Sutherland sketchpad software#
Hanratty is sometimes called the "father of CAD/CAM" and wrote PRONTO, a numerical control language at General Electric in 1957, and wrote CAD software while working for General Motors beginning in 1961. Sketchpad is the first program to interactively create line drawings of striking complexity on a computer screen. One of the projects for this machine was Sketchpad by Ivan Sutherland in the early 1960s. Very few programs can be called precedents for his achievements. Lincoln Laboratory at MIT had one of the first transistorized computers, a TX-2 with 69,632 words of core memory to 36 bits each. The Sketchpad system makes it possible for a man and a computer to converse rapidly. Geometric constraints was another major invention in Sketchpad, letting the user easily constrain geometric properties in the drawing-for instance, the length of a line or the angle between two lines could be fixed.Īs a trade magazine said, clearly Sutherland "broke new ground in 3D computer modeling and visual simulation, the basis for computer graphics and CAD/CAM". Sutherland Published in AFIPS 63 (Spring) 30 December 1899 Art.
If the user changed the master drawing, all the instances would change as well. The main idea was to have master drawings which one could instantiate into many duplicates. The clever way the program organized its geometric data pioneered the use of "master" ("objects") and "occurrences" ("instances") in computing and pointed forward to object oriented programming.
The Sketchpad system makes it possible for a man and a computer to. Sketchpad was the first program ever to utilize a complete graphical user interface. Sketchpad: a man-machine graphical communication system.
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