Re: build array of geometry data

[MZSanford]

I don't know renderman, so i am not sure how complex this is going to grow to, but i think the following will do something similar to what you are asking about : lightly-tested code ahead

#!/usr/bin/perl

my $string;
{
    $/ = undef;
    $string = <DATA>;
}

while ($string =~ m!\[\s*([^]]+)\]!g) {
    my @nums = split(/\s+/,$1);
    print "Array : ",join(',',@nums),"\n";
   
}

__DATA__
[1 1 1 1 1 1 ][4 4 4 4 4 4]

[ 123 123 123
  123 123 123
  123 123 123 ]

"P"

[ -1 1 1
  1 1 -1
  1 1 1 ]

If renderman has a very complex file format, you may want to write a more robust parser.

---

from the frivolous to the serious

[Frippe]

Thanks for your fast reply !!!

I use the open ( INPUT, .....)
to read in the file and I want to seprate the 4 array's

so something like this

my @nloops = ...;
my @lverts = ...;
my @vertid  = ...;
my @paramslist = ...;

so your code was nice to print this info but I like to
asign it to 4 array ex.

my @nloops = [ ... ];
my @lverts = [ ... ];
my @vertid = [ ... ];
my @params = [ ... ];

next I could count the array length this I know how to
next I could build a for loop to assign 1 array and first value to new
+ data format ...

ex.

change the data
0.5 0.5 0.5 add 1 -------- first array
to output
0.5 0.5 0.5 1
Print some info here !!!
4 < 1 2 3 4
Print end info !!!

so in another words the 4 arrays need to be seprate.
ex.

print @nloops;
OUT
1,1,1,1,1

print @lverts;
OUT
4,4,4,4,4

...

[MZSanford]

I am unsure what you mean about changing the data. While i am not quite clear on that, i do understand you want to save each array of numbers seperatly. To accomplish this, i used an Array of Arrays. The code is listed below (it is untested) :

#!/usr/bin/perl

my $string;
{
    $/ = undef;
    $string = <DATA>;
}

my @collection;
while ($string =~ m!\[\s*([^]]+)\]!g) {
    my @nums = split(/\s+/,$1);
    print "Array : ",join(',',@nums),"\n";
    push(@collection,\@nums);   
}

## Now, i have an array or arrays, like :
#
# @collection = (
#    [1,1,1,...],
#    [4,4,4,...],
#    [123,123,123,123,...],
#    [-1,1,1,1,1,...],
# )

print "nloops : ",join(',',@{$collection[0]}),"\n";
print "lverts : ",join(',',@{$collection[1]}),"\n";
print "vertid : ",join(',',@{$collection[2]}),"\n";
print "params : ",join(',',@{$collection[3]}),"\n";

__DATA__
[1 1 1 1 1 1 ][4 4 4 4 4 4]

[ 123 123 123
  123 123 123
  123 123 123 ]

"P"

[ -1 1 1
  1 1 -1
  1 1 1 ]

I do not understand what you wrote about changing the data, but from what i posted i think you should be able to work out the seperate array issue which should put you well on your way.

---

from the frivolous to the serious

[Frippe]

Thanks, maybe it me but I use ex.

my @nloops = join(',',@{$collection[0]});

and try

print @nloops[1]
OUT
[1,1,1,1,1]
but the correct should be
1

To make this little test a more clear view from my part
as you could see there are 4 array in the renderman rib

ex.

for ($i = 0; $i < array_length; $i ++ ) {
   print @params[0+$i] @params[1+$i] @params[2+$i] 1;
}

this would be output:
-1 1 1
1 1 -1
1 1 1
...

next
I apply a custom string in
print "Run $count_lvert_length Poly\n";

for ($i = 0; $i < count_lverts*4; $i += 4 ) {
   if ( $lverts[0+($i/4)] == 3 ) {
       print "$lverts[0+($i/4)] < $vertid[2+$i] 
                    $vertid[1+$i] $vertid[0+$i]\n";
   } else {
       print "$lverts[0+($i/4)] < $vertid[3+$i] 
              $vertid[2+$i] $vertid[1+$i] $vertid[0+$i]\n";
   }
}

append the end line !!!

----------------------------------

here is the 'renderman' rib example
this file this what I read in and like to get data from

# Starting polys
PointsGeneralPolygons
    [1 1 1 1 1 1] [4 4 4 4 4 4] 
    [ 0 4 5 1 
      1 5 6 2 
      2 6 7 3 
      3 7 4 0 
      3 0 1 2 
      4 7 6 5 ]
  "P" [ -0.5 -0.5 -0.5 0.5 -0.5 -0.5 0.5 -0.5  0.5 
        -0.5 -0.5  0.5 -0.5  0.5 -0.5 0.5  0.5 -0.5
         0.5  0.5  0.5 -0.5  0.5  0.5 ]
# Starting curves
# Done curves

---------------------------

and this is the code I trying to get Perl to make for me !!!

-0.5 -0.5 -0.5 1 
0.5 -0.5 -0.5 1 
0.5 -0.5 0.5 1 
-0.5 -0.5 0.5 1 
-0.5 0.5 -0.5 1 
0.5 0.5 -0.5 1 
0.5 0.5 0.5 1 
-0.5 0.5 0.5 1 
Run 6 Poly
 4 < 1 5 4 0
 4 < 2 6 5 1
 4 < 3 7 6 2
 4 < 0 4 7 3
 4 < 2 1 0 3
 4 < 5 6 7 4


regards,
Fredrik Gustafsson

[Frippe]

hi

I'm not sure my message was send correct !!!

here is the 'renderman' rib file.
-----------------------------------
# Starting polys
PointsGeneralPolygons
    [1 1 1 1 1 1] [4 4 4 4 4 4] 
    [ 0 4 5 1 
      1 5 6 2 
      2 6 7 3 
      3 7 4 0 
      3 0 1 2 
      4 7 6 5 ]
  "P" [ -0.5 -0.5 -0.5 0.5 -0.5 -0.5 0.5 -0.5  0.5 
        -0.5 -0.5  0.5 -0.5  0.5 -0.5 0.5  0.5 -0.5
         0.5  0.5  0.5 -0.5  0.5  0.5 ]
# Starting curves
# Done curves
------------------------------

and here is the code I like  Perl to do for me.

-------------------------------------------
-0.5 -0.5 -0.5 1 
0.5 -0.5 -0.5 1 
0.5 -0.5 0.5 1 
-0.5 -0.5 0.5 1 
-0.5 0.5 -0.5 1 
0.5 0.5 -0.5 1 
0.5 0.5 0.5 1 
-0.5 0.5 0.5 1 
Run 6 Poly
 4 < 1 5 4 0
 4 < 2 6 5 1
 4 < 3 7 6 2
 4 < 0 4 7 3
 4 < 2 1 0 3
 4 < 5 6 7 4
-------------------------------------

regards,
Fredrik Gustafsson