1<?xml version="1.0" encoding="UTF-8"?> 2<!DOCTYPE sect2 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" 3 "http://www.docbook.org/xml/4.3/docbookx.dtd"> 4<!-- section history: 5 2019-05-14 j.h: update to v2.10.10 6--> 7<sect2 id="gimp-filter-motion-blur-circular"> 8 <title>Circular Motion Blur</title> 9 10 <indexterm> 11 <primary>Filters</primary> 12 <secondary>Blur</secondary> 13 <tertiary>Circular Motion</tertiary> 14 </indexterm> 15 <indexterm> 16 <primary>Circular Motion Blur</primary> 17 </indexterm> 18 19 <sect3> 20 <title>Overview</title> 21 <figure> 22 <title>The Circular Motion Blur filter</title> 23 <mediaobject> 24 <imageobject> 25 <imagedata fileref="images/filters/examples/taj_orig.jpg" 26 format="JPG"/> 27 </imageobject> 28 <caption> 29 <para>Original</para> 30 </caption> 31 </mediaobject> 32 <mediaobject> 33 <imageobject> 34 <imagedata fileref="images/filters/examples/blur-taj-circular.jpg" 35 format="JPG"/> 36 </imageobject> 37 <caption> 38 <para>Blur applied</para> 39 </caption> 40 </mediaobject> 41 </figure> 42 <para> 43 This filters creates a circular blur around a center. The default center 44 is the center of the layer or selection. You can set center somewhere in 45 the layer and this center is applied to the layer or to a selection if it 46 exists. 47 </para> 48 </sect3> 49 50 <sect3> 51 <title>Options</title> 52 <figure> 53 <title><quote>Circular Motion Blur</quote> filter options</title> 54 <mediaobject> 55 <imageobject> 56 <imagedata format="PNG" 57 fileref="images/filters/blur/circular-options.png"/> 58 </imageobject> 59 </mediaobject> 60 </figure> 61 62 <variablelist> 63 <varlistentry> 64 <term><guilabel>Presets</guilabel>, <guilabel>Preview</guilabel>, 65 <guilabel>Split view</guilabel></term> 66 <listitem> 67 <para> 68 These options are common to GEGL-based filters. Please refer to 69 <xref linkend="gimp-filters-common"/>. 70 </para> 71 </listitem> 72 </varlistentry> 73 74 <varlistentry> 75 <term><guilabel>Center X</guilabel></term> 76 <term><guilabel>Center Y</guilabel></term> 77 <listitem> 78 <para> 79 Here, you can set the rotation center. Sliders and spin buttons 80 control the position of rotation center on horizontal and vertical 81 axis. You can also click on the rectangle button with an arrow on 82 the right and then click on the image to pick coordinates. 83 </para> 84 </listitem> 85 </varlistentry> 86 87 <varlistentry> 88 <term><guilabel>Angle</guilabel></term> 89 <listitem> 90 <para> 91 More Angle will result in more blurring in a circular direction. 92 </para> 93 </listitem> 94 </varlistentry> 95 96 <varlistentry> 97 <term><guilabel>Use selection as input</guilabel></term> 98 <listitem> 99 <para> 100 Explained in <xref linkend="gimp-filter-pixelize"/>. 101 </para> 102 </listitem> 103 </varlistentry> 104 105 <varlistentry> 106 <term><guilabel>On-canvas controls</guilabel></term> 107 <listitem> 108 <para> 109 This option (default) allows you to modify blur settings directly 110 on canvas, for easier visual tweaking of blur settings. It displays 111 a line with handle on both ends to move rotation center and 112 transform. 113 </para> 114 <para> 115 Press <keycap>Alt</keycap> key to only move rotation center without 116 transforming. 117 </para> 118 <para> 119 Press <keycap>Ctrl</keycap> key to rotate by 15° steps. 120 </para> 121 </listitem> 122 </varlistentry> 123 </variablelist> 124 </sect3> 125</sect2>