NGHIEN CLfU-TRAO D O I NGHIEN ClJtJ PHlTONG PHAP XAY DVTVG HTdl QUAN AO / 3CHIEUDirATRENHrdlBEMATCOTHENGU'Cn INVESTIGATION OF CONSTRUCTION METHOD OF 3D CLOTfflNG MESH BASED ON THE BODY SimFACE MESH Liru Hoing', NgS Chi TVang^ 'Tnicmg Dai hpc Su pham Ky thuat Hmig Yen ^Truong D?i hpc Bach Khoa Ha NOi T6M TAT Bdi bdo ndy trinh bdy ket qud nghien ciru phuang phdp xdy dimg luai be mat quan chieu dua tren luai be mat ca the ngucri Tie cdc diem nhdn trac (diem nut) quan trpng tren ca the nguoi, cdc vector phdp tuyen tren lu&i co the tgi moi diem dupc xdc dinh Dpng thdi, tren casd nghien ctiu gid tri chenh lech tgi cdc diem nhdn trac quan trpng, hg thong cdc diem mcri tuang un dugc xdc dinh Luai be mat qudn dupc tap thdnh tie cdc diem ndy Ddy Id mpt cdch tiep can md vigc xdy dung ludi be mat sdn phdm tie lual be mat ca the phuc vu thiet ke qudn chieu De mo phdng cdc diem nhan trde vd ludi be mgt qudn do, chuang trinh phdn mem mo phdng da dupc xay dung dua tren ngan ngH lgp trinh Grasshppper chgy tren nen tdng chuemg trinh hga 3D; Rhinoceros 5.0 lit Ichda; Luai be mat qudn do, luai ca the, thiit ki qudn chieu ABSTRACT This paper introduces the investigation result of cpnslruction method of 3D clothing mesh based on body surface mesh From the anthropometric points (nodes) on the human body, the norma vectors on the grid body of each point are determined Also based on the research result ofdifereni value at anthropometric important points, the system of new respective points is created The 3D clothing mesh is createdfrom these points This is a new approach of the surface mesh construction fiom the body surface mesh in 3D clothing design To simulate the anthropometric points and surface mesh clothing, the simulation programs have been developed based on the programming language, which runs on the 3D graphic platform Grasshopper; Rhinoceros 5.0 Keywords: Clothes surface mesh, mesh of body, 3D clothing design ISSN 0866-7056 TAP CHl CO KHl V I £ T NAM, s6 10 nam www.coldiivietnam.vn 2016 NGHieNCCrU-TRAODOl l.D,^TVANBE = 5,5; Rpng vai = 31; Dai tay = 41; Cao co thg = 136;Daieo = 44 Trong nhimg nam gan day, da co nhieu cong trinh nghien cihi ung dung mo phong chieu viec tii tao hinh anh ca thi ngucri, nghien ciiu d ^ diem tiep xiic giiia ccr thi ngudi va quin ao, phuc vu thiit kl quin ao chigu - Ao T-shirt, khong c6, mac 6m sat co the, vai det kim (hinh 1) Tren the gioi, cac nha khoa hoc cung da nghien ciiu, ling dvmg cong ngh? mo phong ao quin io khong gian chiSu (3D) DiSu nhy, cho phep kha nang dieu chmh mSu tren ma-no-canh ao mpt each chinh xae hon, phu hpp truoc dua san xult hang loat, dap iing dupc nhu cau cua ngucri tieu dung Trong do, n^i dung xay dvmg luoi bi mat san pham la phSn rat quan trpng, tao nin tdng CO sd cho qud trinh thiSt ki quin ao chieu sau Vi$c nghien ciiu xay dung lucd bS mat quSn &o m6i quan h$ vai bi mat co thi nguoi chua dupc th\rc hien tai Vi?t Nam Day M npi dung chinh dupc trinh bay bai bao ndy Hinh Mdu nghien ciiu 2.2 Phircmg phap nghien cihi Phuong phap quet bg mat ca thg ngucri va quin ao: Th^c hipn trgn mSy quel toan co thg 3D body Scanner o trang thai, khong mic ao va CO mac ao Ket qua thu dupc la tgp mau quet trang thai va bang so nhan trie cua mau quet 2.1 Doi tirgrng nghien ciru Qua trinh chuan bj mau vd qugt miu dupc dure hign theo TCVN 5781: 2009 quy djnh phucmg phdp ca thg nguai vd theo yeu clu cua thigt bi tai Vien Dgt may, Tjp doan Dgt may Viet Nam [2] - Nam va nO nien Vigt Nam dupc chpn d^i dign cho nhom nguoi truong thanh, khoe m ^ , khong dj tat, cp thg can ddi Phucmg phap mo phong chigu: Mo phong he digm tren co thg, hg digm tucmg iing trgn va mo phong luiii bg mat + So chinh mau nam (cm): Vong radng = 97; Vong eo = 82; Vong nguc = 87; Xuoi vai = 5,5; Rpng vai = 38; Dai tay = 51; Cao CO thg = 147; Dai eo sau = 54 Phucmg phap xdc djnh so li^u digm: Cac diem nhan trie tren ca thg vd digm tuong quanfrgndo dupc xae dinh theo tpa dp chigu tren ciing he true B I TlTglNG VA PHlTONG PHAP NGHrtN C«JtI + So chinh mau nii (cm): Vong mong = 89; Vong eo = 69; Vdng ngvc = 83; Xuoi vai ISSN 0866-7056 T A P C H I C K H V I £ T N A M S 10nam2016 www.cokhivietnam.vn NGHIEN CU'U-TRAO D I 2.3 Npi dung nghien cihi 2.3.1 Mdi lien he giira ca thi ngudi va qudn Mau quet 3D cua co the va tuong ling dd duQfc xii ly, di^u chinh vi tri khong gian 3D diing vdi trang thai thirc te theo nhu ket qud nghiSn ciiu cua tai lieu [ ] Tai nhirng diem nhdn trde tren co the ngucri vd cdc diem tuong ling tren dugc xdc dinh cung voi du lieu ve tpa dp diem, dong thdi tinh gia tri khoang cdch giua dilm tuong iing [1] Gia tri tinh dupc chinh la gid tri chenh lech tai diem nhdn trac giiia CO the ngudi va be mat ciia Tap hpp cac diem do, se Id co sd de thiet ke be mat mdi Day la co sd thuc tien quan trpng de xay dung phdt trien mdu mdi thiet ke chieu Diem tuong umg tren cua diem nhdn trac tren ca the chinh la giao diem ciia tia phap tuyen di tir be mat co the den be mat He diem nhan trde co ban cua co the cac chuong trinh doi vdi moi mdu quet co the Id dong nhdt Xay dirng mpt khoi cau co tam tai moi diem CO sd, lay giao tuyen ciia khoi cau pdi ludi CO the Vdi ban kinh khoi cau dii nho nhiing diem tren giao tuy^n chinh la ldn cfn cua diem co sd vd be mat qua cdc diem tren giao tuyen se gdn dung vdi be mat co the quanh diem co sd Xdc dinh hinh chieu diem co sd len be mat Phap tuyen tai diem co sd cd phuong triing vdi dudng noi diem co sd va hinfa chieu tren be mat Bu&c 3: Xdc dinh diem tuang dng trin Ao: - Thuat todn dang thu gpn: * Phdn tich thuat todn: Sau xdc dinh vector phap tuyen t^i diem co sd, xdc dinh tia co g6c tai dilm co sd va cd phuong phdp tuyln [4] Bu&c 1: Nhgp hp diim casa De ddng nhdt he di6m co sd {didm nhdn trac) doi vdi ciing mpt mdu quet He diSm co sd chuemg trinh dugc ldy tir he dilm co sd chuang trinh xdy dung bl mat co thi ngudi [I] Xdc dinh giao diem cdc tia vdi ludi Xdc dinh khoang cdch giira dilm co so vd giao diem ISSN 0S66 - 7056 TAP CHi CO KHf V I £ T NAM, S6 ] nam www.cokhivietnam.vn 2016 NGHIEN Cliu-TRAO DOI a) Xay dirng he di§m He diem ctia la dnh xa ciia he diem tren co the thdng qua phep djch chuyen theo he vector dicfa chuyen He Vector dich chuyen la he vector phdp tuyen vdi be m^t tai mdi diem tuong iing he diem cua [6] Do ldn cua mdi vector dugc xdc dinh thdng qua viec tong fagp tir rad hinh da cd Tap gia tri dp ldn tuong iing vdi moi vector phap tuyen dugc luu trii du lieu D Text cua ngon ngii lap trinh Grasshopper * T h u a t todn va cac lenh: Hinh He diem ca s& tren be mat ca the [IJ 2.3.2 Xay dtrng mo hinh mo phdng chieu be mgt qudn Muc tieu nghien cuu bai bao la xdy d i ^ g ludi cua quan tir ludi be mat co the ngudi dua tren cdc diem nhan trac, ddy Id co sd quan trpng de hoan thi?n phuong phdp thiet ke chieu Trong chuong trinh thiet ke do, ludi be mgt dupc xay dung bang phuang phdp npi suy, thong qua cac gid tri: Ludi be mat co the vd gia tri chenh l?ch tai mdi diem toan bp h? diem co the Ddi vdi chuong trinh dugc thuc hien, he diem tren ca the hay he diem ciia chinh la tap hgp nhiing diem niit cua mofainfa(so lugng diem se nho hon nhieu so vdi so lugng diem quet ban ddu) Trong thugt todn phdt trien ludi do, fa? diem tren dugc phdt trien tir h? diem tren CO the De dam bdo dp chinh xdc theo yeu cdu, nhung diem phu phii hgp dugc xdc dinh them Mat dp diem phu co the dieu khien dugc va cho phep ndng cao dp chinh xdc ciia ludi dugc tao (trong trudng hgp dac bipt, co the khong can he thong diem pfau nay) Trudng hgp tdng qudt Trinh t\r xdy dung ludi do: - Thudt toan thu gpn la: - Xay d\rag he diem ciia do: He diem ciia chinh Id dnh xa he diem ciia co the thong qua phep dich chuyen theo he vector dich chuyen - Xdy dung he dudng do: Npi suy dudng cong NURBS tir he diem - Xdy dung ludi be mat do: Npi suy mat cong NURBS tu h? dudng vd chuyin doi sang cdu tnic be mat dang ludi ISSN 0866 - 7036 TAP CHi CO KHi VIET NAM, Sd 10 nam 2016 www.cokhivietnam.vn NGHltN CU'U-TRAO OOl - Thudt todn dien gidi vdi dilm goc chinh Id diem nut thupc h? diem, cdc dilm phy dugc sinh timg QUAD va CO dja chi (u,v) theo chilu u vd v cua QUAD [5] Thudt todn gid tri tuyen tinh * Phdn tich dir lieu Q Text: Q text la danh sach luu tru, dd cd the khai thac thong tin ve each thiic to cfaiic diem fae diem, nhdm tao cau triic ludi pfaiifagpvdi doi tugng vd muc dicfa nghien ciiu Q text chiia dii lieu dang van bdn co cu pfadp, de su dung thong tm chua, cdn tfaudt todn xir ly va lay gia tri [3] Dii lieu Q text dugc chia tdch cdc phdn, sau loai bd nhung thanfa pfadn lien quan tdi cii phdp vd khong cfaiia tfadng tin can tricfa xudt, nhung pfadn cfaiia tfaong tin se dugc to hgp vd sap xep lai hgp ly Doi vdi moi diem nut vd diem phu h? diem ca the can tfailt co mgt vector dich chuyen tuong iing dh tfaucfaienphep dnh xa, tgo he diem nut vd dilm phu ciia Dp ldn cdc vector dich chuyen tuong img vdi moi diem niit dugc tricfa xudt tu dir li?u D text Ddi vdi cdc diem phu, gid tri dp ldn ciia cac vector dicfa cfauyen hrong img dugc sinh tir thudt todn npi suy gid tri hiyin tinh B I mat co tfal hay bl mat dlu dupc chia tfadnh cdc QUAD Tap dugc be mat tir diem gdc, lay cdc gia tri diem tren mat vdi phep chia diem be mat Sdivide, mat dp theo chieu u,v cd the bien d6i Anh xa cdc diem chia len be mgt ludi nhd ifnfa Mesfa closest [3] ta dugcfaediem QUAD vdi dia chi mdi diem phu xdc djnfa Phdp tuyen cua he diem QUAD: Thudt todn thu gQn: ISSN 0866 - 7056 TAP CHf CO KHi VIET NAM, S6 10 nam 2016 www.cokhivietnam.vn NGHltN CU'U-TRAO OOl Sau dd, tren co sd phdn tich chieu ciia dudng bao cua QUAD se thay ddi de he dudng bao cua QUAD co chieu cfauan b) Xay dymg h? dudng ao * Xdy difng hi duang cong Tli du li$u he diem vd C text Ndi cdc diem tgo thdnh h$ dudng cong cua B p i ^ ^ * s a ^ ^ •1^5? EJH|^7 "\ : Ludi bl mat QUAD dugc tao td dudng bao, sau ket noi tit cd QUAD lai va chuySn ddi du lieu sang dang Mesh * Tgo lu&i tho ^^^^^ * Phdn chia hi duang cong thdnh cdc hp du&ng QUAD Tir h? dudng cong va dii li?u Q text Ti; dpng chpn dudng khd thi tao QUAD, sau t\r dgng chia nhd dudng dd, tao thdnh ^ dudng bap ciia QUAD Phdn logi cdc dilm h$ di6m tgo thdnh logi diem tuong ling vdi vj tri gdc cda QUAD Ddi vdiraoidiem gdc cua QUAD, thuat todn se t^ dpng tim cdc dudng he dudng cong di qua nd, dd chinh Id cac dudng khd thi dl_ tgo dudng bao cua QUAD Tuong umg m6i diem gdc se tim dupc it nhdt dudng di qua nd; nhu vdy, ydi moi QUAD cd diem gdc se tim dugc nhieu nhdt dudng cong (do mdi dudng dugc xdc dinh d^c ldp nen c6 trudng hgp dudng cong dugc chpn lan), sau lpc bo triing lap se cd ducmg cong dugc sdp x8p theo thii tu chilu kim ddng ho KET QUA VA BAN L U ^ 3.1 M6i liSn h | gi&a co the nguM vd quiin Co the vd qudn cd mdi lienfa?mgt tfaiet vdi nhau, thdng qua gid tri khodng; cdch giiia cdc diem nhdn trac tr@n co thS vd quan Tren hinh 4, the hipn diem (mdu do) Id diSm tren co the, diem (mau xanh) la dilm se tgo ludi quan Cdc gid tri da cho thdy su rang bupc, lien quan mat thiet giua co the vd qudn Tai nhirng diSm nho cua co tfal, quan cd xu hudng bam sat be mat co tfal, nen gid tri khoang cdch nho vd ngugc Igi Vi d\i nhu diem diu nguc, hom nguc 14,15 vd diem 16 [1] - ^ I HCdotnlhtns Hinh Lieu gidi thupt tinh todn dp chenh Ipch ' ISSN 0866 - 7056 TAPCHiCOKHf Vl|TNAM,Sd 10nam20l6 www.cokhivietnam.vn NGHieNCCU-TRAOBdl Chuong trmh xdc dinh gid ttri chgnh lech t?i cdc digm nhan trie (digm niit) dupc xay dung tu dpng tinh todn gid tri khoang cdch tit digmttgnluoi co thg dgn digm trgn dpc theo chigu vector phdp tayen 3.2 Mfi hinh m6 phong lu*i vA bl m|t quin Chuong hinh xdy dung ludi quan dugc thuc hi#n, nhu sau: Ludi DText CO tfal H§ Vector Hinh Md td mdi lien quan giUa he diem tren ea the vd hg diem tgo ludi Hf diem Ao Bdng Tgp hgp gid tri chenh Igch tgi mgt sd diem Siea thi chi sd nhdn trde chinh tren ca the ngudi vd dilm GU GU Gii Gii Di^m Diim Di£m tr| tr| (mm) (mm) (mm) (mm) D57 8.67 DI9 8.16 D38 6.18 DO 2.94 D58 3.53 D39 7.33 Dl 8.04 D20 2.41 1.32 S.S4 D59 D2 8.81 D21 1.95 040 D3 8.14 D22 2.27 D41 I6.SI D60 2.37 D6t 1.65 D4 0.78 023 12.8S D42 8.43 D24 4.64 D62 0.71 D5 5.71 D43 6.18 D44 D6 7.63 D25 6.29 3.99 t>63 1.38 D7 6.99 D26 8.81 D4S 25.99 D64 0.60 D8 0J4 D27 9.22 D46 14.70 D6S 12.48 D9 3.61 D28 52 D47 12.95 D66 4.89 DIO 0.70 D29 071 9.96 D67 048 6.47 DII 46 D30 2.65 D49 24.50 D68 8.80 DI2 3.70 D31 105 D50 15.21 D69 2.64 D32 3.69 DI3 9.97 D5I 11.46 D70 7.49 014 22.86 D33 2.58 D52 5.02 D71 1.81 D15 14.77 D34 0.44 D53 14.01 D72 8.61 DI6 2.89 D35 5,56 D54 5.11 D73 3.08 DI7 7J5 D36 7.69 D55 12.58 D74 5.27 D18 2.03 D37 8.82 D56 3.99 Oiim Hien thi gid tri chgnh ^ Ket thnc Hinh Luu thugt todn xdy dung hp diem (a) (b) Hinh Hp diim khong gian dugc gdn chi s6 vd mdu sdc tnfc quan: a)Mdu nam; b) Mdu nir ISSN 0866 - 7056 TAP CHf CO KHf VIET NAM, Sd 10 nam 2016 www.cokhivtetnam.vn NGHIEN CLfU - TRAO e l (a) (b) Hinh He diem vd gid tri dp l&n vector dich chuyen tuang img tai timg diem: a) Mdu nam: b) Mdu nii Hinh Luu dd thudt todn xdy dung hp du&ng K E T LUAN Bdi bdo da trinh bay npi dung xdy dyng ludi be mat quan tfaiet ke qudn chilu Ddy la nghien ciiu mang tinfa tien pfaong tgi Viet Nam ITnfa vuc ndy Vdi dtr lieu tir quet mau ca tfal ngudi d trang thdi (mac va kfadng mac do) du lieu tfau thdp dugc da chi kfaoang each chenfa Ipch giua cdc diem nhdn trac tren co the va be mat ciia Ddy la co sd de xay dung ludi quan mdi Tren co sd nen tdng Rfaino, cfauong trinh dugc viet tren ngon ngir Grasshopper cho phep xdy dung he diem do, he dudng do, tir do, tien hanfa xay dung ludi QUAD cua theo timg miic dp: Ludi tho va ludi mjn Hinh S Ltrai m&i dugc xdy dung: al Mdu nam: b) Man nir Ludi be mat cua dugc tgo dua tren ludi be mat co the vd dua vao gid tri chenfa lech ciia cac diem nfaan trac (diem mit) tren co the va tren Id nghien ciiu cd dp tin cdy cao, dugc '^ ISSN 0866-7056 TAP CHi CO KHf VIET NAM, S6 10 nam 2016 www.cokhivietnam.vn NGHieNCCfU-TRAOOOl thuc nghiem tren san phdm thuc te di§u kien Viet Nam Day se la dir lieu quan trpng, ldm CO sd phuc vu thigt ke qudn khdng gian chieu Ngon ngu lap trinh Grasshopper vdi kha nang linh hoat, tinfa iing dung cao td khd hiiu faieu viSc md phdng he diem, md phdng qua trinh tgo ludi quan chieu • Ngdy nfagn bdi: 20/8/2016 Ngdy pfadn Men; 14/9/2016 Tdi Ui^u tham khao: [I] Luu Hoang, Ngo Chi Trung; Xdy dung lu&i be mpt ca the ngu&i phpc vp thiet ke qudn chieu, Tgp chi Khoa hgc va Cong nghe, Tnrdng Dgi hpc Su pham Ky tfaudt Hung Yen, s6 11, thang 9/2016 [2], T ^ h?u hudng dan sir dung mdy qu6t [TC]2 NX-16, Vi$n D?t may Tap doan D?t may VietNam, 2010 [3] Andrew Payne, "The Grasshopper Primer Third Edition Gitbook" < https://www gitb ook com/book/m o de ab/grasshopperprimer> [4] Ybng-Jin Liua,*, Dong-Liang Zhangb, Matthew Ming-Fai Yuenc, A survey on CAD methods in 3D garment design Computer in Industry 61 (2010) 576-593 [5] Z Yasseen, A Nasri, W Boukaram, P Voline, N.Magnenat-Tlialmaim, Sketch-Based Garment Design with Quad Meshes, Author manuscript, published in "Computer-Aided Design (2013) Pages 562-567, ISSN 00104485" 16] Yuwei Meng, P.Y.Mok, Xiaogang Jin, "Computer aided clothing patter design with 3D editing and pattern alteration ", Computer -Aided Design 44 (2012) 721-734 ISSN 0866 - 7056 TAP CHf C O KHf V I £ T NAM, Sd 10 nam www.cokhivietnam.vn 2016 ... DI2 3. 70 D31 105 D50 15.21 D69 2.64 D32 3. 69 DI3 9.97 D5I 11.46 D70 7.49 014 22.86 D 33 2.58 D52 5.02 D71 1.81 D15 14.77 D34 0.44 D 53 14.01 D72 8.61 DI6 2.89 D35 5,56 D54 5.11 D 73 3.08 DI7 7J5 D36... 8.16 D38 6.18 DO 2.94 D58 3. 53 D39 7 .33 Dl 8.04 D20 2.41 1 .32 S.S4 D59 D2 8.81 D21 1.95 040 D3 8.14 D22 2.27 D41 I6.SI D60 2 .37 D6t 1.65 D4 0.78 0 23 12.8S D42 8. 43 D24 4.64 D62 0.71 D5 5.71 D 43 6.18... D44 D6 7. 63 D25 6.29 3. 99 t> 63 1 .38 D7 6.99 D26 8.81 D4S 25.99 D64 0.60 D8 0J4 D27 9.22 D46 14.70 D6S 12.48 D9 3. 61 D28 52 D47 12.95 D66 4.89 DIO 0.70 D29 071 9.96 D67 048 6.47 DII 46 D30 2.65