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Bezier-rs: Subpath offset and bezier offset improvements (#1039)

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* Added subpath offset

* Enhanced offset to produce smooth curves

* Lots of outline bugfixes

* Fixed failing unit tests

* Added subpath outline

* Refactor bezier offset and outline to return Subpaths

* Fix outline bug due to smooth joining and removed reduce optimization that causes jumping approximations

* Bugfix when subpath angle is acute but doesn't intersect

* Stylistic changes per review

* Stylistic changes per review and updated doc comments

---------

Co-authored-by: Hannah Li <hannahli2010@gmail.com>
Co-authored-by: Keavon Chambers <keavon@keavon.com>
This commit is contained in:
Rob Nadal
2023-03-03 14:21:21 -05:00
committed by GitHub
co-authored by Hannah Li Keavon Chambers
parent 0512cb249f
commit 2fd5c26450
16 changed files with 611 additions and 168 deletions
Download Patch File Download Diff File Expand all files Collapse all files
website/other/bezier-rs-demos/wasm/src/bezier.rs
+24 -11
View File
@@ -1,5 +1,5 @@
use crate::svg_drawing::*;
use bezier_rs::{ArcStrategy, ArcsOptions, Bezier, ProjectionOptions, TValue};
use bezier_rs::{ArcStrategy, ArcsOptions, Bezier, Identifier, ProjectionOptions, TValue};
use glam::DVec2;
use serde::{Deserialize, Serialize};
use wasm_bindgen::prelude::*;
@@ -49,6 +49,16 @@ fn parse_t_variant(t_variant: &String, t: f64) -> TValue {
}
}
/// An empty id type for use in tests
#[derive(Clone, Copy, PartialEq, Eq, Hash)]
pub(crate) struct EmptyId;
impl Identifier for EmptyId {
fn new() -> Self {
Self
}
}
#[wasm_bindgen]
impl WasmBezier {
/// Expect js_points to be a list of 2 pairs.
@@ -542,7 +552,7 @@ impl WasmBezier {
let original_curve_svg = self.get_bezier_path();
let bezier_curves_svg = self
.0
.offset(distance)
.offset::<EmptyId>(distance)
.iter()
.enumerate()
.map(|(index, bezier_curve)| {
@@ -561,36 +571,39 @@ impl WasmBezier {
}
pub fn outline(&self, distance: f64) -> String {
let outline_beziers = self.0.outline(distance);
if outline_beziers.is_empty() {
let outline_subpath = self.0.outline::<EmptyId>(distance);
if outline_subpath.is_empty() {
return String::new();
}
let outline_svg = draw_beziers(outline_beziers, CURVE_ATTRIBUTES.to_string().replace(BLACK, RED));
let mut outline_svg = String::new();
outline_subpath.to_svg(&mut outline_svg, CURVE_ATTRIBUTES.to_string().replace(BLACK, RED), String::new(), String::new(), String::new());
let bezier_svg = self.get_bezier_path();
wrap_svg_tag(format!("{bezier_svg}{outline_svg}"))
}
pub fn graduated_outline(&self, start_distance: f64, end_distance: f64) -> String {
let outline_beziers = self.0.graduated_outline(start_distance, end_distance);
if outline_beziers.is_empty() {
let outline_subpath = self.0.graduated_outline::<EmptyId>(start_distance, end_distance);
if outline_subpath.is_empty() {
return String::new();
}
let outline_svg = draw_beziers(outline_beziers, CURVE_ATTRIBUTES.to_string().replace(BLACK, RED));
let mut outline_svg = String::new();
outline_subpath.to_svg(&mut outline_svg, CURVE_ATTRIBUTES.to_string().replace(BLACK, RED), String::new(), String::new(), String::new());
let bezier_svg = self.get_bezier_path();
wrap_svg_tag(format!("{bezier_svg}{outline_svg}"))
}
pub fn skewed_outline(&self, distance1: f64, distance2: f64, distance3: f64, distance4: f64) -> String {
let outline_beziers = self.0.skewed_outline(distance1, distance2, distance3, distance4);
if outline_beziers.is_empty() {
let outline_subpath = self.0.skewed_outline::<EmptyId>(distance1, distance2, distance3, distance4);
if outline_subpath.is_empty() {
return String::new();
}
let outline_svg = draw_beziers(outline_beziers, CURVE_ATTRIBUTES.to_string().replace(BLACK, RED));
let mut outline_svg = String::new();
outline_subpath.to_svg(&mut outline_svg, CURVE_ATTRIBUTES.to_string().replace(BLACK, RED), String::new(), String::new(), String::new());
let bezier_svg = self.get_bezier_path();
wrap_svg_tag(format!("{bezier_svg}{outline_svg}"))