Vibrating rectangles: Difference between revisions
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Thundergnat (talk | contribs) (→{{header|Perl 6}}: Add an SDL2 graphics lib version) |
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=={{header|Perl 6}}== |
=={{header|Perl 6}}== |
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{{works with|Rakudo|2018.06}} |
{{works with|Rakudo|2018.06}} |
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===ANSI graphics=== |
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Ok. The task description is essentially non-existent. In looking at the reference implementation (Ring) it seems like we are supposed to draw a series of concentric rectangles and then alter the colors step-wise. No actual vibration apparent. |
Ok. The task description is essentially non-existent. In looking at the reference implementation (Ring) it seems like we are supposed to draw a series of concentric rectangles and then alter the colors step-wise. No actual vibration apparent. |
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}</lang> |
}</lang> |
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See: [https://github.com/thundergnat/rc/blob/master/img/vibrating-rectangles-perl6.gif Vibrating rectangles] (.gif image) |
See: [https://github.com/thundergnat/rc/blob/master/img/vibrating-rectangles-perl6.gif Vibrating rectangles] (.gif image) |
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===SDL Animation=== |
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Fully animated SDL2 graphics lib version. Will adjust rendered rectangles to fill resized windows. Hit the space bar to toggle palette rotation direction. |
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<lang perl6>use SDL2::Raw; |
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my $width = 1200; |
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my $height = 800; |
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SDL_Init(VIDEO); |
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my $window = SDL_CreateWindow( |
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'Vibrating rectangles', |
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SDL_WINDOWPOS_CENTERED_MASK, |
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SDL_WINDOWPOS_CENTERED_MASK, |
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$width, $height, |
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RESIZABLE |
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); |
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my $render = SDL_CreateRenderer($window, -1, ACCELERATED +| PRESENTVSYNC); |
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my $event = SDL_Event.new; |
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enum KEY_CODES ( |
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K_SPACE => 44, |
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); |
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my $num = 80; |
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my @rgb = palette($num); |
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my ($cx, $cy); |
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my $dir = 1; |
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main: loop { |
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while SDL_PollEvent($event) { |
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my $casted_event = SDL_CastEvent($event); |
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given $casted_event { |
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when *.type == QUIT { last main } |
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when *.type == WINDOWEVENT { |
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if .event == 5 { |
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$width = .data1; |
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$height = .data2; |
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} |
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} |
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when *.type == KEYDOWN { |
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if KEY_CODES(.scancode) -> $comm { |
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given $comm { |
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when 'K_SPACE' { $dir *= -1; } |
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} |
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} |
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#say .scancode; # unknown key pressed |
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} |
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} |
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} |
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($cx, $cy) = $width div 2, $height div 2; |
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for 1..^$num { |
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my ($x, $y) = ($cx - ($width/2/$num*$_), $cy - ($height/2/$num*$_))».round; |
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my ($w, $h) = ($width/$num*$_, $height/$num*$_)».round; |
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SDL_SetRenderDrawColor($render, |@rgb[$_], 255); |
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SDL_RenderDrawRect($render, SDL_Rect.new(:x($x), :y($y), :w($w), :h($h))); |
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} |
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@rgb.=rotate($dir); |
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SDL_RenderPresent($render); |
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SDL_SetRenderDrawColor($render, 0, 0, 0, 0); |
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SDL_RenderClear($render); |
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} |
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SDL_Quit(); |
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sub palette ($l) { (^$l).map: { hsv2rgb(($_ * 360/$l % 360)/360, 1, 1).list } }; |
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sub hsv2rgb ( $h, $s, $v ){ # inputs normalized 0-1 |
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my $c = $v * $s; |
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my $x = $c * (1 - abs( (($h*6) % 2) - 1 ) ); |
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my $m = $v - $c; |
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my ($r, $g, $b) = do given $h { |
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when 0..^(1/6) { $c, $x, 0 } |
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when 1/6..^(1/3) { $x, $c, 0 } |
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when 1/3..^(1/2) { 0, $c, $x } |
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when 1/2..^(2/3) { 0, $x, $c } |
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when 2/3..^(5/6) { $x, 0, $c } |
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when 5/6..1 { $c, 0, $x } |
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} |
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( $r, $g, $b ).map: ((*+$m) * 255).Int |
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}</lang> |
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=={{header|Phix}}== |
=={{header|Phix}}== |
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