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μAutoCAD R12ṩһʮõĹߡͨļһμɣ*/ԼǺ㡣ʹûʹAutoCADͼУڲжü㣬AutoCADĽֱΪĲʹáҪǣһļͬAutoCADμ㡣֮ļӼ㣬ʹAutoCADOSNAPģʽ׽Ļϵ㣬Զ㼸㡣ֱཻߵĽ㣬ֱϵĵȷֵȡ⣬AutoCADμмʸͷߵĹܡȻAutoCADμĹܣͲһһС 
ʹAutoCADͼУҪȷһЩ޷ֱӸĵ㡣磬е㣻ֱⷽеԲԲģԼֱȷֵȡͨ˵CADͼĶλ⡣ʵϣͼϣλǷ񷽱;ȷֱӰͼЧʺٶȡˣӦóAutoCADμļ㹦ܣʵAutoCADͼеĿٶλ 
ʾCommand¼CAL򼤻ʽ˵ĸ˵ʰȡмμ˵AutoCADμCALҲһ͸ʱμ⣬AutoLISPʹCAL 

AutoCADμļ㹦ʵAutoCADͼоļٶλʵ 
1ʵȷе 
ﲻʵ֮仭һOSNAPMIDģʽõе㡣磬ҪһԲĺһֱߵĶ˵֮Ϊ㻭һֱߡ£ 
Command: line 
From point: 'cal (μ) 
>> Expression: (cen+end)/2 (ʽOSNAPcenendģʽʱ洢Ԫ) 
>> Select entity for CEN snapù겶׽Բ) 
>> Select entity for END snapù겶׽ֱߵĶ˵) 
To point: 
Ŀ겶׽ģʽintins tanȵȾڼμʽʹáñʽ(curcur)/2ʽ(cen+end)/2ڼҪʱ趨OSNAPʽ׽ĵ㡣 
2ȷһֱϵȷֱֵ߶˵㶨ĵ 
ʹüμṩpltpldĻһ˵ΪABֱߣҪֱϻ÷ֱ߶ABΪ12ĵ㡣ԻֱΪ£ 
Command: line 
From point: 'cal 
>> Expression: plt(end,end,1/3) 
>> Select entity for END snapù겶׽˵A) 
>> Select entity for END snapù겶׽˵B󼴵õAΪ1/3߶γĵ) 
To point: 
ҪõֱϾ˵AΪ5ĵ㣬ʹúpld(end,end,5)еplt(end,end,1/3)ɡ 
3ȷ 
ڻͼУҪһ߻һߣǲ̣ 
Command: line 
From point: 'cal 
>> Expression: end+[2,3](͵) 
>> Select entity for END snap׽һ׼ֱߵĶ˵󼴿ɻþ˵λ(23)ĵ) 
To point: 
ܺAutoCAD R13ṩFromĿ겶׽ģʽơ 
4һбеԲԼԲһԲ 
AutoCADģʽ׵ػʹֱ߻ˮƽеԲһбеԲҪ׼ȷȷԲġ£ 
Command: circle 
3P/2P/TTR/<Center point>: 'cal 
>> Expression: cur+3*nee(curʾùĻʰȡһ㣬nee˵ʸķߣ3Բİ뾶) 
>> Enter a point:nea(ùֱϲ׽һΪԲֱߵе) 
to >> Select one endpoint for NEEù겶׽ֱߵһ˵) 
>> Select another endpoint for NEEù겶׽ֱϵһ˵) 
Diameter/<Radius> <1.6745>: 3(Բİ뾶󼴿ɻԲ) 
ı겶׽ֱ˵˳ֱߵһ໭Բ 
ԲһֱߵĽԲߵĲ£ 
Command: line 
From point: int(׽) 
of 
To point: 'cal 
>> Expression: int+3*nor(cen,int) 
>> Select entity for INT snapù겶׽) 
>> Select entity for CEN snapù겶׽Բ) 
>> Select entity for INT snapù겶׽㼴ӽΪ3֪Բ) 
To point: 
5һбϵ֪бߵĴ 
ΪǷˮƽǴֱֱԲAutoCADģʽֱߵĴߡüμֱӻбߴֱΪȷȵֱߡʵһȷߵһ˵⡣£ 
Command: line 
From point: mid(ֱߵе) 
of 
To point: 'cal 
>> Expression: mid+5*nee(5Ǵߵĳ) 
>> Select entity for MID snapùѡб߲׽е) 
>> Select one endpoint for NEEù겶׽ֱߵĶ˵) 
>> Select another endpoint for NEEù겶׽ֱߵһ˵) 
to point: 
ͬı겶׽ֱ߶˵˳Ҳֱߵһ໭ߡ
