I have little unusual question/challenge... I want to entmake or create cylindrical HELIX with command through ALISP knowing start/end points on cylinder body and have radius of cylinder or it's WCS origin center point... Start/end points on body may be with different elevations and start point may be once lower then end point, or opposite start point may be higher then end point - then HELIX is going opposite direction... Also if start/end points are at the same elevations then I want to create appropriate ARC entity through entmake-command... For this task you may choose random data for debugging, but you must specify base point of cylinder in WCS and provide correct points data on body of cylinder for start/end points...
So lets see if someone can do it - I find HELIX command pretty complicated in such situations and I think that when routine is finished it may be useful while working in *CAD...
P.S. You must take in consideration that routine should provide both solution HELIXES or ARCS on both sides of cylinder body...
Thanks for your reply in advance, M.R.