Update inputs: engineering/2d_drawings_to_3d_building_model/base

tasks/engineering/2d_drawings_to_3d_building_model/base/input/README.md

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+# Betonwerk Katzenberger — 3D Model Construction Task
+
+## Overview
+
+You are given architectural drawings for the **Betonwerk Katzenberger** project — a
+concrete-plant-style mixed-use building in Bavaria, Germany. The building has two
+main parts:
+
+1. **Halle** — a large workshop hall housing prefabricated module assembly
+2. **Hostel/Tower** — a multi-story residential tower attached at one end
+
+Your task: **produce a single 3D model that represents this building's external
+form and internal structural organization at LOD 200–300.**
+
+You are working as if you were the BIM modeler/architect's assistant: read the
+drawings, understand the design intent, and build the 3D geometry.
+
+---
+
+## What You Have (Input Materials)
+
+```
+input/
+├── README.md                          ← you are here
+├── output_contract.json               ← machine-readable spec — read this!
+├── 3D Snapshot.png                    ← rendered preview of the finished building
+├── architectural_drawings/
+│   ├── Diagram.pdf                       conceptual axonometric system diagram
+│   ├── Hall Ground Floor_Layout.pdf      Hall plan at ground level
+│   ├── Hall First Floor_Layout.pdf       Hall plan at mezzanine 1
+│   ├── Hall Second Floor_Layout.pdf      Hall plan at mezzanine 2
+│   ├── Tower_Layout.pdf                  Tower typical floor plan
+│   └── Hostel_ Elevation and Section.pdf Tower elevation views + cross-section
+├── base_model.obj                     ← positioning anchor (see below)
+└── base_model.3dm                     ← same anchor, Rhino native format
+```
+
+### `base_model` — what it is and what it is NOT
+
+`base_model.{obj,3dm}` is **a positioning anchor only**. It contains:
+
+- One closed polyline at z=0 representing the building's outer footprint
+- Three orthogonal axis markers showing +X, +Y, +Z directions
+- A small north-arrow chevron
+
+It does **not** contain walls, slabs, or any architectural geometry. **You must
+build everything yourself from the drawings.**
+
+The reason for this file: to lock down the world coordinate system so the
+evaluator can compare your output against the reference at the same coordinates.
+
+### Coordinate convention (HARD CONSTRAINT)
+
+- Origin `(0, 0, 0)` = SW corner of the building footprint
+- `+X` = East (long axis of building)
+- `+Y` = North (matches north arrow in base_model)
+- `+Z` = Up
+- Units = **millimeters**
+
+**Do not move the origin. Do not rotate the model. Do not change units.**
+The evaluator depends on this coordinate frame.
+
+---
+
+## What You Must Build
+
+Read the PDFs and Snapshot, then construct geometry for these components in
+your 3D file. (Full machine-readable list in `output_contract.json`.)
+
+| # | Component | Notes |
+|---|---|---|
+| 1 | **Hall main volume** | Footprint fits within base_model polyline, height ~11.8 m |
+| 2 | **Hall north wall** | Solid concrete + metal panel cladding |
+| 3 | **Hall south facade** | **Open structural framework — NOT a solid wall.** Steel members only; Hall interior visible through |
+| 4 | **Hall ceiling (Halle_Decke)** | At z ≈ 11820 mm, may be curved/sloped |
+| 5 | **Hall mezzanines** | Three partial floor levels at z ≈ 4030, 6130, 7830 mm |
+| 6 | **3 workshop modules** | Inside Hall, positions per Hall Ground Floor PDF |
+| 7 | **Tower main volume** | NE corner, ~19 × 11 m footprint, extends to z ≈ 36 m |
+| 8 | **Tower floor slabs** | At z ≈ 16037, 20039, 32045, 35847 mm |
+| 9 | **Tower glass curtain wall** | Vertical mullions + glass panels on facades |
+| 10 | **Tower stair core** | Internal vertical circulation shaft |
+| 11 | **Tower metal cap** | Cladding above the curtain wall at the top |
+
+### Components you should NOT model
+
+- Interior furniture (beds, sinks, tables) — these appear in 2D plans only
+- Room labels, dimensions, text annotations
+- Surface decoration (paint, tile patterns)
+- Site context (trees, vehicles, terrain)
+
+---
+
+## Output Requirements
+
+Save to `Desktop/output/`:
+
+```
+output/
+├── model.obj          ← Wavefront OBJ, ASCII, at least 1000 vertices
+└── model.3dm          ← Rhino 5.0 or newer native format
+```
+
+**Both files must contain the same geometry** (the .3dm is for archival/review;
+the .obj is what the evaluator scores).
+
+**Do NOT output `.dwg`** — the evaluator cannot read DWG format.
+
+### Mesh format notes (for .obj)
+
+- ASCII OBJ
+- Axis convention: Y forward, Z up (Blender import:
+  `forward_axis='Y', up_axis='Z'`)
+- Floor slabs must be **horizontal** (face normal |nz| > 0.9) so the auto-floor
+  detector can locate them
+- Multiple `o ` objects are OK — the evaluator joins them before rendering
+
+---
+
+## How You Will Be Evaluated
+
+After you submit, the evaluator will:
+
+1. Load your `model.obj` into Blender
+2. Auto-detect floor elevations from your horizontal slabs
+3. Render 14 canonical views:
+   - **4 plans**: hall_ground, hall_first, hall_second, tower_typical
+   - **4 elevations**: north, south, east, west
+   - **2 sections**: NS, EW (vertical cuts through building centroid)
+   - **4 axonometrics**: NE, NW, SE, SW corners
+4. Compare each view against the reference (silhouette IoU + depth-L1)
+5. Report mean score across all 14 views
+
+The evaluator's source code is straightforward and deterministic. Your job is
+to match the reference geometry, not to second-guess the evaluator.
+
+---
+
+## Tips
+
+- The PDFs include interior detail (room layouts, furniture) that the 3D model
+  does NOT — work at LOD 200–300 (building shell + structural + facades), not
+  LOD 400 (interior fit-out)
+- The 3D Snapshot.png is your form-check reference — your model viewed from a
+  similar angle should look similar
+- The Hall is a wide, low workshop volume; the Tower is a tall narrow residential
+  block. Get the proportions right first.
+- North wall ≠ South wall: north is solid (paneled), south is open (frame only).
+  This is a meaningful design choice — don't make both sides solid.
+- Glass curtain wall has visible mullion grid (vertical posts every ~1.5 m + horizontal
+  divisions per floor). Don't model it as a single flat sheet.
+
+Good luck.

tasks/engineering/2d_drawings_to_3d_building_model/base/input/architectural_drawings/Diagram.pdf

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tasks/engineering/2d_drawings_to_3d_building_model/base/input/architectural_drawings/Hall First Floor_Layout.pdf

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tasks/engineering/2d_drawings_to_3d_building_model/base/input/architectural_drawings/Hall Ground Floor_Layout.pdf

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tasks/engineering/2d_drawings_to_3d_building_model/base/input/architectural_drawings/Hall Second Floor_Layout.pdf

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tasks/engineering/2d_drawings_to_3d_building_model/base/input/architectural_drawings/Hostel_ Elevation and Section.pdf

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tasks/engineering/2d_drawings_to_3d_building_model/base/input/architectural_drawings/Tower_Layout.pdf

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tasks/engineering/2d_drawings_to_3d_building_model/base/input/base_model.3dm

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tasks/engineering/2d_drawings_to_3d_building_model/base/input/base_model.obj

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+# base_model.obj — positioning anchor only
+# Coordinate convention:
+#   +X = building long axis (East per project convention)
+#   +Y = building short axis (North per project convention)
+#   +Z = up
+# Footprint polyline lies at z=0
+o BaseModel
+g Footprint
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+v 58022.000 43100.020 0.000
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+v 4586.000 23189.800 0.000
+v 10227.000 2900.000 0.000
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+v 26041.000 0.000 0.000
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+l 2 3
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+l 4 5
+l 5 6
+l 6 7
+l 7 8
+l 8 9
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+l 11 1
+g Axes
+v 0.000 0.000 0.000
+v 10574.890 0.000 0.000
+v 0.000 10574.890 0.000
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+l 12 15
+g NorthArrow
+v -845.991 9728.899 0.000
+v 0.000 10574.890 0.000
+v 845.991 9728.899 0.000
+l 16 17
+l 17 18

tasks/engineering/2d_drawings_to_3d_building_model/base/input/output_contract.json

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+{
+  "task_id": "betonwerk_katzenberger_3d_model",
+  "contract_version": "v1",
+  "_comment": "Machine-readable spec used by the evaluator. Agent MUST adhere to filenames and coordinate convention or evaluation will fail.",
+
+  "output_dir": "Desktop/output",
+
+  "required_files": [
+    {
+      "filename": "model.obj",
+      "format": "Wavefront OBJ (ASCII)",
+      "min_vertices": 1000,
+      "magic_check": "first non-comment line must begin with 'v ', 'mtllib', or 'o '",
+      "purpose": "Mesh consumed by Blender-based renderer for IoU scoring"
+    },
+    {
+      "filename": "model.3dm",
+      "format": "Rhino 5.0 or newer",
+      "magic_check": "first 4 bytes == '3D Geom File' header (b'3D Ge')",
+      "purpose": "Native CAD format for human review"
+    }
+  ],
+
+  "forbidden_outputs": [
+    {
+      "pattern": "*.dwg",
+      "reason": "Evaluator does not have a DWG reader available; do not produce DWG output."
+    }
+  ],
+
+  "coordinate_system": {
+    "origin": [0, 0, 0],
+    "anchor": "input/base_model.obj defines the SW corner of the building footprint at (0,0,0).",
+    "x_axis": "+X is east (building long axis)",
+    "y_axis": "+Y is north (matches north arrow in base_model)",
+    "z_axis": "+Z is up",
+    "units": "millimeters",
+    "hard_constraint": "Do NOT modify the origin or rotate the model. The evaluator detects floors by Z elevation and renders plans/elevations based on this coordinate frame."
+  },
+
+  "mesh_constraints": {
+    "obj_axis_convention": "Y forward, Z up (matches Blender import flags forward_axis='Y', up_axis='Z')",
+    "must_be_single_mesh_or_joinable": "If model.obj has multiple objects ('o' lines), the evaluator will join them into one mesh before rendering.",
+    "must_have_horizontal_floor_slabs": "The evaluator auto-detects floor elevations from faces with |nz| > 0.9. Floor slabs must be horizontal (not tilted) for detection to work.",
+    "no_textures_required": "Materials and textures are not used in scoring."
+  },
+
+  "required_geometry_components": [
+    {
+      "id": "hall_main_volume",
+      "description": "Main workshop hall body. Footprint should fit within base_model site polyline (approx 58 x 68 m).",
+      "approx_z_range_mm": [0, 11820]
+    },
+    {
+      "id": "hall_north_wall",
+      "description": "Solid wall + metal panel cladding on the north (+Y) face of the Hall. Visible as continuous mass in elevation_north.",
+      "approx_z_range_mm": [0, 11820]
+    },
+    {
+      "id": "hall_south_open_frame",
+      "description": "Open structural framework on the south (-Y) face. NOT a solid wall. Steel members visible through which Hall interior modules can be seen.",
+      "approx_z_range_mm": [0, 11820]
+    },
+    {
+      "id": "hall_ceiling",
+      "description": "Workshop ceiling (Halle_Decke) at approximately z=11820 mm. May be curved/sloped.",
+      "approx_z_range_mm": [11500, 12200]
+    },
+    {
+      "id": "hall_mezzanines",
+      "description": "Three mezzanine floor levels inside the Hall at approximately z = 4030, 6130, 7830 mm.",
+      "approx_z_range_mm": [4000, 8000]
+    },
+    {
+      "id": "hall_workshop_modules",
+      "description": "Three prefabricated workshop module structures inside the Hall ground floor. Positions and orientations shown in Hall Ground Floor PDF.",
+      "approx_z_range_mm": [0, 8000]
+    },
+    {
+      "id": "tower_main_volume",
+      "description": "Tall narrow Tower at the NE end of the building, approximately 19 x 11 m footprint, extending to z ~ 36000 mm.",
+      "approx_z_range_mm": [11820, 36000]
+    },
+    {
+      "id": "tower_floor_slabs",
+      "description": "Tower floor slabs at approximately z = 16037, 20039, 32045, 35847 mm.",
+      "approx_z_range_mm": [16000, 36000]
+    },
+    {
+      "id": "tower_curtain_wall",
+      "description": "Glass curtain wall (Fassade Glas) with mullion grid covering Tower facades. Vertical posts + glass panels.",
+      "approx_z_range_mm": [11820, 36000]
+    },
+    {
+      "id": "tower_stair_core",
+      "description": "Vertical stair shaft inside the Tower, visible as small enclosed space in plan_tower_typical.",
+      "approx_z_range_mm": [0, 36000]
+    },
+    {
+      "id": "tower_top_cap",
+      "description": "Metal cladding cap at the top of the Tower above the curtain wall.",
+      "approx_z_range_mm": [33000, 40000]
+    }
+  ],
+
+  "do_not_model": [
+    "Interior furniture (beds, sinks, tables, chairs) — these appear in 2D plan PDFs only",
+    "Room labels, dimension annotations, or text markers",
+    "Site context: trees, vehicles, terrain beyond the building footprint",
+    "Wall surface finishes (paint patterns, tile, etc.) — surface only, no decoration"
+  ],
+
+  "evaluator_views": {
+    "_comment": "These 14 view names are the canonical filenames the evaluator will render from your model.obj. You don't render them — the evaluator does.",
+    "plans": ["plan_hall_ground", "plan_hall_first", "plan_hall_second", "plan_tower_typical"],
+    "elevations": ["elevation_north", "elevation_south", "elevation_east", "elevation_west"],
+    "sections": ["section_NS", "section_EW"],
+    "axonometrics": ["axon_NE", "axon_NW", "axon_SE", "axon_SW"]
+  },
+
+  "scoring_method": {
+    "type": "silhouette_iou_plus_depth_l1",
+    "per_view_score": "0.6 * silhouette_IoU + 0.4 * depth_L1_match",
+    "aggregation": "mean across all 14 views",
+    "passing_threshold": 0.5,
+    "notes": "Floor heights are auto-detected from your mesh — your slabs do not need to match reference exactly, but you must have a comparable number of distinct floor levels."
+  }
+}