34 lines
1.5 KiB
PHP
34 lines
1.5 KiB
PHP
<?php
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define("CIRCLE_R", 50);
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$colors_number = count($colors);
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$total_votes = 0;
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foreach ($poll->options as $option)
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$total_votes += $option->votes;
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$options_percentages = [];
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foreach ($poll->options as $option)
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$options_percentages[] = $option->votes / $total_votes;
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function percentage_pos_x($r, $percentage)
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{ return round($r * sin(2 * M_PI * $percentage), 2); }
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function percentage_pos_y($r, $percentage)
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{ return -1*round($r * cos(2 * M_PI * $percentage), 2); }
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//TODO Improve by showing values in the colors.
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?>
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="-<?= CIRCLE_R ?> -<?= CIRCLE_R ?> <?= CIRCLE_R*2 ?> <?= CIRCLE_R*2 ?>">
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<circle cx="0" cy="0" r="<?= CIRCLE_R ?>" fill="black" fill-opacity="0.2"></circle>
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<?php
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$used_percentage = 0;
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foreach ($poll->options as $index => $option):
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if($options_percentages[$index] == 1): ?>
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<circle cx="0" cy="0" r="<?= CIRCLE_R ?>" fill="<?= $colors[$index%$colors_number] ?>"></circle>
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<?php elseif($options_percentages[$index] != 0): ?>
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<path d="M<?= percentage_pos_x(CIRCLE_R, $used_percentage) ?> <?= percentage_pos_y(CIRCLE_R, $used_percentage) ?> A<?= CIRCLE_R." ".CIRCLE_R ?> 0 <?= ($options_percentages[$index] > 0.5 ? 1 : 0) ?> 1 <?= percentage_pos_x(CIRCLE_R, $used_percentage + $options_percentages[$index]) ?> <?= percentage_pos_y(CIRCLE_R, $used_percentage + $options_percentages[$index]) ?> L0 0" fill="<?= $colors[$index%$colors_number] ?>"></path>
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<?php endif; ?>
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<?php $used_percentage += $options_percentages[$index]; endforeach; ?>
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</svg>
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