Tiled Clones / Trace: Apply to Size skews resulting clone grid

[Kjohrf]

I have been learning how to use the Trace tab of the Create Tiled Clones dialog,
and think I have come across a bug that is not reported.

I make a small cirlce (.025").

I make a rectangle 1" x 1" and put it at the bottom in a new, lower layer.
I make the rectangle have a gradient fill from corner to corner, black to green.

I select the small circle and go to Create Tiled Clones. I press Reset to clear all setting.
Then on the Trace tab I select Pick: Color, Invert (just to make it more obvious what it
is doing), Apply: Color and Size. 20 x 20, and Use saved size and position of the tile.

The resulting grid of tiled clones skews up as it goes to the right, instead of being
a rectangular grid.

If I de-select Apply: Size, it works correctly, but I don't get the size variation that I
wanted. The Apply: Size selection seems to be broken.

See both examples in the attached file.

[su_v (suv-lp)]

Bug: The 'translate' attribute of the group 'Layer 1' causes the miscalculation of the coordinates of the clones.
Workaround: moving the original ellipse to or creating a new original ellipse on a (new) layer without 'translate' attribute.

workaround A
1) select original ellipse
2) apply 'Edit > Clones > Create Tilde Clones… > Remove'
3) keep original ellipse selected
4) use 'Layer > Move Selection to Layer Below' (image)
5) apply 'Edit > Clones > Create Tiled Clones… > Trace'

workaround B
1) select original ellipse
2) apply 'Edit > Clones > Create Tilde Clones… > Remove'
3) use 'Layer > Add Layer…' above current layer
4) create new original ellipse on the new layer
5) apply 'Edit > Clones > Create Tiled Clones… > Trace'

most likely duplicate of bug #168651 "Tiled Clones" inside transformed groups broken

[Kjohrf (kjohrf)]

Thanks for checking and for the workarounds.

I saw that other bug but couldn't decipher it well. :)

[Kjohrf (kjohrf)]

Note: I just started a new document to try Trace more. I got even a different skewing
pattern. I have only the original Layer ("Layer 1"). As soon as I use "Apply: Size"
there are problems.

[su_v (suv-lp)]

… attach the file and steps to reproduce if you think it's unrelated to the 'tiled clones inside transformed groups broken'.

[Kjohrf (kjohrf)]

It's so random. Sometimes it works. Sometimes it doesn't. But these seems reproceable to me on 0.47pre4 (Win XP still, if that matters).

Open the attached file.
On Create Tiled Clones:
  Pick: Opacity Apply: Color, Size, Opacity 20x20 Used saved size
Works fine.
Remove clones
  Now change Pick to Color. The clones are now partly highly then the rectangle.

[su_v (suv-lp)]

It's the same issue:

| <g
| inkscape:label="Layer 1"
| inkscape:groupmode="layer"
| id="layer1"
| transform="translate(0,-62.362)">

"Layer 1" has a translate() attribute. Remove it and the tiles (with Pick: Color) are correctly positioned.

Linking this report as duplicate to bug #168651 "Tiled Clones" inside transformed groups broken. Feel free to add a comment and revert the duplicate status if you don't agree.

[Kjohrf (kjohrf)]

Thanks. Don't understand what the translate attributes are (from a user perspective), but glad
you've got a handle on it.

[su_v (suv-lp)]

Maybe you find more information (as a starting point) here: <http://tavmjong.free.fr/INKSCAPE/MANUAL/html/Transforms.html#Transforms-Xml>. But I guess from a users perspective attributes like 'translate()' and 'matrix()' are Inkscape internals that can stay hidden in the XML editor (as long as there's no bug ;-).

[su_v (suv-lp)]

Unlinked as duplicate from bug #168651 because the initial patch available there (fixes displaced clones using 'Rotation' mode) does not address the issue with displaced clones in 'Trace' mode.

[Mc (mc...)]

patch committed in rev 13934

[ScislaC (scislac)]

trunk r13934 backported in 0.91.x r13760