Mask and other small conveniences

Created by: zeffii

from: https://github.com/nortikin/sverchok/issues/1552

Masks(new masking nodes 1. https://github.com/nortikin/sverchok/pull/1559 2. https://github.com/nortikin/sverchok/commit/967613f82efb76b5d2f98b3727025d81588dad77 )

Polygon Face Mask Selection needs a way to just do List Mask by providing index: 1,5,12, etc I know this can be done already the hard way. Just like if use give 1,5, and we compare with range 0-6, we get False, True, False, False, True, False.

Good point, I agree (and have touched on the subject in the past). This would be implemented per node, preferably using a utility function that turns a list of indices into a mask list.

def mask_list_from_indices(mask_indices, data_to_mask):

It should take both... and be able to determine automatically (if it encounters values in the mask list above 1.. so if it gets 0,0,0,01,1,1,1,0,0,0, it does the regular thing.. but if it gets 1,5,12, it knows that those are not booleans/onoff, and will generate 0,1,0,0,0,1,0,0,0,0,0,0,1

Vector interpolation

A similar case can be made for vector Interpolation, rather than forcing us to pass float-lists between 0 and 1, the node can detect if we pass it an integer, it should generate the float-list by itself internally. If we pass it a 10, it should generate 0.0, 0.1 ..... 1.0

Lathe (done https://github.com/nortikin/sverchok/commit/cb11acc86e4f827e9f72662ec6ba5e72fc4f1844 )

interpret incoming Verts as sequential, if edges are not supplied.

            if medges:
                if verts_match_edges or (idx <= len(medges) - 1):
                    final_values['edges'] = medges[idx]
            else:
                final_values['edges'] = [(i, i+1) for i in range(len(verts)-1)]