Hi All!

All those particelsystems let me try to build my own. Therefore I need to
write vectors to a file...
Well and now, my problem: I write a bunch of vectors to a file. Later I try
to read them in again. But now I get some floats between the vectors. The
file just consists of vectors, though.
Well, I searched the problem with #debug, but I don't know wether to use vstr
or str. I have to distinguish between vectors and floats. Is there a way? I
allways get errors like

Parse Error: Attempted to redefine float identifier as vector identifier.

Or things like this. :-(

Thanks!

cukk

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> Well, I searched the problem with #debug, but I don't know wether to use
vstr
> or str.

It is very simple and I hope the manual explains it:  Use vstr to turn
vectors and str to turn floats into strings.

    Thorsten

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On Fri, 15 Mar 2002 10:07:43 +0100, Thorsten Froehlich wrote:
>> Well, I searched the problem with #debug, but I don't know wether to use
> vstr
>> or str.
> 
> It is very simple and I hope the manual explains it:  Use vstr to turn
> vectors and str to turn floats into strings.

That's not the question.  He has an identifier that he's just #read from
a file, but doesn't know if it's a float or a vector.

The following isn't tested, but should work.  Just replace the two #debug
statements with whatever sort of output you're seeking.

#macro ScalarOrVector( A )

  #local C = rgbft 0 + A;
  #local D = A+1;
  #local E = rgbft 0 + D;

  #if ( C.filter = C.red & E.filter = E.red)
    #debug "scalar\n"
  #else
    #debug "vector\n"
  #end

#end


-- 
#local R=rgb 99;#local P=R-R;#local F=pigment{gradient x}box{0,1pigment{gradient
y pigment_map{[.5F pigment_map{[.3R][.3F color_map{[.15red 99][.15P]}rotate z*45
translate x]}]#local H=pigment{gradient y color_map{[.5P][.5R]}scale 1/3}[.5F
pigment_map{[.3R][.3H][.7H][.7R]}]}}}camera{location.5-3*z}//only my opinions

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> It is very simple and I hope the manual explains it:  Use vstr to turn
> vectors and str to turn floats into strings.
>
>     Thorsten

Well, thanks, Thorsten.
But that was not exactly my problem. I #wrote only vectors to file, but when
I #read them in again, and tried to put them in a already declared
(array-)vector-identifier, I got errors like described in the first post.
I wanted to #debug and to see the content of what I #read out of the file.
Therefore I have to convert those (strange) mix of vectors and floats to
Strings. But how can I decide wether there's a vector or a float within my
identifier. I asked if there's a method like "isNumber(<identifier>)" and
"isVector(<identifier>)"...
Then I could use str of vstr, of course.

But I decided to work around that problem, by #writing to a file and
#including this one lateron instead of #reading it. (That's the way, it's
done in the examplefile life.pov)

Thank you anyway...

Kalle

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> #macro ScalarOrVector( A )
>
>   #local C = rgbft 0 + A;
>   #local D = A+1;
>   #local E = rgbft 0 + D;
>
>   #if ( C.filter = C.red & E.filter = E.red)
>     #debug "scalar\n"
>   #else
>     #debug "vector\n"
>   #end
>
> #end

Thank you Ron, I wil have a look into it.

Kalle

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I just had to start Povray 3.5 and wasn't ready to download 13 yet...

Kalle

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