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  6.     <title>11.15.¬† Gfig</title>
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  13.     <link rel="up" href="filters-render.html" title="11.¬† Rendering Filters" />
  14.     <link rel="prev" href="plug-in-fractalexplorer.html" title="11.14.¬† Fractal Explorer" />
  15.     <link rel="next" href="plug-in-spheredesigner.html" title="11.16.¬† Sphere Designer" />
  16.   </head>
  17.   <body>
  18.     <div class="navheader">
  19.       <table width="100%" summary="Navigation header">
  20.         <tr>
  21.           <th colspan="3" align="center">11.15.¬†
  22.     <span lang="en" xml:lang="en">Gfig</span>
  23.   </th>
  24.         </tr>
  25.         <tr>
  26.           <td width="20%" align="left"><a accesskey="p" href="plug-in-fractalexplorer.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  27.           <th width="60%" align="center">11.¬†
  28.     <span lang="en" xml:lang="en">Rendering Filters</span>
  29.   </th>
  30.           <td width="20%" align="right">¬†<a accesskey="n" href="plug-in-spheredesigner.html"><img src="../images/next.png" alt="Next" /></a></td>
  31.         </tr>
  32.       </table>
  33.       <hr />
  34.     </div>
  35.     <div class="sect2" lang="en" xml:lang="en">
  36.       <div class="titlepage">
  37.         <div>
  38.           <div>
  39.             <h3 class="title"><a id="plug-in-gfig"></a>11.15.¬†
  40.     <span lang="en" xml:lang="en">Gfig</span>
  41.   </h3>
  42.           </div>
  43.           <div>
  44.             <div class="revhistory">
  45.               <table border="1" width="100%" summary="Revision history">
  46.                 <tr>
  47.                   <th align="left" valign="top" colspan="3">
  48.                     <b>Revision History</b>
  49.                   </th>
  50.                 </tr>
  51.                 <tr>
  52.                   <td align="left">Revision $Revision: 2442 $</td>
  53.                   <td align="left">2006-12-16</td>
  54.                   <td align="left">j.h</td>
  55.                 </tr>
  56.               </table>
  57.             </div>
  58.           </div>
  59.         </div>
  60.       </div>
  61.       <a id="id2776498" class="indexterm"></a>
  62.       <a id="id2776516" class="indexterm"></a>
  63.       <div class="sect3" lang="en" xml:lang="en">
  64.         <div class="titlepage">
  65.           <div>
  66.             <div>
  67.               <h4 class="title"><a id="id2776525"></a>11.15.1.¬†
  68.       <span lang="en" xml:lang="en">Overview</span>
  69.     </h4>
  70.             </div>
  71.           </div>
  72.         </div>
  73.         <div class="figure">
  74.           <a id="id2776536"></a>
  75.           <p class="title">
  76.             <b>Figure¬†16.272.¬†
  77.         <span lang="en" xml:lang="en">The same image, before and after using Gfig</span>
  78.       </b>
  79.           </p>
  80.           <div class="figure-contents">
  81.             <div class="mediaobject">
  82.               <img src="../images/filters/examples/taj_orig.jpg" alt="The same image, before and after using Gfig" />
  83.               <div class="caption">
  84.                 <p>Original image</p>
  85.               </div>
  86.             </div>
  87.             <div class="mediaobject">
  88.               <img src="../images/filters/examples/render-taj-gfig.jpg" alt="The same image, before and after using Gfig" />
  89.               <div class="caption">
  90.                 <p>Filter ‚Äú<span class="quote">Gfig</span>‚Äù applied</p>
  91.               </div>
  92.             </div>
  93.           </div>
  94.         </div>
  95.         <br class="figure-break" />
  96.         <p>
  97.       This filter is a tool: You can create geometrical figures to add them to
  98.       the image. It is very complex. I hope this paper will help you.
  99.     </p>
  100.         <p>
  101.       When using this filter, elements inserted in the image will be placed in
  102.       a new layer. So the image will not be modified, all modifications
  103.       occurring in this layer.
  104.     </p>
  105.       </div>
  106.       <div class="sect3" lang="en" xml:lang="en">
  107.         <div class="titlepage">
  108.           <div>
  109.             <div>
  110.               <h4 class="title"><a id="id2776620"></a>11.15.2.¬†
  111.       <span lang="en" xml:lang="en">Starting filter</span>
  112.     </h4>
  113.             </div>
  114.           </div>
  115.         </div>
  116.         <p>
  117.       You can find this filter through
  118.       <span class="guimenu">Filte<span class="accel">r</span>s</span> ‚Üí <span class="guisubmenu"><span class="accel">R</span>ender</span> ‚Üí <span class="guimenuitem"><span class="accel">G</span>fig</span>
  119.     </p>
  120.       </div>
  121.       <div class="sect3" lang="en" xml:lang="en">
  122.         <div class="titlepage">
  123.           <div>
  124.             <div>
  125.               <h4 class="title"><a id="id2776670"></a>11.15.3.¬†
  126.       <span lang="en" xml:lang="en">Options</span>
  127.     </h4>
  128.             </div>
  129.           </div>
  130.         </div>
  131.         <div class="figure">
  132.           <a id="id2776680"></a>
  133.           <p class="title">
  134.             <b>Figure¬†16.273.¬†
  135.         <span lang="en" xml:lang="en">
  136.           ‚Äú<span class="quote">Gfig</span>‚Äù filter options
  137.         </span>
  138.       </b>
  139.           </p>
  140.           <div class="figure-contents">
  141.             <div class="mediaobject">
  142.               <img src="../images/filters/options-render-gfig.png" alt="Gfig filter options" />
  143.             </div>
  144.           </div>
  145.         </div>
  146.         <br class="figure-break" />
  147.         <div class="variablelist">
  148.           <dl>
  149.             <dt>
  150.               <span class="term">The tool bar</span>
  151.             </dt>
  152.             <dd>
  153.               <p>
  154.             At the top of dialog, you can find a set of icons which
  155.             represents the functions of this filter. Help pop-ups are
  156.             explicit.
  157.           </p>
  158.               <div class="variablelist">
  159.                 <dl>
  160.                   <dt>
  161.                     <span class="term">Functions for object drawing </span>
  162.                   </dt>
  163.                   <dd>
  164.                     <p>
  165.                   On the left part of tool bar, you can find some functions
  166.                   for object drawing. You enable them by clicking on the
  167.                   corresponding icon. You can create the following objects
  168.                   (note that <span class="emphasis"><em>Control points</em></span> are
  169.                   created at the same time as object):
  170.                 </p>
  171.                     <div class="itemizedlist">
  172.                       <ul type="disc">
  173.                         <li>
  174.                           <p>
  175.                       <span class="guilabel">Line</span>: With this tool, you can
  176.                       draw lines. Click on Preview to mark start point, then
  177.                       drag mouse pointer to the end point.
  178.                     </p>
  179.                         </li>
  180.                         <li>
  181.                           <p>
  182.                       <span class="guilabel">Circle</span>: With this tool, you can
  183.                       draw circles. Click on Preview to mark center, then
  184.                       drag mouse pointer to the wanted radius.
  185.                     </p>
  186.                         </li>
  187.                         <li>
  188.                           <p>
  189.                       <span class="guilabel">Ellipse</span>: With this tool, you can
  190.                       draw ellipses. Click on Preview to mark center, then
  191.                       drag mouse pointer to get the wanted size and form.
  192.                     </p>
  193.                         </li>
  194.                         <li>
  195.                           <p>
  196.                       <span class="guibutton">Arc</span>: With this tool, you can
  197.                       draw circle arcs. Click on Preview to set start point.
  198.                       Click again to set another arc point. Without
  199.                       releasing mouse button, drag pointer; when you
  200.                       release mouse button, the arc end point is placed and
  201.                       an arc encompassing these three points is drawn.
  202.                     </p>
  203.                         </li>
  204.                         <li>
  205.                           <p>
  206.                       <span class="guibutton">Regular polygon</span>: With this
  207.                       tool, you can create a regular polygon. Start with
  208.                       setting side number in <span class="guilabel">Tool Options
  209.                       </span> at the right of Preview. Then click on
  210.                       Preview to place center and, without releasing mouse
  211.                       button, drag pointer to get the wanted size and
  212.                       orientation.
  213.                     </p>
  214.                         </li>
  215.                         <li>
  216.                           <p>
  217.                       <span class="guilabel">Star</span>: With this
  218.                       tool, you can create a star. Start with
  219.                       setting side number (spikes) in <span class="guilabel">Tool Options
  220.                       </span> at the right of Preview. Then click on
  221.                       Preview to place center and, without releasing mouse
  222.                       button, drag pointer to get the wanted size and
  223.                       orientation.
  224.                     </p>
  225.                         </li>
  226.                         <li>
  227.                           <p>
  228.                       <span class="guilabel">Spiral</span>: With this
  229.                       tool, you can create a spiral. Start with
  230.                       setting spire number (sides) and spire orientation in
  231.                       <span class="guilabel">Tool Options </span> at the right of
  232.                        Preview. Then click on Preview to place center and,
  233.                        without releasing mouse button, drag pointer to get
  234.                        the wanted size.
  235.                     </p>
  236.                         </li>
  237.                         <li>
  238.                           <p>
  239.                       <span class="guilabel">Bezier's Curve</span>: With this tool,
  240.                       you can create Bezier's curves. Click on Preview to
  241.                       set start point and the other points: the curve will
  242.                       be created between these points. To end point creation
  243.                       press <span class="keycap"><strong>Shift</strong></span> key when creating last
  244.                       point.
  245.                     </p>
  246.                         </li>
  247.                       </ul>
  248.                     </div>
  249.                   </dd>
  250.                   <dt>
  251.                     <span class="term">Functions for object management</span>
  252.                   </dt>
  253.                   <dd>
  254.                     <p>
  255.                   In the middle of tool bar, you can find tools to manage
  256.                   objects:
  257.                 </p>
  258.                     <div class="itemizedlist">
  259.                       <ul type="disc">
  260.                         <li>
  261.                           <p>
  262.                       <span class="guilabel">Move (Object)</span>: With this tool,
  263.                       you can move the active object. To enable an object,
  264.                       click on a control point created at the same time as
  265.                       the object.
  266.                     </p>
  267.                         </li>
  268.                         <li>
  269.                           <p>
  270.                       <span class="guilabel">Move (Point)</span>: With this tool, you
  271.                       can click-and-drag one of the control points created
  272.                       at the same time as object. Each of these points moves
  273.                       the object in a different way.
  274.                     </p>
  275.                         </li>
  276.                         <li>
  277.                           <p>
  278.                       <span class="guilabel">Copy</span>: With this tool, you can
  279.                       duplicate an object. Click on an object control point
  280.                       and drag it to the wanted place.
  281.                     </p>
  282.                         </li>
  283.                         <li>
  284.                           <p>
  285.                       <span class="guilabel">Delete</span>: Click on an object
  286.                       control point to delete it.
  287.                     </p>
  288.                         </li>
  289.                         <li>
  290.                           <p>
  291.                       <span class="guilabel">Select</span>: With this tool, you can
  292.                       select an object to active it. Simply click on one of
  293.                       its control points.
  294.                     </p>
  295.                         </li>
  296.                       </ul>
  297.                     </div>
  298.                   </dd>
  299.                   <dt>
  300.                     <span class="term">Functions for object organisation</span>
  301.                   </dt>
  302.                   <dd>
  303.                     <p>
  304.                   At the right of tool bar, you can find tools for object
  305.                   superimposing (you can also get them by clicking on the
  306.                    drop-down list button if they are not visible). You have:
  307.                 </p>
  308.                     <div class="itemizedlist">
  309.                       <ul type="disc">
  310.                         <li>
  311.                           <p>
  312.                       <span class="guilabel">Raise/Lower Selected Object</span>:
  313.                       With this tool, you can push the selected object one
  314.                       level up or down.
  315.                     </p>
  316.                         </li>
  317.                         <li>
  318.                           <p>
  319.                       <span class="guilabel">Raise/Lower selected object to
  320.                       top/bottom</span>: self explanatory.
  321.                     </p>
  322.                         </li>
  323.                       </ul>
  324.                     </div>
  325.                   </dd>
  326.                   <dt>
  327.                     <span class="term">Functions for object display</span>
  328.                   </dt>
  329.                   <dd>
  330.                     <p>
  331.                   The drop-down list in tool bar offers you some more
  332.                   functions:
  333.                 </p>
  334.                     <div class="itemizedlist">
  335.                       <ul type="disc">
  336.                         <li>
  337.                           <p>
  338.                       <span class="guilabel">Back/Forward</span>: These functions
  339.                       allow you to jump from one object to another. Only
  340.                       this object is displayed.
  341.                     </p>
  342.                         </li>
  343.                         <li>
  344.                           <p>
  345.                       <span class="guilabel">Show all objects</span>: This function
  346.                       shows all objects again, after using both previous
  347.                       functions.
  348.                     </p>
  349.                         </li>
  350.                       </ul>
  351.                     </div>
  352.                   </dd>
  353.                 </dl>
  354.               </div>
  355.             </dd>
  356.             <dt>
  357.               <span class="term">Preview field</span>
  358.             </dt>
  359.             <dd>
  360.               <p>
  361.             Preview comes with several options:
  362.           </p>
  363.             </dd>
  364.             <dt>
  365.               <span class="term">Settings</span>
  366.             </dt>
  367.             <dd>
  368.               <p>
  369.             In this area, you have several options to work with this filter.
  370.           </p>
  371.               <div class="variablelist">
  372.                 <dl>
  373.                   <dt>
  374.                     <span class="term">Tool Options</span>
  375.                   </dt>
  376.                   <dd>
  377.                     <p>
  378.                   This area shows tool options.
  379.                 </p>
  380.                   </dd>
  381.                   <dt>
  382.                     <span class="term">Stroke</span>
  383.                   </dt>
  384.                   <dd>
  385.                     <p>
  386.                   If this option is checked, the object will be drawn. Two
  387.                   buttons are available, to select color and brush type.
  388.                 </p>
  389.                   </dd>
  390.                   <dt>
  391.                     <span class="term">Filling</span>
  392.                   </dt>
  393.                   <dd>
  394.                     <p>
  395.                   With help of this drop-down list, you can decide whether
  396.                   and how the object will be filled, with a color, a pattern
  397.                   or a gradient.
  398.                 </p>
  399.                   </dd>
  400.                   <dt>
  401.                     <span class="term">Show grid</span>
  402.                   </dt>
  403.                   <dd>
  404.                     <p>
  405.                   If this option is checked, a grid is applied on Preview to
  406.                   make object positioning easier.
  407.                 </p>
  408.                   </dd>
  409.                   <dt>
  410.                     <span class="term">Snap to Grid</span>
  411.                   </dt>
  412.                   <dd>
  413.                     <p>
  414.                   If this option is checked, objects will align to the grid.
  415.                 </p>
  416.                   </dd>
  417.                   <dt>
  418.                     <span class="term">Show image</span>
  419.                   </dt>
  420.                   <dd>
  421.                     <p>
  422.                   When this option is checked, the current image is
  423.                   displayed in Preview. If not checked, a white surface is
  424.                   shown and neither stroke color nor brush type are shown.
  425.                 </p>
  426.                   </dd>
  427.                 </dl>
  428.               </div>
  429.             </dd>
  430.           </dl>
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