9. Ua ntej lossis postmultiplication ntawm a matrix A los ntawm scalar matrix multiplies tag nrho cov nkag ntawm A los ntawm qhov kev nkag mus tas li hauv scalar matrix. Nws yog sib npaug rau scalar multiplication ntawm matrix, los ntawm qhov scalar tshwm rau ntawm kab pheeb ces kaum.
Dab tsi yog Premult thiab Unpremult hauv nuke?
Los ntawm Pluralsight rau lub Kaum Ib Hlis 30, 2014
Premult thiab Unpremult hauv NUKE yog nodes uas tej zaum yuav saib tsis tau. Qhov no yog vim qhov teebmeem ntawm kev siv los yog tsis siv lawv yuav zoo li tsis pom tseeb dhau mus txog thaum koj tau los ze lossis hloov pauv loj heev.
Dab tsi yog Premult hauv nuke?
Lub ntsiab lus yooj yim ntawm premult yog txhawm rau muab cov alpha thiab RGB ntawm cov lus nkag ua keYog li ntawd yog tias koj muab txhua yam los ntawm 0, koj yuav tau txais tus nqi ntawm 0 thiab thaj chaw ntawd yuav nyob twj ywm dub. … Tab sis yog tias koj muab nws los ntawm 1, thaj chaw yuav khaws qhov qub RGB txij li ib tus lej uas tau muab los ntawm 1 nyob twj ywm tib yam.
txhais li cas los ntawm kev sib faib?
Yog li ntawd, nws yog ib qho uas siv cov lus "pre-multiplication" thiab "post-multiplication." Thaum peb hais tias "A yog tom qab sib npaug ntawm B," lossis "B yog ua ntej muab los ntawm A," peb hais txog khoom AB. Thaum peb hais tias "B yog tom qab sib npaug ntawm A," lossis "A yog ua ntej los ntawm B," peb hais txog cov khoom BA.
Koj puas muab 3x3 matrix los ntawm 3x2?
Multiplication of 3x3 and 3x2 matrices is possible and the result matrix is a 3x2 matrix. Lub laij lej no tuaj yeem muab faib ua ob lub matrices tam sim ntawd thiab qhia txog kev daws teeb meem ib ntus.
