Refactor the node graph UI wires to render using Kurbo (#2994)

* impl function to check bezpath insideness

* refactor network interface wires to use kurbo

* refactor

* refactor

* fix adding MoveTo instead of LineTo to the grid aligned wire bezpath

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

Author: indierusty

editor/src/messages/portfolio/document/node_graph/node_graph_message_handler.rs

@@ -20,14 +20,13 @@ use crate::messages::tool::common_functionality::graph_modification_utils::{self
 use crate::messages::tool::common_functionality::utility_functions::make_path_editable_is_allowed;
 use crate::messages::tool::tool_messages::tool_prelude::{Key, MouseMotion};
 use crate::messages::tool::utility_types::{HintData, HintGroup, HintInfo};
-use bezier_rs::Subpath;
 use glam::{DAffine2, DVec2, IVec2};
 use graph_craft::document::{DocumentNodeImplementation, NodeId, NodeInput};
 use graph_craft::proto::GraphErrors;
 use graphene_std::math::math_ext::QuadExt;
-use graphene_std::vector::misc::subpath_to_kurbo_bezpath;
+use graphene_std::vector::algorithms::bezpath_algorithms::bezpath_is_inside_bezpath;
 use graphene_std::*;
-use kurbo::{Line, Point};
+use kurbo::{DEFAULT_ACCURACY, Shape};
 use renderer::Quad;
 use std::cmp::Ordering;
 
@@ -958,8 +957,7 @@ impl<'a> MessageHandler<NodeGraphMessage, NodeGraphMessageContext<'a>> for NodeG
 							to_connector_is_layer,
 							GraphWireStyle::Direct,
 						);
-						let mut path_string = String::new();
-						let _ = vector_wire.subpath_to_svg(&mut path_string, DAffine2::IDENTITY);
+						let path_string = vector_wire.to_svg();
 						let wire_path = WirePath {
 							path_string,
 							data_type: self.wire_in_progress_type,
@@ -1196,7 +1194,7 @@ impl<'a> MessageHandler<NodeGraphMessage, NodeGraphMessageContext<'a>> for NodeG
 								.filter(|input| input.1.as_value().is_some())
 								.map(|input| input.0);
 							if let Some(selected_node_input_connect_index) = selected_node_input_connect_index {
-								let Some(bounding_box) = network_interface.node_bounding_box(&selected_node_id, selection_network_path) else {
+								let Some(node_bbox) = network_interface.node_bounding_box(&selected_node_id, selection_network_path) else {
 									log::error!("Could not get bounding box for node: {selected_node_id}");
 									return;
 								};
@@ -1220,31 +1218,12 @@ impl<'a> MessageHandler<NodeGraphMessage, NodeGraphMessageContext<'a>> for NodeG
 										log::debug!("preferences.graph_wire_style: {:?}", preferences.graph_wire_style);
 										let (wire, is_stack) = network_interface.vector_wire_from_input(&input, preferences.graph_wire_style, selection_network_path)?;
 
-										let bbox_rect = kurbo::Rect::new(bounding_box[0].x, bounding_box[0].y, bounding_box[1].x, bounding_box[1].y);
+										let node_bbox = kurbo::Rect::new(node_bbox[0].x, node_bbox[0].y, node_bbox[1].x, node_bbox[1].y).to_path(DEFAULT_ACCURACY);
+										let inside = bezpath_is_inside_bezpath(&wire, &node_bbox, None, None);
 
-										let p1 = DVec2::new(bbox_rect.x0, bbox_rect.y0);
-										let p2 = DVec2::new(bbox_rect.x1, bbox_rect.y0);
-										let p3 = DVec2::new(bbox_rect.x1, bbox_rect.y1);
-										let p4 = DVec2::new(bbox_rect.x0, bbox_rect.y1);
-										let ps = [p1, p2, p3, p4];
-
-										let inside = wire.is_inside_subpath(&Subpath::from_anchors_linear(ps, true), None, None);
-
-										let wire = subpath_to_kurbo_bezpath(wire);
-
-										let intersect = wire.segments().any(|segment| {
-											let rect = kurbo::Rect::new(bounding_box[0].x, bounding_box[0].y, bounding_box[1].x, bounding_box[1].y);
-
-											let top_line = Line::new(Point::new(rect.x0, rect.y0), Point::new(rect.x1, rect.y0));
-											let bottom_line = Line::new(Point::new(rect.x0, rect.y1), Point::new(rect.x1, rect.y1));
-											let left_line = Line::new(Point::new(rect.x0, rect.y0), Point::new(rect.x0, rect.y1));
-											let right_line = Line::new(Point::new(rect.x1, rect.y0), Point::new(rect.x1, rect.y1));
-
-											!segment.intersect_line(top_line).is_empty()
-												|| !segment.intersect_line(bottom_line).is_empty()
-												|| !segment.intersect_line(left_line).is_empty()
-												|| !segment.intersect_line(right_line).is_empty()
-										});
+										let intersect = wire
+											.segments()
+											.any(|segment| node_bbox.segments().filter_map(|segment| segment.as_line()).any(|line| !segment.intersect_line(line).is_empty()));
 
 										(intersect || inside).then_some((input, is_stack))
 									})

editor/src/messages/portfolio/document/utility_types/network_interface.rs

@@ -21,6 +21,7 @@ use graphene_std::vector::click_target::{ClickTarget, ClickTargetType};
 use graphene_std::vector::{PointId, Vector, VectorModificationType};
 use interpreted_executor::dynamic_executor::ResolvedDocumentNodeTypes;
 use interpreted_executor::node_registry::NODE_REGISTRY;
+use kurbo::BezPath;
 use serde_json::{Value, json};
 use std::collections::{HashMap, HashSet, VecDeque};
 use std::hash::{DefaultHasher, Hash, Hasher};
@@ -2713,8 +2714,7 @@ impl NodeNetworkInterface {
 		let thick = vertical_end && vertical_start;
 		let vector_wire = build_vector_wire(output_position, input_position, vertical_start, vertical_end, graph_wire_style);
 
-		let mut path_string = String::new();
-		let _ = vector_wire.subpath_to_svg(&mut path_string, DAffine2::IDENTITY);
+		let path_string = vector_wire.to_svg();
 		let data_type = FrontendGraphDataType::from_type(&self.input_type(&input, network_path).0);
 		let wire_path_update = Some(WirePath {
 			path_string,
@@ -2731,14 +2731,14 @@ impl NodeNetworkInterface {
 	}
 
 	/// Returns the vector subpath and a boolean of whether the wire should be thick.
-	pub fn vector_wire_from_input(&mut self, input: &InputConnector, wire_style: GraphWireStyle, network_path: &[NodeId]) -> Option<(Subpath<PointId>, bool)> {
+	pub fn vector_wire_from_input(&mut self, input: &InputConnector, wire_style: GraphWireStyle, network_path: &[NodeId]) -> Option<(BezPath, bool)> {
 		let Some(input_position) = self.get_input_center(input, network_path) else {
 			log::error!("Could not get dom rect for wire end: {:?}", input);
 			return None;
 		};
 		// An upstream output could not be found, so the wire does not exist, but it should still be loaded as as empty vector
 		let Some(upstream_output) = self.upstream_output_connector(input, network_path) else {
-			return Some((Subpath::from_anchors(std::iter::empty(), false), false));
+			return Some((BezPath::new(), false));
 		};
 		let Some(output_position) = self.get_output_center(&upstream_output, network_path) else {
 			log::error!("Could not get dom rect for wire start: {:?}", upstream_output);
@@ -2752,8 +2752,7 @@ impl NodeNetworkInterface {
 
 	pub fn wire_path_from_input(&mut self, input: &InputConnector, graph_wire_style: GraphWireStyle, dashed: bool, network_path: &[NodeId]) -> Option<WirePath> {
 		let (vector_wire, thick) = self.vector_wire_from_input(input, graph_wire_style, network_path)?;
-		let mut path_string = String::new();
-		let _ = vector_wire.subpath_to_svg(&mut path_string, DAffine2::IDENTITY);
+		let path_string = vector_wire.to_svg();
 		let data_type = FrontendGraphDataType::from_type(&self.input_type(input, network_path).0);
 		Some(WirePath {
 			path_string,

editor/src/messages/portfolio/document/utility_types/wires.rs

@@ -1,8 +1,7 @@
 use crate::messages::portfolio::document::node_graph::utility_types::FrontendGraphDataType;
-use bezier_rs::{ManipulatorGroup, Subpath};
 use glam::{DVec2, IVec2};
-use graphene_std::uuid::NodeId;
-use graphene_std::vector::PointId;
+use graphene_std::{uuid::NodeId, vector::misc::dvec2_to_point};
+use kurbo::{BezPath, DEFAULT_ACCURACY, Line, Point, Shape};
 
 #[derive(Clone, Debug, PartialEq, serde::Serialize, serde::Deserialize, specta::Type)]
 pub struct WirePath {
@@ -53,7 +52,7 @@ impl GraphWireStyle {
 	}
 }
 
-pub fn build_vector_wire(output_position: DVec2, input_position: DVec2, vertical_out: bool, vertical_in: bool, graph_wire_style: GraphWireStyle) -> Subpath<PointId> {
+pub fn build_vector_wire(output_position: DVec2, input_position: DVec2, vertical_out: bool, vertical_in: bool, graph_wire_style: GraphWireStyle) -> BezPath {
 	let grid_spacing = 24.;
 	match graph_wire_style {
 		GraphWireStyle::Direct => {
@@ -85,44 +84,21 @@ pub fn build_vector_wire(output_position: DVec2, input_position: DVec2, vertical
 			let delta01 = DVec2::new((locations[1].x - locations[0].x) * smoothing, (locations[1].y - locations[0].y) * smoothing);
 			let delta23 = DVec2::new((locations[3].x - locations[2].x) * smoothing, (locations[3].y - locations[2].y) * smoothing);
 
-			Subpath::new(
-				vec![
-					ManipulatorGroup {
-						anchor: locations[0],
-						in_handle: None,
-						out_handle: None,
-						id: PointId::generate(),
-					},
-					ManipulatorGroup {
-						anchor: locations[1],
-						in_handle: None,
-						out_handle: Some(locations[1] + delta01),
-						id: PointId::generate(),
-					},
-					ManipulatorGroup {
-						anchor: locations[2],
-						in_handle: Some(locations[2] - delta23),
-						out_handle: None,
-						id: PointId::generate(),
-					},
-					ManipulatorGroup {
-						anchor: locations[3],
-						in_handle: None,
-						out_handle: None,
-						id: PointId::generate(),
-					},
-				],
-				false,
-			)
+			let mut wire = BezPath::new();
+			wire.move_to(dvec2_to_point(locations[0]));
+			wire.line_to(dvec2_to_point(locations[1]));
+			wire.curve_to(dvec2_to_point(locations[1] + delta01), dvec2_to_point(locations[2] - delta23), dvec2_to_point(locations[2]));
+			wire.line_to(dvec2_to_point(locations[3]));
+			wire
 		}
 		GraphWireStyle::GridAligned => {
-			let locations = straight_wire_paths(output_position, input_position, vertical_out, vertical_in);
-			straight_wire_subpath(locations)
+			let locations = straight_wire_path(output_position, input_position, vertical_out, vertical_in);
+			straight_wire_to_bezpath(locations)
 		}
 	}
 }
 
-fn straight_wire_paths(output_position: DVec2, input_position: DVec2, vertical_out: bool, vertical_in: bool) -> Vec<IVec2> {
+fn straight_wire_path(output_position: DVec2, input_position: DVec2, vertical_out: bool, vertical_in: bool) -> Vec<IVec2> {
 	let grid_spacing = 24;
 	let line_width = 2;
 
@@ -446,40 +422,24 @@ fn straight_wire_paths(output_position: DVec2, input_position: DVec2, vertical_o
 	vec![IVec2::new(x1, y1), IVec2::new(x20, y1), IVec2::new(x20, y3), IVec2::new(x4, y3)]
 }
 
-fn straight_wire_subpath(locations: Vec<IVec2>) -> Subpath<PointId> {
+fn straight_wire_to_bezpath(locations: Vec<IVec2>) -> BezPath {
 	if locations.is_empty() {
-		return Subpath::new(Vec::new(), false);
+		return BezPath::new();
 	}
 
+	let to_point = |location: IVec2| Point::new(location.x as f64, location.y as f64);
+
 	if locations.len() == 2 {
-		return Subpath::new(
-			vec![
-				ManipulatorGroup {
-					anchor: locations[0].into(),
-					in_handle: None,
-					out_handle: None,
-					id: PointId::generate(),
-				},
-				ManipulatorGroup {
-					anchor: locations[1].into(),
-					in_handle: None,
-					out_handle: None,
-					id: PointId::generate(),
-				},
-			],
-			false,
-		);
+		let p1 = to_point(locations[0]);
+		let p2 = to_point(locations[1]);
+		Line::new(p1, p2).to_path(DEFAULT_ACCURACY);
 	}
 
 	let corner_radius = 10;
 
 	// Create path with rounded corners
-	let mut path = vec![ManipulatorGroup {
-		anchor: locations[0].into(),
-		in_handle: None,
-		out_handle: None,
-		id: PointId::generate(),
-	}];
+	let mut path = BezPath::new();
+	path.move_to(to_point(locations[0]));
 
 	for i in 1..(locations.len() - 1) {
 		let prev = locations[i - 1];
@@ -563,27 +523,9 @@ fn straight_wire_subpath(locations: Vec<IVec2>) -> Subpath<PointId> {
 				},
 		);
 
-		path.extend(vec![
-			ManipulatorGroup {
-				anchor: corner_start.into(),
-				in_handle: None,
-				out_handle: Some(corner_start_mid.into()),
-				id: PointId::generate(),
-			},
-			ManipulatorGroup {
-				anchor: corner_end.into(),
-				in_handle: Some(corner_end_mid.into()),
-				out_handle: None,
-				id: PointId::generate(),
-			},
-		])
+		path.line_to(to_point(corner_start));
+		path.curve_to(to_point(corner_start_mid), to_point(corner_end_mid), to_point(corner_end));
 	}
-
-	path.push(ManipulatorGroup {
-		anchor: (*locations.last().unwrap()).into(),
-		in_handle: None,
-		out_handle: None,
-		id: PointId::generate(),
-	});
-	Subpath::new(path, false)
+	path.line_to(to_point(*locations.last().unwrap()));
+	path
 }

node-graph/gcore/src/vector/algorithms/bezpath_algorithms.rs

@@ -466,3 +466,70 @@ pub fn round_line_join(bezpath1: &BezPath, bezpath2: &BezPath, center: DVec2) ->
 
 	compute_circular_subpath_details(left, arc_point, right, center, Some(angle))
 }
+
+/// Returns `true` if the `bezpath1` is completely inside the `bezpath2`.
+pub fn bezpath_is_inside_bezpath(bezpath1: &BezPath, bezpath2: &BezPath, accuracy: Option<f64>, minimum_separation: Option<f64>) -> bool {
+	// Eliminate any possibility of one being inside the other, if either of them is empty
+	if bezpath1.is_empty() || bezpath2.is_empty() {
+		return false;
+	}
+
+	let inner_bbox = bezpath1.bounding_box();
+	let outer_bbox = bezpath2.bounding_box();
+
+	// Eliminate bezpath1 if its bounding box is not completely inside the bezpath2's bounding box.
+	// Reasoning:
+	// If the inner bezpath bounding box is larger than the outer bezpath bounding box in any direction
+	// then the inner bezpath is intersecting with or outside the outer bezpath.
+	if !outer_bbox.contains_rect(inner_bbox) {
+		return false;
+	}
+
+	// Eliminate bezpath1 if any of its anchor points are outside the bezpath2.
+	if !bezpath1.elements().iter().filter_map(|el| el.end_point()).all(|point| bezpath2.contains(point)) {
+		return false;
+	}
+
+	// Eliminate this subpath if it intersects with the other subpath.
+	if !bezpath_intersections(bezpath1, bezpath2, accuracy, minimum_separation).is_empty() {
+		return false;
+	}
+
+	// At this point:
+	// (1) This subpath's bounding box is inside the other subpath's bounding box,
+	// (2) Its anchors are inside the other subpath, and
+	// (3) It is not intersecting with the other subpath.
+	// Hence, this subpath is completely inside the given other subpath.
+	true
+}
+
+#[cfg(test)]
+mod tests {
+	// TODO: add more intersection tests
+
+	use super::bezpath_is_inside_bezpath;
+	use kurbo::{BezPath, DEFAULT_ACCURACY, Line, Point, Rect, Shape};
+
+	#[test]
+	fn is_inside_subpath() {
+		let boundary_polygon = Rect::new(100., 100., 500., 500.).to_path(DEFAULT_ACCURACY);
+
+		let mut curve_intersection = BezPath::new();
+		curve_intersection.move_to(Point::new(189., 289.));
+		curve_intersection.quad_to(Point::new(9., 286.), Point::new(45., 410.));
+		assert!(!bezpath_is_inside_bezpath(&curve_intersection, &boundary_polygon, None, None));
+
+		let mut curve_outside = BezPath::new();
+		curve_outside.move_to(Point::new(115., 37.));
+		curve_outside.quad_to(Point::new(51.4, 91.8), Point::new(76.5, 242.));
+		assert!(!bezpath_is_inside_bezpath(&curve_outside, &boundary_polygon, None, None));
+
+		let mut curve_inside = BezPath::new();
+		curve_inside.move_to(Point::new(210.1, 133.5));
+		curve_inside.curve_to(Point::new(150.2, 436.9), Point::new(436., 285.), Point::new(247.6, 240.7));
+		assert!(bezpath_is_inside_bezpath(&curve_inside, &boundary_polygon, None, None));
+
+		let line_inside = Line::new(Point::new(101., 101.5), Point::new(150.2, 499.)).to_path(DEFAULT_ACCURACY);
+		assert!(bezpath_is_inside_bezpath(&line_inside, &boundary_polygon, None, None));
+	}
+}

node-graph/gcore/src/vector/misc.rs

@@ -1,7 +1,7 @@
 use super::PointId;
 use super::algorithms::offset_subpath::MAX_ABSOLUTE_DIFFERENCE;
 use crate::vector::{SegmentId, Vector};
-use bezier_rs::{BezierHandles, ManipulatorGroup, Subpath};
+use bezier_rs::{BezierHandles, ManipulatorGroup};
 use dyn_any::DynAny;
 use glam::DVec2;
 use kurbo::{BezPath, CubicBez, Line, ParamCurve, PathSeg, Point, QuadBez};
@@ -136,12 +136,6 @@ pub fn handles_to_segment(start: DVec2, handles: BezierHandles, end: DVec2) -> P
 	}
 }
 
-pub fn subpath_to_kurbo_bezpath(subpath: Subpath<PointId>) -> BezPath {
-	let manipulator_groups = subpath.manipulator_groups();
-	let closed = subpath.closed();
-	bezpath_from_manipulator_groups(manipulator_groups, closed)
-}
-
 pub fn bezpath_from_manipulator_groups(manipulator_groups: &[ManipulatorGroup<PointId>], closed: bool) -> BezPath {
 	let mut bezpath = kurbo::BezPath::new();
 	let mut out_handle;