Add post-routing teardrops and saved path width interpolation

lib/components/base-components/Renderable.ts

@@ -69,6 +69,7 @@ export const orderedRenderPhases = [
   "PcbPlacementDesignRuleChecks",
   "PcbTraceRender",
   "PcbRouteNetIslands",
+  "PcbTraceTeardropRender",
   "PcbCopperPourRender",
   "PcbViaStitchRender",
   "PcbCopperPourCleanup",
@@ -125,12 +126,14 @@ const asyncPhaseDependencies: Partial<Record<RenderPhase, RenderPhase[]>> = {
   PcbBoardAutoSize: ["PcbFootprintStringRender", "FetchPartFootprint"],
   PcbTraceHintRender: ["PcbFootprintStringRender", "FetchPartFootprint"],
   PcbManualTraceRender: ["PcbFootprintStringRender", "FetchPartFootprint"],
+  PcbTraceTeardropRender: ["PcbTraceRender", "PcbRouteNetIslands"],
   PcbCopperPourRender: [
     "PcbFootprintStringRender",
     "FetchPartFootprint",
     "PcbPlacementDesignRuleChecks",
     "PcbTraceRender",
     "PcbRouteNetIslands",
+    "PcbTraceTeardropRender",
   ],
   PcbViaStitchRender: [
     "PcbFootprintStringRender",

lib/components/primitive-components/Breakout/get-saved-fanout-traces.ts

@@ -1,3 +1,7 @@
+import {
+  resolveSavedTraceRouteWidths,
+  getSavedTraceViaContactWidths,
+} from "lib/utils/autorouting/resolve-saved-trace-route-widths"
 import { getViaBoardLayers } from "lib/utils/getViaSpanLayers"
 import { applyToPoint, compose, translate } from "transformation-matrix"
 import type {
@@ -57,7 +61,7 @@ export function getSavedFanoutTraces(
         translate(-localExit.x, -localExit.y),
       )
       const originalExit = applyToPoint(transform, localExit)
-      const route = path.route.map((point) => {
+      const route = resolveSavedTraceRouteWidths(path.route).map((point) => {
         const position = applyToPoint(transform, point)
         return {
           ...point,
@@ -103,23 +107,30 @@ export function getSavedFanoutTraces(
         )
       // Explicit wire contacts keep Circuit JSON connectivity checks aware of
       // the pad/exit layer without changing the saved copper or via position.
-      const width =
-        route.find((point) => point.route_type === "wire")?.width ??
-        input.minTraceWidth
+      const startContactWidths = getSavedTraceViaContactWidths(
+        route,
+        0,
+        input.minTraceWidth,
+      )
+      const endContactWidths = getSavedTraceViaContactWidths(
+        route,
+        route.length - 1,
+        input.minTraceWidth,
+      )
       if (first.route_type === "via") {
         route.splice(1, 0, {
           route_type: "wire",
           x: first.x,
           y: first.y,
           layer: first.to_layer,
-          width,
+          width: startContactWidths.toWidth,
         })
         route.unshift({
           route_type: "wire",
           x: first.x,
           y: first.y,
           layer: first.from_layer,
-          width,
+          width: startContactWidths.fromWidth,
         })
       }
       if (last.route_type === "via") {
@@ -128,14 +139,14 @@ export function getSavedFanoutTraces(
           x: last.x,
           y: last.y,
           layer: last.from_layer,
-          width,
+          width: endContactWidths.fromWidth,
         })
         route.push({
           route_type: "wire",
           x: last.x,
           y: last.y,
           layer: last.to_layer,
-          width,
+          width: endContactWidths.toWidth,
         })
       }
       if (last.route_type === "via") {
@@ -146,7 +157,7 @@ export function getSavedFanoutTraces(
           x: last.x,
           y: last.y,
           layer: last.to_layer,
-          width,
+          width: endContactWidths.toWidth,
         })
       }
       coveredConnections.add(connection)

lib/components/primitive-components/Group/get-saved-autorouting-phase-traces.ts

@@ -1,3 +1,7 @@
+import {
+  resolveSavedTraceRouteWidths,
+  getSavedTraceViaContactWidths,
+} from "lib/utils/autorouting/resolve-saved-trace-route-widths"
 import { applyToPoint } from "transformation-matrix"
 import { fanoutTracePath } from "@tscircuit/props"
 import type { z } from "zod"
@@ -106,7 +110,7 @@ export function getSavedAutoroutingPhaseTracesFromPaths({
         `Saved phase path "${path.connection}" starts at an endpoint already joined by another path`,
       )
     const transform = getSavedPcbTracePathTransform(group, port)
-    const route = path.route.map((point) => ({
+    const route = resolveSavedTraceRouteWidths(path.route).map((point) => ({
       ...point,
       ...applyToPoint(transform, point),
     }))
@@ -168,37 +172,43 @@ export function getSavedAutoroutingPhaseTracesFromPaths({
     }
     // Explicit wire contacts expose via connectivity to Circuit JSON consumers
     // without moving any saved copper. Interior vias need contacts too.
-    const width =
-      route.find((point) => point.route_type === "wire")?.width ??
-      input.minTraceWidth
-    const routeWithViaContacts = route.flatMap((point): typeof route =>
-      point.route_type === "via"
-        ? [
-            {
-              route_type: "wire",
-              x: point.x,
-              y: point.y,
-              layer: point.from_layer,
-              width,
-            },
-            point,
-            {
-              route_type: "wire",
-              x: point.x,
-              y: point.y,
-              layer: point.to_layer,
-              width,
-            },
-          ]
-        : [point],
-    )
+    const routeWithViaContacts = route.flatMap((point, index): typeof route => {
+      if (point.route_type !== "via") return [point]
+      const { fromWidth, toWidth } = getSavedTraceViaContactWidths(
+        route,
+        index,
+        input.minTraceWidth,
+      )
+      return [
+        {
+          route_type: "wire",
+          x: point.x,
+          y: point.y,
+          layer: point.from_layer,
+          width: fromWidth,
+        },
+        point,
+        {
+          route_type: "wire",
+          x: point.x,
+          y: point.y,
+          layer: point.to_layer,
+          width: toWidth,
+        },
+      ]
+    })
     if (last.route_type === "via") {
+      const { toWidth } = getSavedTraceViaContactWidths(
+        route,
+        route.length - 1,
+        input.minTraceWidth,
+      )
       routeWithViaContacts.push({
         route_type: "wire",
         x: last.x,
         y: last.y,
         layer: last.to_layer,
-        width,
+        width: toWidth,
       })
     }
     coveredConnections.add(connection)

lib/components/primitive-components/Trace/Trace.ts

@@ -42,6 +42,7 @@ import type { TraceI } from "./TraceI"
 import { Trace__doInitialSchematicTraceRenderWithDisplayLabel } from "./Trace__doInitialSchematicTraceRenderWithDisplayLabel"
 import { Trace__findConnectedPorts } from "./Trace__findConnectedPorts"
 import { Trace_doInitialPcbManualTraceRender } from "./Trace_doInitialPcbManualTraceRender"
+import { Trace_doInitialPcbTraceTeardropRender } from "./Trace_doInitialPcbTraceTeardropRender"
 import { Trace_doInitialPcbTraceRender } from "./Trace_doInitialPcbTraceRender"
 import { Trace_doInitialSchematicTraceRender } from "./Trace_doInitialSchematicTraceRender"
 import { getMaxLengthFromConnectedComponents } from "./trace-utils/get-max-length-from-connected-components"
@@ -368,6 +369,14 @@ export class Trace
     Trace_doInitialPcbManualTraceRender(this)
   }
 
+  doInitialPcbTraceTeardropRender(): void {
+    Trace_doInitialPcbTraceTeardropRender(this)
+  }
+
+  updatePcbTraceTeardropRender(): void {
+    Trace_doInitialPcbTraceTeardropRender(this)
+  }
+
   doInitialPcbTraceRender(): void {
     Trace_doInitialPcbTraceRender(this)
   }