Daim Duab 3D nrog AutoCAD - Tshooj 8

TSHOOJ 38: DAB TSI

Raws li hais nyob rau hauv seem 36.2.2, muaj ob hom ntawm cov khoom chaw: cov txheej txheem thiab NURBS chaw. Ob leeg yuav tsum tau tsim siv tib txoj kev raws li extrusion los yog los ntawm ib tug scan profile. Txawm li cas los txhua yam muaj yam ntxwv uas txiav txim seb lub hom qhov teeb meem peb yuav tau ua nrog lawv. Fundamentally, NURBS chaw yuav tsum edited nrog tswj vertices, uas muab ib tug loj loj txoj kev ywj pheej ntawm sculpted nto, raws li tau sib tham txog hauv qab no, tab sis muaj cov disadvantage hais tias lawv muaj peev xwm tsis tsim lawv associative mus nrog profiles uas muab lawv cov keeb kwm los yog nrog rau lwm cov nto pawg.
Meanwhile, lub chaw ntawm txoj kev tej zaum yuav txuam nrog profiles uas yog derived los yog ib pawg ntawm chaw thiab ces yuav edited raws li ib tug tib kwv. Lub tswv yim uas peb tau paub ua ntej nrog polylines. Qhov no muaj ib qho tseem ceeb implication: Koj muaj peev xwm kos ib tug 2D kwv, ib tug polyline piv txwv li, thiab ntau yam parametric txwv xws li kawm nyob rau hauv tshooj 12, nws yuav neeg ib tug saum npoo tshuab txais associativity txoj kev. Nyob rau hauv cov ntaub ntawv uas, koj yuav kho kom raug cov nto los ntawm editing lub polyline uas nws yog txuam, uas nyob rau hauv lem yuav kom parametric xyuas yuam rau nws. Raws li koj yuav nco qab, inclusive, polyline txwv uas yuav muaj xws li kev kawm txog lej tsis muab los ntawm lwm yam khoom. Piv txwv li, lub voos kheej kheej ntawm ib qho kev sib tw yuav yog ob npaug ntawm qhov ntug, thiab lwm yam.
Yog li, ua haujlwm nrog cov txheej txheem profiles nrog kev sib tham yuav tsum muaj kev npaj, tiam sis tuaj yeem pab koj tsim qhov chaw uas nws tsis muaj kev zoo txaus siab rau koj cov ntaub ntawv kev lag luam. Yog tias koj siv cov txheej txheem hauv kev koom nrog nrog kev sib tham, ces koj yuav tsum txwv koj tus kheej kom kho cov teeb meem ntawm qhov uas hloov cov profiles lossis lwm qhov chaw uas lawv muaj feem xyuam nrog. Yog tias nws rhuav txoj cai ntawd, qhov kev tawm tsam yog ploj thiab tsis tuaj yeem rov tsim dua.
Obviously, koj tuaj yeem tsim tsim txheej txheem tsis muaj kev sib txuas rau lwm yam khoom. Nyob rau hauv cov ntaub ntawv koj tuaj yeem kho lawv los ntawm grips, uas tshwm sim hauv lawv cov ntsiab lus tseem ceeb thiab / los yog lawv cov kev.
Ib qho tseem ceeb taw tes rau nco ntsoov yog hais tias koj muaj peev xwm hloov ib tug cheeb tsam ntawm txoj kev nyob rau hauv ib tug NURBS nto, tab sis yuav tsis hloov ib tug NURBS nto nyob rau hauv ib txoj kev. Txawm li cas los, yog hais tias nws yog ib tug nruj yam, piv txwv li, tsis muaj qhov, ces nws yuav hloov hais tias nto los yog NURBS chaw nyob rau hauv ib tug khoom 3D thiab ces qhov no, nyob rau hauv lem, yuav hloov dua siab tshiab rov qab mus rau hauv ib qho cheeb tsam ntawm txoj kev. Nws kuj muaj tseeb hais tias koj yuav tsum tau sim los tsim lawv tus qauv 3D nrog qhov tsawg tshaj plaws tau pauv hloov, txij li thaum nws yuav tshwm sim rau poob zoo lawm khoom nyob rau hauv ib co ntawm cov hloov.
Tab sis wb pom ib qho video uas peb tseem ceeb rau cov ntsiab lus peb tau ua ntawm no txog ob hom ntawm cov chaw uas twb muaj lawm.

38.1 Cov qauv ntawm kev tsim cov chaw

Txawm hom ntawm tej chaw uas yuav tsim (txheej txheem NURBS), feem ntau txoj kev los mus tsim lawv yuav tsum paub, txij thaum lub txoj kev yog tib yam li ib tug peb siv, los yog mus rau kos khoom 2D, los yog ib txhia khib nyiab los ntawm profiles. Cia peb pom txhua yam ntawm lawv.

38.1.1 Poob nto

Muaj ob txoj kev rau yog nqus tiaj chaw: nqus opposite fab ntawm ib tug duab plaub, uas yuav yeej ib txwm tau nyob rau hauv lub XY dav hlau ntawm qhov tam sim no SCP, tab sis tej zaum yuav tau tsa ceg rau lub axis Z. Qhov thib ob hom yog yuav xaiv ib tug kaw profile (ib lub voj voog, ib qho ellipse los yog polyline), tsis hais nws txoj hauj lwm hauv 3D qhov chaw.

38.1.2 Extrusion

Raws li koj yuav nco ntsoov thaum txheej txheem khib nyiab, siv ib yam khoom, peb tsuas qhia nws thiab ces peb yuav ntes ib qhov siab, los yog peb qhia lwm yam khoom uas ua hauj lwm raws li ib tug trajectory. Yog tias peb siv lub kaw lus kaw, qhov no yuav yog ib yam khoom los yog ib qho chaw raws li peb txhais nws thiab yog tias nws yog ib qho qhib profile, nws yuav yog qhov yuav los ntawm lub ntsiab lus. Nyuam qhuav, peb kuj tuaj yeem qhia qhov kaum ntawm inclination, uas yog siv los ntev li qhov tshwm sim tsis sib tshooj nws tus kheej, nyob rau hauv cov ntaub ntawv twg qhov saum npoo tsis yog tsim.

38.1.3 Cheb

Peb kuj yuav tsim ib tug saum npoo cheb ib profile, qhib los yog kaw, nyob rau ib txoj kev txhais los ntawm lwm 2D kwv thiab raws li nyob rau hauv cov ntaub ntawv ntawm cov khib nyiab, yuav thov tau ib tug twist thaum lub sij hawm lub PP los yog teev cov kev hloov kho nyob rau hauv lub profile ntawm nws pib loj rau nws qhov kawg loj.