![]() ![]() VMD can communicate with other programs via Tcl/ Tk. In subsequent developments, Jordi Cohen, Gullingsrud, and Stone entirely rewrote the graphical user interfaces, added built-in support for display and processing of volumetric data, and the use of OpenGL Shading Language. In 2001, Justin Gullingsrud, and Paul Grayson, and John Stone added support for haptic feedback devices and further developing the interface between VMD and NAMD for performing interactive molecular dynamics simulations. The first version of VMD for the Microsoft Windows platform was released in 1999. In 1998, John Stone became the main VMD developer, porting VMD to many other Unix operating systems and completing the first full-featured OpenGL version. Ulrich in 1995–1996, followed by Sergei Izrailev and J. The earliest versions of VMD were developed for Silicon Graphics workstations and could also run in a cave automatic virtual environment (CAVE) and communicate with a Nanoscale Molecular Dynamics ( NAMD) simulation. The initial version of VMD was written by William Humphrey, Andrew Dalke, Ken Hamer, Jon Leech, and James Phillips. A precursor program, called VRChem, was developed in 1992 by Mike Krogh, William Humphrey, and Rick Kufrin. VMD has been developed under the aegis of principal investigator Klaus Schulten in the Theoretical and Computational Biophysics group at the Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana–Champaign. The VMD axes are shown as a simple example of rendering of non-molecular geometry. The Tachyon rendering uses both direct lighting and ambient occlusion lighting to improve the visibility of pockets and cavities. The scene is shown with a combination molecular surfaces colored by a radial distance, and nucleic acids shown in ribbon representations. History Satellite tobacco mosaic virus molecular graphics produced in VMD and rendered using Tachyon. VMD is available to non-commercial users under a distribution-specific license which permits both use of the program and modification of its source code, at no charge. VMD runs on Unix, Apple Mac macOS, and Microsoft Windows. Users can run their own Tcl and Python scripts within VMD as it includes embedded Tcl and Python interpreters. Molecular scenes can be exported to external rendering tools such as POV-Ray, RenderMan, Tachyon, Virtual Reality Modeling Language ( VRML), and many others. It also includes tools for working with volumetric data, sequence data, and arbitrary graphics objects. VMD is developed mainly as a tool to view and analyze the results of molecular dynamics simulations. Visual Molecular Dynamics ( VMD) is a molecular modelling and visualization computer program. VMD visualization of a 1-billion atom aerosolized SARS-CoV-2 virion, rendered with Tachyon on a workstation with 1TB RAM. ![]()
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