이 형식은 3D 콘텐츠뿐만 아니라 공차, 재료 등 산업 용도에 맞는 추가 데이터를 표준화하려는 목적으로 1990년대에 처음 등장했습니다. ISO-10303-21 표준으로 알려진 STEP 파일 표준은 추가 기능을 활성화하기 위해 수년에 걸쳐 개정되었습니다.
STEP 파일 내의 3D 데이터는 면, 모서리 및 기타 기하학적 데이터로 구성된 모양의 조합을 사용하여 텍스트 형식으로 표현됩니다. 앞서 언급한 바와 같이 STEP 형식은 3D 모델 교환을 위한 표준으로 설계되었습니다. 즉, 파일 변환 소프트웨어는 물론 CAD 및 3D 모델링 응용 프로그램을 광범위하게 지원합니다.
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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023#11=ADVANCED_BREP_SHAPE_REPRESENTATION($,(#11436),#22538);
024#12=ORIENTED_CLOSED_SHELL($,*,#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($,#11689,0.050625);
032#20=SPHERICAL_SURFACE($,#11742,0.050625);
033#21=TOROIDAL_SURFACE($,#12201,0.3290625,0.0759375);
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035#23=TOROIDAL_SURFACE($,#12211,0.1771875,0.0759375);
036#24=(
037BOUNDED_SURFACE()
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050GEOMETRIC_REPRESENTATION_ITEM()
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0620.5,0.707106781186548,0.5,0.707106781186548,0.5,0.707106781186548),(1.,
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065REPRESENTATION_ITEM($)
066SURFACE()
067);
텍스트 기반 형식으로 인해 복잡한 3D 데이터를 형식으로 저장할 때 STEP 파일이 매우 커질 수 있습니다. STEP 파일은 편집 소프트웨어로 로드하는 데 약간의 시간이 걸릴 수 있으므로 이러한 파일을 편집할 때 추가 시간을 허용하십시오.