Store Polyline in one cell about pyvista-support

[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!