I would say geodesic. But i'm not sure anyway.

Will
PS: i shouldn't miss any more differential geometry class.

"Warp" <war### [at] tagpovrayorg> escreveu na mensagem
news:3bf790f8@news.povray.org...
> Jan Walzer <jan### [at] lzernet> wrote:
> : you mean photons won't always fly straight, but be affected by
> : the mass of objects ?
>
>   In fact, photons do always "fly" straight.
>   Of course the meaning of "straight" is actually "the shortest path
between
> two points in space". In a cartesian coordinate system this is what we
usually
> think as "a straight line". However, according to the theory, space is not
> a cartesian coordinate system, but it's bent due to masses in it. In this
kind
> of curved space the real shortest path between two points may not look
> straight from the point of view of a distant observer. However, from the
> point of view of the photon, it always travels straight (ie. the photon
> itself always goes ahead, without never turning to any other direction).
>   I think that the shortest path between two points in a curved space is
> called a geodetic line, or something like that.
>
> --
> #macro N(D,I)#if(I<6)cylinder{M()#local D[I]=div(D[I],104);M().5,2pigment{
> rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro M()<mod(D[I],13)-6,mod(div(D[I
> ],13),8)-3,10>#end blob{N(array[6]{11117333955,
> 7382340,3358,3900569407,970,4254934330},0)}//                     - Warp -

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