[x3d-public] Using c# with graphics

[Konstantin Smirnov]

Thanks a lot!  And must we deal with each number accuracy, or this does the
framework? Middle computations
Also approximate

For example, making 11 sums


вт, 21 сент. 2021 г., 13:39 vmarchetti at kshell.com <vmarchetti at kshell.com>:

> This reference:
> https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/builtin-types/floating-point-numeric-types
> details that in the Microsoft .NET C# environment, the numeric double type
> is an 8-byte representation, and offers about 16 digits of precision.
>
> In my experience, in those specific cases where numeric precision needs to
> be carefully dealt with, the solution is not to round the results of a
> calculation; rather the solution is to look at where two double values are
> being compared for equality, and replacing the comparison
>
> if ( a==b) { .... }
>
> with
> if ( abs(a-b) < tolerance ) { ... }
>
> and choosing a value of tolerance is can be something like
>
> double tolerance = 1.0e-15 * Math.Max( abs(a), abs(b))
>
> Vince Marchetti
>
>
> On Sep 21, 2021, at 1:04 AM, Konstantin Smirnov <
> konstantin.e.smirnov at gmail.com> wrote:
>
> Hi
> When adding double numbers in .cs script, must we think about every digit
> accuracy, or it's approximate numbers, so we can treat them as approximate
> with e-7, or so? 15?
>
> Can we do calc and round afterwards?
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