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+* Chickadee: (chickadee).     Game programming toolkit for Guile.
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+<title>Input Devices (The Chickadee Game Toolkit)</title>
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+<span id="Input-Devices"></span><div class="header">
+<p>
+Next: <a href="Window-Manipulation.html#Window-Manipulation" accesskey="n" rel="next">Window Manipulation</a>, Previous: <a href="The-Game-Loop.html#The-Game-Loop" accesskey="p" rel="prev">The Game Loop</a>, Up: <a href="Kernel.html#Kernel" accesskey="u" rel="up">Kernel</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
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+<hr>
+<span id="Input-Devices-1"></span><h4 class="subsection">2.1.2 Input Devices</h4>
+
+<p>While <code>run-game</code> provides hooks for mouse/keyboard/controller
+input events, it is often necessary to query input devices for their
+current state.  For example, it could be desirable to query the state
+of the arrow keys every time the update hook is called to determine
+which direction the player should move that frame.
+</p>
+<dl>
+<dt id="index-key_002dpressed_003f">Procedure: <strong>key-pressed?</strong> <em>key</em></dt>
+<dd><p>Return <code>#t</code> if <var>key</var> is currently being pressed.
+</p></dd></dl>
+
+<dl>
+<dt id="index-key_002dreleased_003f">Procedure: <strong>key-released?</strong> <em>key</em></dt>
+<dd><p>Return <code>#t</code> if <var>key</var> is <em>not</em> currently being pressed.
+</p></dd></dl>
+
+<dl>
+<dt id="index-mouse_002dx">Procedure: <strong>mouse-x</strong></dt>
+<dd><p>Return the current X coordinate of the mouse cursor.
+</p></dd></dl>
+
+<dl>
+<dt id="index-mouse_002dy">Procedure: <strong>mouse-y</strong></dt>
+<dd><p>Return the current Y coordinate of the mouse cursor.
+</p></dd></dl>
+
+<dl>
+<dt id="index-mouse_002dbutton_002dpressed_003f">Procedure: <strong>mouse-button-pressed?</strong> <em>button</em></dt>
+<dd><p>Return <code>#t</code> if <var>button</var> is currently being pressed.
+</p></dd></dl>
+
+<dl>
+<dt id="index-mouse_002dbutton_002dreleased_003f">Procedure: <strong>mouse-button-released?</strong> <em>button</em></dt>
+<dd><p>Return <code>#t</code> if <var>button</var> is <em>not</em> currently being
+pressed.
+</p></dd></dl>
+
+<dl>
+<dt id="index-controller_002daxis">Procedure: <strong>controller-axis</strong> <em>controller axis</em></dt>
+<dd><p>Return a floating point value in the range [-1, 1] corresponding to
+how much <var>axis</var> (an analog stick or trigger) is being pushed on
+<var>controller</var>.  0 is returned if <var>axis</var> is not being pushed at
+all.
+</p></dd></dl>
+
+<dl>
+<dt id="index-controller_002dname">Procedure: <strong>controller-name</strong> <em>controller</em></dt>
+<dd><p>Return the name of <var>controller</var>.
+</p></dd></dl>
+
+<dl>
+<dt id="index-controller_002dbutton_002dpressed_003f">Procedure: <strong>controller-button-pressed?</strong> <em>controller button</em></dt>
+<dd><p>Return <code>#t</code> if <var>button</var> on <var>controller</var> is currently
+being pressed.
+</p></dd></dl>
+
+<dl>
+<dt id="index-controller_002dbutton_002dreleased_003f">Procedure: <strong>controller-button-released?</strong> <em>controller button</em></dt>
+<dd><p>Return <code>#t</code> if <var>button</var> on <var>controller</var> is <em>not</em>
+currently being pressed.
+</p></dd></dl>
+
+
+
+
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