lback function.</p>
<div class="fragment"><div class="line"><span class="keyword">static</span> <span class="keywordtype">void</span> key_callback(<a class="code" href="group__window.html#ga3c96d80d363e67d13a41b5d1821f3242">GLFWwindow</a>* window, <span class="keywordtype">int</span> key, <span class="keywordtype">int</span> scancode, <span class="keywordtype">int</span> action, <span class="keywordtype">int</span> mods)</div><div class="line">{</div><div class="line">    <span class="keywordflow">if</span>