AlToSt

Purpose

Converts Alias wire files to ISO10303 format, specifically these:

The import and export of this data is supported via ISO10303-21 Physical File exchange. You might need a separate licence to run this utility.

Application protocol support

The geometric data formats in ISO10303-203 and ISO10303-214 are identical. This comprises the core of the implementation of the translator. The following table shows the mappings made.

Step EntityAlias Entity
Cartesian PointPoint
LineB-Spline Curve
CircleB-Spline Curve
EllipseB-Spline Curve
ParabolaB-Spline Curve
HyperbolaB-Spline Curve
PolyLineB-Spline Curve
Composite CurveB-Spline Curve (Grouped)
Trimmed CurveB-Spline Curve
B-Spline CurveB-Spline Curve
PlaneB-Spline Surface
Cylindrical SurfaceB-Spline Surface
Conical SurfaceB-Spline Surface
Spherical SurfaceB-Spline Surface
Toroidal SurfaceB-Spline Surface
Surface of Linear ExtrusionB-Spline Surface
Surface of RevolutionB-Spline Surface
B-Spline SurfaceB-Spline Surface
Rectangular Trimmed SurfaceTrimmed Surface
Curve Bounded SurfaceTrimmed Surface
Offset SurfaceB-Spline Surface
Manifold Solid BrepShell (Closed)
Shell Based Surface ModelShell (Open/Closed)

STEP logfile

When retrieval finishes without errors, this message is displayed:

STEP files retrieved successfully.

If there were errors in the retrieval, you see:

Problem Reading Step File, refer to log file for details.

The STEP logfile contain an error message for each problem entity that is encountered. Each error contains the STEP entity ID and entity type.

Description

AlToSt [ <options> ] -i<infile> -o<outfile> 
-pspecifies which AP to output: either 203 or 214. The default is AP214
-m valuespecifies which model representation to output. Value can be one of:1 = wireframes2 = surface models3 = manifold surface models (shells)5 = brep solids6 = hybrid models (the default)
-t valuespecifies the type of trimming that is done. This option is valid for surface models only. Value can be one of:1 = parameter space trimming (the default)2= world space trimming
-g valuespecifies the type of geometry to output. This option is valid only for shells. Value can be one of:1 = shells only (the default)2 = all geometry
-coutputs presentation data. This option is valid only for AP214 files.
-loutputs layer data. This option is valid only for AP214 files.
-hDisplays help on usage
Where: 
<infile>specifies an Alias wire file to use as input.
<outfile>specifies the STEP file to write output to.