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Re: preparation for 2.0.6, any blocker?

Posted by dxli on Oct 20, 2014; 6:21pm
URL: https://forum.librecad.org/preparation-for-2-0-6-any-blocker-tp5710555p5710561.html

Hi Quenzo,

could you supply test case dxf files? with some specific and simple steps to demonstrate the issues.

For  your item 1: I don't quite understand the problem you described.

For your item 2: I tested:
a. draw a circle;
b, draw a free hand line, which intersects with the circle drawn in step a.
c, Main menu: Modify -> divide
d, select the circle as entity to divide
e, enable snap to intersection only
f, select an intersection generated in step b.

results: the circle is cut at the point selected at step f. No crash.

tan1_2p.dxf

Quenzo wrote
Hi. In advance, some of these issues can be my mistakes, in this case I 'm sorry.

Modify--> Trim / Extend two option

1 The cut between two figures curves (circle, ellipse, or arc) is made according to where on each figure is selected. It can cut two, cut one (especially if it's between the ellipse and the circle cutting the ellipse like with the normal cutting option), and may also extend a figure (especially arcs) when you expected to be cut.
It seems that the application sometimes isn't sure lengthen or trim the curves, and if it has to cut one or two.
However, with the straight lines have no problem.

2 When you try to cut a circle or ellipse intersecting a closed polyline or a freehand line if you select these first, the application breaks and closes.

For your item 3:  we have serious trouble with our equation solver. We will see whether we can improve it.

Have a look at this dxf file, with the red and green circles has similar meaning, and the intersections of those two circles are the two points to pass, and the white circles are the base circles.

a, start tangential circle 1_2p;
b, choose any white circle to draw tangential circles of it;
c, choose the two intersection points between the red and green circles.

ideally, the algorithm should be able to generate both red and green.

tan1_2p.dxf

Draw--> Circle--> tangential 2points option

This option does not work as I expected. I wanted to draw a circle (green) tangential to the small white circle and then going through two points, the left upper and lower corners on the square, but the application draws the red circle. Indeed the two circles meet the two conditions (being tangential and passing through two points), but the application always draws the red circle. I don't know if this is a bug or can be configured differently to make the green circle.

Best regards

Manel