Interactive graphics has been limited to simple direct illumination that commonly results in an artificial appearance. A more realistic appearance by simulating global illumination effects has been too costly to compute at interactive rates. In this paper we describe a new Monte Carlo-based global illumination algorithm. It achieves performance of up to 10 frames per second while arbitrary chan...

graphics capability, and to give the POGO user an extensive interactive computational facility. This Memorandum should therefore be of interest to systems programmers and applications programmers who are concerned with the PL/I language, with computer graphics, or with interactive programming. The PL/I language is text-oriented; it does not contain commands needed for computer graphics (e.g., "...

This paper describes a technique for using a simple shading method, such as the Phong lighting model, to approximate the appearance calculated by a more accurate method. The results are then suitable for rapid display using existing graphics hardware and portable via standard graphics API's. Interactive walkthroughs of view-independent nondi use global illumination solutions are explored as the...

-Three-dimensional finite element structural analysis computer programs can only be used effectively when the input can be accurately generated and checked, and the output correctly examined. With the use of the Sandia Interactive Graphics System, SIGS, which consists of a cathode ray tube, a mini-computer, a CDC 6600 computer and an interactive graphics computer software system, both input and...

Computer generated images by default render the entire scene in perfect focus. Both camera optics and the human visual system have limited depth of field, due to the finite aperture or pupil of the optical system. For more realistic computer graphics as well as to enable artistic control over what is and what is not in focus, it is desirable to add depth of field blurring. Starting with the wor...

Several nonpeptide small molecules were designed as potential inhibitors of HIV protease and their structures were constructed by computer-aided molecular modeling and docked iwo the active site of HIV protease. Models of the complexes of inhibitors and the HIV protease were refined using nonbonded and H-bonding terms. The refined energy of selected complexes showed that the designed inhib...

Today, interactive computer graphics has to deal with data sets of increasing complexity. This trend can be observed in many application areas: In scientific visualisation, the complexity of data sets has grown enormously due to improvements in sensor and simulation technology. In the area of computer aided design (CAD), three-dimensional virtual prototypes of complex projects should be visuali...