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128 ^1 3S T16lo15 dAt E.JB Lf. Boundary Representation (B-rep) "JAl ,t|$zlz| € tlg +C 6Ir gl = zJ f; (vertex), E(face), _E^-l 4 (edge)z| g nl aJ + Al = zlxlizl ql r++ Ee6I= *B "lH :t- +414 e Cd + E _ E-^J4 :2o)r}. B-rep9 tldg r+g+ ,JE}. O csc EJHsE "JEz) "l 4+ E,I= E'JsI^l? ql ,J461+.(Hl 6J7l Eiil, zl EiI e,l € E-'J) @ olEg zl^j,\l{ol 4Al i.qqq,3EE, F^lE, dzl]E, -g'E4 altol *"latu}. @ r.llolrl el tra r+ol f +l r*ol r}*g r 9l+. Edg +T+ ,JL}. o Ege-l q+g z]lralE_tr_ y*e qls4 7l -+-,q6I+. @ 4EBg ^I+612l '4l$ql +* altol r+6I+. EeAeB _ @ ral 3-49 B-repoll el-Ll gal = EtrJel oil Iq -d E ^ -ilI l. cAD/cAMql^.1 ^I+E}= 4zlzl =I-EZI= =qrl. 2. +4-sZlql^i elzlEol l0olr zJEzl 30'E d =Itr= zl;l=I-szls Eadlq+. 3. E€ I _ s^l HJB ql^-l ,ll z1] H+rlB + uJ ullzfl E+rlB e-l +a E € E 6Iq 4. 4. fl++de-l ++= €E6Iq4. s. tstlzlq +dE +Ag €E6Iq4 6. 3zlg -E'J(e+"lq gill"J : wire frame, ^l rl^ : Surface, +q E : Solid)el =a g € E dlq ?+. 7. +4s se=dE c-repg B-repBBgl q6iq €E6IqE+