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<head>
<title>GAMGI Interfaces: Text Modify</title>
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<h1>Text Modify</h1>
<div id="notebook">
<ul>
<li><a href="modify_contents.html">Contents</a></li>
<li><span>Position</span></li>
<li><a href="modify_view.html">View</a></li>
</ul>
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<div class="contents">
Change here the position and orientation of a text (or list of texts,
previously selected with Text->Select, when <b>Global</b> is pressed),
in relative or absolute coordinates.
Parameters for empty entries or <b>Local</b> choices remain unchanged.
<h3>Translation</h3>
The origin of a text object, defined as its top left corner,
can be changed using the <b>X</b>, <b>Y</b>, <b>Z</b> entries.
The change can be <b>Absolute</b> or <b>Relative</b> (to the
former origin).
<h3>Rotation</h3>
The orientation of a text object, defined by the Euler angles theta,
phi, psi, can be changed using the <b>E1</b>, <b>E2</b>, <b>E3</b> entries.
The change can be <b>Absolute</b> or <b>Relative</b> (to the former Euler
angles). Euler angles are not addictive, so the text must be
rotated back with the old angles and forward with the new ones.
<p/>
Euler angles in GAMGI are defined as follows: first, the (x, y, z)
referential is rotated theta degrees (between 0 and 180) around the
y axis, then the referential is rotated phi degrees (between 0 and 360)
around the initial z axis, and finally it is rotated psi degrees (between
0 and 360) around the new z axis, always in the direct, counter-clockwise,
direction. If the first Euler angle (theta) is zero, the old and new z axis
coincide, thus (0, 0, 10) and (0, 5, 5) represent the same rotation.
<p/>
By default text objects are on a plane parallel to the screen,
corresponding to Euler angles (0, 0, 0). For this orientation,
<b>Wired</b> (stroked) text objects, and <b>Solid</b> (extruded)
text objects in a layer with an orthographic projection, will
look exactly as normal 2D text messages.
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