CAD画缓和曲线lisp程序.doc

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1、CAD中画缓和曲线，首先复制本文☆后面的源程序保存至cad安装目录的SUPPORT文件夹，保存类型为.lsp可以随便复制一个SUPPORT文件夹内的lsp文件，然后替换本文的程序。打开CAD后，输入appload回车，找到你保存的缓和曲线lsp程序，点击加载，然后就可以画缓和曲线了。首先，要画出缓和曲线的两条直线，然后输入HH回车，按提示完成缓和曲线。注：本程序，缓和曲线段拟合长度为0.4m，如需更改拟合长度，将程序的第8行(repeat(FIX(/Ls0.4))及9行(setql(+l(/Ls(FIX(/Ls0.4))))中的0.4修改即可。☆;;多义线摹拟缓和曲线。;;输入起止直线

2、、半径、缓和曲线长或设计车速。;;命令：HH(defuncom_p()(setql0)(command"ucs""o"(list(-0x1)00))(command"pline"(list000)"w""0"""(repeat(FIX(/Ls0.4))(setql(+l(/Ls(FIX(/Ls0.4))))x(+(-l(/(*lllll)40CC))(/(*lllllllll)3456CCCC))y(*id__(+(-(/(*lll)6C)(/(*lllllll)336CCC))(/(*lllllllllll)42240CCCCC))));setq(command(listxy0)))

3、;repaet);command(setqpt5(trans(listxy0)10)));com_p(defunll_v()(setqV(getreal"GiveVelocity:")Ls1(*V0.85)Ls2(/(*0.0357VVV)R)Ls(maxLs1Ls2(/R9))Ls(*(fix(/Ls10))10.0));setq(if(>LsR)(setqLsR))(ll_d));ll_v(defunll_d()(setqos(getvar"osmode"))(setvar"osmode"0)(setqC(*LsR)q(-(+(-(/Ls2)(/(*LsLsLs)240RR))

4、(/(*LsLsLsLsLs)34560RRRR))(/(*LsLsLsLsLsLsLs)8386560RRRRRR))pt1(cdr(assoc10(entget(carp1))))pt2(cdr(assoc11(entget(carp1))))pt10(polarpt1(anglept1pt2)(/(distancept1pt2)2))pt3(cdr(assoc10(entget(carp2))))pt4(cdr(assoc11(entget(carp2))))pt20(polarpt3(anglept3pt4)(/(distancept3pt4)2))p(+(-(/(*LsLs)

5、24R)(/(*LsLsLsLs)2688RRR))(/(*LsLsLsLsLsLs)506880RRRRR))jd(interspt1pt2pt3pt4nil)alf1(anglept10jd)alf2(anglept20jd)alf(-(anglejdpt20)alf1));setq(if(or(>alfpi)(and(alf(-0pi))))(progn(setqid__-1)(if(>alfpi)(setqalf(-(+pipi)alf))(setqalf(absalf))));progn(progn(setqid__1)(if(<=alf(-0pi))(set

6、qalf(+pipialf))));progn);if(setqx0(/(*(+pR)(sin(/alf2.0)))(cos(/alf2.0)))x1(+x0q)Cl(+(*alfR)Ls)E(-(/(+Rp)(cos(/alf2)))R));setq(command"ucs""o"jd)(command"ucs""z"(/(*180alf1)pi))(com_p)(setqpt6pt5)(setqppt1(listx100))(command"ucs""")(command"ucs""o"jd)(command"ucs""z"(/(*180alf2)pi))(setqid__(-0i

7、d__))(com_p)(setqppt2(listx100))(command"ucs""")(if(>(abs(distancejdpt1))(abs(distancejdpt2)))(setqptt1pt1)(setqptt1pt2));if(setqptt2(polarjdalf1(-0x1)))(thhp1ptt110)(thhp1ptt211)(if(>(abs(distancejdpt3))(abs(distancejdpt4))