Check if point lies on curve

[dawid.deptula]

How to check if a point (XYZ) lies on Curve?

[RPTHOMAS108]

Two initial ways I can think of:

Use Curve.Project then compare original to projected. Be careful with arcs and ellipses i.e. point should not be on centre or ellipse foci.

There is also Curve.Distance

Solve mathematically given the equation of the curve and the knowns you have then check is within limits of curve.

All of the above require a tolerance value to consider the point to be near enough to be considered on the curve.

[dawid.deptula]

I have found another solution. I simply check directions between Line.pktStart, pktTested and Line.pktEnd. Thanks for another approach.