- if ($grey) {
- $h = 30; # greyscale hue
- $s -= 2; # lowest saturation for other hues
- $v = $s = 0 if $s < 0; # black at full saturation
- }
+ for my $r (0 .. $dim - 1) {
+ for my $g (0 .. $dim - 1) {
+ for my $b (0 .. $dim - 1) {
+ my $index = $r*$dim*$dim + $g*$dim + $b + $offset;
+ my @rgb = map { $rgbval->($_) } $r, $g, $b;
+
+ my $h = Shiar_Sheet::Colour->new(@rgb)->hue * $hmax;
+ my $v = int(max(@rgb) / 255 * $vmax);
+ my $s = abs(min(@rgb) - max(@rgb)) / 255 * $smax;
+
+ if (!$s) {
+ $greymap{$index} = $rgb[0];
+ next;
+ }