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LATTICEPATCH – an interactive graphics program to design data measurement strategies for area detectors
Author(s) -
Klinger A. L.,
Kretsinger R. H.
Publication year - 1989
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889888014888
Subject(s) - graphics , detector , orientation (vector space) , computer science , reciprocal , surface (topology) , reciprocal lattice , computer graphics (images) , representation (politics) , computer graphics , optics , symmetry (geometry) , set (abstract data type) , diffraction , geometry , physics , mathematics , linguistics , philosophy , politics , law , political science , programming language
LATTICEPATCH is an interactive graphics program used to evaluate strategies for measuring X‐ray diffraction data with area detectors. It is written in C and runs on the Silicon Graphics IRIS Series 3000 computers. It displays, at designated resolution, a sphere in reciprocal space and indicates the area(s) on its surface that both satisfy the Bragg condition and are projected onto the detector surface(s) during ϕ and ω rotations of the goniostat. The user can determine an efficient strategy for obtaining a unique set of data by changing interactively the goniostat settings. The orientation of the crystal may be changed to accommodate the use of several crystals. Symmetry operations may be invoked to produce equivalent scans and the reciprocal‐space representation may be rotated about the x, y and z axes of the screen. The relevant calculations are discussed, the program is described and the development of strategies in several cases using LATTICEPATCH is examined.