redundant computation would occur if a shared edge contact with another

[stevesjtu]

if an edge shared by two triangles contacts with another edge, the contact pair number should be 1, but it got a result of 2, I think it is perhaps a redundant computation. but I don't know if it is intentional.

[bluekds]

How to count the collision is can be differ depending on the application.

The goal of the library is identifying all collisions.
And since the two triangle sharing a edge is different triangles, the collision count is two.

As you mentioned we can remove some redundant computation for checking the collision and a nice work is available here

• http://dl.acm.org/citation.cfm?id=1342260

Unfortunately, the current version of OpenCCD does not including the culling technique.