tton</a>.</p>
<div class="fragment"><div class="line"><span class="keywordtype">int</span> state = <a class="code" href="group__input.html#gac1473feacb5996c01a7a5a33b5066704">glfwGetMouseButton</a>(window, <a class="code" href="group__buttons.html#gaf37100431dcd5082d48f95ee8bc8cd56">GLFW_MOUSE_BUTTON_LEFT</a>);</div>
<div class="line"><span class="keywordflow">if</span> (state == <a class="code" href="group__input.html#ga2485743d0b59df3791c45951c4195265">GLFW_PRESS</a>)</div>
<div class="line">    upgrade_c