2D-Plan-Renderer auf WebGL2 (GPU) + akkumulierter Funktionsstand

Neuer GPU-Renderer fuer den Grundriss (src/plan/glPlan/): Earcut-Tessellierung
(konkav-faehig), gehrte Linienzuege (Miter), echte Papier-mm-Strichbreiten im
Massstab (repliziert den SVG-printStrokeVb-Pfad), Hybrid mit scharfem SVG-Text-
Overlay. GPU ist der Standardpfad; der SVG-Renderer bleibt automatischer Fallback,
falls WebGL2/Shader nicht verfuegbar sind. Imperativer Pan (rAF + CSS-transform)
fuer fluessige Interaktion ohne React-Re-Render je Frame.

Enthaelt zudem den bisher nicht committeten Arbeitsstand des Browser-BIM
(Oeffnungen, Treppen, Raeume, Decken, DXF-Export, Materialbibliothek, Kontext-
Import, Tauri-Compute-Boundary-PoC).

public/assets/materials/manifest.json

@@ -0,0 +1,147 @@
+{
+  "source": "ambientCG (ambientcg.com)",
+  "license": "CC0 1.0 Universal (Public Domain)",
+  "resolution": "1K",
+  "materials": [
+    {
+      "id": "Concrete048",
+      "name": "Beton",
+      "category": "Concrete",
+      "maps": {
+        "color": "/assets/materials/Concrete048/color.jpg",
+        "normal": "/assets/materials/Concrete048/normal.jpg",
+        "roughness": "/assets/materials/Concrete048/roughness.jpg",
+        "displacement": "/assets/materials/Concrete048/displacement.jpg",
+        "ao": "/assets/materials/Concrete048/ao.jpg"
+      }
+    },
+    {
+      "id": "Plaster001",
+      "name": "Putz/Stuck",
+      "category": "Plaster",
+      "maps": {
+        "color": "/assets/materials/Plaster001/color.jpg",
+        "normal": "/assets/materials/Plaster001/normal.jpg",
+        "roughness": "/assets/materials/Plaster001/roughness.jpg",
+        "displacement": "/assets/materials/Plaster001/displacement.jpg"
+      }
+    },
+    {
+      "id": "Wood095",
+      "name": "Holz-Diele",
+      "category": "Wood",
+      "maps": {
+        "color": "/assets/materials/Wood095/color.jpg",
+        "normal": "/assets/materials/Wood095/normal.jpg",
+        "roughness": "/assets/materials/Wood095/roughness.jpg",
+        "displacement": "/assets/materials/Wood095/displacement.jpg"
+      }
+    },
+    {
+      "id": "WoodFloor051",
+      "name": "Holz-Parkett",
+      "category": "WoodFloor",
+      "maps": {
+        "color": "/assets/materials/WoodFloor051/color.jpg",
+        "normal": "/assets/materials/WoodFloor051/normal.jpg",
+        "roughness": "/assets/materials/WoodFloor051/roughness.jpg",
+        "displacement": "/assets/materials/WoodFloor051/displacement.jpg",
+        "ao": "/assets/materials/WoodFloor051/ao.jpg"
+      }
+    },
+    {
+      "id": "Bricks104",
+      "name": "Backstein",
+      "category": "Bricks",
+      "maps": {
+        "color": "/assets/materials/Bricks104/color.jpg",
+        "normal": "/assets/materials/Bricks104/normal.jpg",
+        "roughness": "/assets/materials/Bricks104/roughness.jpg",
+        "displacement": "/assets/materials/Bricks104/displacement.jpg",
+        "ao": "/assets/materials/Bricks104/ao.jpg"
+      }
+    },
+    {
+      "id": "Tiles141",
+      "name": "Bodenfliesen",
+      "category": "Tiles",
+      "maps": {
+        "color": "/assets/materials/Tiles141/color.jpg",
+        "normal": "/assets/materials/Tiles141/normal.jpg",
+        "roughness": "/assets/materials/Tiles141/roughness.jpg",
+        "displacement": "/assets/materials/Tiles141/displacement.jpg"
+      }
+    },
+    {
+      "id": "Marble012",
+      "name": "Naturstein/Marmor",
+      "category": "Marble",
+      "maps": {
+        "color": "/assets/materials/Marble012/color.jpg",
+        "normal": "/assets/materials/Marble012/normal.jpg",
+        "roughness": "/assets/materials/Marble012/roughness.jpg",
+        "displacement": "/assets/materials/Marble012/displacement.jpg"
+      }
+    },
+    {
+      "id": "PavingStones150",
+      "name": "Pflasterstein",
+      "category": "PavingStones",
+      "maps": {
+        "color": "/assets/materials/PavingStones150/color.jpg",
+        "normal": "/assets/materials/PavingStones150/normal.jpg",
+        "roughness": "/assets/materials/PavingStones150/roughness.jpg",
+        "displacement": "/assets/materials/PavingStones150/displacement.jpg",
+        "ao": "/assets/materials/PavingStones150/ao.jpg"
+      }
+    },
+    {
+      "id": "Metal063",
+      "name": "Metall",
+      "category": "Metal",
+      "maps": {
+        "color": "/assets/materials/Metal063/color.jpg",
+        "normal": "/assets/materials/Metal063/normal.jpg",
+        "roughness": "/assets/materials/Metal063/roughness.jpg",
+        "metalness": "/assets/materials/Metal063/metalness.jpg",
+        "displacement": "/assets/materials/Metal063/displacement.jpg"
+      }
+    },
+    {
+      "id": "Gravel043",
+      "name": "Kies/Schotter",
+      "category": "Gravel",
+      "maps": {
+        "color": "/assets/materials/Gravel043/color.jpg",
+        "normal": "/assets/materials/Gravel043/normal.jpg",
+        "roughness": "/assets/materials/Gravel043/roughness.jpg",
+        "displacement": "/assets/materials/Gravel043/displacement.jpg",
+        "ao": "/assets/materials/Gravel043/ao.jpg"
+      }
+    },
+    {
+      "id": "Grass005",
+      "name": "Gras",
+      "category": "Grass",
+      "maps": {
+        "color": "/assets/materials/Grass005/color.jpg",
+        "normal": "/assets/materials/Grass005/normal.jpg",
+        "roughness": "/assets/materials/Grass005/roughness.jpg",
+        "displacement": "/assets/materials/Grass005/displacement.jpg",
+        "ao": "/assets/materials/Grass005/ao.jpg"
+      }
+    },
+    {
+      "id": "Ground103",
+      "name": "Boden",
+      "category": "Ground",
+      "maps": {
+        "color": "/assets/materials/Ground103/color.jpg",
+        "normal": "/assets/materials/Ground103/normal.jpg",
+        "roughness": "/assets/materials/Ground103/roughness.jpg",
+        "displacement": "/assets/materials/Ground103/displacement.jpg",
+        "ao": "/assets/materials/Ground103/ao.jpg"
+      }
+    }
+  ]
+}