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 +1,69 @@
+import type { FloorplanGeometry, GeometryContext } from '@pascal-app/core'
+import { INCHES_TO_METERS } from '../duct-segment/geometry'
+import { getDuctFittingPorts } from './ports'
+import type { DuctFittingNode } from './schema'
+
+const SUPPLY_COLOR = '#d4825a'
+const RETURN_COLOR = '#5a8ad4'
+const BODY_COLOR = '#9ca3af'
+
+/**
+ * Floor-plan symbol for a duct fitting: one stub line per port from the
+ * junction center out to the collar (drawn at each collar's real
+ * diameter), plus a junction circle. Ports are computed in level-local
+ * 3D and projected to plan, so a rotated or riser-turned fitting shows
+ * its true plan footprint; a vertical port collapses onto the junction
+ * circle, which is exactly how it should read from above.
+ */
+export function buildDuctFittingFloorplan(
+  node: DuctFittingNode,
+  ctx: GeometryContext,
+): FloorplanGeometry | null {
+  const [cx, , cz] = node.position
+  const ports = getDuctFittingPorts(node)
+  const view = ctx.viewState
+  const palette = view?.palette
+  const showSelectedChrome = (view?.selected || view?.highlighted) ?? false
+  const accent = node.system === 'supply' ? SUPPLY_COLOR : RETURN_COLOR
+  const bodyStroke = showSelectedChrome && palette ? palette.selectedStroke : BODY_COLOR
+
+  const children: FloorplanGeometry[] = []
+  for (const port of ports) {
+    const px = port.position[0]
+    const pz = port.position[2]
+    // Vertical port — projects onto the junction itself; skip the stub.
+    if (Math.hypot(px - cx, pz - cz) < 1e-4) continue
+    children.push({
+      kind: 'line',
+      x1: cx,
+      y1: cz,
+      x2: px,
+      y2: pz,
+      stroke: bodyStroke,
+      strokeWidth: port.diameter * INCHES_TO_METERS,
+      strokeLinecap: 'round',
+      opacity: showSelectedChrome ? 0.95 : 0.8,
+    })
+  }
+
+  children.push({
+    kind: 'circle',
+    cx,
+    cy: cz,
+    r: (node.diameter * INCHES_TO_METERS) / 2 + 0.015,
+    fill: bodyStroke,
+    stroke: accent,
+    strokeWidth: 1.5,
+    vectorEffect: 'non-scaling-stroke',
+    opacity: 0.95,
+  })
+
+  if (showSelectedChrome) {
+    children.push({
+      kind: 'move-handle',
+      point: [cx, cz],
+    })
+  }
+
+  return { kind: 'group', children }
+}