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    • 11. 发明授权
    • Automatic contour tracking method for CAD
    • CAD的自动轮廓跟踪方法
    • US5122965A
    • 1992-06-16
    • US481565
    • 1990-02-20
    • Syuji NishidaAkitoshi KojimaTooru Nakada
    • Syuji NishidaAkitoshi KojimaTooru Nakada
    • G06F17/50G06K11/02G06T7/60
    • G06K11/02
    • An automatic contour tracking method for CAD in which a start element is indicated from continuous elements of a drawing on a display, and the tracking direction and the internal turn and the external turn are set, and the continuous elements are sequentially discriminated and selected according to the tracking direction and the internal turn and the external turn on the basis of the start element as the basic point whereby the contour data is obtained automatically, the automatic contour tracking method including finding an angle .theta. between a final selection element and a candidate element to be chosen next when the next candidate element to be chosen next appears on the final selection element, and selecting one element from among a plurality of candidate elements to be chosen by giving a priority on the element having a smaller angle .theta. in case the contour tracking is the internal turn, and giving a priority on the element having a larger angle .theta. in case the contour tracking is the external turn.
    • 一种用于CAD的自动轮廓跟踪方法,其中从显示器上的图形的连续元素指示起始元素,并且设置跟踪方向和内部转弯和外部转弯,并且依次区分和选择连续元素 基于起始元件的跟踪方向和内部转弯以及外部转弯作为自动获得轮廓数据的基本点,所述自动轮廓跟踪方法包括找到最终选择元素和候选元素之间的角度θ 当下一个要被选择的候选元素出现在最终选择元素上时,选择下一个候选元素,并且通过在具有较小角度θ的元素上给出优先权来选择要选择的多个候选元素中的一个元素 是内部转弯,并且在轮廓跟踪的情况下给予具有较大角度θ的元件优先考虑 ng是外线。