Posted by dxli on Mar 29, 2012; 10:17pm
URL: https://forum.librecad.org/Tangent-arcs-circles-or-ellips-tp5604952p5605174.html

Allen,

Currently, I'm in charge of overseeing 2.0 series development, and I'm very interested in expanding geometry features of LibreCAD 2.0. I added several drawing methods for ellipse/cirlce to the 2.0 series already, and I'm eager to add the features requested.

Before I start the implementation process, I would like to have the features well defined. Please let me know whether you would like to add anything to the following,

1, draw a circle tangential to a given circle/arc/ellipse by specifying the center of the new circle. drawing an arc can be done by drawing a circle first, and cut/trim the circle generated.

2, draw a circle tangential to a given circle/arc/ellipse by specifying two points on the circle.

3, draw an ellipse tangential to a given circle/arc/ellipse by specifying the ellipse center and two points on the ellipse.

4, draw an ellipse tangential to a given circle/arc/ellipse by specifying the ellipse center, major axis direction/radius.

We don't have many developers available for testing, please help us by testing the new features in my own development branch ( https://github.com/dxli/LibreCAD ) before I merge them to the main tree.

other features I was thinking about:

to complete conic sections by adding drawing methods for hyperbola and parabola, since I'm not an engineer, I'm not sure whether those conic sections are useful in a CAD.

Donations are always welcome. As a free software project: we care the most about the quality of our software, not market share or revenue generated.

Thanks for reporting!

dxli

Allen wrote

I have used other CAD programs that allow you to draw circles that are tangent to one another.
I'm not seeing a function for that in LibreCAD, have I missed something??

Some of the "edit" functions available in the menu bar are not shown in the side pallet.
Can they be added??

This program could be an important addition to my business, if I can get it to do what is needed I would be inclined to make donations (plural) to keep it up and running.

You help me, I'll help you!!!

LibreCAD is a fantastic start, I hope this works for us both.

Allen