cairoMatrixTransformDistance

Transforms the distance vector (<code>dx</code>,<code>dy</code>) by <code>matrix</code>. This is
similar to <code>cairo<matrix><transform>()</transform> except that the translation
components of the transformation are ignored. The calculation of
the returned vector is as follows:</matrix>
<usage>cairoMatrixTransformDistance(matrix, dx, dy)</usage>
<arguments><item><code>matrix</code></item>{[<code><a href="/link/CairoMatrix?package=RGtk2&version=2.8.8" rd-options="" data-mini-rdoc="RGtk2::CairoMatrix">CairoMatrix</a></code>]  a <code>cairo.matrix.t</code>}
<item><code>dx</code></item>{[numeric]  X component of a distance vector. An in/out parameter}
<item><code>dy</code></item>{[numeric]  Y component of a distance vector. An in/out parameter}</arguments>
<details>dx2 = dx1 * a + dy1 * c;
dy2 = dx1 * b + dy1 * d;
  
Affine transformations are position invariant, so the same vector
always transforms to the same vector. If (<code>x1</code>,<code>y1</code>) transforms
to (<code>x2</code>,<code>y2</code>) then (<code>x1</code>+<code>dx1</code>,<code>y1</code>+<code>dy1</code>) will transform to
(<code>x1</code>+<code>dx2</code>,<code>y1</code>+<code>dy2</code>) for all values of <code>x1</code> and <code>x2</code>.</details>
[object Object]
<keyword>internal</keyword></code>

Facilities in the R language for programming
  graphical interfaces using Gtk, the Gimp Tool Kit.

cairoMatrixTransformDistance: cairoMatrixTransformDistance

Description

Arguments