Formatul a apărut pentru prima dată în anii 1990 cu scopul de a standardiza nu numai conținutul 3D, ci și date suplimentare specifice utilizării industriale, cum ar fi toleranțele și materialele. Cunoscut ca standardul ISO-10303-21, standardul pentru fișierele STEP a fost revizuit de-a lungul anilor pentru a permite funcții suplimentare.
Datele 3D din fișierul STEP sunt reprezentate sub formă de text folosind o combinație de forme formate din fețe, muchii și alte date geometrice. După cum sa menționat, formatul STEP a fost conceput pentru a fi un standard pentru schimbul de modele 3D, ceea ce înseamnă că are suport larg în rândul aplicațiilor de modelare CAD și 3D, precum și al software-ului de conversie a fișierelor.
000ISO-10303-21;
001HEADER;
002/* Generated by software containing ST-Developer
003 * from STEP Tools, Inc. (www.steptools.com)
004 */
005
006FILE_DESCRIPTION(
007/* description */ (''),
008/* implementation_level */ '2;1');
009
010FILE_NAME(
011/* name */ 'c5.stp',
012/* time_stamp */ '2024-02-05T06:35:35+00:00',
013/* author */ (''),
014/* organization */ (''),
015
016/* authorisation */ '');
017
018FILE_SCHEMA (('AUTOMOTIVE_DESIGN { 1 0 10303 214 3 1 1 }'));
019ENDSEC;
020
021DATA;
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024#12=ORIENTED_CLOSED_SHELL($,*,#11433,.F.);
025#13=ORIENTED_CLOSED_SHELL($,*,#11434,.F.);
026#14=ORIENTED_CLOSED_SHELL($,*,#11435,.F.);
027#15=CONICAL_SURFACE($,#11713,0.59315625,0.759762754875772);
028#16=CONICAL_SURFACE($,#11720,0.59315625,0.759762754875772);
029#17=SPHERICAL_SURFACE($,#11545,0.01265625);
030#18=SPHERICAL_SURFACE($,#11591,0.050625);
031#19=SPHERICAL_SURFACE($,#11689,0.050625);
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033#21=TOROIDAL_SURFACE($,#12201,0.3290625,0.0759375);
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035#23=TOROIDAL_SURFACE($,#12211,0.1771875,0.0759375);
036#24=(
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065REPRESENTATION_ITEM($)
066SURFACE()
067);
Datorită formatului bazat pe text, fișierele STEP pot deveni foarte mari atunci când salvează date 3D complexe în format. De asemenea, fișierele STEP pot dura ceva timp pentru a se încărca în software-ul de editare, așa că vă rugăm să acordați timp suplimentar atunci când editați aceste fișiere.
