QT C++ code samples

Hi Tom,

I hope your machine parts will look nice after painting !

Today i did my first autonest experiment.

After a long time thinking how to start this. I had an idea.

What you see on the picture are in fact tiny dot's or points, to visualise the output for this moment.
Behind the scene i started with an 2 dimensional array.

for x, the array is 3000 places / mm points.
for y, the array is 1500 places / mm points.
like : int mm_points[3000][1500];

The idea is, every mm xy position (like pixel position) has a point with a identity. for example : empty space id, object id number, etc.

During auto nesting we can scan each x- and y row of the table for free space.. and where to start the next object.

Scanning example :


Also we can calculate how much space is left in x and y direction though the scanning of free mm point's that are beside each other.
Wich can result in a reqtangular or circular space that can be used for placing a dxf object later on in the process.

This is my first example.. Not bad.. It has not really a good logic at this moment. Just started up. But i think this way of programming can result in nice output's in the future.

First autonest attempt :

Furniture builders use a software that does nothing more than that, namely you enter part dimensions and it arranges them so the minimum material is waisted. I have no idea what it is called, there might be several versions of it, i just know it exist and they use it since i have serviced a lot of wood cnc routers for them,.

It is called "nesting" and I have yet to find a program that can do it better than a person (quicker yes, but better no.)
(This is one of the main things I do at work all day.)

deepnest.io/

Hi there,

A little project update..

The outside and inside contour recognize is almost done.
It works for nested inner-inner-inner.. objects. I want to add the logic that the g-code will start at the most inner product.
This logic is not available in sheetcam at the moment.

When i am satisfied i go on with triangelation of the objects (solid). This will give a nice look..The triangulation is already tested, so can be finished quite quickly.

After making the solids, we do the contour offset class. This class is quite easy to do. The most difficult part's are done, exept the autonesting !

For autonesting i can advise you to use plater. It works for stl drawings. It can be downloaded at github. The algoritme they used
is has my interests.My interest's are also to inplement the stl file format into the cad program. Stl file format is not as accurate
as a dxf file, but i think i can combine stl with dxf. More about this later on.

Have a good day !

Wouldn't it make more sense to start from the outside and work in, because the outer cut should always be a male cut, but the inside could be female or male.
if you are cutting a piece with a window the inner cut is female, if you are cutting a piece out of the scrap in the window, the inner cut would be male.