Karl Von Richter
47a7f29485
Sketch Mirror, rectangular and circular Pattern, and Offset now show a green live preview that follows the selection and settings; OK commits, Cancel leaves the sketch unchanged. The shared dialogs show the current selection step and source counts, sources can be toggled with Ctrl/Cmd-click, cleared and reselected. Offsets keep editable driving distance dimensions (One Side, Two Sides, Symmetric) that update the derived curves without moving the source, with undo/redo and save/reopen. Format 19: older files keep their fixed offsets. New dialog labels in en, zh, ja, de and ko. Fixes #696. Fixes #517.
219 lines
11 KiB
Rust
219 lines
11 KiB
Rust
//! Associative offsets keep their output entity ids while their source curves move.
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use crate::{ConstraintKind, CurveKind, Shape, Sketch, SketchError, intersections};
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use serde::{Deserialize, Serialize};
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use solidcraft_geom::Vec2;
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#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
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pub struct OffsetChain {
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pub sources: Vec<(String, bool)>,
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pub outputs: Vec<String>,
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pub distance: f64,
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pub closed: bool,
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#[serde(default, skip_serializing_if = "Option::is_none")]
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pub topology: Option<crate::offset_topology::OffsetTopology>,
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}
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impl OffsetChain {
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/// Includes reserved corner roles that may temporarily disappear from the boundary.
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pub fn owns_output(&self, output: &str) -> bool {
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self.outputs.iter().any(|id| id == output) || self.topology.as_ref().is_some_and(|t| t.roles.iter().any(|r| r.output == output))
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}
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}
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impl Sketch {
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/// The signed distance of the association that owns an output (including retired roles).
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pub fn offset_distance(&self, output: &str) -> Option<f64> {
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self.offsets
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.iter()
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.find(|o| o.owns_output(output))
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.map(|o| o.distance)
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.or_else(|| self.freeform_offsets.iter().find(|o| o.output == output).map(|o| o.distance))
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}
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/// Endpoints of a normal-distance annotation, evaluated from its source curve.
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pub fn offset_dimension_points(&self, output: &str) -> Option<(Vec2, Vec2)> {
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let (source, forward, distance) = self
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.offsets
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.iter()
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.find(|o| o.owns_output(output))
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.and_then(|o| o.sources.first().map(|(id, forward)| (id.as_str(), *forward, o.distance)))
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.or_else(|| self.freeform_offsets.iter().find(|o| o.output == output).map(|o| (o.source.as_str(), o.forward, o.distance)))?;
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let index = self.curve_index(source)?;
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let segment = self.exact_segs(index).unwrap_or_else(|| self.segs(index)).into_iter().next()?;
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let p = segment.point_at(0.5);
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let tangent = (segment.point_at(0.5001) - segment.point_at(0.4999)).normalized()?;
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Some((p, p + tangent.perp() * if forward { distance } else { -distance }))
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}
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/// Removing an output removes its relationship. A partial analytic chain
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/// deletion releases the surviving outputs, while retained dependents keep
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/// their source references so the command's refresh refuses broken sources.
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pub(crate) fn prune_offsets_for_removed_curves(&mut self, which: &[usize]) {
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let removed = which.iter().filter_map(|i| self.curves.get(*i).map(|curve| curve.id.clone())).collect::<std::collections::BTreeSet<_>>();
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if removed.is_empty() {
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return;
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}
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let released = self
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.offsets
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.iter()
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.filter(|offset| offset.outputs.iter().any(|id| removed.contains(id)))
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.flat_map(|offset| offset.outputs.iter().cloned().chain(offset.topology.iter().flat_map(|t| t.roles.iter().map(|r| r.output.clone()))))
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.chain(self.freeform_offsets.iter().filter(|offset| removed.contains(&offset.output)).map(|offset| offset.output.clone()))
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.collect::<std::collections::BTreeSet<_>>();
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self.offsets.retain(|offset| !offset.outputs.iter().any(|id| removed.contains(id)));
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self.freeform_offsets.retain(|offset| !removed.contains(&offset.output));
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self.constraints.retain(|c| !matches!(&c.kind, ConstraintKind::OffsetDistance { output, .. } if released.contains(output)));
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let points = self
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.curves
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.iter()
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.filter(|curve| released.contains(&curve.id))
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.flat_map(|curve| curve.kind.point_ids())
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.collect::<std::collections::BTreeSet<_>>();
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for index in points {
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if index != 0
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&& self.curves.iter().all(|curve| !curve.kind.uses(index) || released.contains(&curve.id))
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&& let Some(point) = self.points.get_mut(index)
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{
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point.fixed = false;
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}
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}
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}
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pub fn refresh_offsets(&mut self) -> Result<(), SketchError> {
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if self.offsets.is_empty() && self.freeform_offsets.is_empty() {
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return Ok(());
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}
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let mut candidate = self.clone();
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let mut driven = std::collections::BTreeSet::new();
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for constraint in &self.constraints {
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if let ConstraintKind::OffsetDistance { output, value, reverse } = &constraint.kind {
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self.validate(&constraint.kind)?;
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let analytic = candidate.offsets.iter().position(|o| o.owns_output(output));
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let freeform = candidate.freeform_offsets.iter().position(|o| o.output == *output);
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let identity = analytic
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.or_else(|| freeform.map(|i| candidate.offsets.len() + i))
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.ok_or_else(|| SketchError::Invalid("missing offset dimension association".into()))?;
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if constraint.driven || !driven.insert(identity) {
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return Err(SketchError::Invalid("an offset must have exactly one driving distance".into()));
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}
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let distance = if *reverse { -*value } else { *value };
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if let Some(offset) = analytic.and_then(|i| candidate.offsets.get_mut(i)) {
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offset.distance = distance;
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}
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if let Some(offset) = freeform.and_then(|i| candidate.freeform_offsets.get_mut(i)) {
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offset.distance = distance;
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}
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}
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}
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candidate.refresh_analytic_offsets()?;
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candidate.refresh_freeform_offsets()?;
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*self = candidate;
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Ok(())
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}
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fn refresh_analytic_offsets(&mut self) -> Result<(), SketchError> {
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for index in 0..self.offsets.len() {
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if self.refresh_convex_offset(index)? {
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continue;
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}
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let offset = self.offsets.get(index).cloned().ok_or_else(|| SketchError::Invalid("missing offset chain".into()))?;
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if offset.sources.len() != offset.outputs.len() || offset.sources.len() > 10_000 || !offset.distance.is_finite() {
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return Err(SketchError::Invalid("damaged offset chain".into()));
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}
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let bad = || SketchError::Invalid("an offset source vanished or changed shape".into());
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let mut pieces = Vec::new();
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for (id, forward) in &offset.sources {
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let i = self.curve_index(id).ok_or_else(bad)?;
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let kind = &self.curves.get(i).ok_or_else(bad)?.kind;
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let piece = match *kind {
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CurveKind::Line { a, b } => {
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let (a, b) = (self.point(a).ok_or_else(bad)?, self.point(b).ok_or_else(bad)?);
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let (a, b) = if *forward { (a, b) } else { (b, a) };
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let n = (b - a).normalized().ok_or_else(bad)?.perp() * offset.distance;
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(Shape::Line { a: a + n, b: b + n }, a + n, b + n)
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}
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CurveKind::Arc { c, a, b } => {
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let (c, a, b) = (self.point(c).ok_or_else(bad)?, self.point(a).ok_or_else(bad)?, self.point(b).ok_or_else(bad)?);
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let r = c.dist(a) - if *forward { offset.distance } else { -offset.distance };
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if r <= 1e-9 {
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return Err(SketchError::Invalid("the offset collapses an arc".into()));
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}
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let a = c + (a - c).normalized().ok_or_else(bad)? * r;
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let b = c + (b - c).normalized().ok_or_else(bad)? * r;
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let (a, b) = if *forward { (a, b) } else { (b, a) };
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(Shape::Round { c, r, start: 0.0, sweep: std::f64::consts::TAU }, a, b)
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}
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CurveKind::Circle { c, r } => {
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let c = self.point(c).ok_or_else(bad)?;
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let r = r - offset.distance;
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if r <= 1e-9 {
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return Err(SketchError::Invalid("the offset collapses a circle".into()));
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}
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let out = offset.outputs.first().and_then(|id| self.curve_index(id)).ok_or_else(bad)?;
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if let Some(crate::Curve { kind: CurveKind::Circle { r: target, .. }, .. }) = self.curves.get_mut(out) {
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*target = r;
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} else {
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return Err(bad());
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}
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let _ = c;
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continue;
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}
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_ => return Err(bad()),
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};
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pieces.push(piece);
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}
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if pieces.is_empty() {
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continue;
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}
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let joint = |i: usize, j: usize| -> Result<Vec2, SketchError> {
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let (x, y) = (pieces.get(i).ok_or_else(bad)?, pieces.get(j).ok_or_else(bad)?);
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if x.2.dist(y.1) < 1e-6 {
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return Ok(x.2);
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}
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let guess = (x.2 + y.1) * 0.5;
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intersections(&x.0, &y.0)
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.into_iter()
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.min_by(|a, b| a.dist(guess).total_cmp(&b.dist(guess)))
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.ok_or_else(|| SketchError::Invalid("the offset curves no longer meet".into()))
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};
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let n = pieces.len();
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let mut joints = vec![if offset.closed { joint(n - 1, 0)? } else { pieces.first().ok_or_else(bad)?.1 }];
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for i in 0..n.saturating_sub(1) {
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joints.push(joint(i, i + 1)?);
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}
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if !offset.closed {
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joints.push(pieces.last().ok_or_else(bad)?.2);
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}
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for (i, id) in offset.outputs.iter().enumerate() {
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let a = *joints.get(i).ok_or_else(bad)?;
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let b = *joints.get(if offset.closed { (i + 1) % n } else { i + 1 }).ok_or_else(bad)?;
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let shape = &pieces.get(i).ok_or_else(bad)?.0;
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if let Shape::Line { a: p, b: q } = shape
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&& (b - a).dot(*q - *p) <= 1e-9
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{
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return Err(SketchError::Invalid("the offset curves would cross".into()));
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}
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let ci = self.curve_index(id).ok_or_else(bad)?;
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let kind = self.curves.get(ci).ok_or_else(bad)?.kind.clone();
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let (pa, pb) = match kind {
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CurveKind::Line { a, b } => (a, b),
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CurveKind::Arc { a, b, .. } => {
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if offset.sources.get(i).is_some_and(|x| x.1) {
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(a, b)
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} else {
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(b, a)
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}
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}
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_ => return Err(bad()),
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};
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for (pi, pos) in [(pa, a), (pb, b)] {
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if let Some(p) = self.points.get_mut(pi) {
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p.pos = pos;
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p.fixed = true;
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}
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}
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}
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}
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Ok(())
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}
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}
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