Read IGES for OCCT BRep conversion
A IGES-to-OCCT BRep workflow combines the IGES reader with the OCCT BRep writer. Use it when the receiving application needs OCCT BRep data from an existing IGES model.
Read IGS or IGES geometry with the OCCT IGES interface. Inspect the transferred curves, surfaces and topology before conversion: an IGES model may contain disconnected surfaces or wire geometry rather than a closed solid.
Store imported geometry as native OCCT shapes
For mesh output, tessellate the imported faces and inspect boundaries between adjacent surfaces. Curves alone do not define a surface mesh. For BRep output, determine whether sewing or shape healing is needed before writing the translated geometry.
Write the imported precise shapes using native OCCT BRep storage. This route is useful for retaining translated geometry for subsequent OCCT modeling and analysis. It requires BRep source geometry and does not recover analytic surfaces from a mesh-only representation.
Validate the OCCT BRep result
Check units, surface coverage, open boundaries and tolerances. A successful translation does not establish watertightness or restore product structure that the source IGES file did not contain.
Read the BRep file back with the intended OCCT delivery and compare shape types, tolerances and geometry coverage. A standalone BRep file does not carry the complete XDE assembly and attribute document; choose XCAF storage when that document-level information must be preserved.
For a production pipeline, keep a representative source file and its expected geometry and attributes with the conversion settings. Discuss conversion integration with the source and destination applications, or compare the supported format interfaces.