Is there any other kind of nonuniform scaling?
Yes
Since the symmetric matrix can break down into R^TDR then yes
Though symmetric matrices can be broken down to R^TDR, are there any constraints on the matrix R? For instance, R has to be a rotation matrix.
yes
yes!
Is there any other kind of nonuniform scaling?
Yes
Since the symmetric matrix can break down into R^TDR then yes
Though symmetric matrices can be broken down to R^TDR, are there any constraints on the matrix R? For instance, R has to be a rotation matrix.
yes
Yes
yes!
Yes