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M3: glass's light is a line on its bevel, and splay turns the bend towards the centre (#1888)

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* M3: glass bends with the reference tool's thick-lens profile and splits its colours over 8 steps (#1885)

The backdrop bends most a 1-unit bevel in from the edge, falls off as the
3.5th power of the way out of the curve to nothing `depth` further in, and
moves a fifth as much on the bevel itself (it fell off as the square of the
way in from the very edge). Dispersion samples each channel at 8 steps along
the bend with a triangular window, red moving furthest and blue least (it was
three samples, blue furthest), as far apart as the reference tool's: at 100%
red and blue move 0.16 of the bend apart (`Glass::DISPERSION_SPREAD`).
`Glass::max_bend` bounds red's furthest step, so the backdrop read around a
pane covers every sample, and the field margin covers the bevel.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M3: glass's bend stays within `max_bend`, checked on a single bright pixel too (#1885)

Review follow-up: the bend reaches `depth` × `refraction` a bevel in from
the edge, so `Glass::max_bend` drops its 0.999 and bounds it, as a test now
checks for several refractions. A single white pixel on black pins the
dispersion's triangular window, which a ramp and a flat backdrop can't tell
from one centred sample. The parity assessment records the bend, the
dispersion and how they were measured against the reference tool.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M3: glass's light is a line on its bevel, and splay turns the bend towards the centre (#1885)

The light is a line on the 1-unit bevel added to the backdrop, as the
reference tool's: fully where the edge faces the light, none below 0.35 of
facing it and 0.6 as much on the opposite side, with a faint gradient across
the curve, 5% darker facing the light and lighter opposite. It was a glow
mixed towards white, as deep as `splay` made it, so `light_reach` goes.

`splay` turns the bend from along the edge's normal towards the way away
from the layer's centre, and no longer widens the light: files with a splay
above 0 look different. The direction to the centre is worked out in the
shape's own frame (`own_frame`, shared with the field cache), so cut renders
match the whole one byte for byte.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M3: cut renders of glass match with splay turning a dispersed bend (#1885)

Review follow-up: the cut-versus-whole test had splay only on looks without
refraction, so no turned bend reached the dispersion. A look with splay 1 and
the default bend and dispersion now renders the same however it is cut. The
parity assessment records the light on the bevel and splay's new meaning.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M3: glass's flat inside skips the bend's curve, and full dispersion stays within `max_bend` (#1885)

Review follow-up: `bend_at` returns 0 straight away past `depth` + the
bevel, where the curve and the bevel's easing are both 0, instead of
working out a power of 0 for every pixel of a pane's flat inside. A test
moves one white pixel along a row under every bend of the profile at full
dispersion and checks that no channel ever reads it further out than
`Glass::max_bend`, which sizes the backdrop read around a pane.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M3: glass's light shows over a transparent backdrop, and its flat inside skips the light (#1885)

Review follow-up: the light was added to the backdrop's colour and then
clamped to the backdrop's alpha, so with nothing under the glass (an
export of the pane alone) the line on the bevel vanished, where the old
glow raised the alpha and showed. Now the alpha rises as far as the lit
colour needs (`lit`), and stays the backdrop's wherever the light fits
under it, so renders over an opaque backdrop don't change.

Past `depth` + the bevel the rim light, the gradient and the bend are all
0, so those pixels take one sample of the backdrop and skip the light's
direction, facing and splay work, as the old glow's `reach` early-out did.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Oleksii Sukholita <oleksii.sukholita@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: FredApps <153173854+FredApps@users.noreply.github.com>
This commit is contained in:
Oleksii SukholitaClaude Opus 5.5Oleksii SukholitaFredApps
 authored and GitHub committed 2026-11-05 22:44:38 +01:00
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ROADMAP.md
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@@ -2,7 +2,7 @@
**Stage: alpha** · next: beta, ~26 points and ~162–292 h away (one Opus 5.5 agent; ~33–67 h wall-clock with 5 agents)
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-02 · **Change:** minor (glass bends with a thick-lens profile and splits its colours over 8 steps; glass effects take variables and keep their frost within 0–100; web host bridge: `?host=parent` or `data-host="page"` hands a page the app's files, documented in the hosting guide; a connector end moved with Cmd/Ctrl held goes on any part of an object, and stays there as the object moves or resizes; a tap on a plugin panel's button keeps what was typed in its fields; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; library analytics list how many layers and files use each style and variable; the Controller menu names each button as PlayStation and Switch controllers do; widgets draw lines and SVG pictures (plugin API 6); a connector end dropped along a side of a shape attaches to that side (#1708); regression tests pin a rounded shape's one-sided stroke and SVG ids and font families without XML-forbidden characters (#1351, #1124); a damaged image is refused with a reason instead of showing as an empty box (#1474); an image copied in another app pastes again on the desktop, and in the browser for the first time (#492); SwiftUI and Compose code names a bound variable by its iOS or Android code syntax; the colour picker's Image tab shows a placeholder and Upload from computer, an asset preview, and a file dropped on it replaces the image, keeping the fill mode, crop and position (#1682); the Frame tool's Phone presets have the iPhone 17 family (#1691); Show in folder works in the Flatpak build and selects the file on Linux (#1701); a dashed line starts and ends with a half-length dash, on the canvas and in exports; the Pages, Layers and Assets search fields keep their text in the middle of the field (#1703); a board connector's path can be reshaped by dragging its path handles (#1710); boards have 16 more shapes (arrows, polygons, star, plus and flowchart symbols), in pickers that lay them out in a grid; library analytics count insertions and show insertions and detachments over the past 30 days, 90 days or year; a stroke's Custom style takes a dash pattern of any length as a comma-separated list (#1681); a control request can set its own timeout, up to 10 minutes (`timeoutMs`; `figcraft-cli mcp --attach PORT --timeout SECONDS`) (#1696); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the keyboard's Menu key opens the context menu, as Shift+F10 does; an Open link action can open in place of the prototype, with "Open in new tab" off (gap 15); a collection of this file can be extended (Extend collection on its row, `variable.extendCollection`), its extension following its edits at once, and extended collections extend again in the file; the eyedropper with Cmd/Ctrl+Shift makes a colour style or variable of what it picks; a live session's welcome sends the document compressed to clients that read it, about seven times smaller (#1665); a control request that times out says truthfully whether it was dropped or is still running and will take effect, and only screenshots and input blame the window (#1673); a board keeps earlier votes' results, listed newest first in Results and deleted one at a time; the object a stamp will stick to is outlined while the stamp tool is over it or a stamp is dragged over it, and board objects take no drops (gap 24); a server can list the files shared from it now for everyone who reaches it, Home ▸ Online shows them and their links carry no secret (`team_files`, part of #742); team library analytics count detached instances per component and file (gap 10); skipping the Open link notice by command is saved with the preferences at once (gap 15); a selected connector's bar on a board sets its start and end points, solid or dashed, its weight and any colour (#1596); cells copied from a spreadsheet paste onto a board as a table; a long layer name stays on one line in the Export button and the Dev Mode header, ending with an ellipsis, and no longer covers the Design panel (#1650); with hundreds of layers selected, the Design panel and the selection overlays stop going over the whole selection on every frame, so dragging 648 layers averages about 1.1 ms of UI per frame (#1571); plugin panels show pictures: an `image` control, base64 within 256 KB and 4,096 px a side, named by its label (gap 6); `.fig` connector labels without a saved snapshot are kept, centred on their line (gap 1); a drag moving many layers re-runs only what sits around them, not each layer's bindings, sizing, text and instance checks, on every move (#1571); damaged font tracking table offsets are checked instead of wrapping on 32-bit targets, and font indexing makes its existing offset bounds explicit (#1125); Bosnian (`bs`) draft catalog; text style dedupe is O(spans) via a last-two cache and fingerprint buckets (#1102); pasted layers whose image the clipboard lacks are Line truncated
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-02 · **Change:** minor (glass's light is a line on its bevel and splay turns the bend towards the centre; glass bends with a thick-lens profile and splits its colours over 8 steps; glass effects take variables and keep their frost within 0–100; web host bridge: `?host=parent` or `data-host="page"` hands a page the app's files, documented in the hosting guide; a connector end moved with Cmd/Ctrl held goes on any part of an object, and stays there as the object moves or resizes; a tap on a plugin panel's button keeps what was typed in its fields; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; library analytics list how many layers and files use each style and variable; the Controller menu names each button as PlayStation and Switch controllers do; widgets draw lines and SVG pictures (plugin API 6); a connector end dropped along a side of a shape attaches to that side (#1708); regression tests pin a rounded shape's one-sided stroke and SVG ids and font families without XML-forbidden characters (#1351, #1124); a damaged image is refused with a reason instead of showing as an empty box (#1474); an image copied in another app pastes again on the desktop, and in the browser for the first time (#492); SwiftUI and Compose code names a bound variable by its iOS or Android code syntax; the colour picker's Image tab shows a placeholder and Upload from computer, an asset preview, and a file dropped on it replaces the image, keeping the fill mode, crop and position (#1682); the Frame tool's Phone presets have the iPhone 17 family (#1691); Show in folder works in the Flatpak build and selects the file on Linux (#1701); a dashed line starts and ends with a half-length dash, on the canvas and in exports; the Pages, Layers and Assets search fields keep their text in the middle of the field (#1703); a board connector's path can be reshaped by dragging its path handles (#1710); boards have 16 more shapes (arrows, polygons, star, plus and flowchart symbols), in pickers that lay them out in a grid; library analytics count insertions and show insertions and detachments over the past 30 days, 90 days or year; a stroke's Custom style takes a dash pattern of any length as a comma-separated list (#1681); a control request can set its own timeout, up to 10 minutes (`timeoutMs`; `figcraft-cli mcp --attach PORT --timeout SECONDS`) (#1696); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the keyboard's Menu key opens the context menu, as Shift+F10 does; an Open link action can open in place of the prototype, with "Open in new tab" off (gap 15); a collection of this file can be extended (Extend collection on its row, `variable.extendCollection`), its extension following its edits at once, and extended collections extend again in the file; the eyedropper with Cmd/Ctrl+Shift makes a colour style or variable of what it picks; a live session's welcome sends the document compressed to clients that read it, about seven times smaller (#1665); a control request that times out says truthfully whether it was dropped or is still running and will take effect, and only screenshots and input blame the window (#1673); a board keeps earlier votes' results, listed newest first in Results and deleted one at a time; the object a stamp will stick to is outlined while the stamp tool is over it or a stamp is dragged over it, and board objects take no drops (gap 24); a server can list the files shared from it now for everyone who reaches it, Home ▸ Online shows them and their links carry no secret (`team_files`, part of #742); team library analytics count detached instances per component and file (gap 10); skipping the Open link notice by command is saved with the preferences at once (gap 15); a selected connector's bar on a board sets its start and end points, solid or dashed, its weight and any colour (#1596); cells copied from a spreadsheet paste onto a board as a table; a long layer name stays on one line in the Export button and the Dev Mode header, ending with an ellipsis, and no longer covers the Design panel (#1650); with hundreds of layers selected, the Design panel and the selection overlays stop going over the whole selection on every frame, so dragging 648 layers averages about 1.1 ms of UI per frame (#1571); plugin panels show pictures: an `image` control, base64 within 256 KB and 4,096 px a side, named by its label (gap 6); `.fig` connector labels without a saved snapshot are kept, centred on their line (gap 1); a drag moving many layers re-runs only what sits around them, not each layer's bindings, sizing, text and instance checks, on every move (#1571); damaged font tracking table offsets are checked instead of wrapping on 32-bit targets, and font indexing makes its existing offset bounds explicit (#1125); Bosnian (`bs`) draft catalog; text style dedupe is O(spans) via a last-two cache aLine truncated
FigCraft is a clean-room, open-source, pure-Rust reimplementation of the Figma design workflow,
native on macOS, Windows, Linux and FreeBSD and in the browser, fully drivable by agents through
@@ -358,6 +358,7 @@ Ranked; detail and milestones in [`docs/roadmap.md`](docs/roadmap.md).
| Date | Change | Summary |
|---|---|---|
| 2026-11-02 | minor | M3, #1885: glass's light is a line on its 1-unit bevel added to the backdrop, as the reference tool's: fully where the edge faces the light, none below 0.35 of facing it and 0.6 as much on the opposite side, with a faint gradient across the curve, 5% darker facing the light and lighter opposite (it was a glow mixed towards white, as deep as `splay` made it). `splay` turns the bend from along the edge's normal towards the way away from the layer's centre, as the reference tool's does, and no longer widens the light: files with a splay above 0 look different. The direction to the centre is worked out in the shape's own frame, so cut renders match. Tests: `glass::tests::the_light_lies_on_the_bevel_and_the_gradient_across_the_curve`, `backdrop_tests::splay_turns_the_bend_towards_the_centre`, `glass_cut_tests::the_light_is_a_line_on_the_bevel`. Numbers unchanged |
| 2026-11-02 | minor | M3, #1885: glass bends the backdrop with the reference tool's thick-lens profile: most a 1-unit bevel in from the edge, falling off as the 3.5th power of the way out of the curve to nothing `depth` further in, and a fifth as much on the bevel itself (it fell off as the square of the way in from the very edge). Dispersion splits the channels over 8 steps with a triangular window, red moving furthest and blue least, as far apart as the reference tool's (at 100% red and blue move 0.16 of the bend apart; it was three samples, blue furthest), and `Glass::max_bend` bounds red's furthest step, so the backdrop read around a pane covers every sample. Tests: `glass::tests::the_bend_follows_the_thick_lens_profile`, `glass::tests::dispersion_splits_the_channels_along_the_bend`. Numbers unchanged |
| 2026-11-02 | minor | M3, #1885: glass effects take variables (light angle, intensity, refraction, depth, dispersion, frost and splay, on layers and in effect styles, and from the Design panel's glass fields), and a glass's frost stays within 0–100, the reference tool's range: a larger frost from an older file draws at 100, and the field, a bound variable and scaling stop there. Numbers unchanged |
| 2026-10-31 | minor | M12: as the help describes, holding Cmd/Ctrl while moving a connector's end places it on any part of an object instead of snapping to a side. It keeps that spot as a fraction of the object's box, so it follows the object when it moves or resizes, and without the key an end snaps as before. `board.connector {fromAt, toAt}` and `board.reattach {at}` take it; saved only when set. Numbers unchanged |
crates/doc/src/props.rs
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@@ -662,7 +662,8 @@ pub struct Glass {
pub dispersion: f64,
/// Blur of the backdrop (a blur radius, document units, 0–[`Self::MAX_FROST`]).
pub frost: f64,
/// How widely the light spreads over the glass (0–1).
/// Which way the curved edge bends the backdrop: along the edge's normal (0) to away from the
/// layer's centre (1).
pub splay: f64,
}
crates/render/src/backdrop_tests.rs
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@@ -254,16 +254,65 @@ fn glass_edges_bend_split_and_catch_the_light() {
let (rim, middle) = changed(&split, &bent);
assert!(rim > 0 && middle == 0, "dispersion: rim {rim}, middle {middle}");
// The light (from the top left by default) brightens the top-left rim more than the
// bottom-right one, and only near the edge.
// The light (from the top left by default) is a line on the 1-unit bevel: the top-left corner
// catches it all, the bottom-right one (facing away) 0.6 as much, the top side (45° from it)
// 0.574 and the bottom side 0.6 × 0.574, and the top-right corner (side on) none. Further in
// only the faint gradient across the curve shows, and nothing past `depth`.
let (d, f, _) = glass_scene(Glass { light_intensity: 1.0, ..plain });
let lit = render_node(&d, f, 1.0).unwrap();
let gain = |x: u32, y: u32| i32::from(px(&lit, x, y)[1]) - i32::from(px(&flat, x, y)[1]);
assert!(gain(82, 42) > gain(197, 117), "{} vs {}", gain(82, 42), gain(197, 117));
assert!(gain(82, 42) > 40, "{}", gain(82, 42));
let (top_left, bottom_right, top, bottom, top_right) = (gain(80, 40), gain(199, 119), gain(140, 40), gain(140, 119), gain(199, 40));
assert!(
top_left > bottom_right && bottom_right > top && top > bottom && bottom > top_right.abs(),
"{top_left} {bottom_right} {top} {bottom} {top_right}"
);
assert!(top_left > 120 && top_right.abs() <= 2, "{top_left} {top_right}");
assert!(gain(140, 44).abs() <= 13, "4 px in: the gradient only, {}", gain(140, 44));
assert_eq!(gain(140, 80), 0);
}
#[test]
fn splay_turns_the_bend_towards_the_centre() {
// Refraction only, so the bend alone moves the stripes' edges.
let bend = Glass { frost: 0.0, refraction: 1.0, dispersion: 0.0, light_intensity: 0.0, depth: 16.0, ..Glass::default() };
let (d, f, _) = glass_scene(bend.clone());
let edge = render_node(&d, f, 1.0).unwrap();
let (d, f, _) = glass_scene(Glass { splay: 1.0, ..bend });
let centre = render_node(&d, f, 1.0).unwrap();
let diff = |xs: std::ops::Range<u32>, ys: std::ops::Range<u32>| {
let mut most = 0;
for y in ys {
for x in xs.clone() {
most = most.max(px(&edge, x, y).iter().zip(px(&centre, x, y)).map(|(a, b)| a.abs_diff(b)).max().unwrap());
}
}
most
};
// Halfway along the left side the edge's normal and the way from the centre (140, 80) agree:
// nearly the same pixels. In the top-left corner they part, and so does what shows there.
assert!(diff(80..96, 78..82) <= 8, "mid-left: {}", diff(80..96, 78..82));
assert!(diff(80..96, 40..56) > 40, "corner: {}", diff(80..96, 40..56));
}
/// Glass with nothing under it (an export of the pane alone): the light on the bevel still shows,
/// the alpha rising with it, and the flat inside and the outside stay clear.
#[test]
fn glass_over_nothing_still_catches_the_light() {
let mut d = Document::new("glass");
let p = d.first_page().unwrap();
let pane = d.create(p, NodeKind::Rectangle, "Glass", 40.0, 30.0, 120.0, 80.0).unwrap();
let n = d.get_mut(pane).unwrap();
n.fills.clear();
n.effects = vec![Effect { kind: EffectKind::Glass(Glass { light_intensity: 1.0, ..Glass::default() }), visible: true }];
let out = render_area(&d, &[pane], Rect::new(0.0, 0.0, 200.0, 140.0), 1.0).unwrap();
// The top-left corner faces the light (from the top left): white, as opaque as it is bright.
let corner = px(&out, 40, 30);
assert!(corner[3] > 100 && corner.iter().all(|v| v.abs_diff(corner[3]) <= 2), "{corner:?}");
assert!(out.data().chunks_exact(4).all(|q| q[0] <= q[3] && q[1] <= q[3] && q[2] <= q[3]), "premultiplied");
assert_eq!(px(&out, 100, 70), [0; 4]);
assert_eq!(px(&out, 10, 10), [0; 4]);
}
#[test]
fn glass_and_backdrop_blur_survive_bands_and_partial_renders() {
let (d, _, _) = glass_scene(Glass::default());
crates/render/src/glass.rs
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@@ -3,10 +3,12 @@
//! Within `depth` of the outline the surface curves like a thick lens: the backdrop there is bent
//! towards the inside, most a [`BEVEL`] in from the edge (`refraction` × `depth` far), falling off
//! as the 3.5th power of the way out of the curve and gone `depth` further in, with a fifth as
//! much on the bevel itself ([`bend_at`]). Each colour channel bends by a different amount
//! (`dispersion`, a rainbow fringe: red furthest, blue least, each smeared along the bend), and the
//! rim catches the light: brightest where it faces `light_angle`, half as bright on the opposite
//! side, spread wider by `splay`.
//! much on the bevel itself ([`bend_at`]). `splay` turns which way it bends, from along the edge's
//! normal (0) to away from the layer's centre (1). Each colour channel bends by a different amount
//! (`dispersion`, a rainbow fringe: red furthest, blue least, each smeared along the bend). The
//! bevel catches the light as a thin line added to the backdrop ([`rim_light_at`]): fully where the
//! edge faces `light_angle`, none below 0.35 of facing it, 0.6 as much on the opposite side; and a
//! faint gradient runs across the curve, 5% darker where it faces the light and lighter opposite.
//! `frost` blurs the backdrop first. Distances to the outline come from an exact Euclidean
//! distance transform of the shape's coverage.
//!
@@ -181,11 +183,45 @@ const RIM_BEND: f32 = 0.2;
/// by a triangle (the two end steps weigh nothing and are skipped).
const DISPERSION_STEPS: usize = 8;
/// The least an edge faces the light (the cosine between its outward normal and the light) and
/// still catches some.
const HL_LO: f32 = 0.35;
/// How much of the light the side opposite it catches.
const HL_SECONDARY: f32 = 0.6;
/// The gradient across the curve at its strongest, a share of the light's intensity.
const BROAD: f32 = 0.05;
/// `x` from `a` to `b` as 0 to 1, clamped (a span under 1e-5 counts as 1e-5).
fn lin(a: f32, b: f32, x: f32) -> f32 {
((x - a) / (b - a).max(1e-5)).clamp(0.0, 1.0)
}
/// `x` from `a` to `b` as a smooth 0-to-1 step (Hermite), clamped.
fn smoothstep(a: f32, b: f32, x: f32) -> f32 {
let t = ((x - a) / (b - a).max(1e-5)).clamp(0.0, 1.0);
t * t * (3.0 - 2.0 * t)
}
/// How much of the rim light falls `x` pixels in from the edge, for a `bevel` pixels deep: all
/// of it within a fifth of the bevel, none a bevel in.
pub(crate) fn rim_light_at(x: f32, bevel: f32) -> f32 {
smoothstep(-bevel - 0.001, -0.2 * bevel, -x)
}
/// How much light an edge catches, `facing` being the cosine between its outward normal and the
/// light: from [`HL_LO`] to fully facing it, and [`HL_SECONDARY`] as much facing away.
fn catches(facing: f32) -> f32 {
smoothstep(HL_LO, 1.0, facing) + HL_SECONDARY * smoothstep(HL_LO, 1.0, -facing)
}
/// How strongly the gradient across the curve shows `x` pixels in from the edge (`depth` and
/// `bevel` in pixels): fully on the bevel, falling as the square of the way in to none at `depth`.
pub(crate) fn sheen_at(x: f32, depth: f32, bevel: f32) -> f32 {
lin(-depth, -bevel + 1e-4, -x).powi(2)
}
/// How far the backdrop moves at `x` pixels in from the edge, for a glass `depth` and [`BEVEL`]
/// `bevel` deep (pixels) and `refraction` (0–1): a thick lens's profile, the most a bevel in from
/// the edge, falling off as the 3.5th power of the way out of the curve to nothing `depth` further
@@ -229,6 +265,17 @@ fn dispersed(frosted: &Pixmap, x: f32, y: f32, dx: f32, dy: f32, k: f32) -> [f32
[(acc[0] / sum).min(a), (acc[1] / sum).min(a), (acc[2] / sum).min(a), a]
}
/// `base`, a premultiplied backdrop pixel (channels 0–255), with `add` (levels, below 0 darkens)
/// added to its colour, at coverage `c`. Where that is more than the backdrop's alpha holds (all of
/// it over a transparent backdrop, an export with nothing under the glass), the alpha rises with
/// it, so the light shows there too.
fn lit(base: [f32; 4], add: f32, c: f32) -> [u8; 4] {
let [r, g, b, a] = base;
let (r, g, b) = (r + add, g + add, b + add);
let a = a.max(0.0).max(r).max(g).max(b).min(255.0);
[r, g, b, a].map(|v| (v.clamp(0.0, a) * c).round().clamp(0.0, 255.0) as u8)
}
/// Bilinear sample of premultiplied `p` at pixel coordinates `(x, y)` (centres at +0.5), each
/// channel 0..=255; transparent outside.
fn sample(p: &Pixmap, x: f32, y: f32) -> [f32; 4] {
@@ -256,17 +303,6 @@ fn sample(p: &Pixmap, x: f32, y: f32) -> [f32; 4] {
})
}
/// The furthest in (pixels) the rim light is worth half a level or more: where
/// `255 × intensity × e^(−d / band)` falls to 0.5, at most [`MAX_LIGHT_PX`] (0 for no light).
fn light_reach(band: f64, intensity: f64) -> f64 {
let k = 255.0 * intensity / 0.5;
if k > 1.0 && band.is_finite() { (band * k.ln()).min(MAX_LIGHT_PX) } else { 0.0 }
}
/// The light reaches no further in than this many pixels (a wide light on a deep pane at a high
/// zoom would otherwise need a huge margin of coverage around every cut).
const MAX_LIGHT_PX: f64 = 512.0;
/// A shape's coverage (alpha), distance to its edge and smoothed inward normals over a window of
/// pixels whose top-left pixel is (`x0`, `y0`).
struct Fields {
@@ -420,9 +456,19 @@ fn shape_fields(shape: &Outline, xf: Affine, w: u32, h: u32, m: u32, r: usize) -
Some((Arc::new(Fields::new(&cov, -i64::from(m), -i64::from(m), r)), (0, 0)))
}
/// [`shape_fields`] for a whole shape, from the cache; `None` when it isn't kept (first asked for
/// in this render, too big, or its transform too far out).
fn whole_shape(shape: &Outline, xf: Affine, m: u32, r: usize) -> Option<(Arc<Fields>, (i64, i64))> {
/// A layer transform split so the same shape at the same zoom lands on the same pixels of its own
/// frame wherever a render puts it or cuts it (see [`own_frame`]).
struct OwnFrame {
/// The whole pixels of the translation: the shift from layer pixels to the shape's own frame.
shift: (i64, i64),
/// The translation's fraction of a pixel, in steps of 1/65536.
frac: (i64, i64),
/// Local coordinates → the shape's own frame: the linear part and that fraction.
xf: Affine,
}
/// `xf` (local → layer pixels) split into its [`OwnFrame`]; `None` for a translation too far out.
fn own_frame(xf: Affine) -> Option<OwnFrame> {
let [a, b, c, d, e, f] = xf.as_coeffs();
// The translation in steps of 1/65536 px (far finer than the rasteriser's 1/64, coarse enough
// that rounding errors in where a render starts land on the same step), its whole pixels (the
@@ -435,7 +481,14 @@ fn whole_shape(shape: &Outline, xf: Affine, m: u32, r: usize) -> Option<(Arc<Fie
let (qe, qf) = (q(e)?, q(f)?);
let shift = (qe.div_euclid(STEPS as i64), qf.div_euclid(STEPS as i64));
let frac = (qe.rem_euclid(STEPS as i64), qf.rem_euclid(STEPS as i64));
let own = Affine::new([a, b, c, d, frac.0 as f64 / STEPS, frac.1 as f64 / STEPS]);
Some(OwnFrame { shift, frac, xf: Affine::new([a, b, c, d, frac.0 as f64 / STEPS, frac.1 as f64 / STEPS]) })
}
/// [`shape_fields`] for a whole shape, from the cache; `None` when it isn't kept (first asked for
/// in this render, too big, or its transform too far out).
fn whole_shape(shape: &Outline, xf: Affine, m: u32, r: usize) -> Option<(Arc<Fields>, (i64, i64))> {
let [a, b, c, d, _, _] = xf.as_coeffs();
let OwnFrame { shift, frac, xf: own } = own_frame(xf)?;
let bb = (own * shape.0.clone()).bounding_box();
let (x0, y0, x1, y1) = (bb.x0.floor(), bb.y0.floor(), bb.x1.ceil(), bb.y1.ceil());
if ![x0, y0, x1, y1].iter().all(|v| v.is_finite() && v.abs() < 1e9) {
@@ -479,27 +532,25 @@ pub fn glass(g: &Glass, frame: EffectFrame<'_>) -> Option<Pixmap> {
let g = g.sanitized();
let depth = (g.depth * scale).clamp(1.0, 1024.0);
let bevel = (BEVEL * scale).min(1024.0);
let band = (depth * (0.15 + 0.35 * g.splay)).max(1.0);
let reach = light_reach(band, g.light_intensity);
let r = (depth * 0.1).clamp(1.0, 8.0) as usize;
// Coverage with a margin, so wherever the layer is cut every distance the pixels read is
// exact: the bend's (within `depth` + `bevel`), the light's (within `reach`) and those the
// normals are smoothed from (2r + 1 further).
let m = (depth + bevel).max(reach).ceil() as u32 + 4 * r as u32 + 4;
// exact: the bend's and the gradient's (within `depth` + `bevel`; the light lies on the bevel)
// and those the normals are smoothed from (2r + 1 further).
let m = (depth + bevel).ceil() as u32 + 4 * r as u32 + 4;
let (fields, shift) = shape_fields(shape, xf, w, h, m, r)?;
let mut frosted = back.clone();
fx::blur(&mut frosted, g.frost / 2.0 * scale);
let ang = g.light_angle.to_radians();
let light = (ang.sin() as f32, -ang.cos() as f32);
// The layer's centre in its own frame (see `own_frame`), which `splay` bends away from: the
// direction to it is the same wherever a render puts or cuts the layer.
let local_centre = shape.0.bounding_box().center();
let ((sx, sy), centre) = match own_frame(xf) {
Some(own) => (own.shift, own.xf * local_centre),
None => ((0, 0), xf * local_centre),
};
let (refraction, dispersion, bevel) = (g.refraction as f32, (g.dispersion * Glass::DISPERSION_SPREAD) as f32, bevel as f32);
let power = (6.0 - 5.0 * g.splay) as f32;
let (band, reach) = (band as f32, reach as f32);
// The falloff, lowered by its value at `reach` and scaled back to 1 at the edge, so the light
// fades out to 0 at `reach` instead of stopping there.
let floor = (-reach / band).exp();
let fall = 1.0 - floor;
let intensity = g.light_intensity as f32;
let depth = depth as f32;
let (splay, intensity, depth) = (g.splay as f32, g.light_intensity as f32, depth as f32);
let mut out = Pixmap::new(w, h)?;
let dst = out.data_mut();
for y in 0..h as usize {
@@ -508,30 +559,37 @@ pub fn glass(g: &Glass, frame: EffectFrame<'_>) -> Option<Pixmap> {
if c <= 0.0 {
continue;
}
let bend = bend_at(d, depth, bevel, refraction);
let (bx, by) = (x as f32 + pad as f32 + 0.5, y as f32 + pad as f32 + 0.5);
let base = if bend == 0.0 {
// Nothing bends (past `depth` + `bevel`, or no refraction): the channels' samples
// are at the same point, so one sample.
let s = sample(&frosted, bx, by);
[s[0].min(s[3]), s[1].min(s[3]), s[2].min(s[3]), s[3]]
let (base, add) = if d >= depth + bevel {
// Past the curve nothing bends and no light falls (the rim light and the gradient
// are 0 there): the channels' samples are at the same point, so one sample.
(dispersed(&frosted, bx, by, 0.0, 0.0, 0.0), 0.0)
} else {
dispersed(&frosted, bx, by, inward.0 * bend, inward.1 * bend, dispersion)
};
// The rim catches the light where it faces it, and half as much opposite. It fades out
// by `reach` and is none past it, wherever the layer is cut.
let hl = if d < reach && fall > 0.0 {
// The curve's outward direction: the edge's normal, turned by `splay` towards the
// way away from the centre (not renormalised: where the two part, the bend is less).
let away = if splay > 0.0 {
let px = ((x as i64 - sx) as f64 + 0.5 - centre.x) as f32;
let py = ((y as i64 - sy) as f64 + 0.5 - centre.y) as f32;
let len = (px * px + py * py).sqrt();
if len > 1e-6 { (px / len, py / len) } else { (0.0, 0.0) }
} else {
(0.0, 0.0)
};
let out_dir = (-inward.0 * (1.0 - splay) + away.0 * splay, -inward.1 * (1.0 - splay) + away.1 * splay);
// No refraction: nothing bends, so one sample (`dispersed` with no move).
let bend = bend_at(d, depth, bevel, refraction);
let k = if bend == 0.0 { 0.0 } else { dispersion };
let base = dispersed(&frosted, bx, by, -out_dir.0 * bend, -out_dir.1 * bend, k);
// The bevel catches the light as a line added to the backdrop, by how much the edge
// faces it; across the curve a faint gradient, darker on the side facing it.
let facing = -(inward.0 * light.0 + inward.1 * light.1);
let spec = facing.max(0.0).powf(power) + 0.5 * (-facing).max(0.0).powf(power);
(intensity * spec * ((-d / band).exp() - floor) / fall).clamp(0.0, 1.0)
} else {
0.0
let rim = rim_light_at(d, bevel) * catches(facing);
let sheen = -(out_dir.0 * light.0 + out_dir.1 * light.1) * sheen_at(d, depth, bevel) * BROAD;
(base, 255.0 * intensity * (rim + sheen))
};
let i = (y * w as usize + x) * 4;
if let Some(p) = dst.get_mut(i..i + 4) {
for (o, v) in p.iter_mut().zip(base) {
*o = ((v * (1.0 - hl) + 255.0 * hl) * c).round().clamp(0.0, 255.0) as u8;
}
p.copy_from_slice(&lit(base, add, c));
}
}
}
@@ -673,14 +731,32 @@ mod tests {
assert!(c.held <= 100 && !c.map.contains_key(&key(4)));
}
/// The rim light and the gradient across the curve at depth 20 and a 1-unit bevel, x units in
/// from the edge: the reference profile's values.
#[test]
fn light_reach_is_where_the_light_falls_under_half_a_level() {
let r = light_reach(10.0, 1.0);
assert!((255.0 * (-r / 10.0).exp() - 0.5).abs() < 1e-9, "{r}");
// No light, too faint to show, or a band that isn't a number: it reaches nowhere.
for (band, intensity) in [(10.0, 0.0), (10.0, 0.5 / 255.0), (f64::NAN, 1.0), (f64::INFINITY, 1.0)] {
assert_eq!(light_reach(band, intensity), 0.0, "{band} {intensity}");
fn the_light_lies_on_the_bevel_and_the_gradient_across_the_curve() {
for (x, rim, sheen) in [
(0.10, 1.0, 1.0),
(0.25, 0.9888, 1.0),
(0.50, 0.6843, 1.0),
(0.75, 0.2330, 1.0),
(1.00, 0.0, 1.0),
(2.0, 0.0, 0.8975),
(4.0, 0.0, 0.7091),
(6.0, 0.0, 0.5429),
(8.0, 0.0, 0.3989),
(16.0, 0.0, 0.0443),
(20.0, 0.0, 0.0),
(30.0, 0.0, 0.0),
] {
assert!((rim_light_at(x, 1.0) - rim).abs() < 1e-3, "rim at {x}: {}", rim_light_at(x, 1.0));
assert!((sheen_at(x, 20.0, 1.0) - sheen).abs() < 1e-3, "gradient at {x}: {}", sheen_at(x, 20.0, 1.0));
}
assert_eq!(light_reach(1e6, 1.0), MAX_LIGHT_PX);
// Facing the light fully, at 45° (cos 0.707) and side on; the opposite side 0.6 as much.
assert!((catches(1.0) - 1.0).abs() < 1e-6);
assert!((catches(std::f32::consts::FRAC_1_SQRT_2) - 0.574).abs() < 1e-3, "{}", catches(std::f32::consts::FRAC_1_SQRT_2));
assert_eq!(catches(0.0), 0.0);
assert!((catches(-1.0) - 0.6).abs() < 1e-6);
assert!((catches(-std::f32::consts::FRAC_1_SQRT_2) - 0.6 * 0.574).abs() < 1e-3);
}
}
crates/render/src/glass_cut_tests.rs
+17 -9
View File
@@ -59,25 +59,31 @@ fn cut_diffs(d: &Document, p: NodeId) -> Vec<(u32, (u8, usize))> {
.collect()
}
/// A pane deeper than the light may reach, over black and lit from the left: across its middle row
/// each pixel is the light alone. It fades out smoothly where it stops, with no ring.
/// A deep pane over black, lit from the left, at 2× (its 1-unit bevel 2 px wide): across its middle
/// row the left rim catches the light, the right rim 0.6 as much, and in between only the faint
/// gradient across the curve shows (black can't darken, so the lit half stays black), changing
/// smoothly, with no ring.
#[test]
fn the_light_fades_out_where_it_stops() {
fn the_light_is_a_line_on_the_bevel() {
let mut d = Document::new("glass");
let p = d.first_page().unwrap();
let back = d.create(p, NodeKind::Rectangle, "Back", 0.0, 0.0, 700.0, 700.0).unwrap();
d.get_mut(back).unwrap().fills = vec![Paint::solid(Color::BLACK)];
let pane = d.create(p, NodeKind::Rectangle, "Glass", 50.0, 50.0, 600.0, 600.0).unwrap();
let g = Glass { depth: 300.0, splay: 1.0, light_angle: -90.0, light_intensity: 1.0, frost: 0.0, refraction: 0.0, ..Glass::default() };
let g = Glass { depth: 300.0, light_angle: -90.0, light_intensity: 1.0, frost: 0.0, refraction: 0.0, ..Glass::default() };
let n = d.get_mut(pane).unwrap();
n.fills.clear();
n.effects = vec![Effect { kind: EffectKind::Glass(g), visible: true }];
let full = render_view_single(&d, p, &View { origin: (0.0, 0.0), scale: 2.0, width: 1400, height: 1400 }, &Options::default()).unwrap();
let row = &full.data()[700 * 1400 * 4..][..1400 * 4];
let red: Vec<u8> = row.chunks(4).map(|px| px[0]).skip(101).take(598).collect();
let step = red.windows(2).map(|w| w[0].abs_diff(w[1])).max().unwrap();
assert!(step <= 2, "the light jumps {step} levels between neighbouring pixels");
assert!(red[0] > 200 && red[597] < red[0], "lit at the edge, fading in: {} … {}", red[0], red[597]);
let red: Vec<u8> = row.chunks(4).map(|px| px[0]).collect();
// The pane covers pixels 100..1300 of the row.
let (left, right) = (red[100], red[1299]);
assert!(left > 230, "the left rim catches the light, less the gradient: {left}");
assert!((140..=175).contains(&right), "the right rim 0.6 as much, plus the gradient: {right}");
assert!(red[106] <= 14 && red[1293] <= 14, "3 units in, the gradient only: {} {}", red[106], red[1293]);
let step = red[104..1296].windows(2).map(|w| w[0].abs_diff(w[1])).max().unwrap();
assert!(step <= 2, "the gradient jumps {step} levels between neighbouring pixels");
}
/// Digests of glass renders over a spread of settings, scales and corners: compare two builds'
@@ -115,11 +121,13 @@ fn glass_digests() {
#[test]
fn a_cut_through_the_pane_matches_the_whole_render() {
// The last look is deep enough that the light is held to `MAX_LIGHT_PX`.
// The last look is deep (300 units), so the curve reaches far in from every cut.
let looks = [
wide_light(),
Glass::default(),
Glass { splay: 0.5, frost: 0.0, refraction: 0.0, ..Glass::default() },
// Splay with the bend and dispersion on: the dispersed samples follow the turned bend.
Glass { splay: 1.0, frost: 0.0, ..Glass::default() },
Glass { depth: 300.0, ..wide_light() },
];
// Rounded corners without the pane's fill: a fill's curved edge rasters 1–2 levels apart in a
docs/target-app-parity.md
+2 -1
View File
@@ -1,6 +1,6 @@
# FigCraft parity with Figma
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-02 · **Change:** minor (glass bends with a thick-lens profile and splits its colours over 8 steps, measured against the reference tool; bulleted lists use the same bullet at every level of indentation, as the help center says, instead of a white bullet and a square at the deeper levels; typing `1)` and a space at the start of a paragraph starts a numbered list, as `1.` does, both being the help center's creation characters; a link on text is underlined by default, as the help center says, and Underline takes the underline off while the link stays; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; gap 6: widgets draw lines and SVG pictures (plugin API 6); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the browser build uses the fonts installed on the computer once asked, each read when text uses it (#1051); plugin widgets have hover styles: a layer's `hover` fill, stroke, opacity or text colour shows while the pointer is over it (gap 6); Thai, Lao, Khmer and Burmese lines break between words (#1219); MCP and control calls name their document (#998); shadows of images with transparent pixels follow their alpha (#1289); Arabic draft catalog; truncated text fills its last line before the ellipsis and keeps truncating when resized; auto-height text with max lines (#1375, #1376, #1377), numbers unchanged; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; `.sketch` import, best effort: import/export breadth 86% → 87%, file formats 60% → 61%, headline numbers unchanged; Canvas & navigation's remaining work no longer lists outline mode's Include hidden layers and Include object bounds; boards: area 22 (weight 0, outside the weighted sum); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, iteration marks 〱–〵 and the halfwidth parentheses; Turkish reviewed, Czech and Indonesian drafts, the Japanese draft completed; reviewed Russian catalog and integer plurals; vector edit mode regions: hover hatch, selection and drag; plugin log byte/count limits (#191); core editor leftovers: component playground, auto gap handles, variables inside styles, inner shadows and background blur on groups, command-made text readable on dark pages, a one-step frame/group convert, delays on mouse triggers and manual overlay offsets, wrapped-line alignment; starter templates, a Templates tab and Getting started tips on the home screen: essentials ~57% → ~59%; everyday editing partials: number fields, outline options, Hide when publishing, cursors, panel widths, dark pages, numbers unchanged but menu breadth 211/211; text box sizes measured against documents re-saved by other software: whole-pixel line heights, advances on a 1024-per-em grid, letter spacing between glyphs only, numbers unchanged; .fig export checked by opening written files in other software, numbers unchanged; a public figcraft-server: open hosting, owner tokens, per-address limits, idle expiry, moderation, install.sh; experimental .fig export; keyboard shortcut parity suite and bindings; Simplified Chinese draft catalog; Latin American Spanish overlay; prototyping tail: gamepad triggers, widgets in prototypes, mode lookups; plugin directory on figcraft-server; Japanese and Korean draft catalogs and CJK UI fonts; plugin widgets and the plugin panel tail; French, German and Brazilian Portuguese draft catalogs; cursor chat and spotlight in live sessions; layers and assets panels behaviour suite and fixes; vector multi-edit and edit tail; dev resources links; extended collections tail; branch version history and finer list merges; headline percentages recomputed from the area table: feature breadth ~84%, core ~94%, mainstream ~50%; text lists, hanging punctuation and decoration styles; comments and version history behaviour suite and fixes; canvas navigation, guides and grids behaviour suite and fixes; export and inspect behaviour suite and fixes; .fig import: editable vector networks and more layer kinds; shapes and vector behaviour suite and fixes; paint and effects behaviour suite and fixes; frames, groups, sections and masks behaviour suite and fixes; styles and variables behaviour suite and fixes; prototyping behaviour suite and fixes; components behaviour suite and fixes; embedded image colour profiles; layers panel keyboard: F2 rename, Shift+F10 context menu, keyboard box selection, 10k-layer QA; per-side stroke weight variables; text behaviour suite: CJK line breaking, metrics, vertical trim; selection and transform behaviour suite and fixes; `.fig` import, best effort; auto layout behaviour suite and fixes; Display P3: gamut warning and Line truncated
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-02 · **Change:** minor (glass's light is a line on its bevel and splay turns the bend towards the centre; glass bends with a thick-lens profile and splits its colours over 8 steps, measured against the reference tool; bulleted lists use the same bullet at every level of indentation, as the help center says, instead of a white bullet and a square at the deeper levels; typing `1)` and a space at the start of a paragraph starts a numbered list, as `1.` does, both being the help center's creation characters; a link on text is underlined by default, as the help center says, and Underline takes the underline off while the link stays; a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; gap 6: widgets draw lines and SVG pictures (plugin API 6); gap 6: a widget opens its plugin's panel (plugin API 5), whose callbacks redraw it; the browser build uses the fonts installed on the computer once asked, each read when text uses it (#1051); plugin widgets have hover styles: a layer's `hover` fill, stroke, opacity or text colour shows while the pointer is over it (gap 6); Thai, Lao, Khmer and Burmese lines break between words (#1219); MCP and control calls name their document (#998); shadows of images with transparent pixels follow their alpha (#1289); Arabic draft catalog; truncated text fills its last line before the ellipsis and keeps truncating when resized; auto-height text with max lines (#1375, #1376, #1377), numbers unchanged; plugin widgets take text input and a property menu (plugin API 4); boards: templates and tables; boards: a shared timer and voting sessions; boards: the dot grid, connector ends dragged to re-attach, curved connectors; `.sketch` import, best effort: import/export breadth 86% → 87%, file formats 60% → 61%, headline numbers unchanged; Canvas & navigation's remaining work no longer lists outline mode's Include hidden layers and Include object bounds; boards: area 22 (weight 0, outside the weighted sum); CJK line breaking: JIS X 4051's line-start and line-end sets completed with the halfwidth small kana, the halfwidth and spacing (semi-)voiced sound marks, iteration marks 〱–〵 and the halfwidth parentheses; Turkish reviewed, Czech and Indonesian drafts, the Japanese draft completed; reviewed Russian catalog and integer plurals; vector edit mode regions: hover hatch, selection and drag; plugin log byte/count limits (#191); core editor leftovers: component playground, auto gap handles, variables inside styles, inner shadows and background blur on groups, command-made text readable on dark pages, a one-step frame/group convert, delays on mouse triggers and manual overlay offsets, wrapped-line alignment; starter templates, a Templates tab and Getting started tips on the home screen: essentials ~57% → ~59%; everyday editing partials: number fields, outline options, Hide when publishing, cursors, panel widths, dark pages, numbers unchanged but menu breadth 211/211; text box sizes measured against documents re-saved by other software: whole-pixel line heights, advances on a 1024-per-em grid, letter spacing between glyphs only, numbers unchanged; .fig export checked by opening written files in other software, numbers unchanged; a public figcraft-server: open hosting, owner tokens, per-address limits, idle expiry, moderation, install.sh; experimental .fig export; keyboard shortcut parity suite and bindings; Simplified Chinese draft catalog; Latin American Spanish overlay; prototyping tail: gamepad triggers, widgets in prototypes, mode lookups; plugin directory on figcraft-server; Japanese and Korean draft catalogs and CJK UI fonts; plugin widgets and the plugin panel tail; French, German and Brazilian Portuguese draft catalogs; cursor chat and spotlight in live sessions; layers and assets panels behaviour suite and fixes; vector multi-edit and edit tail; dev resources links; extended collections tail; branch version history and finer list merges; headline percentages recomputed from the area table: feature breadth ~84%, core ~94%, mainstream ~50%; text lists, hanging punctuation and decoration styles; comments and version history behaviour suite and fixes; canvas navigation, guides and grids behaviour suite and fixes; export and inspect behaviour suite and fixes; .fig import: editable vector networks and more layer kinds; shapes and vector behaviour suite and fixes; paint and effects behaviour suite and fixes; frames, groups, sections and masks behaviour suite and fixes; styles and variables behaviour suite and fixes; prototyping behaviour suite and fixes; components behaviour suite and fixes; embedded image colour profiles; layers panel keyboard: F2 rename, Shift+F10 context menu, keyboard box selection, 10k-layer QA; per-side stroke weight variables; text behaviour suite: CJK line breaking, metrics, vertical trim; selection and transform behaviour suite and fixes; `.fig` import, Line truncated
The authoritative assessment of how close FigCraft is to Figma Design. [`ROADMAP.md`](../ROADMAP.md)
summarizes it; [`gaps.md`](gaps.md) is the ranked work list; the measured menu checklist is
@@ -648,6 +648,7 @@ Carried over from the ROADMAP's "Shipped so far" (2026-10-10). The test count th
| Date | Change | Summary |
|---|---|---|
| 2026-11-02 | minor | M3, #1885: glass's light is a line on its 1-unit bevel added to the backdrop, as the reference tool's: fully where the edge faces the light, none below 0.35 of facing it, 0.6 as much on the opposite side, with a faint gradient across the curve. `splay` turns the bend from along the edge's normal towards the way away from the layer's centre and no longer widens the light, as in the reference tool. Checked side by side on synthetic files: a splay of 1 bends the backdrop towards the centre in both. Tests: `glass::tests::the_light_lies_on_the_bevel_and_the_gradient_across_the_curve`, `backdrop_tests::splay_turns_the_bend_towards_the_centre`, `glass_cut_tests::the_light_is_a_line_on_the_bevel`. Grade unchanged. |
| 2026-11-02 | minor | M3, #1885: glass bends the backdrop with the reference tool's thick-lens profile (most a 1-unit bevel in from the edge, falling off as the 3.5th power of the way out of the curve to nothing `depth` further in) and splits its colours over 8 steps, red and blue 0.16 of the bend apart at 100% dispersion. Measured against the reference tool on synthetic files at 2×: the black band a pane pulls to its edge ends within 3 px of the reference tool's, and red and blue part 2.27 px at 50% dispersion and 4.66 px at 100% (2.38 and 4.69 there). Tests: `glass::tests::the_bend_follows_the_thick_lens_profile`, `glass::tests::dispersion_splits_the_channels_along_the_bend`. Grade unchanged. |
| 2026-11-01 | patch | M4: bulleted lists draw the same bullet at every level of indentation ("Figma bullets will keep the same styling at all levels of indentation", Create bulleted and numbered lists); the deeper levels drew a white bullet and a small square, pinned as silent before. Numbered levels (1., a., i.) are unchanged. Found by a documentation audit of the text rules. Test: `tail_tests::list_numbering_by_level` (the bullets row). Numbers unchanged |
| 2026-11-01 | patch | M4: typing `1)` followed by a space at the start of a plain paragraph starts a numbered list, as `1.` already did ("Enter one of the creation characters below followed by a Space: 1. 1)", Create bulleted and numbered lists). Found by a documentation audit of the text rules. Test: `text_tail_tests::typing_a_creation_character_and_a_space_starts_a_list`. Numbers unchanged |