title: Photorealistic image generation of molecular structure on PC screen using the ray-tracing technique.
abstract: A PC version of three-dimensional molecular graphics package has been developed to run under MS-DOS environment on IBM PC-compatible computers equipped with a VGA graphics board. The program consists of two parts: a menu-driven interactive system module in EGA mode, and a ray-tracing module in VGA mode. In the 256-color VGA mode, ray-tracing images are represented with a 4-color map, with 64 levels for each color: 32 levels of illuminance and 32 levels of saturation. Molecular structure can be analyzed along various directions with various light sources. Ray-tracing images are also represented in a 16-color EGA mode with the half-toning method, which can display 76 gray levels for each color. To obtain good photo-realistic images in an efficient way, we have used two light sources, with an intensity ratio of 7:3, which are located in front of the top right and bottom left corners of the screen.
authors: Department of Chemistry, Pohang Institute of Science and Technology, Republic of Korea.
authors: S
authors: S
authors: Kim
authors: C W
authors: CW
authors: Yoon
authors: B J
authors: BJ
authors: Mhin
authors: H S
authors: HS
authors: Kim
authors: K S
authors: KS
authors: Kim
mesh_terms: D002268:Carboxypeptidases / Q000737:chemistry / Q000648:ultrastructure; D043422:Carboxypeptidases A; D003196:Computer Graphics; D008838:Microcomputers; D008958:Models, Molecular; D015394:Molecular Structure; D011487:Protein Conformation; D012984:Software
chemical_list: D002268:Carboxypeptidases; D043422:Carboxypeptidases A