36 lines
1.2 KiB
Text
36 lines
1.2 KiB
Text
use MONKEY_TYPING;
|
|
augment class Pixel { method Str { "$.R $.G $.B" } }
|
|
augment class Bitmap {
|
|
method P3 {
|
|
join "\n", «P3 "$.width $.height" 255»,
|
|
do for ^$.height { join ' ', @.data[]»[$_] }
|
|
}
|
|
method raster-circle ( $x0, $y0, $r, Pixel $value ) {
|
|
my $f = 1 - $r;
|
|
my $ddF_x = 0;
|
|
my $ddF_y = -2 * $r;
|
|
my ($x, $y) = 0, $r;
|
|
self.set-pixel($x0, $y0 + $r, $value);
|
|
self.set-pixel($x0, $y0 - $r, $value);
|
|
self.set-pixel($x0 + $r, $y0, $value);
|
|
self.set-pixel($x0 - $r, $y0, $value);
|
|
while $x < $y {
|
|
if $f >= 0 {
|
|
$y--;
|
|
$ddF_y += 2;
|
|
$f += $ddF_y;
|
|
}
|
|
$x++;
|
|
$ddF_x += 2;
|
|
$f += $ddF_x + 1;
|
|
self.set-pixel($x0 + $x, $y0 + $y, $value);
|
|
self.set-pixel($x0 - $x, $y0 + $y, $value);
|
|
self.set-pixel($x0 + $x, $y0 - $y, $value);
|
|
self.set-pixel($x0 - $x, $y0 - $y, $value);
|
|
self.set-pixel($x0 + $y, $y0 + $x, $value);
|
|
self.set-pixel($x0 - $y, $y0 + $x, $value);
|
|
self.set-pixel($x0 + $y, $y0 - $x, $value);
|
|
self.set-pixel($x0 - $y, $y0 - $x, $value);
|
|
}
|
|
}
|
|
}
|