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This paper outlines some of the ways in which the basic facilities provided by computer graphics have been used to enhance the output from design programs. It then goes on to discuss in general terms the problems of developing computer methods for the production of drawings per se. It illustrates the problem by reference to six currently available drafting systems examined by the author as part of a study contract from the Property Services Agency of the Department of Environment. The paper
gives conclusions on the systems studied and the current state of computer drafting systems generally.
The CADRAW computer drafting system was developed in the London office of Ove Arup & Partners. The objectives of the development, the various programs and their method of operation are described, and examples are given of the drawings produced.
R. Whittle and P. Morreau
Man with a secret
Most engineers, scientists, scholars, having conceived something new, unhesitatingly rush into print, especially if there is no pecuniary advantage in eschewing disclosure. Not so Mr John Nayler, who believes that he may possibly have rediscovered a simple solution to an important proposition. He writes: This submission may be 2400 years late! After I had explained the uses of Pythagoras’ theorem to a bright evening
class of would-be builders and clerks of works, I checked with several encyclopaedias, and it seems that there is no known simple proof of this theorem. Correct me, please, if I am wrong. Euclid stated an alleged proof 300 years after Pythagoras, and it is not simple.