Mus tob nrog NextEngine scanner kws muaj txuj Dan Gustafson
Thaum tsim cov khoom 3D siv siv CAD, qhov kev ua qauv nrov tshaj plaws yog siv "polygon mesh" los sis " N on- R" B lub tuam txhab "(NURBS) los piav txog yam khoom ntawd.
Ntawm txoj kev los tsim ib qho ntaub ntawv rau 3D luam ntawv, feem ntau CAD program cia koj hloov cov ntaub ntawv rau STL hom (uas yog hloov nws mus rau ib lub duab thawv polygon mesh), yog li koj xav tau yog tias koj yuav tsum tsim qhov khoom nrog mesh los ntawm pib los sis yog tias nws zoo dua rau kev ua hauj lwm hauv NURBS thiab ua qhov hloov dua siab tshiab.
Peb xam Dan Gustafson los ntawm NextEngine , uas yog 3D lub lag luam scanner, los xyuas cov ntsiab lus ntawm qhov ob hom loj ntawm 3D qauv.
Raws li lub computer qauv hloov mus, NURBS yuav tsim cov duab zoo. Nws tseem yuav tsim cov qauv zoo tshaj nrog cov npoo uas tsis muaj pixilated. Kev tsim qauv rau kev tsim vaj tse thiab cov khoom siv kho tshuab, NURBS-based computer rendering yog qhov zoo dua rau cov kev cai lij choj uas muaj kev sib txawv. Feem ntau, thaum koj luam cov khoom mus rau hauv ib qho kev pab cuam CAD, lawv tau pib siv cov ntawv NURB
Thaum koj ua haujlwm nyob rau hauv NURBS, koj yog nruab nrab ntawm qhov nkhaus ntawm cov ntsiab lus. Cov ntsiab lus yuav tsim ib lub dab ntawm saum toj kawg nkaus. Txhawm rau kho qhov nkhaus, koj yuav tsum kho cov ntsiab lus ntawm lub ntsej muag. Qhov no yuav ua tau me ntsis nyuaj rau tus tswv.
NURBS muaj nws cov kev txwv. Vim tias nws yog daim ntawv twv daim ntawv 2-dimensional, koj yuav tsum tsim cov "ploj" uas koj muab tso ua ke thiaj li ua tau zoo dua 3-seem zoo. Qee zaum, cov thaj ua rau thaj no tsis haum uake zoo thiab "nqaws" tshwm. Nws yog qhov tseem ceeb heev uas yuav tau saib kom zoo zoo ntawm koj tus kwv thaum tsim tawm thiab xyuas kom tseeb tias cov nqaws npua los ua ke zoo ua ntej koj hloov mus rau mesh rau STL cov ntaub ntawv.
Polygon mesh tau tsim tshwjxeeb rau kev ua haujlwm 3-seem ntawm lub computer. Vim li no, nws yog hom siv los ntawm STL cov ntaub ntawv. Thaum siv cov vaj tse peb los tsim cov qauv duab, koj tsim tau tus qauv ntawm tus npoo ntawm ntug. Koj yuav tsis ua tiav qhov zoo meej smoothness ntawm tus duab pib tsim hauv NURBS, tab sis lub mesh yog yooj yim rau cov qauv. Koj tuaj yeem thawb thiab rub tus mesh txav nws thiab ua tiav tib lub sij hawm vim nws tsis xam cov zauv nruab nrab ntawm cov ntsiab lus.
Thaum koj ua haujlwm nyob rau hauv NURBS thiab hloov cov ntaub ntawv rau hauv lub mesh, koj tuaj yeem xaiv koj qhov kev daws teeb meem. Kev daws teeb meem loj muab koj cov curves smoothest rau cov khoom koj tau luam tawm. Txawm li cas los xij, kev daws teeb meem loj txhais tias koj yuav muaj ntaub ntawv loj. Qee zaum, cov ntaub ntawv tej zaum yuav loj heev rau lub tshuab luam ntawv 3D los lis.
Ib cag ntawm qhov kev pom zoo ntawm txoj kev daws teeb meem thiab cov ntawv me me, koj siv tau lwm txoj kev tu kom txo koj cov ntawv loj. Piv txwv li, koj yuav tau ua kom paub tseeb tias thaum koj npaj cov khoom koj tsis tsim sab hauv uas tsis pub luam tawm. Ib txoj kev zoo li no yuav tshwm sim yog tias koj tuaj yeem ua ob daim duab ua ke, qee zaum qhov chaw sib txuas lus tseem nyob rau hauv, txawm tias, thaum lawv sau, lawv yuav tsis yog cov seem sab nraud.
Seb koj puas tau pib ua koj cov khoom siv NURBS los yog mesh nyob ntawm seb koj nyiam. Yog tias koj xav tau kev pab cuam uas yooj yim dua uas koj yuav tsis tau hloov, pib hauv qhov chaw mesh yuav yog qhov zoo tshaj plaws. Yog tias koj xav tau ib qho kev pab cuam uas ua rau koj zoo meej curves, koj yuav tsum xaiv ib qho uas siv cov NURBS (Rhino yog ib qho piv txwv uas ua, qhov tseeb, lawv muaj ib tus zoo nkauj: NURBS yog dab tsi?).
Kuv mam li kaw qhov laj thawj no nrog qhov no: Qhov 3D Design program uas koj nyiam tshaj nrog, feem ntau, yuav muaj kev xaiv los tawm koj cov NURBS los yog Mesh cov ntaub ntawv rau STL lossis lwm hom 3D-printing. Thaum kawg, peb yuav ua raws li cov lus ntuas ntawm Sherri Johnson, los ntawm CatzPaw, uas peb xam phaj rau cov lus qhia thiab hom kev kawm: Kho cov Ntaub Ntawv 3D nrog Meshmixer thiab Netfabb .
"Cov ntaub ntawv STL yuav tsum tau qhib rau hauv ib qho kev pabcuam hluav taws xob uas muaj peev xwm kuaj xyuas cov teeb meem thiab kho cov teeb meem, los yog txiav txim siab los yog kev ua haujlwm. Qee qhov kev pab cuam slicing (xws li Simplify3D) muab cov cuab yeej siv kho raws li qee qhov kev pab cuam CAD (SketchUp extensions). Cov ntaub ntawv teev npe uas yog pub dawb, thiab muaj cov cuab yeej tshaj plaws yog Netfabb thiab MeshMixer . "
Lwm cov kev pabcuam zoo rau kev nkag siab txawv cov qauv qauv yog los ntawm 3D luam tawm kev pabcuam bureau (uas peb hais Sculpteo thiab Shapeways, rau lub npe ntawm ob peb leeg). Cov tuam txhab no yuav tsum tau ua cov hom ntaub ntawv thiab cov ntawv tawm los ntawm txhua qhov 3D tsim cov kev pab cuam hauv ntiaj chaw thiab feem ntau muaj cov tswv yim thiab cov tswv yim kom tau txais koj cov ntaub ntawv kom luam tawm txoj cai.
Ntawm no yog ib qho ntawm Sculpteo uas qhia txog kev siv Rhino 3D, uas yog. Koj tuaj yeem paub txog kev siv Meshmixer los yog Autodesk Inventor los yog Catia lossis Blender hauv ntu Sculpteo: 3D Printing Tutorials: Npaj qauv rau 3D luam ntawv .
Vim tias muaj ntau cov animators thiab computer graphics ua haujlwm rau 3D luam ntawv nrog kev tsim cov cim, Shapeways muaj ib qho uas haum haum tus nqi: Yuav Npaj koj Render / Animation Model rau 3D Printing.
Stratasys Direct Manufacturing (yav dhau los RedEye) muaj ib qhov zoo tshaj plaws rau Kev Npaj Ua Ntaub Ntawv Khw STL uas peb sib qhia nyob ze qhov kawg ntawm peb cov ntaub ntawv STL .