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<a id="xyin"></a>
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<a id="IndexXyin" class="indexterm"></a>
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<h2>
<span class="refentrytitle">xyin</span>
</h2>
<p>xyin —
Sense the cursor position in an output window
</p>
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<div class="refsect1">
<a id="idm281472867630520"></a>
<h2>Description</h2>
<p>
Sense the cursor position in an output window. When <span class="emphasis"><em>xyin</em></span> is called the position of the mouse within the output window is used to reply to the request. This simple mechanism does mean that only one <span class="emphasis"><em>xyin</em></span> can be used accurately at once. The position of the mouse is reported in the output window.
</p>
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<div class="refsect1">
<a id="idm281472867547544"></a>
<h2>Syntax</h2>
<pre class="synopsis">kx, ky <span class="command"><strong>xyin</strong></span> iprd, ixmin, ixmax, iymin, iymax [, ixinit] [, iyinit]</pre>
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<div class="refsect1">
<a id="idm281472867545336"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>iprd</em></span> -- period of cursor sensing (in seconds). Typically .1 seconds.
</p>
<p>
<span class="emphasis"><em>xmin, xmax, ymin, ymax</em></span> -- edge values for the x-y coordinates of a cursor in the input window.
</p>
<p>
<span class="emphasis"><em>ixinit, iyinit</em></span> (optional) -- initial x-y coordinates reported; the default values are 0,0. If these values are not within the given min-max range, they will be coerced into that range.
</p>
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<div class="refsect1">
<a id="idm281472867541336"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>xyin</em></span> samples the cursor x-y position in an input window every <span class="emphasis"><em>iprd</em></span> seconds. Output values are repeated (not interpolated) at the k-rate, and remain fixed until a new change is registered in the window. There may be any number of input windows. This unit is useful for real-time control, but continuous motion should be avoided if <span class="emphasis"><em>iprd</em></span> is unusually small.
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
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<th align="left">Note</th>
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<p>
Depending on your platform and distribution, you might need to enable displays using the <span class="emphasis"><em>--displays</em></span> command line flag.
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<div class="refsect1">
<a id="idm281472867537080"></a>
<h2>Examples</h2>
<p>
Here is an example of the xyin opcode. It uses the file <a class="ulink" href="examples/xyin.csd" target="_top"><em class="citetitle">xyin.csd</em></a>.
</p>
<div class="example">
<a id="idm281472867535224"></a>
<p class="title">
<strong>Example 1143. Example of the xyin opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<div class="refsect1">
<a id="idm281472687732424"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
<span class="c1">; Audio out Audio in No messages</span>
-odac -iadc --displays <span class="c1">;;;RT audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o xyin.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="c1">; Initialize the global variables.</span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">10</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="c1">; Instrument #1.</span>
<span class="kd">instr</span> <span class="nf">1</span>
<span class="c1">; Print and capture values every 0.1 seconds.</span>
i<span class="n">prd</span> <span class="o">=</span> <span class="mf">0.1</span>
<span class="c1">; The x values are from 1 to 30.</span>
i<span class="n">xmin</span> <span class="o">=</span> <span class="mi">1</span>
i<span class="n">xmax</span> <span class="o">=</span> <span class="mi">30</span>
<span class="c1">; The y values are from 1 to 30.</span>
i<span class="n">ymin</span> <span class="o">=</span> <span class="mi">1</span>
i<span class="n">ymax</span> <span class="o">=</span> <span class="mi">30</span>
<span class="c1">; The initial values for X and Y are both 15.</span>
i<span class="n">xinit</span> <span class="o">=</span> <span class="mi">15</span>
i<span class="n">yinit</span> <span class="o">=</span> <span class="mi">15</span>
<span class="c1">; Get the values kx and ky using the xyin opcode.</span>
k<span class="n">x</span><span class="p">,</span> k<span class="n">y</span> <span class="nb">xyin</span> i<span class="n">prd</span><span class="p">,</span> i<span class="n">xmin</span><span class="p">,</span> i<span class="n">xmax</span><span class="p">,</span> i<span class="n">ymin</span><span class="p">,</span> i<span class="n">ymax</span><span class="p">,</span> i<span class="n">xinit</span><span class="p">,</span> i<span class="n">yinit</span>
<span class="c1">; Print out the values of kx and ky.</span>
<span class="nb">printks</span> <span class="s">"kx=%f, ky=%f</span><span class="se">\\</span><span class="s">n"</span><span class="p">,</span> i<span class="n">prd</span><span class="p">,</span> k<span class="n">x</span><span class="p">,</span> k<span class="n">y</span>
<span class="c1">; Play an oscillator, use the x values for amplitude and</span>
<span class="c1">; the y values for frequency.</span>
k<span class="n">amp</span> <span class="o">=</span> k<span class="n">x</span> <span class="o">*</span> <span class="mi">1000</span>
k<span class="n">cps</span> <span class="o">=</span> k<span class="n">y</span> <span class="o">*</span> <span class="mi">220</span>
a<span class="n">1</span> <span class="nb">poscil</span> k<span class="n">amp</span><span class="p">,</span> k<span class="n">cps</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">outs</span> a<span class="n">1</span><span class="p">,</span> a<span class="n">1</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="c1">; Table #1, a sine wave.</span>
<span class="nb">f</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">16384</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="c1">; Play Instrument #1 for 30 seconds.</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">30</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
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</div>
<p><br class="example-break" />
As the values of kx and ky change, they will be printed out like this:
</p>
<pre class="screen">
kx=8.612036, ky=22.677933
kx=10.765685, ky=15.644135
</pre>
<p>
</p>
</div>
<div class="refsect1">
<a id="idm281472867530152"></a>
<h2>Credits</h2>
<p>Example written by Kevin Conder.</p>
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