feat: HVAC ductwork + DWV plumbing systems (#402)

Adds two new MEP node families (HVAC ductwork, DWV plumbing) built on a shared port-connectivity model. Co-authored by @sudhir9297.
2026-06-16 15:30:39 -04:00
parent a0d3d9c701
commit 5551500d98
172 changed files with 17361 additions and 150 deletions
@@ -0,0 +1,77 @@
+import type { FloorplanGeometry, FloorplanPoint, GeometryContext } from '@pascal-app/core'
+import { INCHES_TO_METERS } from '../duct-segment/geometry'
+import type { LiquidLineNode } from './schema'
+
+const COPPER_LINE = '#b06b3f'
+
+/**
+ * Floor-plan representation of a liquid line: a single thin copper polyline at
+ * the line's real width. Vertical risers collapse to a point in plan;
+ * consecutive duplicate plan points are dropped so they don't render
+ * zero-length artifacts.
+ */
+export function buildLiquidLineFloorplan(
+  node: LiquidLineNode,
+  ctx: GeometryContext,
+): FloorplanGeometry | null {
+  if (node.path.length < 2) return null
+
+  const points: FloorplanPoint[] = []
+  // Plan point k ← original path index indexMap[k] (risers collapse to one
+  // plan point), so the path-point drag handle edits the right vertex.
+  const indexMap: number[] = []
+  for (let i = 0; i < node.path.length; i++) {
+    const [x, , z] = node.path[i]!
+    const prev = points[points.length - 1]
+    if (prev && Math.abs(prev[0] - x) < 1e-6 && Math.abs(prev[1] - z) < 1e-6) continue
+    points.push([x, z])
+    indexMap.push(i)
+  }
+
+  const widthM = node.diameter * INCHES_TO_METERS
+  const view = ctx.viewState
+  const palette = view?.palette
+  const showSelectedChrome = (view?.selected || view?.highlighted) ?? false
+
+  if (points.length < 2) {
+    const p = points[0] ?? [node.path[0]![0], node.path[0]![2]]
+    return {
+      kind: 'circle',
+      cx: p[0],
+      cy: p[1],
+      r: Math.max(widthM, 0.02),
+      fill: COPPER_LINE,
+      stroke: showSelectedChrome && palette ? palette.selectedStroke : COPPER_LINE,
+      strokeWidth: 0.02,
+      opacity: 0.9,
+    }
+  }
+
+  const children: FloorplanGeometry[] = [
+    {
+      kind: 'polyline',
+      points,
+      stroke: showSelectedChrome && palette ? palette.selectedStroke : COPPER_LINE,
+      strokeWidth: Math.max(widthM * 2, 0.04),
+      strokeLinecap: 'round',
+      strokeLinejoin: 'round',
+      opacity: showSelectedChrome ? 0.95 : 0.85,
+    },
+  ]
+
+  // Selection chrome: one draggable handle per path vertex (2D twin of the
+  // 3D selection handles). Routes to the shared `move-path-point` affordance.
+  if (view?.selected) {
+    for (let k = 0; k < points.length; k++) {
+      children.push({
+        kind: 'endpoint-handle',
+        point: points[k]!,
+        state: 'idle',
+        affordance: 'move-path-point',
+        payload: { pointIndex: indexMap[k]! },
+      })
+    }
+  }
+
+  return { kind: 'group', children }
+}