hi, guys. I met a problem which annoyed me for a long while. Problem description: Multi-thread rendering different scene graphs in open inventor. 1, (master thread) for on-sceen rendering one scene graph 2, (worker thread) for computation and modification of the scene graph I mentioned in the master thread. At the same time, I am required to do off-sceen rendering with openGL another 2 scene graphs for reading back the depth buffers. However, segmentation default. Questions: 1, should I use threads for each rendering, in my case, 3 threads. 2, how to handle with the GLXContext? 3, I want to implement it both in windows and Linux. what should I note. because i have implemented in windows, althought there is no segmentation fault, but just for seconds. the cpu usage is coming to 100%. Help!!!!!!!!!!!!!!!!!!!

Give us some more info.

What kind of thread synchronization do you use to make sure your threads don't corrupt the scene graph when updating the objects contained in it ?

How do you ensure that, for example, the node just being rendered in thread 1 does not get deleted in thread 2 at the same time ?


Regarding portability of multithreaded applications, I would take a look into pthreads, a well known implementation of posix threads which works the same under windows and linux.

-Markus-