the comparsion of float when removing duplicate vertice about meshlab

[alemuntoni]

Well, it depends on the application. If duplicated vertices are there because imported from a format that stores not indexed meshes, it is reasonable because the vertex coordinates are going to be likely the same, and detected with operator ==.
But I agree that for some other applications, an additional tolerance could be useful.

[jmespadero]

To use tolerance in the distances, you can use the filter "Merge close vertices" instead of "Remove duplicates"