FReq: (plagiarism) "Select Phong Break" / alt selection mode

[jeric_synergy]

There's an interesting selection mode 'we' should swipe from C4D: "Select Phong Break". Essentially, it's a "Select up to a sharp edge" deal. Nifty. Some hardcore coding there I bet, especially dealing with "looping" conditions.

[Sensei]

How such tool should work?
You select polygon on f.e. cube with 5x5 polys per side, and entire side is selected, because there is 90 degree between sides?
It can be done. Calculate normal vector of polygon, and if it's within range defined by user, select poly, and run in loop.

[jeric_synergy]

Of course it CAN be done: Maxon did it. Here's the options (c4d 'numeric panel'):