hi::v1::matrix2 Class Reference

#include <hikogui/geometry/matrix2.hpp>

Public Member Functions
constexpr	matrix2 (matrix2 const &) noexcept=default
constexpr	matrix2 (matrix2 &&) noexcept=default
constexpr matrix2 &	operator= (matrix2 const &) noexcept=default
constexpr matrix2 &	operator= (matrix2 &&) noexcept=default
constexpr	matrix2 () noexcept
	Constructs an identity matrix.
constexpr	matrix2 (f32x4 col0, f32x4 col1, f32x4 col2, f32x4 col3=f32x4{0.0f, 0.0f, 0.0f, 1.0f}) noexcept
	Construct a matrix from four columns.
constexpr	matrix2 (vector3 col0, vector3 col1, vector3 col2, vector3 col3=vector3{}) noexcept
	Construct a matrix from four vectors.
constexpr	matrix2 (vector2 col0, vector2 col1) noexcept
	Construct a matrix from two vectors.
constexpr	matrix2 (float c0r0, float c1r0, float c2r0, float c0r1, float c1r1, float c2r1, float c0r2, float c1r2, float c2r2) noexcept
	Construct a 3x3 matrix from scalar values.
constexpr	matrix2 (float c0r0, float c1r0, float c2r0, float c3r0, float c0r1, float c1r1, float c2r1, float c3r1, float c0r2, float c1r2, float c2r2, float c3r2, float c0r3, float c1r3, float c2r3, float c3r3) noexcept
	Construct a 4x4 matrix from scalar values.
constexpr	matrix2 (translate2 const &rhs) noexcept
constexpr	matrix2 (scale2 const &rhs) noexcept
constexpr	matrix2 (rotate2 const &rhs) noexcept
	Convert quaternion to matrix.
constexpr	operator std::array< f32x4, 4 > () const noexcept
	Convert a point to its f32x4-nummeric_array.
constexpr bool	holds_invariant () const noexcept
constexpr f32x4	operator* (f32x4 const &rhs) const noexcept
	Transform a f32x4 numeric array by the matrix.
constexpr matrix2	operator~ () const
	Invert matrix.

Static Public Member Functions
static constexpr matrix2	uniform (aarectangle src_rectangle, aarectangle dst_rectangle, alignment alignment) noexcept
	Create a transformation matrix to translate and uniformly-scale a src_rectangle to a dst_rectangle.

Friends
template<int I>
constexpr f32x4 const &	get (matrix2 const &rhs) noexcept
	Get a column.
template<int I>
constexpr f32x4 &	get (matrix2 &rhs) noexcept
	Get a column.
constexpr matrix2	transpose (matrix2 const &rhs) noexcept
	Matrix transpose.
template<char DstX, char DstY, char DstZ, char DstW = 'w'>
constexpr matrix2	reflect (matrix2 const &rhs) noexcept
	Reflect axis of a matrix.
constexpr friend bool	operator== (matrix2 const &lhs, matrix2 const &rhs) noexcept
	Compare two matrices potentially of different dimensions.

Detailed Description

A 2D or 3D homogenius matrix for transforming homogenious vectors and points.

This matrix is in column major order. It is implemented as 4 columns made from a f32x4 numeric-array.

Constructor & Destructor Documentation

matrix2() [1/7]

constexpr hi::v1::matrix2::matrix2 ( )

inlineconstexprnoexcept

Constructs an identity matrix.

matrix2() [2/7]

constexpr hi::v1::matrix2::matrix2 ( f32x4 col0, f32x4 col1, f32x4 col2, f32x4 col3 = f32x4{0.0f, 0.0f, 0.0f, 1.0f} )

inlineconstexprnoexcept

Construct a matrix from four columns.

Parameters

col0	The 1st f32x4 column.
col1	The 2nd f32x4 column.
col2	The 3rd f32x4 column.
col3	The 4th f32x4 column.

matrix2() [3/7]

constexpr hi::v1::matrix2::matrix2 ( vector3 col0, vector3 col1, vector3 col2, vector3 col3 = vector3{} )

inlineconstexprnoexcept

Construct a matrix from four vectors.

Parameters

col0	The 1st vector3 column.
col1	The 2nd vector3 column.
col2	The 3rd vector3 column.
col3	The 4th vector3 column.

matrix2() [4/7]

constexpr hi::v1::matrix2::matrix2 ( vector2 col0, vector2 col1 )

inlineconstexprnoexcept

Construct a matrix from two vectors.

Parameters

col0	The 1st vector2 column.
col1	The 2nd vector2 column.

matrix2() [5/7]

constexpr hi::v1::matrix2::matrix2 ( float c0r0, float c1r0, float c2r0, float c0r1, float c1r1, float c2r1, float c0r2, float c1r2, float c2r2 )

inlineconstexprnoexcept

Construct a 3x3 matrix from scalar values.

The function parameters are in row-major order for pretty formatting in source code. The matrix itself remains in column-major order.

Parameters

c0r0	Value for column 0, row 0
c1r0	Value for column 1, row 0
c2r0	Value for column 2, row 0
c0r1	Value for column 0, row 1
c1r1	Value for column 1, row 1
c2r1	Value for column 2, row 1
c0r2	Value for column 0, row 2
c1r2	Value for column 1, row 2
c2r2	Value for column 2, row 2

matrix2() [6/7]

constexpr hi::v1::matrix2::matrix2 ( float c0r0, float c1r0, float c2r0, float c3r0, float c0r1, float c1r1, float c2r1, float c3r1, float c0r2, float c1r2, float c2r2, float c3r2, float c0r3, float c1r3, float c2r3, float c3r3 )

inlineconstexprnoexcept

Construct a 4x4 matrix from scalar values.

The function parameters are in row-major order for pretty formatting in source code. The matrix itself remains in column-major order.

Parameters

c0r0	Value for column 0, row 0
c1r0	Value for column 1, row 0
c2r0	Value for column 2, row 0
c3r0	Value for column 3, row 0
c0r1	Value for column 0, row 1
c1r1	Value for column 1, row 1
c2r1	Value for column 2, row 1
c3r1	Value for column 3, row 1
c0r2	Value for column 0, row 2
c1r2	Value for column 1, row 2
c2r2	Value for column 2, row 2
c3r2	Value for column 3, row 2
c0r3	Value for column 0, row 3
c1r3	Value for column 1, row 3
c2r3	Value for column 2, row 3
c3r3	Value for column 3, row 3

matrix2() [7/7]

constexpr hi::v1::matrix2::matrix2 ( rotate2 const & rhs )

inlineconstexprnoexcept

Convert quaternion to matrix.

Member Function Documentation

operator std::array< f32x4, 4 >()

constexpr hi::v1::matrix2::operator std::array< f32x4, 4 > ( ) const

inlineexplicitconstexprnoexcept

Convert a point to its f32x4-nummeric_array.

operator*()

constexpr f32x4 hi::v1::matrix2::operator* ( f32x4 const & rhs ) const

inlineconstexprnoexcept

Transform a f32x4 numeric array by the matrix.

Parameters

rhs	The f32x4 numeric array to transform.

Returns

The transformed numeric array.

operator~()

constexpr matrix2 hi::v1::matrix2::operator~ ( ) const

inlineconstexpr

Invert matrix.

uniform()

static constexpr matrix2 hi::v1::matrix2::uniform ( aarectangle src_rectangle, aarectangle dst_rectangle, alignment alignment )

inlinestaticconstexprnoexcept

Create a transformation matrix to translate and uniformly-scale a src_rectangle to a dst_rectangle.

The implementation is located in scale.hpp since the definition requires both scale and translate.

Parameters

src_rectangle	The rectangle to be transformed.
dst_rectangle	The rectangle after transformation.
alignment	How the src_rectangle should be aligned inside the dst_rectangle after scaling and moving.

Returns

A transformation matrix to move and scale the src_rectangle to the dst_rectangle.

Friends And Related Symbol Documentation

get [1/2]

template<int I>

constexpr f32x4 & get ( matrix2 & rhs )

friend

Get a column.

Template Parameters

I	The index of the column.

Returns

A reference to the selected column as a f32x4.

get [2/2]

template<int I>

constexpr f32x4 const & get ( matrix2 const & rhs )

friend

Get a column.

Template Parameters

I	The index of the column.

Returns

A const reference to the selected column as a f32x4.

operator==

constexpr friend bool operator== ( matrix2 const & lhs, matrix2 const & rhs )

friend

Compare two matrices potentially of different dimensions.

Parameters

rhs	The right-hand-side matrix.

Return values

true	When the two matrices compare equal.

reflect

template<char DstX, char DstY, char DstZ, char DstW = 'w'>

constexpr matrix2 reflect ( matrix2 const & rhs )

friend

Reflect axis of a matrix.

The default axis of HikoGUI's geometry system are:

       +y
       |   -z (away from camera)
       |  /
       | /
       |/
-x ----+---- +x
      /|
     / |
    /  |
  +z   |
       -y

In Vulkan the Y axis is downward; so to translate a matrix from HikoGUI to Vulkan you can use:

auto vulkan_M = reflect<'x', 'Y', 'z'>(hikogui_M);

The original axis are defined as the lower-case characters 'x', 'y', 'z' and 'w'; or for the negated axis as the upper-case characters 'X', 'Y', 'Z' and 'W'.

Template Parameters

DstX	Which of the original axis to use for the new matrix's x-axis.
DstY	Which of the original axis to use for the new matrix's y-axis.
DstZ	Which of the original axis to use for the new matrix's z-axis.
DstW	Which of the original axis to use for the new matrix's w-axis.

Parameters

rhs	The matrix to reflect

Returns

The reflected matrix.

transpose

constexpr matrix2 transpose ( matrix2 const & rhs )

friend

Matrix transpose.

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The documentation for this class was generated from the following file:

• hikogui/src/hikogui/geometry/matrix2.hpp