关于曲线两点间中点

eachy · 发表于 2014-8-7 08:53:11

马上注册，结交更多好友，享用更多功能，让你轻松玩转社区。

您需要登录才可以下载或查看，没有账号？立即注册

×

;;闭合线时根据 p1 p2 顺序取中点
(defun Curve:MidPntat (curve p1 p2 / d1 d2 tl d d0)
(setq p1 (vlax-curve-getclosestpointto curve p1)
p2 (vlax-curve-getclosestpointto curve p2)
d1 (vlax-curve-getdistatpoint curve p1)
d2 (vlax-curve-getdistatpoint curve p2)
)
(if (and (or (vlax-curve-isclosed curve)
(equal (vlax-curve-getstartpoint curve)
(vlax-curve-getendpoint curve)
1e-6
)
)
(> d1 d2)
)
(progn
(setq tl (vlax-curve-getdistatparam
curve
(vlax-curve-getendparam curve)
)
d0 (- tl d1)
d (* (+ d0 d2) 0.5)
)
(if (> d d0)
(vlax-curve-getpointatdist curve d)
(vlax-curve-getpointatdist curve (+ d1 d))
)
)
(vlax-curve-getpointatdist curve (* (+ d1 d2) 0.5))
)
)

;;闭合线时根据 p1 p2 顺序取中点 
(defun Curve:MidPntat (curve p1 p2 / d1 d2 tl d d0) 
  (setq        p1 (vlax-curve-getclosestpointto curve p1) 
        p2 (vlax-curve-getclosestpointto curve p2) 
        d1 (vlax-curve-getdistatpoint curve p1) 
        d2 (vlax-curve-getdistatpoint curve p2) 
  ) 
  (if (and (or (vlax-curve-isclosed curve) 
               (equal (vlax-curve-getstartpoint curve) 
                      (vlax-curve-getendpoint curve) 
                      1e-6 
               ) 
           ) 
           (> d1 d2) 
      ) 
    (progn 
      (setq tl (vlax-curve-getdistatparam 
                 curve 
                 (vlax-curve-getendparam curve) 
               ) 
            d0 (- tl d1) 
            d  (* (+ d0 d2) 0.5) 
      ) 
      (if (> d d0) 
        (vlax-curve-getpointatdist curve d) 
        (vlax-curve-getpointatdist curve (+ d1 d)) 
      ) 
    ) 
    (vlax-curve-getpointatdist curve (* (+ d1 d2) 0.5)) 
  ) 
)

q3_2006 · 发表于 2014-8-7 09:09:59

只写了闭合....这就补齐...

账号		自动登录	找回密码
密码			立即注册

[原创] 关于曲线两点间中点

马上注册，结交更多好友，享用更多功能，让你轻松玩转社区。