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Cubes with hidden lines: dotted, dashed, and thin lines. Cubes with no hidden lines, and a cube with dotted lines to give 3 dimensional reference. A common practice is to draw the visible edges as solid lines and the hidden lines as dotted lines, dashed lines, [2] or thinner lines than the visible lines. Hidden lines add geometric information ...
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Drafting board with a T-square and triangle A T-square is a technical drawing instrument used by draftsmen primarily as a guide for drawing horizontal lines on a drafting table . The instrument is named after its resemblance to the letter T, with a long shaft called the "blade" and a short shaft called the "stock" or "head".
The hidden-line algorithm uses n 2 exclusive read, exclusive write (EREW) PRAM processors. The EREW model is the PRAM variant closest to real machines. The hidden-line algorithm does O(n 2 log n) work, which is the upper bound for the best sequential algorithms used in practice. Cook, Dwork and Reischuk gave an Ω(log n) lower bound for finding ...
Contributing factors were the development of computer-aided drafting and printing, the speed of machine printing, and the introduction of larger xerographic machines or large format printers from companies like Ricoh and Xerox. The cost of blueline production materials and equipment, the fact that the prints themselves faded in sunlight, and ...