Concepts of Computer Graphics/Output Space/Vectors/STEP

STEP or Standardized Exchange of Product is a CAD/CAM standard used to write out information for interchange by many modeler program like CATIA, PTC's Pro/Engineer, SolidEdge, and SolidWorks.


 * 2D used in draft represent a vector layout


 * 3D Boundary representations (BREP), have 4 major types:
 * 3D Boundary representations (BREP), have 4 major types:


 * 1) * I) Wireframe
 * 1) * I) Wireframe


 * 1) * II)  Simple


 * 1) * III)  Facetted representation,


 * 1) * IV)  Advanced boundary representation.



[http://wheger.tripod.com/step/csg.stp CSG Constructive Solid Geometry]

In addition to representing geometry and topology, the format allows for representing additional engineering processes (e.g. stage of the model and annotations). Furthermore, one can write a feature history and associate to the CSG representation, the BREP.