50 lines
1.3 KiB
PHP
50 lines
1.3 KiB
PHP
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<?php
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/**
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* This class contains some library-functions for converting a string to a color [depending on certain modes].
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* @author JPT
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*/
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class CharColorConverter {
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/**
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* Returns an array with RGB for the corresponding index.
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* @param int $index Index from 0 to 1530. (Everything above will result the same)
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* @return array
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* TODO: Function to reverse this one.
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* NOTICE: I will use 0 - 1275 for human readability;
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*/
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protected function index2rgb($index = 0) {
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$r = 255;
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$g = 0;
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$b = 0;
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//the elseif fixes a glitch.
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for($i = 0; $i < $index; $i++) {
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if($r < 255 && $g === 0 && $b === 255) $r++;
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elseif($r === 255 && $g < 255 && $b === 0) $g++;
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elseif($r === 0 && $g === 255 && $b < 255) $b++;
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elseif($r > 0 && $g === 255 && $b === 0) $r--;
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elseif($r === 0 && $g > 0 && $b === 255) $g--;
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elseif($r === 255 && $g === 0 && $b > 0) $b--;
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//DEBUG
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//$k = $i + 1;
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//echo "I:$k\t$r,$g,$b\r\n";
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}
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return array($r, $g, $b);
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}
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/**
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* Converts a single char to a string.
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* @param string $string
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* @return array RGB
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*/
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public function charToColor($string) {
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if(strlen($string) === 0) throw new Exception("Empty string given!");
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$index = ord($string) * 5;
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$color = $this->index2rgb($index);
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return $color;
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}
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}
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?>
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