CADFileFormat

CADFileFormat is the format selector consumed by ShapeLoader. It is a String-backed, Sendable enum with one case per supported CAD/vector format and an initializer that maps a file extension to a case.

Topics

• Cases · CADFileFormat.init?(fileExtension:)

Cases

public enum CADFileFormat: String, Sendable {
    case step
    case stl
    case obj
    case brep
    case iges
    /// JWW (Jw_cad) — a 2D vector drawing; loaded as a compound of OCCT edges (no B-Rep solid).
    case jww
}

step, stl, obj, brep, iges load to OCCT Shapes; jww loads to a compound of OCCT edges in the Z = 0 plane.

CADFileFormat.init?(fileExtension:)

Maps a file extension (case-insensitive, no leading dot) to a format case, returning nil for an unrecognised extension.

public init?(fileExtension ext: String)

• Parameters: ext — a path extension such as "step", "STP", "iges".
• Returns: the matching CADFileFormat, or nil if the extension isn’t recognised.
• Recognised extensions: step/stp → .step, stl → .stl, obj → .obj, brep/brp → .brep, iges/igs → .iges, jww → .jww.
• Example:

  let url = URL(fileURLWithPath: "part.STP")
  guard let format = CADFileFormat(fileExtension: url.pathExtension) else { return }
  let result = try await ShapeLoader.load(from: url, format: format)