z value at intersection points in 3d polyline and polyline

[jaychandran]

Any Lisp to find the difference in z value at intersection points in 3d polyline and polyline,

[Kent1Cooper]

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@jaychandran wrote:

Any Lisp to find the difference in z value at intersection points in 3d polyline and polyline,

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Welcome to the Forums!  This is not a version-specific issue, so I would suggest you put it out there on the Customization Forum instead.  But when you do, can you be more specific?  You could just use the ID command with INTersection object snap and look at the Z coordinates returned, but are you looking for a routine to do something different?  For instance, to have the User be asked to select two intersections, and to report on the difference in elevation between them, or save it to be used in some calculation?  Or make a list of the elevations at all intersections of a selected 3DPolyline with the contour-line LWPolylines?  Or...?

[jaychandran]

Hi,

  Not a single polyline, to check one by one. There is lot of polyline.That ask any lisp for check this type