<div dir="ltr"><br>I want to add an OpenGl code in an application of VTK.<br><br>For this purpose, <font size="2">I try to draw lines using commands OpenGL.</font>:<br><pre style="font-family: arial,helvetica,sans-serif;">
<font size="2"><b>1) I add this on the top of the program :</b><br><br>#include <GL/gl.h> <br><br></font></pre><pre style="font-family: arial,helvetica,sans-serif;"><b><font size="2">2) I </font>place my OpenGL commands after renWin->Render() but before iren->Start()</b><font size="2"><b> : </b><br>
<br>renWin->Render();<br><br> glBegin (GL_LINES);<br> glVertex2f (-2.5, 2.5);<br> glVertex2f (2.5, -2.5);<br> glEnd ();<br><br>iren->Start();</font></pre><font size="2"><br></font><b>But it doesn't appears.</b><br>
<pre style="font-family: arial,helvetica,sans-serif;"><font><font size="2">did I miss something ?</font></font> <font size="2">How can I do this work ? <br><br>Looking forward to hear from you soon,<br><br>Amine<br></font></pre>
<br></div>