Rhinoceros with python script: CurveThroughPoints (rs.AddInterpCurve) after sorting the points
I have a few points with witch I want to make a CurveThroughPoints. This is not a problem when doing it manually but when I tried that with python script using
rs.AddInterpCurve, it generated strange looping curve. It's quite obvious the order of the points *1 is used for drawing the curve, instead of using the distance to the next point which is likely to be used in the CurveThroughPoints. Therefore, to my understanding, I have to sort the points by myself. So I did that.
Assuming you have a layer "pts_test1" containing the points, and an empty layer "crv_test1" where your resultant curve will be placed.
def make_curve_through_points(layer_name_pts, layer_name_crv, deg, ktstyle): ## Obtain the GID of the points rs.CurrentLayer(layer_name_crv) id_points = rs.ObjectsByLayer(layer_name_pts, True) ## Obtain 3D coordinates of each point points_3d =  for i in range(0, len(id_points)): points_3d.append( rs.PointCoordinates(id_points[i]) ) ## Sort the points points_sorted = rs.SortPointList(points_3d) ## Generate the curves rs.AddInterpCurve(points_sorted, degree=deg, knotstyle=ktstyle, start_tangent=None, end_tangent=None) ## Sample usage layer_name_pts = "pts_test1" layer_name_crv = "crv_test1" deg = 3 ktstyle = 1 make_curve_through_points(layer_name_pts, layer_name_crv, deg, ktstyle)
Instead of using
SortPointList, directly specifying the direction with
SortPoints might be necessary depending on the situation.
*1:Perhaps the order of generations of the points, which is held internally and cannot be seen...