In terms of linear algebra, is this is simply the projection of an n dimensional vector from an n dimensional space to another n dimensional space?
@intelligentDungBeetle A linear map need not be a projection, nor must it preserve dimension (i.e., go from n dimensions to n dimensions). For instance, a rotation is a linear transformation but not a projection; the sum of n coordinates is a linear map from R^n to R^1.
Are there any other forms of linear transformation used in graphics besides rotation, translation and scaling?
@tpan Shearing. (And translation isn’t linear!)