pangoMatrixTransformDistance {RGtk2} | R Documentation

## pangoMatrixTransformDistance

### Description

Transforms the distance vector (`dx`,`dy`) by `matrix`. This is similar to `pangoMatrixTransformPoint` except that the translation components of the transformation are ignored. The calculation of the returned vector is as follows:

### Usage

    pangoMatrixTransformDistance(object, dx, dy)

### Arguments

``object`` | [`PangoMatrix`] a `PangoMatrix`, or `NULL`
``dx`` | [numeric] in/out X component of a distance vector
``dy`` | [numeric] yn/out Y component of a distance vector

### Details

    dx2 = dx1 * xx + dy1 * xy;
    dy2 = dx1 * yx + dy1 * yy;

Affine transformations are position invariant, so the same vector always transforms to the same vector. If (`x1`,`y1`) transforms to (`x2`,`y2`) then (`x1`+`dx1`,`y1`+`dy1`) will transform to (`x1`+`dx2`,`y1`+`dy2`) for all values of `x1` and `x2`. Since 1.16

### Author(s)

Derived by RGtkGen from GTK+ documentation

[Package RGtk2 version 2.20.40 Index]