

Performs scalar multiplication.

Arguments

  • float v - Scalar value.

Return value

Resulting matrix.

mat2 & operator+= ( const mat2& m ) #

Performs matrix addition.

Arguments

  • const mat2& m - Matrix.

Return value

Resulting matrix.

mat2 operator- ( ) const#

Performs matrix negation.

Return value

Resulting matrix.

mat2 & operator-= ( const mat2& m ) #

Performs matrix subtraction.

Arguments

  • const mat2& m - Matrix.

Return value

Resulting matrix.

mat2 & operator= ( const mat2& m ) #

Performs matrix assignment. Destination matrix = Source matrix.

Arguments

  • const mat2& m - Source matrix.

Return value

Result.

float operator[] ( int i ) const#

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

Arguments

  • int i - Matrix item index.

Return value

Matrix item.

float & operator[] ( int i ) #

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

Arguments

  • int i - Matrix item index.

Return value

Matrix item reference.

float trace ( ) const#

Returns the trace of the matrix.

Return value

Trace of the matrix.

float determinant ( ) const#

Returns the determinant of the matrix.

Return value

Determinant of the matrix.
Last update: 24.08.2021
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