From 64f61797d8cdf892981d9a14a84e97ed166ada7f Mon Sep 17 00:00:00 2001
From: Karim <karim@gabrielevarano.ch>
Date: Fri, 10 Jul 2026 00:35:26 +0200
Subject: [PATCH] =?UTF-8?q?Dach:=20Auswahl-Hervorhebung=20auch=20im=203D?=
 =?UTF-8?q?=20(Draht-Umriss=20der=20Dachfl=C3=A4chen)?=
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selectionHighlightLines bekommt roofIds und emittiert die Kanten aller
Dachflächen + Giebel (roofGeometry, Modell→World) als Akzent-Draht — ein
selektiertes Dach leuchtet jetzt im wgpu-Viewport wie Wand/Decke. App reicht
selectedRoofIds durch. +1 Test. tsc + vitest grün.
---
 src/App.tsx                |  5 ++++-
 src/plan/toWalls3d.test.ts |  9 +++++++++
 src/plan/toWalls3d.ts      | 23 ++++++++++++++++++++++-
 3 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/src/App.tsx b/src/App.tsx
index 5c10c18..d301df8 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -5984,7 +5984,8 @@ function Content({
       selectedWallIds.length === 0 &&
       selectedCeilingIds.length === 0 &&
       selectedOpeningIds.length === 0 &&
-      selectedStairIds.length === 0
+      selectedStairIds.length === 0 &&
+      selectedRoofIds.length === 0
         ? null
         : selectionHighlightLines(
             project,
@@ -5993,6 +5994,7 @@ function Content({
             HIGHLIGHT_RGB,
             selectedOpeningIds,
             selectedStairIds,
+            selectedRoofIds,
           ),
     [
       project,
@@ -6000,6 +6002,7 @@ function Content({
       selectedCeilingIds,
       selectedOpeningIds,
       selectedStairIds,
+      selectedRoofIds,
     ],
   );
 
diff --git a/src/plan/toWalls3d.test.ts b/src/plan/toWalls3d.test.ts
index a067b26..011cb28 100644
--- a/src/plan/toWalls3d.test.ts
+++ b/src/plan/toWalls3d.test.ts
@@ -27,6 +27,15 @@ describe("selectionHighlightLines", () => {
     expect(lines.length).toBe(0);
   });
 
+  it("ein Dach -> Draht-Kanten der Dachflächen/Giebel (nicht leer, mit Farbe)", () => {
+    // sampleProject enthält das Demo-Satteldach RF1.
+    const lines = selectionHighlightLines(sampleProject, [], [], RGB, [], [], ["RF1"]);
+    expect(lines.length).toBeGreaterThan(0);
+    // Farbe in jedem Vertex (erstes Vertex: [px,py,pz,r,g,b]).
+    expect(lines[3]).toBeCloseTo(RGB[0], 6);
+    expect(lines[5]).toBeCloseTo(RGB[2], 6);
+  });
+
   it("eine Wand ohne Öffnungen -> je Materiallage ein Quader, Kern-Band unter der Decke gespalten (5·12 Kanten)", () => {
     // W2 (EG, Ost) trägt keine Tür/kein Fenster im Sample-Projekt (nur W1/W3
     // haben Öffnungen, s. sampleProject.ts) -> ein Achsen-Teilquader. Wandtyp
diff --git a/src/plan/toWalls3d.ts b/src/plan/toWalls3d.ts
index b5239fa..bc8c644 100644
--- a/src/plan/toWalls3d.ts
+++ b/src/plan/toWalls3d.ts
@@ -2254,12 +2254,14 @@ export function selectionHighlightLines(
   rgb: RRgb,
   openingIds: string[] = [],
   stairIds: string[] = [],
+  roofIds: string[] = [],
 ): Float32Array {
   if (
     wallIds.length === 0 &&
     ceilingIds.length === 0 &&
     openingIds.length === 0 &&
-    stairIds.length === 0
+    stairIds.length === 0 &&
+    roofIds.length === 0
   ) {
     return new Float32Array(0);
   }
@@ -2268,6 +2270,7 @@ export function selectionHighlightLines(
   const ceilingSet = new Set(ceilingIds);
   const openingSet = new Set(openingIds);
   const stairSet = new Set(stairIds);
+  const roofSet = new Set(roofIds);
   const out: number[] = [];
   const pushEdge = (a: RVec3, b: RVec3) => {
     out.push(a[0], a[1], a[2], rgb[0], rgb[1], rgb[2]);
@@ -2332,5 +2335,23 @@ export function selectionHighlightLines(
   for (const o of openings) if (openingSet.has(o.openingId)) boxEdges(o);
   for (const s of slabs) if (ceilingSet.has(s.ceilingId)) prismEdges(s.outline, s.zBottom, s.zTop);
   for (const st of stairs) if (stairSet.has(st.stairId)) prismEdges(st.outline, st.zBottom, st.zTop);
+  // Dach: die Kanten aller Dachflächen + Giebel als Draht-Umriss (roofGeometry
+  // liefert 3D-Polygone in MODELL-Koordinaten [x, y, z=Höhe]; world = [x, z, y]).
+  if (roofSet.size > 0) {
+    for (const roof of project.roofs ?? []) {
+      if (!roofSet.has(roof.id)) continue;
+      const g = roofGeometry(roof, roofBaseElevation(project, roof));
+      const polyEdges = (pts: readonly (readonly [number, number, number])[]) => {
+        const m = pts.length;
+        for (let i = 0, j = m - 1; i < m; j = i++) {
+          const a = pts[j];
+          const b = pts[i];
+          pushEdge([a[0], a[2], a[1]], [b[0], b[2], b[1]]);
+        }
+      };
+      for (const pl of g.planes) polyEdges(pl.pts);
+      for (const gab of g.gables) polyEdges(gab);
+    }
+  }
   return new Float32Array(out);
 }