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https://issues.apache.org/jira/browse/GEOMETRY-41?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16763202#comment-16763202
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Matt Juntunen commented on GEOMETRY-41:
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{quote}At least we'd have the "it's shorter" advantage.
{quote}
Ok. I'll make that update on this PR unless you have any objections.
{quote}Do you have a "real-world" example that requires
{{DoublePrecisionContext}}?
{quote}
The idea of a "tolerance" was present in the original commons-math code and
this is just an extension of it. I've used tolerances/epsilons set to different
values when working with models that either have a very small range of vertex
locations or very large. For example, the Utah teapot model I have worked with
before has closely packed coordinate values all less than 1, whereas the models
I use at work generally have large facets with coordinates up into the thousand
range. I use larger tolerances for the larger models so that the calculations
don't get bogged down with tiny facet subdivisions that don't make any
difference in the overall geometry. I use smaller tolerances for the smaller
models since the tiny facets are actually important in those cases.
I'm picturing {{DoublePrecisionContext}} as just a first stab at getting this
right. I think the API will change as we explore this more. I don't really have
a solid picture of what's required here from a mathematical perspective, just a
practical perspective.
> Vector Precision Equals
> -----------------------
>
> Key: GEOMETRY-41
> URL: https://issues.apache.org/jira/browse/GEOMETRY-41
> Project: Apache Commons Geometry
> Issue Type: New Feature
> Reporter: Matt Juntunen
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The {{Vector?D}} classes should expose {{equals}} method overloads that allow
> a precision object from GEOMETRY-11 to be passed in to determine equality. I
> propose adding the following two methods:
> 1. {{boolean equals(Vector?D vec, DoublePrecisionContext precision)}}
> 2. {{boolean isZero(DoublePrecisionContext precision)}}
>
> Pull request: https://github.com/apache/commons-geometry/pull/24
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