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Figure processing apparatus and method aided by display with ruled lines

  • US 5,302,967 A
  • Filed: 11/21/1991
  • Issued: 04/12/1994
  • Est. Priority Date: 11/26/1990
  • Status: Expired due to Fees
First Claim
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1. A figure processing method for drafting drawings using a drafting machine having a display screen for displaying a subjected figure to be drafted with a figure constructing procedure and ruled lines defined by at least one datum point and used for aiding an operator in a drafting operation, comprising the steps of:

  • displaying the subjected figure to be drafted on the display screen;

    determining a sort of the ruled lines to be displayed, in accordance with a shape of the subjected figure to be drafted and displayed on the display screen and the figure constructing procedure selected by the operator;

    determining a coordinate of the datum point of the ruled lines on the display screen in accordance with the shape of the subjected figure;

    displaying a configuration of the ruled lines, based on the coordinates of the datum point;

    acquiring coordinates of a point designated by the operator;

    modifying the coordinates of the designated point, for compliance with the ruled lines; and

    ,performing the selected figure constructing procedure on the subjected figure, for compliance with the modified coordinates of the designated point.

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