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: * I) Wireframe * II) Simple * III) Facetted representation, * 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.