Mu ltip rocessor Iso-surface Volume Reudering

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It to be com puted t he ready b uffer is d l(~ked to S("(' if t.he computations Me really necessary, if tl u' ray .y teruuua.....1 t he compntat.lo nn Me s kippe... l. T his spt-"t-'tl!'l u p the re ud N illK process by a l a r~p amount. . re ndermg is by its very na t ure very d ata int e nsive. For this reason t he ISVR ,\lgoril hlll uses a binary hiuru-y shell is also chec ked t o avoi d unneoeearv computations . \Vhell t he lso s ur face is rt...-on.st.ruct e d a ll u- is used to find "he exact locnt.iou of t he s u rface. If based on t lu- val ues ill II... dataset we call d ('INlIlinc is 110 lso s u rface between eight neighboring voxels, we can s kip t.hnt part icula r s pre-e. These sma ll space; ght neighboring voxr-ls will be called a cdl for the res t of this p ajlN. Cenerutiug 1,1](' binary s hel l r-an he fast compared to the res t of t he co m putations and therefore using the hln ar v shel l is w ry efficient. Another o f the biunry shell is t ha i, it only needs to he generated when t he iso va lue is changed. T his allo ws t he 10 skip runny cells whose vox c-ls will 110 IOIlF;!'T be Fetched. This reduces t.hr- amoun t of' dnl.n t.hnt mu st I", un t,ll!' mai n nu-mcry, which ltb~(J I:II)f'f'(i s up t IL!' renderi ng process. a. .I\ I U LT I PROC E SSOR R E N D EllIN G ndering w it h muh.iple processors on a genera l purpose comp ut er if; not only It mati or o f makin g t Il!' .~ I) f1 wa re rltiple processors sirnultuneuuslv. The proper t ies of I)lt' hardwa re should he t akr-u into alTOUII!. , L('P wlu-u tn Ill' d OIIP , ..... hir-h a ll o ws tho ('o m pul t>r to be us, ... ) fo r other t usks. laq!,.· :\IlIOUII\'S of data need to IIf' sinn ed . sltarf't! IIwlnory segl ll'· nl..rs in e1\(,I. clust er Clu ster k times -e - > : , __--=:C,liu"tcr socket --. D process :nderJo h o shared memory seg ment , n times I , n titiles Data 1 V Data nderJ(lh Manager : 17 Re nd e rJo h ,, I Manager oady Data :, ,: : Ready : [ Data , ullc r , Segment I , Buffer : Se gment , ,, I ' , , , < ~ ~ ~ ~~ ~~: I~~~ ~ ~~ ~ ~ ~~~~~~~~- -------- - ~ I Se h~dl~le r I Image Buffer Fig ure 4 . The software arr-hit-x-t.ure.
) i s t ri h llt i ll ~ t111 ~ wnd doad In ' 1\\ .. !O;"i,· I\'d,' " ," .lb lrlhlllt' l be rendering wur klo ..ttl 011 s..vern! proces sor s . II carl he do ue "ll lwf i pan' .If 1Ill' tllIl 1.1I1 sl "" '\ when- 111 1;' inp u t s pa.,\, i.e. Ilit' voxel datasel alld lhe o utput s pace is t.he im a ,\!;J'. l' Ii"" t l", l l (, :\(" \,(>.1 I Ill' uumher " f pro...-.,;t-;o r:l ill t1 l t ~ 1> .\' ~ 1. f'l 1I . T Ilt' .uuo.uu . " f ('Ill " ,:,> :ivai b l,!" 1., 1' n 'Il
Page 1 and 2: M u ltip rocesso r Iso-surfa ce Vol
Page 3 and 4: 2. C HO OS IN G T ilE IIA llOW A H
Page 5: il fa mily of lI it af h i. unfort
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Mu ltip rocessor Iso-surface Volume Reudering

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