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<?php |
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/* |
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* This file is part of the CGI-Calc package. |
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* |
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* (c) Milos Tomic <[email protected]> |
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* |
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* This source file is subject to the MIT license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace Cgi\Calc\Point; |
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use Cgi\Calc\Point; |
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class PointSet extends \SplObjectStorage |
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{ |
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/** |
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* @param PointSet $other |
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* |
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* @return PointSet |
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*/ |
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public static function duplicate(PointSet $other) |
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{ |
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$result = new self(); |
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$result->addAll($other); |
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return $result; |
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} |
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/** |
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* @param Point[] $points |
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*/ |
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public function __construct(array $points = []) |
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{ |
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foreach ($points as $point) { |
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if ($point instanceof Point) { |
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$this->attach($point); |
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} else { |
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throw new \InvalidArgumentException('PointSet can index instances of Point only'); |
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} |
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} |
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} |
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/** |
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* @param PointSet $other |
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* |
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* @return PointSet |
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*/ |
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public function intersect(PointSet $other) |
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{ |
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$result = new self(); |
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$result->addAll($this); |
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$result->removeAllExcept($other); |
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return $result; |
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} |
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/** |
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* @param PointSet $other |
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* |
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* @return PointSet |
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*/ |
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public function union(PointSet $other) |
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{ |
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$result = new self(); |
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$result->addAll($this); |
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$result->addAll($other); |
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return $result; |
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} |
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/** |
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* @param PointSet $other |
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* |
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* @return PointSet |
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*/ |
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public function diff(PointSet $other) |
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{ |
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$result = new self(); |
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$result->addAll($this); |
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$result->removeAll($other); |
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return $result; |
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} |
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public function getHash($object) |
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{ |
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if ($object instanceof Point) { |
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return $object->hash(); |
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} |
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throw new \InvalidArgumentException('PointSet can index instances of Point only'); |
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} |
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/** |
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* @param callable $callback |
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* |
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* @return PointSet |
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*/ |
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public function map($callback) |
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{ |
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$result = new self(); |
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foreach ($this as $point) { |
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$value = $this[$point]; |
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if (call_user_func($callback, $point, $value)) { |
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$result->attach($point, $value); |
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} |
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} |
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return $result; |
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} |
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/** |
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* @param callable $callback |
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* @param mixed $initial |
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* |
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* @return mixed |
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*/ |
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public function reduce($callback, $initial) |
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{ |
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foreach ($this as $point) { |
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$initial = call_user_func($callback, $point, $this[$point]); |
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} |
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return $initial; |
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} |
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/** |
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* @return Line |
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*/ |
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public function smallestRectangularEnvelope() |
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{ |
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$minX = $minY = $maxX = $maxY = null; |
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/** @var Point $point */ |
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foreach ($this as $point) { |
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if ($minX === null || $minX > $point->getX()) { |
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$minX = $point->getX(); |
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} |
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if ($minY === null || $minY > $point->getY()) { |
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$minY = $point->getY(); |
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} |
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if ($maxX === null || $maxX < $point->getX()) { |
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$maxX = $point->getX(); |
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} |
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if ($maxY === null || $maxY < $point->getY()) { |
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$maxY = $point->getY(); |
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} |
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} |
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return new Line(new Point($minX, $minY), new Point($maxX, $maxY)); |
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} |
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} |
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tmilos /
cgi-calc
