Python - creating a curve through points

Scripting
1

I am trying to create a curve which passes through specific point locations.
In Rhino, the command is _curvethroughPt.

What is the Python equivalent? I started out thinking it was rs.AddInterpCurve(points), but this treats the points as control points instead of actually passing through the points.

2

rs.AddInterpCurve should pass the curve through your points. rs.AddCurve will make a control point curve …

–Mitch

1 Like
3

Hi Bluekite,

That is exactly what rs.AddInterpCurve() python function does - creates the curve, the way “CurveThroughPt” command does with “CurveType = Interpolated” option. The curve actually passes through initial points.

If you want the same result, as the “CurveThroughPt” command’s option: “CurveType = ControlPoint”, use the rs.AddCurve() function.

4

OK, I now see that rs.AddInterpCurve did actually pass the curve through my points. The confusion arose when I entered ‘PointsOn’ in Rhino to check the work. The Points which became visible were calculated control points, not the points I had entered as part of my script.

Thanks guys, for your help.

5

what is a better way of making my points visible as part of the Python script? this is what I have now:

points = (0,0,0),(20,10,0),(50,-10,0),(100,50,0),(200,0,0),(250,10,0)

rs.AddInterpCurve(points)

6

Which points? Those from your points tuple?
If that is so, try this:

import rhinoscriptsyntax as rs

points = (0,0,0),(20,10,0),(50,-10,0),(100,50,0),(200,0,0),(250,10,0)
rs.AddInterpCurve(points)

pts_ids = rs.AddPoints(points)
rs.ObjectColor(pts_ids, [255,0,0])
7

Wonderful! thanks so much!