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    <p><strong>CAVEAT:</strong> I don't have a compiler in front of me right now, and I'm suddenly unsure about the SFINAE part (not sure whether it applies to the function body, or only to the parameter types). Somebody please correct this if it's wrong.</p> <p>In C++, you could take advantage of the similar syntax of the different classes to create a single function template:</p> <pre><code>template &lt;class ToType, class FromType&gt; ToType ConvertPoint(const FromType&amp; FromValue) { ToType ToValue; ToValue[0] = FromValue[0]; ToValue[1] = FromValue[1]; ToValue[2] = FromValue[2]; return ToValue; } // If the version above failed, the compiler will try this one. // This is called SFINAE template &lt;class ToType, class FromType&gt; ToType ConvertPoint(const FromType&amp; FromValue) { ToType ToValue; ToValue[0] = FromValue.Get(0); ToValue[1] = FromValue.Get(1); ToValue[2] = FromValue.Get(2); return ToValue; } // Usage: KdTree::HyperPoint hyperPoint; FixedPointType fixedPoint = ConvertPoint&lt;FixedPointType&gt;(hyperPoint); </code></pre> <p>I guess you can do the same in C#, although I'm less familiar with the syntax.</p> <p>For the cases where your classes don't exactly follow the same syntax convention, SFINAE helps you by letting you provide several variants - if one fails, the compiler will pick the next one and try with that. Using <a href="http://en.wikipedia.org/wiki/Shim_%28computing%29" rel="nofollow noreferrer">shims</a>, you can limit the number of variants by providing one generic function that uses appropriately defined shims to both set and get each coordinates for all existing classes.</p>
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    1. POHow to handle type redundancy in external libraries?
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    1. USCarl Seleborg
    1. USCarl Seleborg
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    1. COthanks for the shim link, I hadn't heard that term before. I think that's a step in the right direction. I'd rather shy away from the templated function, since the interfaces to these classes aren't necessarily standard (for example I can't assume the [] operator is defined). Some of these terms led me around to this though: http://en.wikipedia.org/wiki/Adapter_pattern I suppose I could apply that pattern here.
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    2. COwow, SFINAE seems pretty powerful. Is that a standard C++ feature? If it's handled the same by gcc and microsoft, then that could be the best way to handle this.
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    3. COvisual studio didn't like it: Error 1 error C2995: 'ToType ConvertPoint(const FromType &)' : function template has already been defined The [wikipedia](http://en.wikipedia.org/wiki/Substitution_failure_is_not_an_error) example only shows this working with parameters.
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