Importing from IGES 3D

You can import data from a disk-based IGES 3D file.

Before you begin:
  • Select the required options for IGES.

    For more information about their behavior, read the IGES 3D Concepts.

  • Check the standards you are using: The IGES standards 5.2 and 5.3 are supported. The latter is year 2000-compliant.
    Tip: The IGES standard 5.3 is downloadable from http://www.uspro.org/documents/.
Import the IGES3D ( *.igs) file as explained in Import.

IGES files must contain only ASCII 1-byte characters.

  • A progress bar is displayed while the content is converted and saved. If the save operation fails, a failure message is displayed and the import is aborted.
  • See About Reports for more information about result check.
  • A product structure with eventually several sub-products, and at least one 3D shape representation containing the data imported is created. See About Structures.
  • The quality of imported data is checked, and a geometry quality enhancement is performed according to the corresponding customizing option. See About Geometry Quality Enhancement.
  • The tolerance used is the default tolerance defined in Part Design.
  • Properties such as the original colors, the show status, names (if they exist) are maintained in your session.
  • Solids and volumes are imported as joined shells.
  • Texts, annotations and 2D geometry are not converted.
  • Other entities are imported as follows:
IGES Dassault SystèmesNotes
null 0-
circular arc 100circle Parametric definition of circle is not supported.
composite curve 102curve, line, circle -
conic arc - ellipse 104 form 1 curve-
copious data 106 forms 1-3 cloud of points The generic display name of such elements can be Geometrical Element.
106 forms 11-13, 63 curve (polyline)
unbounded plane 108 form 0 plane
  • Independent planes 108 form 0 are imported.
  • Independent planes 108 form 0 are displayed as a small square.
bounded plane 108 form 1 plane-
line 110 form 0 line-
semi-bounded line 110 form 1 line-
unbounded line 110 form 2 line-
parametric spline curve 112curve-
parametric spline surface 114surface -
point 116point -
ruled suface 118surface-
surface of revolution 120surface-
tabulated cylinder 122surface-
direction entity 123direction -
transformation matrix 124matrix -
rational B-spline curve 126curve-
rational B-spline surface 128surfaceRational B-spline surfaces are also recognized as planes or cylinder according to their geometrical properties.
offset curve 130curve, line, circle-
offset surface 140surface-
boundary (of skin) 141Either included in the translation of a bounded surface, or curve, line, circle if the transfer of the bounded surface has failed.
  • If the surface is not of type BSpline and C2 continuous, only the Geometry type curves "Curve on a parametric surface" and "Boundary" are taken into account for face creation.
  • 2D Parametric type curves are ignored.
curve on parametric surface 142
bounded surface (of skin) 143surface-
trimmed (parametric) surface 144surface-
manifold solid B-rep (consisting of shell face loop edge list vertex list) 186 form 0 (514 form 1 510 form 1 508 form 1 504 form 1 502 form 1) joined shell For each shell, a geometrical set or a partbody (if the shell is closed) is created.
plane surface entity 190 form 0-1 -All the surfaces are faces support surfaces:
  • They must be used with entities of type 143, 144 and 510.
  • Those surfaces are infinite (not limited).
  • If a face supported by one of those surfaces cannot be correctly imported, the created "invalid Face" and containing surfaces and curves can present visualization problems on infinite surfaces graphic representation.
right circular cylindrical surface entity 192 form 0-1 -
right circular conical surface entity 194 form 0-1 -
toroidal surface entity 198 form 0-1 -
subfigure definition (detail) 308see singular subfigure instance See About Structures.
color definition 314color -
associativity instance (group) 402 forms 1,7,14,15 selection set or 3D shape representations See About groups, Selections Sets and Layers.
singular subfigure instance (ditto) 408simple elements or instances of reference See About the Structures.