This filter creates a linear blur in a direction determined by the “Angle” option. The default direction is horizontal to the right (0.000 degree).
These options are common to GEGL-based filters. Please refer to 第 2 节 “Common Features”.
In this case, “Length” represents the blur intensity. More Length will result in more blurring.
“Angle” describes the direction of the movement. Thus, a setting of 90 will produce a vertical blur, and a setting of 0 will produce a horizontal blur.
Explained in 第 3.4 节 “Pixelize”.
This option (default) allows you to modify blur settings directly on canvas, for easier visual tweaking of blur settings. It displays a line with handle on both ends to vary direction and transform.
Press Ctrl key to change direction by 15° steps.