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3D: solid-color fills and strokes under colored lights draw their faces in one depth order - #7280
#7154 draws the faces of an object's fill and strokes in one depth order, but not when a light that is not white shines on a fill or stroke in a solid color. In that case each such solid was drawn as one composite of all its facets, so the solids were drawn whole, one after another, and a stroke's faces covered every face of the fill, nearer or not. The help page says a light's Color option changes the color of the light (3D and Materials panel options). The CS3 user guide says that the Draw Hidden Faces option shows an object's hidden backfaces (PDF page 255) and that every 3D object is built from several surfaces (PDF page 257). It does not say how the faces of a fill and its strokes are ordered; the order below is VectorCraft's own rule.
surfaces_for (crates/effects/src/solids.rs) no longer keeps a solid-color surface under colored lights out of the shared order. When the object's solids are opaque with Normal blending, or when they are one group member's under its own opacity mask, each facet of such a solid is drawn on its own through lighting::facet_art, the path gradient paints already take, and goes in the order with the faces of the other solids. Each face keeps the composite's paint, red, green and blue light ramps and seam width.
A lone solid, and the solids of an object with a translucent or blended fill or stroke, are still drawn as one composite each, as before.
A face drawn on its own is about 16 nodes, against about 6 per facet in a composite. These faces go in one order while they number at most 30,720 together, counted again after the cuts (MAX_FACE_COMPOSITES, VectorCraft's own limit). Past that, each such solid is drawn as one composite, as on main. At 30,720 faces the per-face art holds about as many nodes as the composites do at the paint-copy allowance.
docs/three-d.md describes when a colored solid surface is batched, when its faces join the order and how their seams and corners are drawn then, and docs/target-app-parity.md has one line for it. No user-visible string or command changed.
This changes existing behavior: under colored lights, an opaque solid-color fill and stroke now draw their faces in depth order instead of the stroke's solid covering the fill's.
How it was tested
New tests, each failing without the change:
solids::tests::colored_solid_fills_and_strokes_share_face_depth_order (vectorcraft-effects): Inflate and Extrude & Bevel with a plain, dashed and width-profiled solid stroke, two views (one with perspective 40), two colored lights, and Inflate with a plain stroke in both views in a group member with an opacity mask. The art is one order with one face per facet, in the order of their depths; at most 5 sampled points (Inflate) and 0 (Extrude & Bevel) show a farther face on top. Drawing the two solids whole shows farther faces on top.
solids::tests::a_colored_solid_face_on_its_own_keeps_the_composites_colors: a facet drawn on its own has the same paint, channel ramps and seam width as in the surface's composite.
solids::tests::colored_solids_past_the_face_limit_draw_as_composites: a colored Inflate fill with strokes is one order under the limit, and each solid is one composite past it, including when only the pieces of the cuts carry the count past it.
three_d_light_color::colored_solid_inflate_faces_in_one_order_keep_the_composites_colors_and_seams (vectorcraft-engine, rendered): at 3x the fill's faces match the composite within 1 per channel with no seam; at 1x at most 300 of 10,000 pixels are off the 3x average and at most 500 let the background through; SVG export and Expand Appearance keep the colors.
Revised tests: colored_solid_inflate_batches_channels_and_clips_once_per_surface keeps one clip and one set of channel groups per surface for a lone fill and a translucent stroke, and expects one order of faces for an opaque fill and stroke. a_colored_inflate_in_gradients_draws_its_faces_in_one_order expects one order for the solid-color case too.
Focused checks on the final tree, on Linux. The branch is one commit on main at c9b2119552 and merges cleanly with it.
No panics in shipped code: no unwrap(), expect(), panic!, unreachable!, todo! or unimplemented! outside tests, and no unchecked indexing on data from files, parameters or
messages. Errors are returned as Result and shown to the user
(why and how).
Clean-room: nothing copied from Adobe products or GPL/AGPL code (AGENTS.md).
Every new asset has a row in ASSETS.md.
Summary by CodeRabbit
Improvements
Under colored lighting, eligible opaque, solid-color Inflate fills and strokes can share face-depth ordering with other solids, changing how overlapping faces are rendered.
Solids that do not meet the conditions for shared ordering continue to render as composites. This includes standalone solids, translucent or blended paint, and cases where the combined face count exceeds the rendering limit.
Documentation
Clarified how colored-light rendering, face ordering, and seam behavior differ between composite surfaces and depth-ordered faces.
…es in one depth order
Under a light that is not white, an opaque Inflate fill or stroke in a
solid color was drawn as one composite of all its facets, so the
object's solids were drawn whole, one after another: the stroke's faces
covered every face of the fill, nearer or not.
When an object's solids share one order (all opaque with Normal
blending, or one member's under its opacity mask), each facet of such a
solid is now drawn on its own, with the composite's paint, channel
light ramps and seam width, and takes its place in that order as the
faces of a gradient already do. A lone solid, and the solids of an
object with a translucent or blended fill or stroke, keep the one
composite.
A face drawn on its own is about 16 nodes, against about 6 per facet
in the composite of a whole surface. These faces go in one order while
they number at most 30,720 together, counted again after the cuts.
Past that, each such solid is drawn as one composite.
Docs: docs/three-d.md, docs/target-app-parity.md.
No actionable comments were generated in the recent review.
Walkthrough
Solid-color surfaces under colored light can share face-depth ordering when their combined facet count is at most 30,720. Otherwise, the renderer uses whole-surface composites. Tests and documentation cover the rendering conditions, clipping, and output.
Eligible surfaces can share face ordering when the combined facet count, including after stroke-face cuts, is at most 30,720. Other surfaces remain whole composites.
Rendering validation and documentation crates/effects/src/solids/tests.rs, crates/engine/tests/it/three_d_light_color.rs, docs/target-app-parity.md, docs/three-d.md
Tests cover ordering, batching, clipping, rendered output, and the facet-count limit. The documentation describes the rendering conditions and parity behavior.
Colored-light solid fills and strokes now share face-depth ordering up to 30,720 faces, and larger or translucent cases keep the previous composite rendering. No concrete merge-blocking risk was found, and tests and documentation cover the changed behavior.
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The title names the main change: solid-color fills and strokes under colored lights now draw their faces in one shared depth order. The summary, tests, and docs all cover this same change, so the title matches the changeset.
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Review comments at @docs/target-app-parity.md:
- Line 1218: Update the document’s status line and revision history to record
the parity evidence added in the colored-solid face-order entry, including the
relevant behavior and tests. Preserve the document’s existing tracking format
and ensure both records accurately reflect this change.
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What and why
#7154 draws the faces of an object's fill and strokes in one depth order, but not when a light that is not white shines on a fill or stroke in a solid color. In that case each such solid was drawn as one composite of all its facets, so the solids were drawn whole, one after another, and a stroke's faces covered every face of the fill, nearer or not. The help page says a light's Color option changes the color of the light (3D and Materials panel options). The CS3 user guide says that the Draw Hidden Faces option shows an object's hidden backfaces (PDF page 255) and that every 3D object is built from several surfaces (PDF page 257). It does not say how the faces of a fill and its strokes are ordered; the order below is VectorCraft's own rule.
surfaces_for(crates/effects/src/solids.rs) no longer keeps a solid-color surface under colored lights out of the shared order. When the object's solids are opaque with Normal blending, or when they are one group member's under its own opacity mask, each facet of such a solid is drawn on its own throughlighting::facet_art, the path gradient paints already take, and goes in the order with the faces of the other solids. Each face keeps the composite's paint, red, green and blue light ramps and seam width.MAX_FACE_COMPOSITES, VectorCraft's own limit). Past that, each such solid is drawn as one composite, as onmain. At 30,720 faces the per-face art holds about as many nodes as the composites do at the paint-copy allowance.docs/three-d.mddescribes when a colored solid surface is batched, when its faces join the order and how their seams and corners are drawn then, anddocs/target-app-parity.mdhas one line for it. No user-visible string or command changed.This changes existing behavior: under colored lights, an opaque solid-color fill and stroke now draw their faces in depth order instead of the stroke's solid covering the fill's.
How it was tested
New tests, each failing without the change:
solids::tests::colored_solid_fills_and_strokes_share_face_depth_order(vectorcraft-effects): Inflate and Extrude & Bevel with a plain, dashed and width-profiled solid stroke, two views (one with perspective 40), two colored lights, and Inflate with a plain stroke in both views in a group member with an opacity mask. The art is one order with one face per facet, in the order of their depths; at most 5 sampled points (Inflate) and 0 (Extrude & Bevel) show a farther face on top. Drawing the two solids whole shows farther faces on top.solids::tests::a_colored_solid_face_on_its_own_keeps_the_composites_colors: a facet drawn on its own has the same paint, channel ramps and seam width as in the surface's composite.solids::tests::colored_solids_past_the_face_limit_draw_as_composites: a colored Inflate fill with strokes is one order under the limit, and each solid is one composite past it, including when only the pieces of the cuts carry the count past it.three_d_light_color::colored_solid_inflate_faces_in_one_order_keep_the_composites_colors_and_seams(vectorcraft-engine, rendered): at 3x the fill's faces match the composite within 1 per channel with no seam; at 1x at most 300 of 10,000 pixels are off the 3x average and at most 500 let the background through; SVG export and Expand Appearance keep the colors.Revised tests:
colored_solid_inflate_batches_channels_and_clips_once_per_surfacekeeps one clip and one set of channel groups per surface for a lone fill and a translucent stroke, and expects one order of faces for an opaque fill and stroke.a_colored_inflate_in_gradients_draws_its_faces_in_one_orderexpects one order for the solid-color case too.Focused checks on the final tree, on Linux. The branch is one commit on
mainatc9b2119552and merges cleanly with it.cargo fmt --all -- --checkcargo check --workspace --testscargo clippy -p vectorcraft-effects -p vectorcraft-engine --all-targets -- -D warningscargo test -p vectorcraft-effects: 727 passed, 2 ignored (unit tests), 1 passed (envelope_ink)cargo test -p vectorcraft-engine --test it three_d_light_color: 11 passedcargo xtask brands,layersandassetscargo xtask ciruns in this pull request's CI.It conflicts with open #7032 in
docs/target-app-parity.md.Checklist
cargo xtask cipasses (fmt, clippy, tests, assets, brands, layers, wasm).unwrap(),expect(),panic!,unreachable!,todo!orunimplemented!outside tests, and no unchecked indexing on data from files, parameters ormessages. Errors are returned as
Resultand shown to the user(why and how).
ASSETS.md.Summary by CodeRabbit