Figure 6.19. An element after it has been rotated and then skewed
Eachofthesetransformshasadifferentcurrenttransformmatrixcreatedbythe
orderofitstransformfunctions.Tofullyunderstandwhythisis,we’llneedtolearn
alittlebitofmatrixmultiplication.Thiswillalsohelpusunderstandthematrix
andmatrix3dfunctions.
Matrix Multiplication and the Matrix Functions
Amatrixisanarrayofnumbersorexpressionsarrangedinarectangleofrowsand
columns.Alltransformscanbeexpressedusinga 4 × 4 matrixasseeninFigure6.20.
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