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Claudeandclaude[bot]
953f15b967
`.room { transition: 0.12s }` interpolates a room's colour and its
fill-opacity / stroke-opacity independently, and the visible opacity is their
product. The states without a fill kept their alpha in the colour with the
default opacity 1 (.overlay transparent, .yard rgba 0.14, .outlined rgba
0.06 / 0.55, .picked rgba 0.25), while .styled writes an opaque colour plus
fill-opacity: var(--room-fill-op). On a change between the two on the same
node one half rose while the other fell, and mid-way the room was darker than
at either end. Opening the space settings on a floor with no fill (the dialog
shows "no fill" as its own colour at alpha 0) flashed every room grey for
~0.1 s, 0 -> 0.241 -> 0; cancelling the dialog after a preview, entering and
leaving the plan editor briefly darkened the fill (0.18 -> 0.317 -> 0.06).
Every .room state now writes an opaque colour plus *-opacity, and
transparent only together with a zero opacity. The transition itself,
.styled and the --room-* variables are unchanged; the space card takes the
same styles. The resting paint is the same: the witness records each state's
colour and visible opacity as dev drew them, and screenshots of seven resting
states (View without fill, with fill and borders, plan editor, room picked for
a merge, yard with and without borders, yard in the plan editor) are
pixel-identical to dev outside the plan editor's tool hint, whose text shifts
by a sub-pixel between runs on dev too.
Witness: new demo/smoke_room_fill_transitions.mjs, deterministic. A
MutationObserver pauses the room's transitions at their first frame right
after Lit commits, and the smoke seeks them through 0..120 ms in 15 ms steps.
Red on dev: fill overshoot 0.241 / 0.125 / 0.137 / 0.134 on the four paths,
stroke 0.241 / 0.242 on the first two. A real colour change of the same room
still runs a fill transition (catches `transition: none`).
A card-mod rule that sets only `fill` on an unfilled room now meets
fill-opacity 0; CHANGELOG and STYLING-HOOKS say to set the opacity with the
colour (the values are generated, STYLING-HOOKS §3.3).
Issue: #746
User-Visible: yes
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018qZfe7YS4rqEMKoVeS3GKd