IGES Reader

The IGES Reader provides full access to the B-rep and View Data stored within a particular IGES file. A file does not need to have a particular extension to be read correctly by HOOPS Exchange however the file extensions of IGES files that you can expect to be loaded by HOOPS Exchange are:

.IGES
.IGS

Assembly

The full assembly tree definition is provided however referenced files are not currently supported. Incremental load is not supported by our IGES reader.

B-Rep

The list of supported surface types:

Plane surface
Ruled surface
Rational b-spline surface
Bounded surface
Parametric spline surface
Surface of revolution
Offset surface
Trimmed surface
Right circular cylindrical surface
Right circular conical surface
Spherical surface
Toroidal surface

The list of supported curve types:

Circular arc
Rational b-spline curve
Line
Curve on a parametric surface
Copius data
Offset curve
Parametric spline curve
Composite curve

Visualization

This visualization data for this format is generated by the HOOPS Exchange tessellation engine.

Views

Views are supported, however, authoring applications very rarely export IGES data with views.

PMI

This concept is not supported by IGES.

Miscellaneous

Our IGES reader does significant effort to correct problems with corrupt or poorly defined data. Some of the things done here include fixing basic problems with corrupt files, correcting orientation problems, closing open loops and adjusting vertex tolerances. The A3DAsmModelFileSew() function is available to developers who want all surfaces which share a common edge to be joined together.

Import Options Specific to IGES

None

Limitations

Group associativity is not supported (IGES Type 402).