VRML (Virtual Reality Modeling Language, pronounced vermal or by its initials, originally—before 1995—known as the Virtual Reality Markup Language) is a standard file format for representing 3-dimensional (3D) interactive vector graphics, designed particularly with the World Wide Web in mind.
VRML is a text file format where, e.g., vertices and edges for a 3D polygon can be specified along with the surface color, UV mapped textures, shininess, transparency, and so on. URLs can be associated with graphical components so that a web browser might fetch a webpage or a new VRML file from the Internet when the user clicks on the specific graphical component. Animations, sounds, lighting, and other aspects of the virtual world can interact with the user or may be triggered by external events such as timers. A special Script Node allows the addition of program code (e.g., written in Java or ECMAScript) to a VRML file.
VRML files are commonly called "worlds" and have the *.wrl extension (for example island.wrl). VRML files are in plain text and generally compress well using gzip, useful for transferring over the internet more quickly (some gzip compressed files use the *.wrz extension). Many 3D modeling programs can save objects and scenes in VRML format.
PTC Creo by Parametric Technology Corporation, known as Pro/Engineer is a 3D CAD, CAM, CAE, and associative solid modeling application. It provides solid modeling, assembly modeling, 2D orthographic views, FEA, direct and parametric modeling, sub-divisional and NURBS surface modeling, and tools for mechanical designers. Its users are mostly mechanical engineers, designers and manufacturers. The app runs on Microsoft Windows.
The application is based on the parametric modeling approach, which means that it uses parameters, dimensions, features, and relationships to enable design automation and optimization of design and product development processes. Companies with family-based or platform-driven product strategy make use of this approach for what they need to perform successful design processes is a prescriptive design strategy.
The capabilities of the product can be split into three main groups, that is Engineering design, Analysis and Manufacturing. Product design processes include the ability to generate geometry of other integrated design disciplines such as industrial and standard pipe work and complete wiring definitions. Creo has numerous analysis tools which help with the development of the product which include human factors, manufacturing tolerance, mould flow and design optimization. As for manufacturing, the app has tooling options for molding, die-casting and progressive tooling design.
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