Re:Matrix Multiplication
by nilkn on Saturday November 26, 2016 @05:11PM
(#13046194)
That demonstrates multiplication of a matrix with a vector which is being rotated, but multiplication of two matrices corresponds to composition of the corresponding operators.
This is actually pretty instructive. For instance, rotations in three-dimensional space do not commute in general; hence neither does matrix multiplication.
Re:Matrix Multiplication
by Sharlin on Sunday November 27, 2016 @08:10AM
(#13048950)
Technically matrix-vector multiplication is just a special case of matrix-matrix-multiplication, but I take your point. Indeed it would be illuminating to see how exactly matrix multiplication composes two transformations.
This is actually pretty instructive. For instance, rotations in three-dimensional space do not commute in general; hence neither does matrix multiplication.