How to only get the 'visible' part of an intersection curve

[jeffoulet]

Hi,

Here’s my problem:

• I’m intersecting a closed shape (blue, a sphere for the example, but it can be anything else) with a set of other objects (black)
• this produce a set of intersection closed curves (red)
  
  

Is there any easy way (and possibly computationally light) to discriminate the ‘visible’ portions of curves (green), and discard each curve that lie behind the blue shape? Maybe also using Rhinocommon?

Thanks for your help!