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<title>Module bbox — PyX v0.11.1 documentation</title>
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<span class="target" id="module-bbox"></span><div class="section" id="id1">
<h1>Module <a class="reference internal" href="#module-bbox" title="bbox"><tt class="xref py py-mod docutils literal"><span class="pre">bbox</span></tt></a><a class="headerlink" href="#id1" title="Permalink to this headline">¶</a></h1>
<p>The <tt class="xref py py-mod docutils literal"><span class="pre">bbox`</span></tt> module contains the definition of the <a class="reference internal" href="#module-bbox" title="bbox"><tt class="xref py py-class docutils literal"><span class="pre">bbox</span></tt></a> class representing
bounding boxes of graphical elements like paths, canvases, etc. used in PyX.
Usually, you obtain <tt class="docutils literal"><span class="pre">bbox</span></tt> instances as return values of the corresponding
<tt class="docutils literal"><span class="pre">bbox())</span></tt> method, but you may also construct a bounding box by yourself.</p>
<div class="section" id="bbox-constructor">
<h2>bbox constructor<a class="headerlink" href="#bbox-constructor" title="Permalink to this headline">¶</a></h2>
<p>The <tt class="docutils literal"><span class="pre">bbox</span></tt> constructor accepts the following keyword arguments</p>
<table border="1" class="docutils">
<colgroup>
<col width="16%" />
<col width="84%" />
</colgroup>
<thead valign="bottom">
<tr><th class="head">keyword</th>
<th class="head">description</th>
</tr>
</thead>
<tbody valign="top">
<tr><td><tt class="docutils literal"><span class="pre">llx</span></tt></td>
<td><tt class="xref docutils literal"><span class="pre">None</span></tt> (default) for <span class="math">-\infty</span> or
<span class="math">x</span>-position of the lower left corner
of the bbox (in user units)</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">lly</span></tt></td>
<td><tt class="xref docutils literal"><span class="pre">None</span></tt> (default) for <span class="math">-\infty</span> or
<span class="math">y</span>-position of the lower left corner
of the bbox (in user units)</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">urx</span></tt></td>
<td><tt class="xref docutils literal"><span class="pre">None</span></tt> (default) for <span class="math">\infty</span> or
<span class="math">x</span>-position of the upper right
corner of the bbox (in user units)</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">ury</span></tt></td>
<td><tt class="xref docutils literal"><span class="pre">None</span></tt> (default) for <span class="math">\infty</span> or
<span class="math">y</span>-position of the upper right
corner of the bbox (in user units)</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="bbox-methods">
<h2>bbox methods<a class="headerlink" href="#bbox-methods" title="Permalink to this headline">¶</a></h2>
<table border="1" class="docutils">
<colgroup>
<col width="48%" />
<col width="52%" />
</colgroup>
<thead valign="bottom">
<tr><th class="head"><tt class="docutils literal"><span class="pre">bbox</span></tt> method</th>
<th class="head">function</th>
</tr>
</thead>
<tbody valign="top">
<tr><td><tt class="docutils literal"><span class="pre">intersects(other)</span></tt></td>
<td>returns <tt class="docutils literal"><span class="pre">1</span></tt> if the <tt class="docutils literal"><span class="pre">bbox</span></tt> instance and
<tt class="docutils literal"><span class="pre">other</span></tt> intersect with each other.</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">transformed(self,</span> <span class="pre">trafo)</span></tt></td>
<td>returns <tt class="docutils literal"><span class="pre">self</span></tt> transformed by
transformation <tt class="docutils literal"><span class="pre">trafo</span></tt>.</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">enlarged(all=0,</span> <span class="pre">bottom=None,</span> <span class="pre">left=None,</span>
<span class="pre">top=None,</span> <span class="pre">right=None)</span></tt></td>
<td>return the bounding box enlarged by the given
amount (in visual units). <tt class="docutils literal"><span class="pre">all</span></tt> is the
default for all other directions, which is
used whenever <tt class="xref docutils literal"><span class="pre">None</span></tt> is given for the
corresponding direction.</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">path()</span></tt> or <tt class="docutils literal"><span class="pre">rect()</span></tt></td>
<td>return the <tt class="docutils literal"><span class="pre">path</span></tt> corresponding to the
bounding box rectangle.</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">height()</span></tt></td>
<td>returns the height of the bounding box (in
PyX lengths).</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">width()</span></tt></td>
<td>returns the width of the bounding box (in PyX
lengths).</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">top()</span></tt></td>
<td>returns the <span class="math">y</span>-position of the top
of the bounding box (in PyX lengths).</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">bottom()</span></tt></td>
<td>returns the <span class="math">y</span>-position of the
bottom of the bounding box (in PyX lengths).</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">left()</span></tt></td>
<td>returns the <span class="math">x</span>-position of the left
side of the bounding box (in PyX lengths).</td>
</tr>
<tr><td><tt class="docutils literal"><span class="pre">right()</span></tt></td>
<td>returns the <span class="math">x</span>-position of the right
side of the bounding box (in PyX lengths).</td>
</tr>
</tbody>
</table>
<p>Furthermore, two bounding boxes can be added (giving the bounding box enclosing
both) and multiplied (giving the intersection of both bounding boxes).</p>
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<h3><a href="manual.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">Module <tt class="docutils literal"><span class="pre">bbox</span></tt></a><ul>
<li><a class="reference internal" href="#bbox-constructor">bbox constructor</a></li>
<li><a class="reference internal" href="#bbox-methods">bbox methods</a></li>
</ul>
</li>
</ul>
<h4>Previous topic</h4>
<p class="topless"><a href="bitmap.html"
title="previous chapter">Bitmaps</a></p>
<h4>Next topic</h4>
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title="next chapter">Module <tt class="docutils literal"><span class="pre">color</span></tt></a></p>
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