in reply to Creative presentation algorithm: IP to a color

How many IPs do you expect as a max?

Why not choose a list of colors, a suitable hash function for IPs, and use $color{hash(@ip)}?

-QM
--
Quantum Mechanics: The dreams stuff is made of

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Re^2: Creative presentation algorithm: IP to a color
by eXile (Priest) on Aug 29, 2005 at 02:40 UTC
    MD5 could be used as a hash function here on the IP-string (or any string as a matter of fact), and the first 3 pairs of hex-characters could be used as rgb values: 
    #!/usr/bin/perl -l
use strict;
use Digest::MD5 qw(md5_hex);


my $ip="192.168.7.1";
my $ip2="192.168.7.2";
my $ip3="192.168.7.3";
my $ip4="192.168.7.4";

print join(",", ip2color($ip));
print join(",", ip2color($ip2));
print join(",", ip2color($ip3));
print join(",", ip2color($ip4));

sub ip2color {
        my ($ip) = @_;
        my $md5 = md5_hex($ip);
        my @rgb;
        foreach (0 .. 2) {
                my $value_in_hex = substr($md5,0+2*$_,2);
                push @rgb, hex($value_in_hex);
        }
        return @rgb;
}
__DATA__
251,180,114
35,50,113
80,124,60
221,201,172

    [download]
    Not meaningful for the eye these colors (like Zaxo's solution), but neighboring IPs very likely will have different colors.
[reply]
[d/l]
Re^2: Creative presentation algorithm: IP to a color
by Your Mother (Archbishop) on Aug 29, 2005 at 01:59 UTC

    Indeterminate really; visitors' IPs from anywhere. Assume all of them. :) I liked Zaxo's below and I'm going to play with it. Love to see more ideas too. Just for fun.

[reply]

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