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From "Gilles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GEOMETRY-14) AffineTransform?D Classes
Date Sat, 06 Oct 2018 23:17:00 GMT

    [ https://issues.apache.org/jira/browse/GEOMETRY-14?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16640904#comment-16640904
] 

Gilles commented on GEOMETRY-14:
--------------------------------

{quote}A.transform(B).transform(C) would logically perform A, then B, then C.
{quote}
With [UnaryOperator|https://docs.oracle.com/javase/8/docs/api/java/util/function/UnaryOperator.html],
this would be expressed either as
{code:java}
A.andThen(B).andThen(C)
{code}
or as
{code:java}
C.compose(B).compose(A)
{code}
Using it will bring all the advantages of a standard API.
{quote}{{t.apply(p1.vectorTo(p2)).normalize()}} is more difficult to read.
{quote}
Maybe, but caution still applies for anything that goes into the public API. The fluent API
is nice but we should explore the alternatives.
{quote}I do not have the private fields set as final so that I can do things like copying
{quote}
This is a can of worms, as it will prevent any simple implementation of multi-threaded processing.

> AffineTransform?D Classes
> -------------------------
>
>                 Key: GEOMETRY-14
>                 URL: https://issues.apache.org/jira/browse/GEOMETRY-14
>             Project: Apache Commons Geometry
>          Issue Type: New Feature
>            Reporter: Matt Juntunen
>            Priority: Major
>              Labels: pull-request-available
>
> We should create AffineTransform?D classes that implement matrix-based affine transforms.
They should have simple methods for creating translations, rotations, and scaling and calculating
the inverse.
>  
> Pull Request #1: https://github.com/apache/commons-geometry/pull/14



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