Question about Plugins

Hi, I'm new to Librecad. I study LibreCAD about 6 months. I added a triangulation of areas, the calculation of the characteristics (area, moments of inertia, principal axes) example rendering: Also added a class RS_3Dface and changed add3dface function. Now I'm learning plugins. Have a question, can I add a call to the plugin not only the menu but also to make a button, for example, add it to the Cadtoolbarmain? sorry for my english

Looks great!

I would want these features in LibreCAD directly, instead of staying as plugins.

About triangulation, how do you do that? can we extend this to:

1, arc/circle border;
2, ellipse border;
3, voronoi triangulation;
4, better integrated with current hatching method, and improve the hatching method.

dxli

Hello, dxli! I used a ready-made library for triangulation in my project (calculation of the moment of inertia of the torsion and shear stress using the finite element method). This library is written by Jonathan Richard Shewchuk (http://www.cs.berkeley.edu/ ~ jrs /) and is called the "Triangle". LibreCAD I used to create the beam section and visualization of the "Triangle". "Triangle" can do voronoi triangulation. Arcs and circles are divided into several segments (lines) in my project, I used 72 lines to one circle. Ellipses I did not realize (I do not need).

hi,

I am thinking about a general way to do this:

pack some points into an enclosed area (by regular grid points, or by some simulated best packing, etc.)
do voronoi of these points;
trim the borders going out of border of the area.
connect nearest neighours
find a way to handle border points
I would like to see Voronoi in LibreCAD anyway.

dxli

It is a good idea. For the Voronoi diagram, you can use algorithms from the boost. Doc.

What can you say about my question about the plugin?

It's great to rely on boost which is already in LibreCAD deps. I was thinking about to pull in CGAL.

Can you help the development process? I am thinking about releasing 2.0.0 soon and fork a 2.1 branch.




--
Dongxu Li, Ph.D.
www.librecad.org

I'm not a professional programmer. And new to the QT.
CGAL is very good and a large library, it would be good to use it in LibreCAD.

When I looked last year at CGAL it wasn't suitable for our purpose because

I suppose we should implement these features into LibreCAD directly, so we will add GUI(button/menu, etc.) support accordingly. I can help on the GUI part.

To Ries: CGAL can do intersections, up to quadratic, i.e., line-line, line-circle, circle-circle, line-ellipse, but no ellipse-circle.

http://www.cgal.org/Manual/latest/doc_html/cgal_manual/QP_solver/Chapter_main.html#Section_10.4