| 摘要 |
Lines of various slopes and positions are generated simply in a computer aided manual drafting system. Such lines may be drawn with a modified puck manually movable over a surface to control the position of a cursor in an electronic computer display, and may be stored for later adoption in a manually directed computer aided drafting step. The puck senses two spaced positions on a surface over which it moves, thereby to define the slope of a line positioned with a datum point at the cursor location positioned by the puck in a conventional manner. Lines in this system are defined by two points in a coordinate system, namely a datum position point and a slope position point. This format affords simplified entry, processing and storage of line data in a computer. Such lines are electronically formulated in a graphical representation on a visual graphical display in response to manual controls, either directly on line from simplified puck manipulation, or from stored line data to be positioned and controlled in a graphical display by puck manipulation. Thus, unique lines are generated by locating a cursor position with the puck to define a line location (datum) and by moving the puck to define another point spaced from the datum point thus defining the slope of the line relative to the cursor position.
|
