TSHOOJ 12: parametric xyuas
Thaum peb siv qhov siv los xaus cov khoom, lossis chaw nruab nrab, piv txwv li qhov peb tau ua yog yuam cov khoom tshiab los qhia tawm ib qho taw tes ntawm nws qhov kev ntsuas nrog lwm yam khoom uas twb tau kos. Yog tias peb siv "Parallel" lossis "Perpendicular" siv, tib qhov tshwm sim, peb tab tom yuam cov txheej txheem geometric ntawm cov khoom tshiab nrog rau kev hwm rau lwm tus, yog li ntawd nws tsis sib thooj los yog sib tshuam, nyob ntawm rooj plaub thiab ntawm lwm cov kev xaiv, qhov khoom tshiab tsis tuaj yeem raug tsim
"Parametric Txwv tsis pub tuaj yeem" tuaj yeem pom tias yog kev txuas ntxiv ntawm tib lub tswv yim uas txhawb nqa cov ntawv xa mus rau cov khoom. Qhov txawv yog tias qhov teeb tsa kev teeb tsa geometric tseem nyob ntawm qhov yuav tsum ua kom qhov khoom tshiab yuav tsum tau ua tiav tas mus li, lossis theej, raws li kev txwv.
Yog li, yog tias peb tsim kom muaj ib kab li perpendicular mus rau lwm, ces txawm ntau npaum li cas peb hloov lwm tus kab, qhov khoom nrog kev txwv yuav tsum nyob twj ywm nyob rau hauv perpendicular.
Raws li yog cov zajlus, daim ntawv thov ntawm kev txwv ua rau kev txiav txim siab thaum peb hloov qhov khoom. Ntawd yog, tsis muaj kev txwv peb tuaj yeem hloov tau rau ib daim duab, tab sis raws li cov kev tshwm sim no, cov kev hloov pauv tsawg. Yog tias peb yuav kos duab nrog Autocad ib qho khoom uas twb muaj lawm uas tsis tas yuav muaj kev hloov, ces nws tsis ua ib qho kev txiav txim siab siv ib co kev txwv tsis pub hnyav rau hauv qhov teeb duab no. Yog hais tias, nyob rau lwm yam tes, yog ua ib qho ntawm ib lub tsev los yog ib tug txhua yam yog ib feem uas nws zaum kawg shape're tseem tab tom nrhiav, ces parametric xyuas yuav pab tau vim hais tias lawv tso cai rau peb mus khaws cov tsau cov kev sib raug zoo ntawm cov khoom, los yog qhov ntev, peb tsim yuav tsum ua raws li.
Siv lwm txoj kev: kev ntsuas tus kheej tsis zoo yog qhov cuab yeej rau kev paub tab, vim tias nws tso cai rau peb kho cov ntsiab lus uas cov duab geometric los yog cov kev sib raug zoo yuav tsum nyob ruaj khov.
Muaj ob hom kev txwv txwv: Geometric thiab Cota. Cov thawj cov lus qhia meej txog cov duab ntawm cov khoom siv (lub nraub qaum, sib npaug, ntsug, thiab lwm yam), thaum cov neeg tsim muaj cov kev txwv (qhov nruas, cov ces kaum thiab cov lus nrog ib tus nqi). Piv txwv, ib txoj kab yuav tsum nco ntsoov 100 units los yog ob kab ntawv yuav tsum tsim ib lub kaum ntawm 47 ° degrees. Nyuam qhuav, dim kev txwv tuaj yeem tau hais tias cov equations, yog li qhov kawg qhov dav ntawm ib yam khoom yog ib qho tseem ceeb ntawm qhov tseem ceeb (tus nqi zog los yog qhov tseem ceeb ntawm) uas qhov kev ua zauv yog tsim.
Vim peb tab tom kawm txog cov cuab yeej los ntawm 16 tshooj, peb yuav pom qhov no kom tsim, saib thiab tswj cov kev ntsuas ntawm kev ntsuas, tab sis peb yuav rov qab mus rau hauv tshooj ntawv ntawd.