cad-to-data

The saved excerpt is a snapshot from review. The external source remains the complete and most current version.

---
name: "cad-to-data"
description: "Convert CAD/BIM files to structured data. Extract element data from Revit, IFC, DWG, DGN files."
homepage: "https://datadrivenconstruction.io"
metadata: {"openclaw":{"emoji":"🗂️","os":["darwin","linux","win32"],"homepage":"https://datadrivenconstruction.io","requires":{"bins":["python3"]}}}
---

# CAD To Data

## Overview

Based on DDC methodology (Chapter 2.4), this skill converts CAD and BIM files to structured data, extracting element properties, quantities, and relationships from Revit, IFC, DWG, and DGN files.

**Book Reference:** "Преобразование данных в структурированную форму" / "Data Transformation to Structured Form"

## Quick Start

```python
from dataclasses import dataclass, field
from enum import Enum
from typing import List, Dict, Optional, Any, Tuple, Generator
from datetime import datetime
import json

class CADFormat(Enum):
    """Supported CAD/BIM formats"""
    IFC = "ifc"
    RVT = "rvt"
    DWG = "dwg"
    DXF = "dxf"
    DGN = "dgn"
    NWD = "nwd"
    STEP = "step"

class ElementCategory(Enum):
    """BIM element categories"""
    WALL = "wall"
    FLOOR = "floor"
    ROOF = "roof"
    CEILING = "ceiling"
    DOOR = "door"
    WINDOW = "window"
    COLUMN = "column"
    BEAM = "beam"
    STAIR = "stair"
    RAMP = "ramp"
    FURNITURE = "furniture"
    EQUIPMENT = "equipment"
    PIPE = "pipe"
    DUCT = "duct"
    CABLE_TRAY = "cable_tray"
    SPACE = "space"
    GENERIC = "generic"

@dataclass
class Point3D:
    """3D point"""
    x: float
    y: float
    z: float

@dataclass
class BoundingBox3D:
    """3D bounding box"""
    min_point: Point3D
    max_point: Point3D

    @property
    def width(self) -> float:
        return abs(self.max_point.x - self.min_point.x)

    @property
    def depth(self) -> float:
        return abs(self.max_point.y - self.min_point.y)

    @property
    def height(self) -> float:
        return abs(self.max_point.z - self.min_point.z)

    @property
    def volume(self) -> float:
        return self.width * self.depth * self.height

@dataclass
class MaterialInfo:
    """Material information"""
    name: str
    category: str
    color: Optional[str] = None
    area: float = 0.0
    volume: float = 0.0
    properties: Dict[str, Any] = field(default_factory=dict)

@dataclass
class CADElement:
    """Extracted CAD/BIM element"""
    id: str
    guid: str
    name: str
    category: ElementCategory
    type_name: str
    level: Optional[str] = None
    bounding_box: Optional[BoundingBox3D] = None
    properties: Dict[str, Any] = field(default_factory=dict)
    quantities: Dict[str, float] = field(default_factory=dict)
    materials: List[MaterialInfo] = field(default_factory=list)
    relationships: Dict[str, List[str]] = field(default_factory=dict)

@dataclass
class CADLayer:
    """CAD layer information"""
    name: str
    color: Optional[str] = None
    line_type: Optional[str] = None
    visible: bool = True
    element_count: int = 0

@dataclass
class CADExtractionResult:
    """Result of CAD extraction"""
    file_path: str
    file_format: CADFormat
    elements: List[CADElement]
    layers: List[CADLayer]
    levels: List[str]
    total_elements: int
    categories: Dict[str, int]
    extraction_time: float
    metadata: Dict[str, Any] = field(default_factory=dict)


class IFCExtractor:
    """Extract data from IFC files"""

    def __init__(self):
        self.schema_version = "IFC4"
        self.element_mapping = self._build_element_mapping()

    def _build_element_mapping(self) -> Dict[str, ElementCategory]:
        """Map IFC types to categories"""
        return {
            "IfcWall": ElementCategory.WALL,
            "IfcWallStandardCase": ElementCategory.WALL,
            "IfcSlab": ElementCategory.FLOOR,
            "IfcRoof": ElementCategory.ROOF,
            "IfcCeiling": ElementCategory.CEILING,
            "IfcDoor": ElementCategory.DOOR,
            "IfcWindow": ElementCategory.WINDOW,
            "IfcColumn":