[vtk-developers] vtkMath::Dot2D

[Dean Inglis]

another  signature might be

static double Dot2D(const double* x, const double* y)

that way you could pass x[2] or x[3] or x[ n >= 2 ]
for example

Dean


----- Original Message ----- 
From: "David Doria" <daviddoria+vtk at gmail.com>
To: "VTK Developers" <vtk-developers at vtk.org>
Sent: Wednesday, December 09, 2009 5:57 PM
Subject: [vtk-developers] vtkMath::Dot2D


> Is there any reason:
>
>  // Description:
>  // Dot product of two 2-vectors. The third (z) component is
>  // ignored (double-precision version).
>  static double Dot2D(const double x[3], const double y[3]) {
>    return ( x[0] * y[0] + x[1] * y[1] );};
>
> needs to accept 3-vectors and talk about how it ignores the last
> component? Couldn't it just be:
>
>  // Description:
>  // Dot product of two 2-vectors. (double-precision version).
>  static double Dot2D(const double x[2], const double y[2]) {
>    return ( x[0] * y[0] + x[1] * y[1] );};
>
> Thanks,
>
> David
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