Store Polyline in one cell

[laserman781]

Using pyvista.lines_from_points I create polylines, although each cell contains lines for each connection to point. Is there a way to make it so that it recognizes the entire polyline as a cell?

How can I solve this? Thanks!

def create_line(lines):
    lines_frame = {}
    poly_array =lines[['Name','x', 'y', 'z']]
    n_dh = poly_array['lines'].nunique()
    n_rows = len(poly_array)
    for i in range (0,n_dh):
        lines_frame['poly_array{}'.format(i)] = poly_array[poly_array['Name'] == i]
    for i in range (0,n_dh):
      lines_frame['coords{}'.format(i)] = (lines_frame['poly_array{}'.format(i)])[['x', 'y', 'z']].values
    for i in range (0,n_dh):
        for j in range (0,n_rows):
            if (poly_array['Name'] == i) is True:
                lines_frame['coords{}'.format(i)] = np.append(lines_frame['coords{}'.format(i)],poly_array[poly_array['Name'] == i])
            else:
                continue
    return drillhole_frame

def poly_line(lines):
    lines_frame= create_line(lines)
    poly_array = lines[['Name','x', 'y', 'z']]
    n_dh = poly_array['Name'].nunique()
    for i in range (0,n_dh):
        lines_frame['poly_segments{}'.format(i)] = lines_from_points(lines_frame['coords{}'.format(i)])
    return line_frame

[banesullivan]

Have you experimented with the different types of lines in this example?: https://docs.pyvista.org/examples/00-load/create-spline.html

If you sort the points in order, then you can create a poly line cell for all of them using the function:

def polyline_from_points(points):
    poly = pv.PolyData()
    poly.points = points
    the_cell = np.arange(0, len(points), dtype=np.int)
    the_cell = np.insert(the_cell, 0, len(points))
    poly.lines = the_cell
    return poly

[laserman781]

Upon trying the code above I receive this error:

~\Desktop\Jupyter Notebook\Plotter_R4.py in lines_from_points(points)
     64     the_cell = np.arange(0, len(points), dtype=np.int)
     65     the_cell = np.insert(the_cell, 0, len(points))
---> 66     poly.lines = the_cell
     67     return poly
     68 

~\AppData\Local\Continuum\anaconda3\lib\site-packages\pyvista\core\pointset.py in lines(self, lines)
    205         if lines.ndim == 1:
    206             div = lines.size / 3.0
--> 207             assert not div % 1, 'Invalid lines array'
    208             nlines = int(div)
    209         else:

AssertionError: Invalid lines array

My points are in order before I apply this function.

[banesullivan]

This was fixed on the last release of PyVista. Would you please make sure you are using the latest version of PyVista:

pip install -U pyvista

[laserman781]

Worked perfect, thanks!