Add Heart shape tool

- Add new_heart() method
- Add Heart node to vector generator nodes
- Add Heart to ShapeType enum and UI dropdown

node-graph/libraries/vector-types/src/subpath/core.rs

@@ -317,6 +317,18 @@ impl<PointId: Identifier> Subpath<PointId> {
 		Self::from_anchors([p1, p2], false)
 	}
 
+	/// Constructs a heart shape centered at the origin with the given radius.
+	pub fn new_heart(center: DVec2, radius: f64) -> Self {
+		let bottom = center + DVec2::new(0., radius);
+		let top = center + DVec2::new(0., -radius * 0.4);
+
+		let manipulator_groups = vec![
+			ManipulatorGroup::new(bottom, Some(bottom + DVec2::new(radius * 1.2, -radius * 0.9)), Some(bottom + DVec2::new(-radius * 1.2, -radius * 0.9))),
+			ManipulatorGroup::new(top, Some(top + DVec2::new(-radius * 1.2, -radius * 0.6)), Some(top + DVec2::new(radius * 1.2, -radius * 0.6))),
+		];
+		Self::new(manipulator_groups, true)
+	}
+
 	pub fn new_spiral(a: f64, outer_radius: f64, turns: f64, start_angle: f64, delta_theta: f64, spiral_type: SpiralType) -> Self {
 		let mut manipulator_groups = Vec::new();
 		let mut prev_in_handle = None;

node-graph/nodes/vector/src/generator_nodes.rs

@@ -201,6 +201,19 @@ fn line(
 	Table::new_from_element(Vector::from_subpath(subpath::Subpath::new_line(start, end)))
 }
 
+/// Generates a heart shape with a chosen radius.
+#[node_macro::node(category("Vector: Shape"))]
+fn heart(
+	_: impl Ctx,
+	_primary: (),
+	#[unit(" px")]
+	#[default(50.)]
+	radius: f64,
+) -> Table<Vector> {
+	let radius = radius.abs();
+	Table::new_from_element(Vector::from_subpath(subpath::Subpath::new_heart(DVec2::ZERO, radius)))
+}
+
 trait GridSpacing {
 	fn as_dvec2(&self) -> DVec2;
 }