Hi everyone!!

First of all, sorry if my english is not perfect, I am not a native.

I've been working with OpenCV to capture images from a webcam and using its functions to proccess this images. I needed to detect a marker for which I used ARToolKit, but just for that, detecting the marker. Everything is fine until here.

Now, I need to draw a kind of blackboard according to the marker, for which OpenGL is perfect for perspective transformation and so on. My problem is that I can't achieve that. I don't know how to say to OpenGL "you guy, draw that blackboard within this opencv window"

Is it impossible what I want to do? I am desperate... any help would be great. Thanks in advance