A sprite sorted by Y stood on the bottom of its box. With a shadow or
empty rows under the feet that is too low, so a figure slipped in
front of a tree it should stand behind. The line belongs to the frame,
not the texture, because one texture can hold several sprite sheets.
- New field `sortLine` on a frame: whole image pixels up from the
frame's bottom edge, 0 to the frame height. 0 is stored as nothing,
so old projects stay the same. Shrinking a frame keeps the line
inside it.
- `feetOf` in drawOrder.ts lifts a sprite by the same share of its
box. Scene view, game view, play and picking all use it. In an
animation the line of the frame shown right now counts.
- The texture tab draws the selected frame's line dashed in yellow
with a knob left of the frame. At 0 the line shares the bottom edge
with the nine-slice border and a resize handle, so the knob is
tested first. A line inside the frame can be dragged directly,
tested after the nine-slice lines.
- The inspector has a new "Sorting" section with a "Sort line"
field. Dragging or typing is one undo step each.
Limit: frames of one walk cycle need the same value, set by hand.
Otherwise the figure changes its place in the order while walking.
Tests:
- ./check.sh: 160 files, 2356 tests, CHECK EXIT 0 (before 2350).
- 6 new unit tests in tests/viewport/sort-by-y.test.ts.
- e2e 37 and 39-43: ALL PASSED, 162 checks. New check 37b-ii drags
the knob up 6 px and undoes it, plus the inspector row.
- Counter checks: if feetOf ignores the line, exactly the 3 order
tests fail. If the knob cannot be grabbed, 37b-ii fails.
- The e2e sum in the README is 1380, counted, not yet seen in CI.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The fill of a sliced frame defaulted to `Stretch`. It is `Repeat` now, and the Fill dropdown lists
`Repeat` first.
The saved document keeps writing only the fill that differs from the default, so the key it
carries is now `stretch`, and a frame without it repeats. A frame saved before with the key
absent and meaning stretch would therefore tile; none of the stored projects has one - both sliced
frames on the server carry `fill: "repeat"` explicitly, so they draw as before.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
A sliced frame drew its borders one source pixel to one sprite unit. Pixel-art sheets are small:
a 16px corner on a 400-unit button is a thin line, and the only way around it was a larger image.
The texture now carries `Nine-slice scale` (default 1), next to `Filter`. It sets how many sprite
units one border pixel takes, for every sliced frame of that texture. The UVs stay as they are -
a corner shows the same pixels, only larger or smaller. When the sprite is too small for both
borders they are still scaled down together, now starting from the scaled size. With `Repeat`
the tile size scales too, otherwise a doubled border would sit beside a pattern of the old size.
The value is a schema row, so inspector field, saving and undo come without their own code.
Anything that is not a size above 0 reads as 1, and documents without it draw as before.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
TextureFrame carries optional `border` (left/right/top/bottom) and
`fill` (stretch | repeat); absent keys mean "not sliced", so no format
bump and undo restores the plain frame instead of four zeroes.
The sliced sprite builds its own geometry instead of the shared
UNIT_QUAD: a 4x4 grid, and for `repeat` one quad per tile carrying the
frame cell's real UVs -- tiling in the geometry, not in the sampler, so
a frame out of a sheet cannot pull its neighbour in. Above 64 tiles per
axis it stretches, to bound the buffer.
A sprite narrower than left+right scales both borders down together
until the middle is exactly 0, so the corners meet at a seam and never
overlap.
The texture editor gets four draggable border lines plus the same four
numbers in the inspector. Hit order is resize handles, then the lines,
then the frame body -- handleAt reports 'move' anywhere inside a frame,
so lines placed after it were unreachable.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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