在AutoCAD中實(shí)現(xiàn)尺寸公差自動(dòng)標(biāo)注的探討
(作者未知) 2009/7/19
(接上頁(yè))因篇幅所限,以下數(shù)行略。
) ) 四、自動(dòng)標(biāo)注公差 為使標(biāo)注的尺寸公差與基本尺寸協(xié)調(diào),在標(biāo)注前先根據(jù)基本尺寸的字高、旋轉(zhuǎn)角等確定出公差的字高和旋轉(zhuǎn)角,并計(jì)算出上、下偏差的標(biāo)注位置,然后用“Text”命令標(biāo)注公差。程序在設(shè)計(jì)中,考慮到了只知道上、下偏差值而不知道公差等級(jí)和公差代號(hào)的情況(此時(shí)可不輸入公差等級(jí)和代號(hào),而直接輸入上、下偏差),同時(shí)也考慮到了某些特殊情形,如±0.01等等。
源程序(文件名為gcbz..lsp)如下:
(defun c:gcbz() (setq ss (entget (car (entsel)))) (setq gcdh (getstring "\n 輸入公差帶代號(hào):")) (setq p (getpoint "\n 輸入插入點(diǎn):"))
(setq dim (cdr (assoc 1 ss)))
(setq dim1 dim)
(progn
(if (= (substr dim 1 1) "R") (setq dim1 (substr dim 2)))
(if (= (substr dim 1 1) "r") (setq dim1 (substr dim 2)))
(if (= (substr dim 1 3) "%%c") (setq dim1 (substr dim 4)))
(if (= (substr dim 1 4) "\\A1;") (setq dim1 (substr dim 5)))
(if (or (= (substr dim 1 5) "\\A1;R") (= (substr dim 1 5) "\\A1;r")) (setq
dim1 (substr dim 6)))
(if (= (substr dim 1 7) "\\A1;\\U+") (setq dim1 (substr dim 12)))
);獲取各類尺寸的尺寸數(shù)值
(setq dimt (atof dim1))
(setq k (record dimt));調(diào)用函數(shù),獲取數(shù)據(jù)行號(hào)
(read k "d:/data.txt");讀取數(shù)據(jù) (if (= gcdh "") (setq gc11 (getreal "\n 輸入上偏差:") gc22 (getreal "\n 輸入下偏差:"))
)
(if (= gcdh "f6") (setq gc11 h2 gc22 h3))
(if (= gcdh "h7") (setq gc11 h1 gc22 h4));取得上、下偏差值 …… ; 以下數(shù)行從略 (setq gc1 (rtos gc11 2 4) gc2 (rtos gc22 2 4))
(setq txth (cdr (assoc 40 ss)));
(setq angr (cdr (assoc 50 ss)))
(setq hi (* txth 0.5))
(setq angd (* (/ angr pi) 180))
(setq p1 (polar p (+ (/ pi 2) angr) 0.2))
(setq p2 (polar p1 (+ (* pi 1.5) angr) (+ hi 0.8)))
(setq p3 (polar p1 angr 1.8))
(setq tole (strcat "%%p" gc1))
(if (﹥ gc11 0) (setq gc1 (strcat "+" gc1)))
(if (﹥ gc22 0) (setq gc2 (strcat "+" gc2)))
(if (= (abs gc11) (abs gc22)) (command "text" p2 txth angd tole ""))
(if (/= (abs gc11) (abs gc22))
(progn (未完,下一頁(yè))
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