An Introduction to 3D Printing by Zukas Victoria & Zukas Jonas A

Author:Zukas, Victoria & Zukas, Jonas A.
Language: eng
Format: epub
Publisher: First Edition Design Publishing
Published: 2015-05-05T16:00:00+00:00

PTC CREO Elements/Direct Modeling Express 6.0 is the free version of PTC Creo Elements/Direct Modeling 19.0. The program is aimed at engineers in search of a lightweight, flexible 3D CAD system who need to rapidly design and print one-of-a-kind objects and variations thereof. A variety of support services are available.

3.1.2 Freeform Software

CAD software is not the only path to the creation of a 3D digital model. For some time, 3D computer graphics software has been available offering features which permit 3D computer animation, modeling, simulation and rendering for games, film and motion graphics artists. The basic principles are taught at universities and the subject of many texts, among them the book by Vaughan [63]. Since the tools employed by graphic artists include polygons, NURBS and subdivisions, a 3D model suitable for printing is created in the process. As we haven’t mentioned it before, a subdivision surface [64-65] is a method of representing a smooth surface using a piecewise linear polygonal mesh. A mesh is piecewise linear if every edge is a straight line and every surface is a plane. The most common examples are triangles in two dimensions and tetrahedra in three dimensions, though other options are possible. Given a mesh, it is refined by subdividing it, creating new meshes and vertices. The result is a finer mesh than the original one, containing more polygonal faces. This can be done over and over until the desired degree of surface refinement is achieved.

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