Slice skips a lot of vertexes

[casperlamboo]

More as half of the vertexes get lost while slicing. See attached screenshot. The problem only appears when slicing in the direction of the face normals.

not sure if same problem as #3

[casperlamboo]

not same problem as #3, #3 is sloved this issue still exists

[casperlamboo]

Problem has something to do with normals. When I turn of the path direction check the algorithm works fine

With direction check (layer 218 of dom.stl)

Without correction check (layer 218 of dom.stl)

The direction check compares the normals of the face and the normals of the path.