[vtkusers] Help!About Extract a Irregular VOI from Volume Model

[sakiel]

hi, All VTKUsers,
I built a 3D model by Class vtkVolumeRayCastMapper.Now i want to draw a irregular loop(convex or concave) by mouse interactively so that i can keep the volume of interesting inside or outside this loop.how can i realize this goal?i hope i describe my problem clearly.
Thank you very much.
Yu Tang





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