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<TITLE>Re: [vtk-developers] vtkMath::Dot2D</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>My guess would be that that is a copy-paste error. Change it to 2-vectors is probably the right thing to do.<BR>
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AFAIK, the array declaration in a function/method argument is treated just like a pointer. C++ does not do any range checking. I think it just serves to help document what size array you expect.<BR>
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-Ken<BR>
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On 12/9/09 3:57 PM, "David Doria" <<a href="daviddoria+vtk@gmail.com">daviddoria+vtk@gmail.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Is there any reason:<BR>
<BR>
// Description:<BR>
// Dot product of two 2-vectors. The third (z) component is<BR>
// ignored (double-precision version).<BR>
static double Dot2D(const double x[3], const double y[3]) {<BR>
return ( x[0] * y[0] + x[1] * y[1] );};<BR>
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needs to accept 3-vectors and talk about how it ignores the last<BR>
component? Couldn't it just be:<BR>
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// Description:<BR>
// Dot product of two 2-vectors. (double-precision version).<BR>
static double Dot2D(const double x[2], const double y[2]) {<BR>
return ( x[0] * y[0] + x[1] * y[1] );};<BR>
<BR>
Thanks,<BR>
<BR>
David<BR>
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</SPAN></FONT></BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
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**** Kenneth Moreland<BR>
*** Sandia National Laboratories<BR>
*********** <BR>
*** *** *** email: <a href="kmorel@sandia.gov">kmorel@sandia.gov</a><BR>
** *** ** phone: (505) 844-8919<BR>
*** web: <a href="http://www.cs.unm.edu/~kmorel">http://www.cs.unm.edu/~kmorel</a><BR>
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