Ahmad M. Aljamali and Ebad Banissi
Visualisation and Graphics
Research Unit
Department
of Computing, Information Systems & Mathematics
South Bank University.London.
aljamali@yahoo.com banisse@vax.sbu.ac.uk
This paper proposes a rational
classification of Islamic Geometric Patterns (IGP) based on the Minimum Number
of Grids (MNG) and Lowest Geometric Shape (LGS) used in the construction of the
symmetric elements. The existing classification of repeating patterns by their
symmetric groups is in many cases not appropriate or prudent [Joy97]. The symmetry group theories do not relate to
the way of thinking of the artisans involved, and completely has ignored the
attributes of the unit pattern and has focused exclusively on arrangement
formats. The paper considers the
current symmetric group theories only as arrangement patterns and not as
classifications of IGP since they have a “global approach” and have failed to
explore the possibilities in the construction
elements of IGP. The Star, a
central Rosette, which is the most important element of IGP, forms the core of
our study. The paper proposes new nomenclature to be used in the description of
the unit pattern based on the MNG and LGS used in the construction of a Star/Rosette pattern that can be
used to achieve the final design. We describe and demonstrate procedures for
constructing Star/Rosette unit patterns based on
our proposed classification in a grid formation dictated by the final design of
the unit pattern.
Keywords: - IGP, MNG, LGS, Grid, Classification, Group
Theory, Star/Rosette.