6.2 Splines
Kumbali inayo, ma splines ndi mitundu ya ma curve ofewa omwe amapangidwa molingana ndi njira yomwe amasankhidwa kutanthauzira mfundo zomwe zikuwonetsedwa pazenera.
Ku Autocad, mzere umatanthauzidwa ngati "yunifolomu yopanda yunifolomu ya Bezier-spline" (NURBS), zomwe zikutanthauza kuti malirewo samapangidwa ndi ma arcs kapena elliptical arcs. Ndijika lopindika lomwe, limatithandizanso kupanga zigawo zopangidwa ndi ma curve omwe amathawa miyala yophweka ya zinthu zosavuta. Monga momwe wowerengera adaganizira kale, mitundu ingapo yamagalimoto, mwachitsanzo, komanso zamakono ambiri zamagetsi, zimafuna kujambulidwa kwamtundu uwu. Pali njira ziwiri zopangira mzere: ndi mizere yoyambira kapena ma vertices oyang'anira.
Mizere yokhala ndi mfundo zoikika imadutsa pamitu yomwe ikuwonetsedwa pazenera. Komabe, njira ya "Knots" imakupatsani mwayi wosankha njira zingapo zamasamu kuti muthe kuzungulira mzere, zomwe zimatha kupanga ma curve osiyana pang'ono pamalingaliro omwewo.
Kenako, njira ya "toLerance" yamalamulo imatsimikiza momwe mbali yokhotakhota idzasinthira ndi zolemba. Mtengo wosintha wofanana ndi zero upangitsa kuti phazi lithe kudutsa chabe pamalingaliro awa, phindu lina lililonse kupatula "lidzasuntha" liwiro pamapeto. Tiyeni tiwone kapangidwe ka seweru ndi mfundo zoyikika koma ndi kulolerana kosiyanasiyana.
Muyenera kuti mwazindikira kale kuti kumayambiriro kwa lamulo tili ndi njira ya "Njira", yomwe imatiloleza kusinthira ku njira yachiwiri yopanga ma splines, ndiko kuti, kugwiritsa ntchito ma vertices oyang'anira, ngakhale mutakhala tokha titha kusankha njirayi mwachindunji kuchokera kubatani lake Ribbon
Mizere yopangidwa ndi ma vertices olamulira imapangidwa kudzera mu mfundo zomwe, palimodzi, zimatulutsa mizere yanyumba ya polygon yomwe ingadziwe mawonekedwe a mzere. Ubwino wa njirayi ndikuwonetsetsa kuti ma vertices awa amawongolera kusintha kwa kusintha kwa mizere, ngakhale, kusintha, ndikotheka kusintha mzere kuchokera kumadongosolo kuti muwongolere ma vertices ndi mosemphanitsa.
Ngakhale kusindikiza kwa maulalo ndi mutu wa chaputala cha 18, titha kuyembekezera kuti posankha mzere, titha kugwiritsa ntchito mawonekedwe ake osakanikirana kuti tisinthe chiwonetsero chake kapena mawonekedwe ake. Titha kuwonjezera chimodzi kapena china, kusintha kapena kuzimitsa.
