Gegl.Matrix3¶

Fields¶

Name	Type	Access	Description
coeff	[`float`]	r/w

Methods¶

class	`new` ()
	`copy` ()
	`copy_into` (src)
	`determinant` ()
	`equal` (matrix2)
	`identity` ()
	`invert` ()
	`is_affine` ()
	`is_identity` ()
	`is_scale` ()
	`is_translate` ()
	`multiply` (right, product)
	`originate` (x, y)
	`parse_string` (string)
	`round_error` ()
	`to_string` ()
	`transform_point` (x, y)

Details¶

class Gegl.Matrix3¶

classmethod new()¶

Returns:: A newly allocated Gegl.Matrix3
Return type:: Gegl.Matrix3

copy()¶

Return type:: Gegl.Matrix3

Returns a copy of src.

copy_into(src)¶

Parameters:: src (Gegl.Matrix3) – a Gegl.Matrix3

Copies the matrix in src into self.

determinant()¶

Return type:: float

Returns the determinant for the matrix.

equal(matrix2)¶

Parameters:: matrix2 (Gegl.Matrix3) – a Gegl.Matrix3
Return type:: bool

Check if two matrices are equal.

Returns True if the matrices are equal.

identity()¶: Set the provided self to the identity matrix.

invert()¶: Inverts self.

is_affine()¶

Return type:: bool

Check if a matrix only does an affine transformation.

Returns True if the matrix only does an affine transformation.

is_identity()¶

Return type:: bool

Check if a matrix is the identity matrix.

Returns True if the matrix is the identity matrix.

is_scale()¶

Return type:: bool

Check if a matrix only does scaling.

Returns True if the matrix only does scaling.

is_translate()¶

Return type:: bool

Check if a matrix only does translation.

Returns True if the matrix only does trasnlation.

multiply(right, product)¶

Parameters:

right (Gegl.Matrix3) – a Gegl.Matrix3
product (Gegl.Matrix3) – a Gegl.Matrix3 to store the result in.

Multiples product = self · right

originate(x, y)¶

Parameters:

x (float) – x coordinate of new origin
y (float) – y coordinate of new origin.

Shift the origin of the transformation specified by self to (x, y). In other words, calculate the matrix that:

Translates the input by (-x, -y).

Transforms the result using the original self.

Translates the result by (x, y).

parse_string(string)¶

Parameters:: string (str) – a string describing the matrix (right now a small subset of the transform strings allowed by SVG)

Parse a transofmation matrix from a string.

round_error()¶: Rounds numerical errors in self to the nearest integer.

to_string()¶

Return type:: str

Serialize a Gegl.Matrix3 to a string.

Returns a freshly allocated string representing that Gegl.Matrix3, the returned string should be GLib.free()’d.

transform_point(x, y)¶

Parameters:

x (float) – pointer to an x coordinate
y (float) – pointer to an y coordinate

transforms the coordinates provided in x and y and changes to the coordinates gotten when the transformed with the matrix.