Curve.NormalAtParameter changes results at an angle

[Joseph_Gemperline]

Im having trouble understanding why I get a vector pointing in the y direction when its a vertical line and in the x direction when its slightly at an angle. Im working with detail lines in a section view. I would like it to point perpendicular in the y,z direction. Thanks for the help.

[salvatoredragotta]

You need to create a vector in the direction you want:

Try this:

[Joseph_Gemperline]

Thanks so much. That’s what I needed.