File Formats: IGES File

Description

IGES (Initial Graphics Exchange Specification) is an ANSI standard. Geometry is defined mathematically using analytic and parametric surfaces and curves, such as Non-Uniform Rational B-Splines (NURBS). Finite element entities in IGES files are not supported by the Straus7 IGES importer. The Straus7 IGES import function supports IGES revision 5.3 and earlier. Only text format IGES files can be imported. The Straus7 IGES export module exports only geometry (no finite element data is exported).

Supported IGES Entities

The following IGES entities are supported by Straus7:

100: Circular Curve/Arc
102: Composite Curve
104: Conic Curve
106: Simple Planar Curve
108: Plane Entity
110: Line
112: Cubic Spline Curve
114: Cubic Spline Surface
116: Point
118: Ruled Surface
120: Surface of Revolution
122: Tabulated Cylinder Surface
123: Direction
124: Transformation Matrix
126: Rational B-Spline Curve
128: Rational B-Spline Surface
140: Offset Surface
141: Boundary
142: Parametric Boundary
143: Bounded Surface
144: Trimmed (Parametric) Surface
190: Plane Surface
192: Cylinder Surface
194: Conical Surface
196: Spherical Surface
198: Toroidal Surface
308: Subfigure Definition
314: Colour Definition
406: Level Definition
408: Subfigure Instance
502: Vertex
504: Edge
508: Loop
510: Face
514: Shell

Units

IGES files with defined units are scaled to the current units of the Straus7 model on import. If the Straus7 model uses no units, geometry data is imported unscaled.

Import/Export Log File Viewer

If warnings or errors are encountered during import or export, a log file is generated and displayed by the View Log File: Log File Viewer. The log file (with extension .LOG) is saved in the same folder as the IGES file; if the folder is a read-only location, the log file is not generated and Straus7 issues a warning message.