Possible offset issue - degenerate example case provided

LightBurn Software Questions
1

I think I’ve isolated an unexpected Offset behavior in LightBurn 2.1.02.

Steps to reproduce

  1. Draw a rectangle.
  2. Draw an open line completely inside the rectangle.
  3. Select both.
  4. Run Offset.

Observed: The rectangle offsets, but the enclosed open line is ignored.

Control tests:

  • Rectangle alone → offsets.
  • Line alone → offsets.
  • Move the line outside the rectangle → both offset.
  • Make the line cross the rectangle → both offset (after the Boolean warning).
  • Toggle “Outer Shape Only” → no change.
2

Screen shot of your settings and your preview page.

Then post pictures of your results. We are a visual orientated crowd and seeing what you are seeing is a lot easier than seeing what you are saying. :wink:

3

image
image652×729 15.3 KB

image
image716×600 22.4 KB

image
image806×416 6.45 KB

image
image612×495 16.6 KB

4

I tried the explanation and mine did the same thing. Big box with line not even close to the box borders. Offset showed on the box but not the line. However, the line could be offset if selected by itself.

Offset Test.lbrn2 (70.4 KB)

5

A would there be a difference if the box and line are in a group? Or if the middle example is boolean welded?

6

Per the Docs:

image
image2116×312 14.3 KB

.
But if you add an outer shape:
image
image2039×986 86 KB

.
Also pay attention that for the “next” enclosed shapes the offset is reversed, in the way “Outward-reversed-outward-reversed and so on” a similar math to how Fill works.
image
image1352×853 30 KB

8

I tried all 3 options because I knew somebody would ask.