QCAD.org Forum

Yeah, my mistake in rushing things.

A much better release is forthcoming, once I am totally confident in the accuracy and appearance.

Okay dokey at last I have something good enough to post. I am sure CVH wants to close this request. What a champ! The new ellipse functions work flawlessly AFAICT. THANKS again, CVH! You may mark this as done. I'll call this release 0.5 The attached zip file contains text files saved as csv files, r...

I just wanted to provide an update for anyone curious about this project. CVH has completed the work, three new ellipse functions (commands?) are working great. All the error checking and such is in place, I am sure they are quite robust. THANK YOU! I am still working on my part, this request would ...

ELLIPTICORBIT,2031-JAN-11,0.2156351982,263.8396998538,83.8396998538,1.199051567,1.1795024891,0,179.2573094625 ELLIPTICORBIT,2031-JAN-12,0.2156692374,264.8591042406,84.8591042406,1.1991262045,1.1795721403,0,178.0352326103 ELLIPTICORBIT,2031-JAN-13,0.2162886016,265.878420442,85.878420442,1.1997912308...

Bad data, the radius is wrong. Sorry about that. I was in spreadsheet creation mode and didn't check the data itself.

The function looks good as far I can tell. The line width is too wide, but that's ok.

I have complete confidence it is working correctly, let me get new data.

This is great stuff. I am learning from you about the kind of attention to detail needed to do this kind of thing, and you are a good educator so I am sure this info will also be very useful to others in the future. Of course it also makes sense for me as the first user to understand all this under ...

Copy all of that, I am thrilled to have this done professionally and I do not want your nice software to draw errors either. I do not expect to be objecting to anything. :-) The positive rotation direction matches the solar system's rotation direction, so any reversed path would be retrograde and to...

i have some data, the coordinates of the ellipse are in polar coordinates btw I will just be setting the units on the drawing to meters and not worry about a thing with units. So values are all meters or degrees. radius, center theta, center Axis angle semimajor semiminor Start Angle (Type A: zero) ...

The second set for sure. No need to find the perihelion in order to plot the ellipse, it would just be a distraction. The sun is at one of the foci - the "occupied node". The ellipse center AND the other foci are just somewhere in space with no physical relevance. 'Center of mass" does not apply, un...

OK this is cool, I am getting a feel for what's going on. I see that it makes more sense for you to add the capability than for me to hack away at old code, since you're willing. I wasn't worried about error checking because my LISP code will provide totally consistent values, thinking that would ma...

Thank you very very much for the help. This project has been a long saga because I am such a mediocre, brute force, old old school programmer. I just need some help getting over this "last" hurdle. I am all over the math of an ellipse, however. I will have little trouble generating the parameter val...

If I can just add a little capability to the DrawFromCSV package, QCAD is going to be a fantastic solution to my project. Win 10, QCAD 3.27.9.0 build date Jan 16 2023 I need to add the ability to draw ellipses and elliptical paths from data in CSV files. The demo works fine, and has a section for dr...