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<?php |
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namespace Samsara\Fermat\Values; |
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use Samsara\Exceptions\UsageError\IntegrityConstraint; |
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use Samsara\Fermat\Numbers; |
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use Samsara\Fermat\Types\Tuple; |
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use Samsara\Fermat\Types\Base\CoordinateInterface; |
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class CartesianCoordinate extends Tuple implements CoordinateInterface |
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{ |
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/** |
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* @var array |
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*/ |
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protected $axes; |
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public function __construct(array $data) |
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{ |
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$zeroIndexedData = []; |
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foreach ($data as $axis => $value) { |
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$this->axes[$axis] = count($zeroIndexedData); |
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$zeroIndexedData[] = $value; |
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} |
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parent::__construct($zeroIndexedData); |
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} |
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public function getAxis($axis): ImmutableNumber |
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{ |
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return $this->get($this->axes[$axis]); |
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} |
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public function numberOfDimensions(): int |
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{ |
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return $this->size(); |
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} |
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public function axisValues(): array |
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{ |
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return $this->all(); |
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} |
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public function distanceTo(CoordinateInterface $coordinate): ImmutableNumber |
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{ |
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if (!($coordinate instanceof CartesianCoordinate)) { |
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throw new IntegrityConstraint( |
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'Must be the same coordinate system', |
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'Only attempt to get distance between coordinates that use the same coordinate system', |
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'Distance cannot be calculated between coordinates that use different coordinate systems because the properties necessary to convert them cannot be assumed' |
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); |
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} |
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if ($this->size() != $coordinate->size()) { |
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throw new IntegrityConstraint( |
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'Must have same dimensionality', |
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'Check dimensionality of both coordinates before getting distance', |
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'Coordinates must share the same number of axes in order for a distance to be calculated' |
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); |
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} |
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/** @var ImmutableNumber $n */ |
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$n = Numbers::makeZero(); |
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foreach ($this->all() as $index => $value) { |
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$n = $n->add($coordinate->get($index)->subtract($value)->pow(2)); |
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} |
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$n = $n->sqrt(); |
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return $n; |
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} |
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} |
JordanRL /
Fermat
