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I have written two sets of code in C. One is using OpenCV (for marker detection) and another OpenGL (for creating a simple 3D box).
 
But I have no clue how to integrate those two. For example: Displaying the box on detected maker.
 
With the functions of OpenCV such as cvFindExtrinsicCameraParams2,cvRodrigues2 I have obtained the rotation vector and rotation matrix. But I cannot understand how I can pass these points to OpenGL so that it can draw a 3d shape on the detected marker?
Posted 10-Feb-12 23:11pm

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Solution 1

Sounds to me like a job for gluUnProject.
 
Here's the docs: gluUnProject[^]
Here's a quick demo: Nehe's advice for using gluUnProject[^]
Another 'using gluUnProject' page[^]
 
Presumably, you can substitute the talk of mouse cursor position for that of openCV returned co-ordinates. (I Haven't used openCV or gluUnProject before)
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