Posted by Charles P on Sep 03, 2023; 8:16am
URL: https://forum.librecad.org/Distance-along-a-curve-tp5723382p5723387.html

Thank you for the two replies.
Yes, it is a spline.
However, when I select the T>M>Lengthen option, the curve is not able to be selected - my guess is that only a straight line can be selected for this operation.
I also tried dividing the curve at approximately the desired length (25mm), but this is guesswork as there is no display of the length of the curve until the operation is completed and the new curve is selected. Once again, the new, shorter curve is not able to be selected for lengthening. Whilst I can attempt to select the end point of the curve and drag it manually, the length is not displayed until I release the mouse button and so it becomes a guessing game with no option for precision.
What I was hoping for is a menu option that allows for a point to be selected on an object a distance from another point on the same object. I must admit I am not a CAD professional so I don't know if such an option exists on any CAD program.
As a less perfect but acceptable option, how would I place a point on the curve that is in a straight line distance from the origin point? Create a 25mm straight line and move it from point to point? Sounds like a cumbersome operation even if it can be done.