Kujambula kwa 3D ndi AutoCAD - Gawo 8

MUTU XUMUMX: MALLAS

Mitundu ndi zinthu 3D zopanda thupi monga zolimba. Iwo amasiyanitsidwa ndi malo chifukwa amapangidwa ndi mawonekedwe a nkhope zomwe zimasunthirana wina ndi mzake kupyolera pamphepete ndi m'mphepete. Komanso, nkhope iliyonse imapangidwa ndi ndondomeko ya zinthu zomwe zimapangitsa kuti ziziyenda bwino. Maonekedwe a meshes, payekha kapena onse, angathe kuonjezera kapena kuchepetsa chiwerengero cha zinthu zomwe ali nazo, kuti kuwonjezera kumawonjezere kapena kuchepa. Kumbali ina, nkhope imatha kuphatikizana ndi nkhope zina kapena ngakhale kugawidwa, ndiko kuti, akhoza kuyang'ana kumaso nkhope zomwe zimapanga izo, zomwe zimachulukitsa mwayi wawo wozizira. Komabe, mfundo yomwe pulogalamuyi idzafikire, chifukwa cha kuchuluka kwa nkhope (ndipo izi ndizo ziwerengero zina) zamatope zomwe zilipo.
Ndipotu, zinthu izi zimakhala zosiyana siyana (nkhope zawo, ziwalo ndi zofewa) ndizozimene zimawasiyanitsa bwino, monga momwe zimakhalira kuti amasandulire zolimba ndi malo omwe ali ndi zinthu zoterezi pokhapokha ndi cholinga chowatsitsimutsa.
Koma tiyeni tiwone momwe angapangire zinthu zamatabwa molunjika ndiyeno pitirizani ku ntchito zina zosintha.

39.1 Masamba kuchokera ku zinthu zosavuta

39.1.1 Mesh imafotokozedwa ndi mbali

Titha kupanga mauna omwe amamangidwa ndi mizere, ma arcs, ma polylines, kapena ma splines, bola afotokoze malo otsekedwa pogawana mathero awo. Ndizomwe timatcha "Mesh defined by sides".
Chisankho cha mesh chimatanthauzidwa ndi mtengo wa mitundu iwiri ya Autocad: Surftab1 ndi Surftab2, yomwe mtengo wake wosasintha ndi 6. Ngati mulemba zosinthazi pawindo la lamulo, mukhoza kuwonjezera kapena kuchepetsa mtengo wawo, womwe udzawonetsedwe mu chiwerengero. za nkhope za ma meshes atsopano (osati omwe afotokozedwa kale). Mwachiwonekere, ndi mtengo wapamwamba wa zosiyanazi, kulondola ndi "kusalala" kwapamwamba kumakhala kwakukulu, koma ngati kumakhala kovuta kwambiri kungakhudze nthawi za kubadwanso kwa zinthu pawindo malinga ndi liwiro ndi kukumbukira kompyuta yanu.
Komabe, mosasamala kanthu za phindu lomwe timapereka kwazosiyana siyana, tidzatha kuona momwe tingawonjezere kufatsa kwa zinthu zimenezi.

39.1.2 Regladas

Manda omwe amalamulidwa ali ofanana ndi omwe adayimilira, koma amafuna zinthu ziwiri zomwe zimakhala mbali. Kotero mphonje yokha ya M imatengedwa ndipo lingaliro lake limaperekedwa ndi mtengo wa Surftab1, mtengo wa kusintha kwina sikukhudza zotsatira.
Zinthu zomwe zimapangidwira pamwambazi zingakhale mizere, mabwalo, arcs, ellipses, polylines ndi splines ndi chikhalidwe chakuti awiri awiri kapena awiri awiri ogwiritsidwa ntchito, osagwiritsidwa ntchito amagwiritsidwa ntchito.
Pogwiritsira ntchito zinthu zotseguka, nkofunika kukumbukira mfundo yomwe chinthucho chikugwiritsidwa ntchito, popeza lamulo likuyang'ana mapeto omwe akuyambirapo. Ndiko kuti, ngati mfundo zotsutsa zikusonyezedwa, pamwamba pake padzakhala mpikisano.

39.1.3 yaikidwa

Mizere yosungidwa imapangidwa kuchokera ku mbiri ndi mzere umene umatumikira ngati chithunzi cha malangizo ndi dera. Mwa kuyankhula kwina, tikhoza kupanga mbiri ya chinthu chilichonse ndi mizere, arcs, polylines kapena splines ndiyeno kupanga extrusion ya mbiriyo. Kukula ndi kutsogolera kwa extrusion kumaperekedwa ndi mzere wina wowongoka womwe umatumikira ngati vector. Monga momwe tawonera kale zowonjezera maulendo angapo, palibe zambiri zoti tiwonjeze pazinthu izi, kupatula zomwe zingatheke kuti tiwonetsetse vutoli mu kanema yotsatira.

39.1.4 Yasintha

Mahesedwe opangidwa ndi mavitamini amapangidwa ndi kusinthasintha maonekedwe pazitsulo, motero kumapanga nkhope ya mesh. Mbiriyo imatchedwa trajectory curve, axis, axis of revolution, yomwe iyenera kukhala mzere kapena gawo loyamba la polyline. Mwachinsinsi, mbiriyo imasinthasintha madigiri a 360, yopanga chinthu cha 3D chatsekedwa, koma tikhoza kusonyeza mbali yoyamba ndi yotsiriza, zomwe siziyenera kukhala 0 ndi 360 madigiri.
Monga mukukumbukira, tanthawuzo lapitalo likugwira ntchito mofananamo ndi zolimba ndi malo omwe amatsitsimutsa, kotero, kachiwiri, zimangotchulidwa ndi mbiri.