A computer aided design system which results in reduced operator fatigue, increased speed, and increased accuracy features a single workspace for inputting information, such as type of drafting exercise, graphic element or symbol, element position established either by element coordinate designation
A computer aided design system which results in reduced operator fatigue, increased speed, and increased accuracy features a single workspace for inputting information, such as type of drafting exercise, graphic element or symbol, element position established either by element coordinate designation or cursor tracking and alpha/numeric keyboard-like entries. The system utilizes dual CRT screens, one, the graphics screen, for viewing the end product of the graphic design and the other, the function screen, for providing a single workspace for entering data. In one embodiment, input data either in the form of fixed format blocks or sequentially presented menus are displayed to the operator at the function screen so that he may select appropriate inputs with a light pen. Because all types of inputs are accomplished at a single workspace, the single workspace function screen avoids eye and arm fatigue so that the operator (i.e. draftsman or engineer) may comfortably and more accurately create the finished product with a minimum of eye, arm and mental operations. The advantages of the single workspace in terms of error reduction and fatigue reduction are complemented by displaying status messages at the function screen so that the operator need not look elsewhere to ascertain the accuracy or status of his input. The single workspace system requires that the operator only point as opposed to making other types of entries in order to create his design. In one embodiment a valid input is indicated by the lifting of the pen once a menu selection or pick has been established thereby to give the operator time to ascertain whether his menu pick is correct. Image reversal is also used to indicate the portion of the menu selected during the menu pick operation.
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1. A computer aided design system for creating a design on a graphics screen by instructions entered through a separated function screen comprising: a work station having a work surface including within said surface a function screen and further having, extending vertically above said surface, a
1. A computer aided design system for creating a design on a graphics screen by instructions entered through a separated function screen comprising: a work station having a work surface including within said surface a function screen and further having, extending vertically above said surface, a graphics screen, separate from said function screen, for displaying a design in creation; means for driving a portion of said function screen to display a mode selection including a selection of a keyboard mode, a position denoting mode and plural other modes for symbol and associated parameter selection and for driving other portions of said function screen with selectable design information associated with a selected mode; point and pick means for selecting a point and corresponding mode or associated design information on said function screen; means responsive to selection of a point on said function screen portion corresponding to one of said mode selections for changing the display mode of said function screen to produce a display enabling point and pick selection of information corresponding to the mode selected wherein, the selection of the keyboard mode results in the display of a simulated keyboard from which point and pick selection of keyboard character design information may be made, and the selection of the position mode results in the availability of the function screen to be used to select position design information thereon with said point and pick means that designates corresponding positions on the graphics screen, and wherein the selection of one or more symbol selection modes by said point and pick means results in the function screen displaying selections of graphic element design information and parameters associated therewith; said system further including a means for producing design displays on said graphics screen in response to mode and associated design information selections made through said function screen by operation of said point and pick means. 2. The system of claim 1 wherein said point and pick means includes a pen adapted to be placed on said function screen and means for inhibiting a selection by said pen until said pen has been maintained at one location on said screen and then has been removed for a predetermined period of time. 3. The system of claim 1 wherein said function screen drive means includes means for video reversing on said function screen information which has been selected. 4. The system of claim 1 wherein said function screen drive means includes means for displaying on a selected portion of said function screen as indication of prior selections. 5. The system of claim 1 wherein said means for driving said graphics screen includes means for selecting by said point and pick means a cursor track mode to enable the moving of a symbol generated on said graphics screen in accordance with movement of said point and pick means across said function screen. 6. The system of claim 1 wherein said function screen drive means includes means for displaying on a selected portion of said function screen, within a fixed information area, menus selected by prior selections of said point and pick means. 7. The system of claim 6 wherein said means include among said symbols, graphic elements indicating components to be displayed on said graphics screen. 8. A computer aided design method for creating a design on a graphics screen by instructions entered through a separated function screen comprising, the steps of: driving a portion of a function screen located within a surface of a work station with a portion displaying a mode selection including a selection of a keyboard mode, a position denoting mode and plural other modes for symbol and associated parameter selection and driving other portions of said function screen with selectable design information associated with a selected mode; selecting by point and pick means a point and corresponding mode or associated design information on said function screen; responding to selection of a point on said function screen portion corresponding to one of said mode selections to change the display mode of said function screen to produce a display enabling point and pick selection of information corresponding to the mode selection, wherein the selection of the keyboard mode results in the display of a simulated keyboard from which point and pick selection of keyboard character design information may be made, and the selection of the position mode results in the availability of the function screen to be used to select position design information thereon with said point and pick means that designates corresponding ppositions on the graphics screen, and wherein the selection of one or more symbol selection modes by said point and pick means reslts in the function screen displaying selections of graphic element design information and parameters associated therewith; said method further including the step of producing design displays on a graphics screen extending vertically above said surface in response to mode and associated design information selections made through said function screen by operation of said point and pick means. 9. The method of claim 8 and further including the steps of presenting status messages on the function screen, whereby an operator need not glance elsewhere to establish an input or the correctness thereof. 10. The method of claim 8 and further including the step of video reversing on the function screen information which has been selected by the pen pick means, thereby to provide instantaneous feedback to an operator. 11. The method of claim 8 wherein the selecting step is only operative to select information from the function screen after the pen has been located on the function screen and has then been removed from the function screen for a predetermined length of time.
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