topola 0.1.0

Work-in-progress free and open-source topological (rubberband) router and autorouter for printed circuit boards (PCBs)
Documentation 
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// SPDX-FileCopyrightText: 2026 Topola contributors
//
// SPDX-License-Identifier: MIT OR Apache-2.0

use derive_more::{Constructor, From};
use serde::{Deserialize, Serialize};

use crate::layout::compounds::{ComponentId, NetId, PinId};
use crate::layout::primitives::{SegId, ViaId};
use crate::vector::Vector2;
use crate::{Rect3, Vector3, layout::LayerId};

#[derive(
    Clone,
    Constructor,
    Copy,
    Debug,
    Default,
    Deserialize,
    Eq,
    From,
    Ord,
    PartialEq,
    PartialOrd,
    Serialize,
)]
pub struct JointId(usize);

impl JointId {
    /// Returns the underlying index.
    #[inline]
    pub fn index(self) -> usize {
        self.0
    }
}

#[derive(Clone, Copy, Debug)]
pub struct JointSpec {
    pub position: Vector2<i64>,
    pub layer: LayerId,
    pub radius: u64,
    pub net: Option<NetId>,
    pub component: Option<ComponentId>,
    pub pin: Option<PinId>,
}

#[derive(Clone, Debug)]
pub struct Joint {
    pub spec: JointSpec,
    pub segs: Vec<SegId>,
    pub vias: Vec<ViaId>,
}

impl Joint {
    pub fn new(spec: JointSpec) -> Self {
        Joint {
            spec,
            segs: Vec::new(),
            vias: Vec::new(),
        }
    }

    pub fn center(&self) -> Vector2<i64> {
        self.spec.position
    }

    pub fn bbox(&self) -> Rect3<i64> {
        let radius = self.spec.radius as i64;
        let layer = self.spec.layer.index() as i64;

        Rect3::new(
            Vector3::new(
                self.spec.position.x - radius,
                self.spec.position.y - radius,
                layer,
            ),
            Vector3::new(
                self.spec.position.x + radius,
                self.spec.position.y + radius,
                layer,
            ),
        )
    }

    pub fn contains_point2(&self, point: Vector2<i64>) -> bool {
        (point.x - self.spec.position.x).pow(2) as u64
            + (point.y - self.spec.position.y).pow(2) as u64
            <= self.spec.radius.pow(2)
    }
}