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# wxGraphicsMatrix (wx v2.5)

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A `wxGraphicsMatrix` is a native representation of an affine matrix.

The contents are specific and private to the respective renderer. Instances are ref counted and can therefore be assigned as usual. The only way to get a valid instance is via `wxGraphicsContext:createMatrix/2` or `wxGraphicsRenderer:createMatrix/2`.

This class is derived, and can use functions, from:

- `wxGraphicsObject`

wxWidgets docs: wxGraphicsMatrix

# Summary

## Types

wxGraphicsMatrix()

## Functions

concat(This, T)

Concatenates the matrix passed with the current matrix.

get(This)

Returns the component values of the matrix via the argument pointers.

invert(This)

Inverts the matrix.

isEqual(This, T)

Returns true if the elements of the transformation matrix are equal.

isIdentity(This)

Return true if this is the identity matrix.

rotate(This, Angle)

Rotates this matrix clockwise (in radians).

scale(This, XScale, YScale)

Scales this matrix.

set(This)

Equivalent to `set(This, [])`.

set/2

Sets the matrix to the respective values (default values are the identity matrix).

transformDistance(This)

Applies this matrix to a distance (ie.

transformPoint(This)

Applies this matrix to a point.

translate(This, Dx, Dy)

Translates this matrix.

# Types

# wxGraphicsMatrix()

    -type wxGraphicsMatrix() :: wx:wx_object().

# Functions

# concat(This, T)

    -spec concat(This, T) -> ok when This :: wxGraphicsMatrix(), T :: wxGraphicsMatrix().

Concatenates the matrix passed with the current matrix.

The effect of the resulting transformation is to first apply the transformation in `t` to the coordinates and then apply the transformation in the current matrix to the coordinates.

# get(This)

    -spec get(This) -> Result
                 when
                     Result ::
                         {A :: number(),
                          B :: number(),
                          C :: number(),
                          D :: number(),
                          Tx :: number(),
                          Ty :: number()},
                     This :: wxGraphicsMatrix().

Returns the component values of the matrix via the argument pointers.

# invert(This)

    -spec invert(This) -> ok when This :: wxGraphicsMatrix().

Inverts the matrix.

# isEqual(This, T)

    -spec isEqual(This, T) -> boolean() when This :: wxGraphicsMatrix(), T :: wxGraphicsMatrix().

Returns true if the elements of the transformation matrix are equal.

# isIdentity(This)

    -spec isIdentity(This) -> boolean() when This :: wxGraphicsMatrix().

Return true if this is the identity matrix.

# rotate(This, Angle)

    -spec rotate(This, Angle) -> ok when This :: wxGraphicsMatrix(), Angle :: number().

Rotates this matrix clockwise (in radians).

# scale(This, XScale, YScale)

    -spec scale(This, XScale, YScale) -> ok
                   when This :: wxGraphicsMatrix(), XScale :: number(), YScale :: number().

Scales this matrix.

# set(This)

    -spec set(This) -> ok when This :: wxGraphicsMatrix().

Equivalent to `set(This, [])`.

# set/2

    -spec set(This, [Option]) -> ok
                 when
                     This :: wxGraphicsMatrix(),
                     Option ::
                         {a, number()} |
                         {b, number()} |
                         {c, number()} |
                         {d, number()} |
                         {tx, number()} |
                         {ty, number()}.

Sets the matrix to the respective values (default values are the identity matrix).

# transformDistance(This)

    -spec transformDistance(This) -> {Dx :: number(), Dy :: number()} when This :: wxGraphicsMatrix().

Applies this matrix to a distance (ie.

performs all transforms except translations).

# transformPoint(This)

    -spec transformPoint(This) -> {X :: number(), Y :: number()} when This :: wxGraphicsMatrix().

Applies this matrix to a point.

# translate(This, Dx, Dy)

    -spec translate(This, Dx, Dy) -> ok when This :: wxGraphicsMatrix(), Dx :: number(), Dy :: number().

Translates this matrix.