[ https://issues.apache.org/jira/browse/SIS-176?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Martin Desruisseaux updated SIS-176: ------------------------------------ Summary: Provide an optimized MathTransform implementation for diagonal matrices (was: Provide an optimized transform for diagonal matrices) > Provide an optimized MathTransform implementation for diagonal matrices > ----------------------------------------------------------------------- > > Key: SIS-176 > URL: https://issues.apache.org/jira/browse/SIS-176 > Project: Spatial Information Systems > Issue Type: Improvement > Components: Referencing > Reporter: Martin Desruisseaux > Priority: Minor > > {{ProjectiveTransform}} handles arbitrary matrices in a generic way. However > in practice, many matrices are diagonal + a translation transform. We may get > some performance improvement if we write a specialized transform class for > such matrices, because it would replace a O(_n_²) operation by a O(_n_) one > (_n_ is the matrix size). -- This message was sent by Atlassian JIRA (v6.2#6252)