The Language G-CAD
Introduction
G‑CAD, which
stands for GENETICA CAD, is a computer language specialized in problem solving
within the framework of architectural designing. G‑CAD is a GENETICA‑like
(non GP) language where data generation scenarios evolve with respect to either
confirmation or optimization goals formulated in the G‑CAD program.
Design objects are represented in G‑CAD as interrelated logical
constructions having both internal properties and communication channels. G‑CAD
programming has the following features:
·
Domain
specific knowledge expressed in formal logic is encapsulated in design objects
·
Objects
exhibit context sensitive behavior based on object-to-object interactions.
·
Both top-down
and bottom-up interactions occur in the object hierarchy.
·
Higher level
objects result from behavior-driven selfassembly of lower level ones.
G‑CAD has been
developed in GENETICA under the principles presented in GENETICA‑based_Languages.PDF.
Specifically G‑CAD has been implemented as a GENETICA program, having
input an arbitrary G‑CAD program. The execution of the latter program
reflects the execution of the former one which operates as a G‑CAD
interpreter and it is controlled by the evolutionary computational system
within GENETICA’s environment.
A brief unifying
presentation of G‑CAD is presented in Section IV.C of the article
"GENETICA: A Computer Language That Supports General Formal Expression
With Evolving Data Structures", IEEE Transactions on
Evolutionary Computation, volume 7, issue 5, October 2003, pp.456-481.
G‑CAD
documentation is included in the file G‑CAD_Documentation.PDF.
Section 1 presents G‑CAD’s terms and objects, the latter viewed as
composite terms. Section 2 presents both the syntax and the functionality of
the G‑GAD formulae. Section 3 presents the data organization in the
problem formulation and the solution representation method. Appendix A provides
a reference on special classes of G‑CAD formulae, while Appendix B
presents the formulation in G‑GAD of a design problem concerning a
hotel’s floorplan.
An easy to understand visual presentation of both G-CAD and the architectural case study is included in the files Section_5.PPS and Section_6.PPS.
