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M3.20: arrowheads: hollow outlines, tip/extend alignment, one opacity for line and head

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Hollow heads draw as rings (the open arrow as a chevron) and closed paths get
no heads. The stroke stops under each head, so it never shows through a hollow
head or past the tip; stroke.set {arrowAlign: "extend"|"tip"} chooses whether
the tip extends past the end point (default) or sits on it with the stroke
shortened. Line and heads share one paint box (a gradient runs on into the
head) and take the stroke and object opacity once, as one layer on the canvas
and one group in PDF. StrokeLayer.arrow_align is a new defaulted field, so
older files load unchanged. The Stroke panel's Align buttons get two generated
icons and are disabled when the stroke has no head.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
bflatastic
2026-10-04 17:20:40 +07:00
co-authored by Claude Opus 5.5
parent 23f19a861b
commit 5ae7bfb8ca
17 changed files with 625 additions and 101 deletions
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crates/engine/src/cmd/stroke.rs
+11 -2
View File
@@ -2,7 +2,7 @@
use serde_json::Value;
use vectorcraft_color::{Color, Paint};
use vectorcraft_doc::{Arrowhead, Dash, LineCap, LineJoin, StrokeAlign, StrokeLayer, WidthProfile};
use vectorcraft_doc::{ArrowAlign, Arrowhead, Dash, LineCap, LineJoin, StrokeAlign, StrokeLayer, WidthProfile};
use super::*;
@@ -13,7 +13,7 @@ pub fn specs() -> Vec<CommandSpec> {
"Stroke Options",
["Window", "Stroke"],
None,
"{weight?, cap?: butt|round|square, join?: miter|round|bevel, miterLimit?, align?: center|inside|outside, dash?: [d,g,…]|null (a 0 dash with a round or projecting cap draws dots or squares), dashOffset?, alignDashes?, startArrow?, endArrow?: Arrow|ArrowOpen|Triangle|TriangleOpen|Circle|CircleOpen|Square|SquareOpen|Diamond|Bar|null, profile?: \"uniform\"|\"lens\"|\"taperStart\"|\"taperEnd\", ids?}",
"{weight?, cap?: butt|round|square, join?: miter|round|bevel, miterLimit?, align?: center|inside|outside, dash?: [d,g,…]|null (a 0 dash with a round or projecting cap draws dots or squares), dashOffset?, alignDashes?, startArrow?, endArrow?: Arrow|ArrowOpen|Triangle|TriangleOpen|Circle|CircleOpen|Square|SquareOpen|Diamond|Bar|null, arrowAlign?: \"extend\" (tip past the end point, default)|\"tip\" (tip on the end point; the stroke is shortened), profile?: \"uniform\"|\"lens\"|\"taperStart\"|\"taperEnd\", ids?}",
has_doc,
stroke_set
),
@@ -48,6 +48,12 @@ fn stroke_set(s: &mut Session, p: &Value) -> Result<Value> {
}
};
let (sa, ea) = (arrow("startArrow")?, arrow("endArrow")?);
let arrow_align = match str_param(p, "arrowAlign") {
None => None,
Some("extend") => Some(ArrowAlign::Extend),
Some("tip") => Some(ArrowAlign::Tip),
Some(o) => return Err(bad("stroke.set", format!("arrowAlign must be extend|tip, got {o}"))),
};
let profile = match str_param(p, "profile") {
None => None,
Some("uniform") => Some(None),
@@ -102,6 +108,9 @@ fn stroke_set(s: &mut Session, p: &Value) -> Result<Value> {
if let Some(a) = ea {
st.end_arrow = a;
}
if let Some(a) = arrow_align {
st.arrow_align = a;
}
if let Some(pr) = &profile {
st.profile = pr.clone();
}