mirror of
https://github.com/storytold/vectorcraft.git
synced 2026-11-08 23:35:07 +00:00
dotCooCoo
63dfcba8ba
A top-object envelope splits its outline into four sides at four corners and maps the content onto the Coons patch of those sides. The sides shared out the content by length, and the corners were the anchors or curve points nearest the bounding box corners. Each piece of a side between anchors and corners now takes a share of the content's width or height in proportion to the length of its control polygon, spread along the piece by its curve parameter. A straight segment spreads it evenly by length. A rounded rectangle stays close to the identity, and the content follows the curves of a side whose segments differ in size. Each corner is now the nearest anchor to its bounding box corner among the sharp anchors that point out of the outline and lie within 47.5% of the box's width and height from that corner. A handle shorter than 0.01 pt, or tangent unit vectors that differ by 0.01 or more in x or y, makes an anchor sharp, and the first one along the outline wins a tie. Without such an anchor, the corner is the outline's nearest point to the box corner, moved onto the end anchor of its segment within 0.5% of the segment's parameter. Envelopes opened from .ai files keep the corners the file saves. These are VectorCraft's own rules. Existing top-object envelopes redraw by them. Gradient meshes made from a path keep their sides measured by length. - crates/doc/src/live/mesh.rs: Coons::from_top_object and the corner search, used for top-object envelopes. - EnvelopeKind::TopObject gains an optional `corners` field (anchor indices); the .ai importer fills it from the mesh's corners. - Params text of object.envelope.makeWithTopObject, docs/mcp.md (Envelopes) and a progress line in docs/target-app-parity.md.