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DXF-Import: Polyface-Mesh-Faces (POLYLINE) wurden nie erkannt — swissBUILDINGS3D-Gebäude blieben leer

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Root Cause für „Gebäude-Import funktioniert nicht": Die installierte
dxf-parser-Version liefert Face-Vertex-Indizes NICHT als `faces`-Array,
sondern als vier einzelne Felder (Gruppencodes 71–74: faceA/faceB/faceC/
faceD). Unser addPolyfaceMesh/isMeshPolyline prüfte auf ein `faces`-Array,
das in dieser Version nie existiert — jede POLYLINE-Polyface-Mesh (exakt das
Format der swissBUILDINGS3D-DXF-Kacheln) ergab dadurch 0 Dreiecke, obwohl
Positionen geschrieben wurden. Live gegen echte swissBUILDINGS3D-Kacheln
verifiziert: vorher 0 Meshes, jetzt tausende Dreiecke mit realistischen
Schweizer Höhenwerten. +3 Tests (rohes DXF, nicht gemockt, deckt auch die
zugrundeliegende Bibliothek ab), Suite 794 grün.
This commit is contained in:
Karim
2026-07-12 19:22:53 +02:00
parent 35a6834072
commit 9705890fd2
2 changed files with 88 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/io/dxfParser.test.ts
+62
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@@ -537,3 +537,65 @@ describe("contoursToDrawings — HATCH-Füllung", () => {
expect(d.fillColor).toBeUndefined();
});
});
describe("parseDxf — Polyface-Mesh (POLYLINE Flag 64, swissBUILDINGS3D-Format)", () => {
// Regression: die installierte dxf-parser-Version liefert Face-Vertex-
// Indizes NICHT als `faces`-Array, sondern als vier einzelne Felder
// (Gruppencodes 71–74, faceA..faceD) — reale swissBUILDINGS3D-DXF-Kacheln
// ergaben dadurch 0 Dreiecke (Nutzer-Report „Gebäude-Import funktioniert
// nicht"). Rohes DXF (keine gemockte Entity-Form), damit auch die
// zugrundeliegende Bibliothek mitgeprüft wird.
it("ein Dreieck (3 Geometrie-Vertices + 1 Face-Record) ergibt genau 1 Dreieck", () => {
const lines = [
"0", "SECTION", "2", "ENTITIES",
"0", "POLYLINE", "8", "0", "70", "64",
"0", "VERTEX", "8", "0", "70", "192", "10", "0.0", "20", "0.0", "30", "0.0",
"0", "VERTEX", "8", "0", "70", "192", "10", "1.0", "20", "0.0", "30", "0.0",
"0", "VERTEX", "8", "0", "70", "192", "10", "0.0", "20", "1.0", "30", "0.0",
"0", "VERTEX", "8", "0", "70", "128", "10", "0.0", "20", "0.0", "30", "0.0",
"71", "1", "72", "2", "73", "3",
"0", "SEQEND",
"0", "ENDSEC", "0", "EOF",
];
const res = parseDxf(lines.join("\n"));
expect(res.meshes).toHaveLength(1);
expect(res.meshes[0].positions.length / 3).toBe(3);
expect(res.meshes[0].indices).toEqual([0, 1, 2]);
});
it("ein Viereck (4 Geometrie-Vertices + 1 Face-Record mit faceD) ergibt 2 Dreiecke (Fan)", () => {
const lines = [
"0", "SECTION", "2", "ENTITIES",
"0", "POLYLINE", "8", "0", "70", "64",
"0", "VERTEX", "8", "0", "70", "192", "10", "0.0", "20", "0.0", "30", "0.0",
"0", "VERTEX", "8", "0", "70", "192", "10", "1.0", "20", "0.0", "30", "0.0",
"0", "VERTEX", "8", "0", "70", "192", "10", "1.0", "20", "1.0", "30", "0.0",
"0", "VERTEX", "8", "0", "70", "192", "10", "0.0", "20", "1.0", "30", "0.0",
"0", "VERTEX", "8", "0", "70", "128", "10", "0.0", "20", "0.0", "30", "0.0",
"71", "1", "72", "2", "73", "3", "74", "4",
"0", "SEQEND",
"0", "ENDSEC", "0", "EOF",
];
const res = parseDxf(lines.join("\n"));
expect(res.meshes).toHaveLength(1);
expect(res.meshes[0].positions.length / 3).toBe(4);
expect(res.meshes[0].indices.length / 3).toBe(2);
});
it("negative (unsichtbare-Kante) Face-Indizes werden per abs() aufgelöst", () => {
const lines = [
"0", "SECTION", "2", "ENTITIES",
"0", "POLYLINE", "8", "0", "70", "64",
"0", "VERTEX", "8", "0", "70", "192", "10", "0.0", "20", "0.0", "30", "0.0",
"0", "VERTEX", "8", "0", "70", "192", "10", "1.0", "20", "0.0", "30", "0.0",
"0", "VERTEX", "8", "0", "70", "192", "10", "0.0", "20", "1.0", "30", "0.0",
"0", "VERTEX", "8", "0", "70", "128", "10", "0.0", "20", "0.0", "30", "0.0",
"71", "1", "72", "-2", "73", "3",
"0", "SEQEND",
"0", "ENDSEC", "0", "EOF",
];
const res = parseDxf(lines.join("\n"));
expect(res.meshes).toHaveLength(1);
expect(res.meshes[0].indices).toEqual([0, 1, 2]);
});
});