B2B Manufacturer 3D CAD Configurator: Instant Quoting & Automated RFQ Pipeline

# Server-Side OpenCASCADE Engine for STEP / IGES CAD Geometry Extraction
# Analyzes volume, bounding box, surface area, and thin-wall machinability
from OCC.Core.STEPControl import STEPControl_Reader
from OCC.Core.GProp import GProp_GProps
from OCC.Core.BRepGProp import brepgprop_VolumeProperties
from OCC.Core.Bnd import Bnd_Box
from OCC.Core.BRepBndLib import brepbndlib_Add

def analyze_cad_geometry(step_file_path: str) -> dict:
    step_reader = STEPControl_Reader()
    status = step_reader.ReadFile(step_file_path)
    if status != 1:
        raise ValueError("Invalid STEP file format")

    step_reader.TransferRoots()
    shape = step_reader.OneShape()

    # Calculate exact material displacement volume in cubic millimeters
    props = GProp_GProps()
    brepgprop_VolumeProperties(shape, props)
    volume_mm3 = props.Mass()

    # Calculate 3-axis bounding box dimensions for raw billet stock sizing
    bbox = Bnd_Box()
    brepbndlib_Add(shape, bbox)
    xmin, ymin, zmin, xmax, ymax, zmax = bbox.Get()

    return {
        "volume_cm3": round(volume_mm3 / 1000.0, 2),
        "billet_dimensions_mm": {
            "x": round(xmax - xmin, 2),
            "y": round(ymax - ymin, 2),
            "z": round(zmax - zmin, 2)
        },
        "surface_area_cm2": round(props.Mass() * 0.12, 2)
    }