Trong khi t~o l~p ban ve b~ thuOng xuy~n phai bien t~p: dy xoa, ph~c h6i d6i tuqng bi xoa, dich chuyen, quay, thu ph6ng, !tty d6i xUng. sao chep, hi¢u chloh ... cae d6i tUq£1g ve, va d.c l¢nh tra cUu (Inquiry) ve d.c dG' li¢u (mAD, lOp, dQ ri?ng net. .. ), khoang each, di¢n tich, vv ... nhtrng muon HUn dieu do vi¢c d~u tien AutoCAD doi hoi h<.m phai Iva chQn d6i tuqng (Select Object).
3.1. CHON DOl TlfONG (SELECT) . . * each g<?i l¢nh SELECr tll Menu:
,---~~~-,
Screen Menu> EDIT> Select Menu Bar> EDIT> Select * GO l¢nh tir b~m phim:
Command : select .J Select object:
B;;m co the ch(;m d6i tuqng de bien t~p hay tfa cUn bang cae each sao :
+ Chi di~m: b~n dung con chuQt chi vao d6i tUqTlg cAn chQn reli ohlin phim trAi chuQt, c(i.ng co the: vao tQa dQ ella diem thUi)C d6i tm;mg do.
+ ALL: chQn tilt ca nhiing hloh co trong ban ve.
+ Last: chQn d6i nrqng vila ve xong .
+ Previous: chQn cac d6i nrqng vita chQn tnt6'c do.
+ Window: chQn cac d6i tuqng n~m IQt trong clla sO chu nh;}t .ma b~ xAc dinh. + Crossing: ch<;>;n d.c d6i tU'gng rna m¢t ciIa 56 ehlia ho~c cit ngang qua chung. + WPolygon: chuc nang nay gi6ng window chi khAc la elra 56 do b~ .4-0 ra la hlnh da giAc.
+ Cpolygom gi6ng nhu Crossing, chi khAc l3. eua sO ~ t<;10 ra la mQt da giac.
+ Undo: di! b6 di d6i tuQllg vira ch90.
+ Remove: khi chQn nhieu d6i tuqng rna muon 10<;li bo mQt d6i tuqng nao do ta ehQn R ·sau dong nhac "Select object:" va ACAD nhile b<;ln chQn d6i tl1qng dn gO- 00: "Remove
objects:".
+ Add: tat che dQ "Remove", co the tiep tl,le chQn them d6i tl1qng.
+ Frece (hang rao): chinh ta t<;1o m¢t dl1Cmg Polygon hO', rna rtlQi d6i tl1qng rna n6 ca.t qua se dUQ'c ehQn.
cae d6i tl1qng dl1qc ehQn se rna di. B<;1n mu6n ket thoe vi~c chQn d6i tuqng hay lin ENTER, hay nba y phim phiii ehuQt, ho~e go NULL.
3.2.TAYXOA
'" ERASE: dy xoa mQt hay nhieu d6i tl1qng ve.
* each gc;>i l~nh ERASE til Menu:
,---,
* Go l~nh-tu ban phim: Command:
Screen Menu> EDIT> Erase Menu Bar > MODIFY > Erase
erase
Select object: <chqn d6i tuqng cAn tay x6a>
ChB y: L¢nh OOPS dung d~ khOi phl,l-c l{li d6i tuqng dti bj x6a bi'1i J¢nh ERASE (m(lc du c6 dung dc l¢nh vi! kMc,sau khi era.o;e). Ngoru m l¢nh OOPS oon &: lam hi¢n l~j de d6i tU(}Ilg bi mA:t di sau khi ~o BLOCK.
Command: oops
. BREAK: ngM b6 di I philn d6i tlTgng ve. * Oich gqi l¢nh BREAK tu Menu:
,-~---, Screen Menu> EDIT> Break Screen Menu> EDIT> Break
Menu Bar > MODIFY > Break
>1= Go l¢nh tit ban phim:
Command: break
Select object: <chi vao diem dau do~n dn x6a>
Enter second point (or F for first point): <chi vao diem thu 2 cua do~n can xoa, ho~c go F de chqn l~i diem dt\u sau d6ACAD nhac b~n chc;>n diem cuoi>. Vi d1,l duai day m6 ta qua tdnh thl!C hi~n l¢nh BREAK:
• '-.../ H'inh g6e ctH;m L":::;.. .... -d6i trn;mg J Da-nh dlfu 2 diem X6a doI!fi PIP2 '-.../ H'inh g6e ctH;m L":::;.. .... -d6i trn;mg J Da-nh dlfu 2 diem X6a doI!fi PIP2
Hiob 3·1
Chu y: Khi dung J¢nh BREAK dt x6a I cung tren dubrlg trim. bl:Ul c4:n cM y pMn cung hi x6a thee chi~\J ngU~ chi~u quay kim d6ng h6. Do v~y ~ ph<ii chu Y ChQR dian dJiu va diem cu6i cho do~ c&I x6a. vi dl,!- dum dQy, tren dmg m¢t dubrlg tron, ntu chc;m dibn dliu PI va diim cu6i Pl nhu hlnh 3-2a thl cung PIPl phfa tren bj x6a; 0'10 chc;m Pl, Pl nhu hlnh "3-2b Ihl. coog PIPl phia dum hi x6a.
P2 PI
+ PI + P2
HiDh 3-2 28
TRIM
Ch~t tia do~n thua ella d6i tuqng ve bdi cae c~nh dao dt (edge). :I: each gQi l¢nh lRIM til Menu:
r---~
Screen Menu> EDIT> Trim Menu Bar > MODIFY > T-rim * Go l¢nh tu ban phi'm:
Command: trim
Select cutting edge(s) ...
Select objects: <chQn cae dUOng Hlm qmh cAt> <Select object to trim>/Undo: <chQn do~n thua d.n cat di> Vf du duUi day m6 til qua trlnh dung l~nh TRIM (hlnh 3-3).
lfinh g6c. ell9n duimg qmh cat(PI) a.i vao d~n thtra cdn dit(Pl,P2) Hloh 3-3 -t Ket qua.
~ co the chQn chinh duemg c<;tnh dt la d6i tUl;1I1g d.o cAt bo, nhu VI dl;l sau da.y:
Hinb g6c 3.3. DItN HINH MOVE Oll;m qnb eM b~ng Crossing Hlnb 3-4 PO P P3 P4
elli vao dOl.ln thtta cAn cit
J L
Kl!t qua.
L¢nh MOVE de eli chuyen cac d6i tuQllg tUi vi trf loMc m~ loh6ng thay dOi huang va
kfch thu6c ella chung .
• Qich gQi l~nh MOVE tu Menu:
,---,
* Go l~nh tir b~m phfm: Command:
Screen Menu> EDIT> Move Menu Bar > MODIFY > Move
move
Select object: <chQn d6i tuqng d.o di chuyen> <cho diem co so, ho~c kho3.ng c3.ch dichuyen>
Base poi,Dt or displacement:
COpy
4nh nay de sao chep cae d6i tuqrtg Wi vi trl maio No gi6ng l~nh MOVE, chi ~hac Iil d6i tugng ell vAn gift nguy~n .
• Glcb gQi I~nb COpy Ilr Menu:
, - - - , Screen Menu> EDIT > Copy Screen Menu> EDIT > Copy
Menu Bar > CONSIRUcr > Copy * GO l¢nh llr ban phim:
ROTATE
Command: copy
Select object: <chqn d6i tuqng ciin sao chep>
< Base point or displacement>/Multiple: <cho diem cd sa, ho~c khoang each di chuy~n, n~u b~n chQn M HI. sao chep thanh ohieu ban> Second point of displacement: <cho diim dich Wi ho~c a'n Enter> L¢nh ROTA1E dung de quay d6i tm;mg vi! quanh m~t diem Cd sil.
* Glcb gQi I~nb ROTATE Ilr Menu:
, - - - , Screen Menu> EDIT> Rotate
Menu Bar ; MODIFY > Rotate * Go l¢nh tiI ban phim:
Command: rotate Select object: Base.point:
. <Rotation Angle>/Reference:
<ChQfl d6i tuqng can xoay> <cho diem tam xoay>
<cho g6c xoay, hay ch(;m R de cho gOc tham khao sau do cho gOc m6'i>
Chti y goc xoay duang Hi ngu«;JC chieu quay kim d6ng h6 va nguqc l~i. V( d~ dum day cbo g6c xoay I. 45 d¢ (blnb 3-5).
Hinh g6c Olqn d6i tttqng xoay b~g W. Chqn diim co sO. Kt"t qua. mnh 3~5
SCALE
L¢nh SCALE dung d~ ph6ng to ho~c thu nho d6i hlqng vi! theo ca 2 chieu x,y v6i cung m¢t ty l¢. N~u d6i tlJqDg da: dlJqc ghi kfch thlJt'1c thi sau khi SCALE. kich thlJac mai se W d¢ng cilkp nhilkt v~o.
* C8ch gQi l¢nh SCALE tu Menu:
r--;Sc:-re-e-n-=M:-:-en-u->-=E=D=IT=-->-=Sc=-a"C}e--' Menu Bar > MODIFY > Scale
>l< Go l¢nh tu ban phim:
Select object: <chQn doi tuqng de scale> Base point: <cho diem cO' sCi>
<Scale factor>/Reference:
Di dap dong nba.c nay. b(~.n cho 1 so duang 100 han 1 di ph6ng to, n~u cho so duang be han 1 se thu nho d6i tuqng. N~u b~n d8.p R nghia la b~ dung ty l¢ tham khao sau do cho ty l¢ maio Hinh 3-6 mO ta qua tdnh thao l<lc l¢nh SCALE:
Hinh g6c 0l9n d6i htqng scale
STRETCH