Daim Duab 3D nrog AutoCAD - Tshooj 8

37.1.5 Propellers

Nyuaj hais lus, hauv Autocad ib lub helix yog ib txoj kab ntawm cov qauv geometry hauv 3D qhov chaw. Nws yog ib qho qhib qaum nrog ib lub voj voos, ib lub vojvoog loj thiab ib qhov siab. Tsim kom muaj ib lub txiv hmab txiv ntoo uas peb siv lub khawm nrog tib lub npe nyob hauv Txoj Kev Teeb Tsom ntawm Tsev Tsev. Lo lus txib qhov rai yuav thov lub hauv paus ntawm lub hauv paus, tom qab ntawd lub vojvoog ntawm lub hauv paus, ces lub sab saum toj vojvoog thiab, thaum kawg, qhov siab. Peb kuj muaj kev xaiv los xyuas seb muaj pes tsawg tus lem thiab txoj kev taw qhia ntawm lub tsev kawm ntawv, ntawm lwm tus. Yog hais tias lub hauv paus thiab sab saum toj vojvoog sib npaug zos, ces peb yuav muaj lub cylindrical helix. Yog tias tus nqi ntawm lub txoos thiab sab saum toj siab txawv, ces peb yuav muaj qhov sib xyaw hlau. Yog hais tias lub voj voos luj thiab qhov dav saum nruab ntug txawv thiab qhov siab yog sib npaug rau zero, ces peb yuav muaj qhov muab xauv rau hauv 2D chaw, zoo li peb tau kawm hauv seem 6.5.
Vim hais tias nws yog ib tug spline, cov propellers yuav tsum yog ib qho laj thawj los kawm tshooj 36.1. Txawm hais tias koj saib zoo zoo, khawm kos lawv yog ntawm cov khoom kos duab 2D, xws li duab plaub thiab voj voog. Ua li cas tiag tiag yog qhov kev hais kom ua no feem ntau nrog rau kev hais kom ua kev sib tsoo, uas peb tau pom hauv 37.1.2 seem, yog li ntawd nrog koj tau tsim cov khoom khib nyiab rau hauv lub caij nplooj ntoo hlav hauv txoj kev yooj yim thiab ceev ceev. Rau qhov no peb siv lub voj voog uas ua hauj lwm raws li ib qho profile, lub kiv cua, ntawm chav kawm, yuav ua hauj lwm raws li ib tug trajectory.

37.2 Primitives

Peb hu ua txheej thaum ub cov khoom qub: kab plaub fab, voos, lub plhaub, lub khob hliav qab, kab npoo thiab qhov nraub qaum. Koj tuaj yeem pom tias daim ntawv teev npe ntawm ob qho no rau hauv qhov Kev Xam Phaj ntawm Tsev tab, thiab hauv seem hauv feem ntawm qhov tab. Raws li tus nyeem ntawv tuaj yeem xav tau, thaum lub sij hawm ntawm kev tsim kho, lub qhov rai lo lus nug xav tau cov ntaub ntawv raws li cov lus nug. Qhov tseeb, ntau cov ntaub ntawv thiab qhov kev txiav txim uas Autocad tau thov lawv, coincide nrog cov 2D khoom uas lawv tau muab. Piv txwv, kom tsim tau tus kheej AutoCAD, koj yuav thov kom lub chaw thiab lub vojvoog qhia, xws li nws yog lub voj voos. Nyob rau hauv cov ntaub ntawv ntawm ib lub rectangular prism, cov kev xaiv pib tag nrho cov uas peb siv los kos ib tug duab plaub, ntxiv rau qhov siab, tau kawg. Rau cov pyramids peb kos ib tug polygon ua ntej, thiab cetera. Li ntawd, nws tsis yog kaw tsis tau xav txog qhov tseem ceeb ntawm kev paub txog 2D cov cuab yeej kos duab raws li qhov yuav tsum tau ua rau kos duab 3D.
Wb pom ces dab tsi tsis tsim nyog los kos cov hom sib txawv ntawm cov txheej txheem uas peb tau teev tseg. Nws tsis mob siab qhia tias koj ua cov primitives ntawm koj qhov kev txiav txim siab ntawm koj lub computer los ntawm kev sim nrog cov kev xaiv ntawm txhua tus ntawm lawv.

Ntawm qhov tod tes, yog tias peb siv lub hom phiaj uas pom tau hais tias cov kab sib txuas ua ke, raws li peb pom nyob rau hauv 35.6 seem, tom qab ntawd, qhov tseem ceeb, qhov sib txawv ntawm cov khoom sib xws yog 4 kab. Qhov sib tw uas txiav txim tau seb cov kab uas sawv cev cov khoom yog Isolines. Yog tias peb sau qhov txawv ntawm qhov hais kom ua qhov rai thiab hloov nws cov nqi, ces cov khib nyiab tuaj yeem muaj tuaj nrog ntau cov kab, tab sis, ntawm chav kawm, uas yuav ua teeb meem rau kev ceev ntawm kev txua khoom. Tiag tiag qhov kev hloov yog nyob ntawm yeem, vim cov khoom ntawm cov khoom tsis hloov.

37.3 Polysolids

Ntxiv rau qhov primitives, peb muaj peev xwm tsim tau cov khoom ua tau los ntawm polylines thiab hauv consonance nrog lawv, cov no hu ua polysolids.
Polysolids yuav to taub raws li cov khoom uas tsim los ntawm extruding, nrog qee qhov siab thiab dav, kab thiab cov kab. Ntawd yog, tsuas yog kos nrog cov kab lus no thiab cov kab kos (zoo li cov polyline) thiab Autocad yuav hloov lawv mus rau hauv ib yam khoom nrog qhov dav thiab qhov siab uas tau teeb tsa ua ntej pib qhov khoom. Yog li ntawd, ntawm cov kev xaiv tib yam no, peb tuaj yeem taw tes rau ib lub qauv, los yog lwm 2D khoom xws li cov kab, cov hlua lossis cov voj voog, thiab cov no yuav yog ib qho polysolid. Cia peb pom ib co qauv uas cia peb siv lawv txoj kev xaiv.

37.4 Compound solids

Cov khib nyiab sib xyaw yog tsim los ntawm kev sib txuam ntawm ob los yog ntau tshaj tawm ntawm txhua yam: txheej thaum ub, kev sib tw, kev sib tw, kev sib tshua thiab kev sib tw thiab muaj peev xwm raug tsim los nrog cov hau kev hauv qab no.

37.4.1 Ntuag

Raws li lub npe implies, nrog cov lus txib no peb tau txiav txhua yam khoom los ntawm specifying txiav dav hlau thiab qhov point ntawm lub dav hlau yuav tau thov. Peb kuj yuav tau xaiv yog tias ib qho ntawm ob feem tawm raug tshem tawm lossis yog tias ob leeg raug khaws tseg. Cov lus hais qhov rai qhia tag nrho cov kev xaiv muaj los txhais cov dav hlau txiav, lossis siv lwm yam khoom uas txhais cov dav hlau.