<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><div><font face="'times new roman', 'new york', times, serif">Hi All, </font></div><div><font face="'times new roman', 'new york', times, serif"><br></font></div><div><span style="font-family: 'times new roman', 'new york', times, serif; ">- My application has Frame Buffer Object (FBO) for off-screen rendering ( I used GLUT to init OpenGL Context- i.e. trick of invisible GLUT window) </span><br></div><div><font face="'times new roman', 'new york', times, serif">- When I display/visualize data using VTK function/class as obviously it take-over/create-new OpenGL context </font></div><div><font face="'times new roman', 'new york', times, serif">- Then I delete all VTK related functions/classes</font></div><div><font face="'times new roman', 'new york', times, serif">- Now when I tried to work with FBO it
does-not-work/has-invalid-state. </font></div><div><font face="'times new roman', 'new york', times, serif"><br></font></div><div><font face="'times new roman', 'new york', times, serif">Questions, </font></div><div><font face="'times new roman', 'new york', times, serif">1. What is the best/easiest solution to get back OpenGL Context after data display/visualization using VTK? </font></div><div><font face="'times new roman', 'new york', times, serif">2. Might be building VTK without OpenGL support- however this looks impossible or ...? </font></div><div><font face="'times new roman', 'new york', times, serif"><br></font></div><div><font face="'times new roman', 'new york', times, serif">Thank you so much, </font></div><div><font face="'times new roman', 'new york', times, serif">Rudra</font></div></div></div></body></html>