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d-bl / GroundForge

Bobbin Lace Diagrams : threads from pairs
https://d-bl.github.io/GroundForge/
GNU General Public License v3.0
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Pair diagram shows less stitches than pattern definition #229

Open p3d2 opened 4 months ago

p3d2 commented 4 months ago

Hello!

I'm trying to generate this pattern from Uta Ulrich book: image

And I am trying to use "831R" with the tile layout (-2,1) and (2,1) to generate it.

image

However, when I move to the stitches mode, the pairs don't look correct for some reason.

image

I am likely doing something wrong, but it does not make sense to me how the 3 and R are appearing in the stitches mode.

jo-pol commented 4 months ago

Thank you for your effort to report your problem. I renamed the issue to be more specific.

The short answer: two consecutive stitches with the same two pairs are treated as a single stitch.

This PDF shows the intended thread diagram. The PDF has a link to the web site showing the diagrams. The drop down help menu explains how to create such a PDF.

The solution is based on a rose-ground with the top center stitch ignored by assigning a -. By ignoring this top stitch, the side stitches also form a single stitch with the bottom corners. The result is a Paris ground. Dropping stitches is a buggy feature but works in this case. The feature becomes problematic when dropping the bottom-center stitch, or both(!) side-center stitches. More on a slightly outdated page.

image

You made me realize the dropped stitch is missing in the enumeration of stitches.

p3d2 commented 4 months ago

Thank you for your fast reply!

The short answer: two consecutive stitches with the same two pairs are treated as a single stitch. Does it mean they should be dropped?

I've replicated your example, 5X-X; -7-4 (https://d-bl.github.io/GroundForge/stitches.html?patchWidth=16&patchHeight=16&tile=5X-X,-7-4&shiftColsSW=-2&shiftRowsSW=2&shiftColsSE=2&shiftRowsSE=2&a1=cttttc&d2=tcl&b2=tcr) and it's working as intended. I've also tried to redo the pattern using only 1 line 831R and now I understand my issue better. I didn't knew why the stitch '3' was being shadowed/flagged, and if it's warning that stitches will be merged, then it is a bit hard to distinguish between grays (https://d-bl.github.io/GroundForge/stitches.html?patchWidth=17&patchHeight=16&footside=R,1&tile=831R&headside=8,R&shiftColsSW=-2&shiftRowsSW=1&shiftColsSE=2&shiftRowsSE=1&s1=ct&d1=ct&c1=ct&b1=ct&a1=ct&s2=ct&e1=ctptttpct&a2=ct)

Your work is amazing!