Posted by cadman on
URL: https://forum.librecad.org/Repetition-of-action-tp5709857p5709870.html

Hi dxli , I'll try to explain, I accompany it with some pictures, they say a picture is worth a thousand words.

I want to make this figure template pipe.



By calculating or measuring lines know the distances A1, A2, B2 etc, I also know the diameters of the neck and by the number of divisions that interest me, I can start making the template, which will help us understand the shape of the figure for help trace it.



In this example as the figure is symmetrical enough to draw one of the two parts and then perform a symmetry.
I start by marking the point A1, the arc 1-2 is the division of the circumference by the number of divisions, then under the point A2 and followed the AB which is also the largest division of the circumference by the number of divisions.

For these measures would be very interesting to repeat the arc, or better command have a list of variables that you can be assigned a name, for example A1 = 1257,123, before starting the drawing variables would fill and then be a matter of choose them by the name that has been given them.

To use the plot points arc entity, center point and angles.
I position myself at the point that interests me, for example A and mark point 1 introduce the measure as the arc radius, then I have to disable motion the snap to freely set the start point and the end of the arc, as if you were using compass.



This would be the result, the compass markings performed in another layer, just have to put the dimensions of measurement.

This is the basic idea, I think a list of variables, the measure entity, or repeat the last command I would be good for users LibreCAD, but all depends on the effort to implement them, the way I use it is can do the job, but with these features available time and safety to an extent not go wrong would be important.

A greeting.