QT C++ code samples

Hi,

A little project update..

Integrated to the cad side :

- draw ellipse. => color white
- draw cubic bezier curve. => color red
- draw a cubic hermite spline. => color orange.

integrated snap functions : endpoint, midpoint, nearest, perpendicular, tangent, ortho.

Todo : chamfer and fillet functions..

Hi,

Thank you all for the thank you's.

The chamfer and fillet algoritmes are ready and tested. It works nice..
Later on i have to expand the chamfer and fillet function for a fillet between a arc with a line.. I will put this on the list.
For now it's ready for line -> line chamfer and fillet. Oke i am satisfied so far.



At the moment implementing more and more keyboard automation.

Will test to implement a letter fonds in the program based on a dxf drawing for each letter. In this way each font can have
a font directory with the dxf letters from a to z and from 0 to 9.
In this way the text can be inserted by typing the keyboard, and can be used directly with the cnc.

Using the OpenGL way for letter fonts, can be frustrating and useless for cnc.

So far so good..

Maybe you could convert fonts to dxf with this.
www.thingiverse.com/thing:96714

Seems like its had a bit of input from Linuxcnc guys.

Hi Rod,

Thanks for your input.

I coded a text class where it looks at the keyboard buttons and pick's up matching dxf letters from the font directory.
It scale's them to user defined text height, and colors them to the current used color. It's a quite easy code after all.

Hi,

A little project update.

Integrated keyboard functions for creating a rectangular or line from absolute or relative keyboard coordinate inputs.

Added linetype's to the program. I hope to integrate the dimension class coming time.
Made a sample drawing. I am satisfied so far.

I hope to start the cam side soon !!

Ohh, i remember we need a printer function for printing the drawing on a deskjet..
Maybe add a A1 template also..

Last update for today.. I think it's quite nice info.

For the cam application i was thinking how to define if a contour is cw (clockwise) or ccw (counterclockwise) for a long time.
We need this to know if we want a correct automated contour offset.

But today i did several contour test's with a tiny formula, and it is satisfying the program needs so far.

In the past we made the cam offset logic at this page : forum.linuxcnc.org/41-guis/36768-qt-c-code-samples?start=70
I remember a conversation with John.
But at that time i was guessing on wich side the contour offset had to be done..

Attached a code example if contour is cw or ccw. Is the result (sum) positive, the contour is cw.
Is the result negative, the contour is ccw.

We can calculate wich line's are members of the outer contour.. This one get's a outside cw offset for plasma..
if the contour is a rearranged ccw, we flip it into a cw, and done..


One good thing to mention. It works also on open contours. So if a drawing is not correct, it will do the job. We can build in a closed contour fault margin, let's say lines that are not connected within 1 mm are accepted as closed contour.

Little project update..

Made a sample drawing to find out the program functionality at the moment.
I have work on several tiny cases.

To make this drawing, multiple modify functions are used like :
- offset, rotate, copy, move, mirror, chamfer, fillet
The used draw functions :
- line, line_strip, 2p_circle, 6 side polygon, ellipse, arc

For now i am satisfied so far.
Hopely within a few day's we can start with the g_code processing part.. This will become fun for sure..

I wish everyone a good day !

@Thank you Tom..

I googled "drooling", i understand it now.

Today i solved most of the tiny cases..

Added today :
-add shift key for anti select an item.
-keyboard input distance for copy with ortho
-added a angle start and angle recalculate function after a arc mirror
-added midpoint for chamfer line
-added arc curve midpoint for fillet arc
-added arc fillet endpoints to curve.

Have to do left :
-expand the dxf write file and read file class for ellipse and bezier curve and spline.. This is not difficult to do
-add arc-arc trim, arc-line trim, arc-arc extend, arc-line extend
-add arc-line fillet, arc-arc fillet
-add select previous object
-add dimension class
-change the extend and trim icons into a more fancy icon

Thinking about :
1. Excel file output on top of a dxf file output.
This excel file output is usefull when a calculation program is linked with python. All drawing parameters are available.

2. Autonesting algoritme..

3. Fractal based patterns.. or something to do with fractals and random calculation. Also a time based or animation based
calculation is interesting to do. But it has to be usefull within the cad cam program.

For autonesting the output must be something like this :
-orange = 1500x3000mm plate
-red = outside contour
-yellow = inside contour


How would you code this?

if else.. area 1 > area 2.. check longest object, etc.. Input about autonesting thought's is welcome !