Muaj ntau ntau cov qauv kev ua qauv hauv Maya, tab sis ib qho ntawm cov txheej txheem thawj zaug pib feem ntau qhia yog yuav ua li cas los tsim cov duab geometry los ntawm kev hloov qhov nkhaus ib ncig ntawm qhov pivot.
Nyob rau hauv lub sijhawm ntev, nws yog cov txheej txheem uas koj yuav tsis tas siv ntau npaum li cov extrude lossis ntxig cov cuab yeej siv lub voj voog, tab sis nws yog cov khoom siv zoo tshaj plaws vim nws tso cai rau cov pib tshiab pom cov txiaj ntsig tau sai heev.
Kev hloov txoj kab nkhaus yog txoj hauv kev yooj yim thiab yooj yim rau cov qauv khob, phaj, vases, txhua kab - txhua lub cylindrical geometry uas radiates los ntawm lub hauv paus ntsiab lus. Siv cov nkhaus, tus qauv tuaj yeem tsim cov duab radial nyuaj heev hauv lub sijhawm me me.
Nyob rau hauv tas li ntawm qhov kev qhia no, peb yuav dhau los ntawm cov txheej txheem ntawm kev ua qauv ntawm lub raj nplaim champagne yooj yim los ntawm kev hloov lub nkhaus.
Ua ntej peb nkag mus rau hauv kev ua qauv, ntawm no yog ob peb lub ntsiab lus ceev txog kev nkhaus hauv Maya.
Control Vertices
Curves yog tsim los ntawm cov ntsiab lus hu ua control vertices (CVs). Tom qab kos duab nkhaus, nws cov duab tuaj yeem hloov kho los ntawm kev xaiv CV thiab txav nws raws x, y, lossis z-axis. Nyob rau hauv daim duab saum toj no, CVs tshwm sim li me me liab doog squares. Qhov thib peb tswj vertex ntawm hauv qab ntawm sab laug nkhaus yog tam sim no xaiv rau kev txhais lus.
EP vs. CV Curves
Thaum koj mus kos qhov nkhaus, koj yuav pom tias koj muaj kev xaiv ntawm EP lossis CV nkhaus cov cuab yeej. Qhov zoo tshaj plaws uas yuav tsum nco ntsoov txog EP thiab CV nkhaus yog tias qhov kawg tshwm sim yog tib yam. Qhov sib txawv ntawm ob qho tib si yog tias nrog cov cuab yeej EP, tswj cov vertices dag ncaj qha rau ntawm qhov nkhaus nws tus kheej, thaum cov ntsiab lus tswj ntawm CV nkhaus ib txwm poob ntawm sab convex ntawm kab. Siv qhov twg los tau yooj yim dua.
Curve Degree
Koj tuaj yeem pom peb tau mus tom ntej thiab kos tawm ob lub nkhaus thiab muab tso rau ntawm ib sab. Ob txoj kab nkhaus yog qhov zoo ib yam, tshwj tsis yog qhov tseeb tias ib qho yog du thiab lwm qhov yog linear. Nyob rau hauv lub thawv xaiv curvature, teem lub degree rau 1 (linear) rau angular duab, thiab 3 (cubic) rau cov sawv daws yuav du.
kev taw qhia
Nws tsim nyog sau cia tias NURBS nkhaus hauv Maya muaj cov kev taw qhia tshwj xeeb. Pom ob lub voj voog liab kos rau ntawm daim duab saum toj no. Qhov nkhaus ntawm sab laug muaj nws keeb kwm hauv qab, txhais tau hais tias nws ntws los ntawm hauv qab mus rau saum. Qhov nkhaus ntawm sab xis yog thim rov qab thiab ntws saum toj mus rau hauv qab. Txawm hais tias nkhaus kev taw qhia tsis muaj teeb meem thaum siv lub revolve muaj nuj nqi, muaj lwm yam kev khiav hauj lwm (xws li extrusion) uas coj directionality rau hauv tus account.
Drawing the Profile Curve
Nws yooj yim dua los tsim qhov nkhaus hauv ib qho ntawm Maya lub koob yees duab orthographic, yog li hloov tawm ntawm lub vaj huam sib luag pom, ntaus spacebar. Qhov no yuav ua rau Maya plaub lub vaj huam sib luag layout.
Txawj tus nas kom nws txav mus rau sab lossis lub qhov rais pem hauv ntej thiab ntaus lub spacebar dua kom ua kom tiav lub vaj huam sib luag.
Txhawm rau nkag mus rau CV Curve cuab yeej, mus rau Create -> CV Curve Tool, thiab koj tus cursor yuav tig mus ua tus ntoo khaub lig- plaub hau. Txhawm rau tso qhov chaw tswj, nyem qhov twg hauv qhov rais. CV Curves yog du los ntawm lub neej ntawd, tab sis Maya tsis tuaj yeem cuam tshuam qhov smoothness kom txog rau thaum koj tau tso peb qhov vertices - qhov nkhaus yuav tshwm tawm kom txog thaum koj tau ua tiav.
Thaum tso CVs, koj tuaj yeem xa lawv mus rau kab sib chaws los ntawm kev tuav x. Qhov no yog qhov muaj txiaj ntsig zoo kawg thaum tsim qauv kev ua si ib puag ncig.
Creating a Profile Curve
Tau tsim lub tshuab raj champagne, peb yuav siv cov cuab yeej CV nkhaus los kos tawm ib nrab ntawm cov duab. Snap thawj taw tes rau lub hauv paus chiv keeb, thiab txuas ntxiv kos duab profile los ntawm qhov ntawd. Xa mus rau qhov ua tiav nkhaus hauv daim duab saum toj no, thiab nco ntsoov - koj tuaj yeem hloov kho txoj haujlwm ntawm CVs tom qab, yog li tsis txhob tawm hws yog tias koj tsis tau txais lawv thawj zaug.
Ua si nrog cov cuab yeej nkhaus kom txog thaum koj tau txais cov duab profile uas koj zoo siab nrog. Thaum tag nrho koj cov kev tswj hwm nyob rau hauv qhov chaw, ntaus enter los tsim qhov nkhaus.
Tam sim no, kev ua haujlwm nyuaj tiav.
Yuav kom ua tiav lub raj nplaim champagne, xyuas kom tseeb tias koj nyob hauv surfaces module.
Nrog rau qhov nkhaus xaiv, mus rau surfaces -> revolve thiab xaiv lub thawv xaiv los nqa lub qhov rais uas pom hauv daim duab saum toj no.
Nyob rau hauv rooj plaub no, kev teeb tsa lub neej ntawd yuav ua haujlwm zoo kawg nkaus, tab sis muaj ib lossis ob qho kev xaiv peb yuav tsum tau saib ntawm:
- Axis: Ntau zaus dua tsis yog koj yuav tig mus ncig lub neej Y-axis, tab sis x thiab y muaj yog tias koj xav tau.
- Output Geometry - NURBS lossis Polygons: Daim Ntawv Ceeb Toom, koj tuaj yeem tso tawm NURBS nto lossis ib qho khoom siv polygon. Txog tam sim no, NURBS tuaj yeem nyob xaiv tau, tab sis yog tias koj tus qauv yuav xaus rau hauv lub tshuab ua si, nws yog ib lub tswv yim zoo uas yuav tsum siv polygons.
- Start & End Sweep: Yog tias koj tsis xav kom koj qhov nkhaus tig mus rau tag nrho 360 degrees, koj tuaj yeem hloov tus nqi cheb kawg. Tig ib qho nkhaus los ntawm 90 degrees tuaj yeem pab tau rau kev tsim cov fab sib npaug hauv kev tsim qauv.
Click revolve kom tiav mesh.
Tiav
Nco koj. Los ntawm kev siv Maya's revolve nkhaus cuab yeej peb tau tswj los ua qauv zoo me ntsis champagne flute nyob rau hauv tsis muaj sij hawm.
