Adam Turcotte writes: > In addition, I will need to expand the OpAffine struct to include an > additional GeglMatrix3 (call it matrix_inverse or inverse_jacobian?) > to store this data. GeglMatrix3? Is this a 3x3 matrix type? (Ignore the following if it is not.) Maybe the matrix created by the create_matrix () method is not really the "plain Jacobian matrix" even for affine transformations. I understand that there are convenient representations of common image transforms in terms of 3x3 matrices, but I wonder if using a 3x3 to store either the Jacobian or its inverse just confuses things, at least for our purposes. My suggestion: If create_matrix () returns a 3x3, keep the inverse Jabocian computation out of create_matrix (). Because I am far from certain that there would ever be a need to do matrix operations on the inverse Jacobian, I actually am not even sure that it is necessary to store it in an explicit matrix type. For documentation sake? Can anyone foresee a use for the inverse Jacobian matrix being stored in a 3x3? Nicolas Robidoux _______________________________________________ Gegl-developer mailing list Gegl-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gegl-developer
