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Warning! This version of documentation is OUTDATED, as it describes an older SDK version! Please switch to the documentation for the latest SDK version.
Warning! This version of documentation describes an old SDK version which is no longer supported! Please upgrade to the latest SDK version.

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: 2022-02-04
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