AlToSt

Purpose

Converts Alias wire files to ISO10303 format, specifically these:

application protocols ISO10303-203, or Configuration Controlled Design, conformance classes 1 to 4, and
ISO10303-214, or Core Data for Automotive Mechanical Design Process, conformance classes 1 and 2.

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 Entity	Alias Entity
Cartesian Point	Point
Line	B-Spline Curve
Circle	B-Spline Curve
Ellipse	B-Spline Curve
Parabola	B-Spline Curve
Hyperbola	B-Spline Curve
PolyLine	B-Spline Curve
Composite Curve	B-Spline Curve (Grouped)
Trimmed Curve	B-Spline Curve
B-Spline Curve	B-Spline Curve
Plane	B-Spline Surface
Cylindrical Surface	B-Spline Surface
Conical Surface	B-Spline Surface
Spherical Surface	B-Spline Surface
Toroidal Surface	B-Spline Surface
Surface of Linear Extrusion	B-Spline Surface
Surface of Revolution	B-Spline Surface
B-Spline Surface	B-Spline Surface
Rectangular Trimmed Surface	Trimmed Surface
Curve Bounded Surface	Trimmed Surface
Offset Surface	B-Spline Surface
Manifold Solid Brep	Shell (Closed)
Shell Based Surface Model	Shell (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>
-p	specifies which AP to output: either 203 or 214. The default is AP214
-m value	specifies 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 value	specifies 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 value	specifies 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
-c	outputs presentation data. This option is valid only for AP214 files.
-l	outputs layer data. This option is valid only for AP214 files.
-h	Displays help on usage
Where:
<infile>	specifies an Alias wire file to use as input.
<outfile>	specifies the STEP file to write output to.