# [Solved] How to get position [x,y,z] of vertex of a Line

Hi,

I'm completely new to Maxscript (and to 3ds max), and I'm trying to do something that sounds very simple but for some reason I cannot find the solution online. Namely, I want to move an object to the position of a selected vertex on a spline. All I'm missing is the script to find the [x,y,z] position of a selected vertex. Can anyone help me out?

## Comment viewing options

### ...

This is the function that you looking for
`getKnotPoint shape spline_index_integer knot_index_integer`
Easy draw a spline, select it and run this code to get print knot positions

```spl = selection[1]
for s = 1 to (numsplines spl) do
(
for k = 1 to (numknots spl s) do (format "spline_%_knot_%_pos = %\n" s k (getKnotPoint spl s k))
)```

See the result in the listener
Also read this topic from MXS Help
http://docs.autodesk.com/3DSMAX/15/ENU/MAXScript-Help/index.html?url=fil...

barigazy

### Thank you for the quick

Thank you for the quick response!

This brings me one step closer to what I want, but I'm not sure I'm there yet. So this code basically gives me all the coordinates of vertices in a selected spline (is that right? I'm still reading through the Maxscript help in Autodesk). But what I'm looking for is just the coordinate of the one vertex I have selected in the spline. I then want to put that coordinate in a point3 variable, so I can then position my object on that location.

eg.:

obj.pos = vert_coordinate

Is there a simple way to do this?

### ...

Yup.
If you have shape with one spline and only one knot selected then

```--this will create box object on selected knot
spl = selection[1] --store selected spline in variable
Box length:5 width:5 height:5 pos:(getKnotPoint spl 1 (getKnotSelection sp 1))```

If your shape contains multiple splines then you need to use for-loop.

barigazy

### When I run this script I get

When I run this script I get the following error:

```\$Line:Line001 @ [6.562747,3.986450,0.000000]
-- Error occurred in anonymous codeblock; filename: ; position: 109; line: 2
--  Frame:
-- Unable to convert: #(2) to type: Integer
OK```

### ...

```spl = selection[1] --store selected spline in variable
Box length:5 width:5 height:5 pos:(getKnotPoint spl 1 (getKnotSelection sp 1)[1])```

barigazy

### This is perfect! Thank you.

This is perfect! Thank you.