width alias for trace thickness. Support pcbPath not having <2 items

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

@@ -62,6 +62,13 @@ export class Trace
     this._portsRoutedOnPcb = []
   }
 
+  /**
+   * Get the explicit trace thickness, supporting 'width' as an alias for 'thickness'
+   */
+  _getExplicitTraceThickness(): number | undefined {
+    return this._parsedProps.thickness ?? this._parsedProps.width
+  }
+
   get config() {
     return {
       zodProps: traceProps,
@@ -276,7 +283,7 @@ export class Trace
           { db },
         ) ?? props.maxLength,
       display_name: displayName,
-      min_trace_thickness: props.thickness,
+      min_trace_thickness: this._getExplicitTraceThickness(),
     })
 
     this.source_trace_id = trace.source_trace_id

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

@@ -10,7 +10,7 @@ export function Trace_doInitialPcbManualTraceRender(trace: Trace) {
   const { _parsedProps: props } = trace
   const subcircuit = trace.getSubcircuit()
 
-  if (!props.pcbPath || props.pcbPath.length === 0) return
+  if (!props.pcbPath) return
 
   const { allPortsFound, ports, portsWithSelectors } =
     trace._findConnectedPorts()
@@ -57,7 +57,9 @@ export function Trace_doInitialPcbManualTraceRender(trace: Trace) {
 
   const layer = anchorPort.getAvailablePcbLayers()[0] || "top"
   const width =
-    props.thickness ?? trace.getSubcircuit()._parsedProps.minTraceWidth ?? 0.16
+    trace._getExplicitTraceThickness() ??
+    trace.getSubcircuit()._parsedProps.minTraceWidth ??
+    0.16
 
   const anchorPos = anchorPort._getGlobalPcbPositionAfterLayout()
   const otherPos = otherPort._getGlobalPcbPositionAfterLayout()

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

@@ -277,7 +277,9 @@ export function Trace_doInitialPcbTraceRender(trace: Trace) {
     const pcbPortB = "pcb_port_id" in b ? b.pcb_port_id : null
 
     const minTraceWidth =
-      trace.getSubcircuit()._parsedProps.minTraceWidth ?? 0.16
+      trace._getExplicitTraceThickness() ??
+      trace.getSubcircuit()._parsedProps.minTraceWidth ??
+      0.16
 
     const ijump = new MultilayerIjump({
       OBSTACLE_MARGIN: minTraceWidth * 2,

lib/utils/autorouting/SimpleRouteJson.ts

@@ -32,6 +32,7 @@ export type Obstacle = {
 export interface SimpleRouteConnection {
   name: string
   source_trace_id?: string
+  width?: number // Trace width/thickness, falls back to minTraceWidth if not specified
   pointsToConnect: Array<{
     x: number
     y: number

lib/utils/autorouting/getSimpleRouteJsonFromCircuitJson.ts

@@ -187,6 +187,7 @@ export const getSimpleRouteJsonFromCircuitJson = ({
           connMap.getNetConnectedToId(trace.source_trace_id) ??
           "",
         source_trace_id: trace.source_trace_id,
+        width: trace.min_trace_thickness,
         pointsToConnect: [
           {
             x: portA.x!,

package.json

@@ -42,7 +42,7 @@
     "@tscircuit/matchpack": "^0.0.16",
     "@tscircuit/math-utils": "^0.0.29",
     "@tscircuit/miniflex": "^0.0.4",
-    "@tscircuit/props": "0.0.371",
+    "@tscircuit/props": "0.0.378",
     "@tscircuit/schematic-autolayout": "^0.0.6",
     "@tscircuit/schematic-match-adapt": "^0.0.16",
     "@tscircuit/schematic-trace-solver": "^0.0.41",

tests/components/primitive-components/trace-pcb-path-thickness-with-empty-array.test.tsx

@@ -0,0 +1,41 @@
+import { test, expect } from "bun:test"
+import { getTestFixture } from "tests/fixtures/get-test-fixture"
+
+test("trace pcbPath selectors can set thickness", async () => {
+  const { circuit } = getTestFixture()
+
+  circuit.add(
+    <board width="10mm" height="10mm">
+      <resistor
+        name="R1"
+        resistance="10k"
+        footprint="0402"
+        pcbX={-3}
+        pcbY={0}
+      />
+      <resistor name="R2" resistance="10k" footprint="0402" pcbX={3} pcbY={0} />
+      <trace
+        from=".R1 > .pin2"
+        to=".R2 > .pin1"
+        pcbPathRelativeTo=".R1 > .pin2"
+        pcbPath={[]}
+        thickness="0.5mm"
+      />
+    </board>,
+  )
+
+  await circuit.renderUntilSettled()
+
+  const pcbTrace = circuit.db.pcb_trace.list()[0]
+  expect(pcbTrace).toBeDefined()
+  if (!pcbTrace) throw new Error("Expected trace to be routed")
+  expect(
+    pcbTrace.route
+      .filter((segment) => segment.route_type === "wire")
+      .every((segment) => segment.width === 0.5),
+  ).toBe(true)
+
+  await expect(circuit).toMatchPcbSnapshot(
+    `${import.meta.path}-selectors-thickness`,
+  )
+})

tests/components/primitive-components/trace-width-alias.test.tsx

@@ -0,0 +1,38 @@
+import { test, expect } from "bun:test"
+import { getTestFixture } from "tests/fixtures/get-test-fixture"
+
+test("trace width prop works as alias for thickness", async () => {
+  const { circuit } = getTestFixture()
+
+  circuit.add(
+    <board width="10mm" height="10mm">
+      <resistor
+        name="R1"
+        resistance="10k"
+        footprint="0402"
+        pcbX={-3}
+        pcbY={0}
+      />
+      <resistor name="R2" resistance="10k" footprint="0402" pcbX={3} pcbY={0} />
+      <trace
+        from=".R1 > .pin2"
+        to=".R2 > .pin1"
+        pcbPath={[]}
+        {...({ width: "0.5mm" } as any)}
+      />
+    </board>,
+  )
+
+  await circuit.renderUntilSettled()
+
+  const pcbTrace = circuit.db.pcb_trace.list()[0]
+  expect(pcbTrace).toBeDefined()
+  if (!pcbTrace) throw new Error("Expected trace to be routed")
+  expect(
+    pcbTrace.route
+      .filter((segment) => segment.route_type === "wire")
+      .every((segment) => segment.width === 0.5),
+  ).toBe(true)
+
+  await expect(circuit).toMatchPcbSnapshot(import.meta.path)
+})