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<?php |
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/* |
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* This file is part of the core-library package. |
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* |
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* (c) 2020 WEBEWEB |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace WBW\Library\Core\Geometry; |
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use WBW\Library\Core\Model\Attribute\FloatXTrait; |
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use WBW\Library\Core\Model\Attribute\FloatYTrait; |
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/** |
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* Point. |
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* |
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* @author webeweb <https://github.com/webeweb> |
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* @package WBW\Library\Core\Geometry |
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*/ |
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class Point { |
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use FloatXTrait; |
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use FloatYTrait; |
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/** |
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* Constructor. |
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* |
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* @param float $x The x. |
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* @param float $y The y. |
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*/ |
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public function __construct($x = null, $y = null) { |
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$this->setX($x); |
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$this->setY($y); |
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} |
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/** |
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* Distance d = sqrt(a² + b²). |
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* |
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* @param Point $p The point. |
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* @return float Returns the distance. |
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*/ |
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public function d(Point $p): float { |
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$x = $this->getX() - $p->getX(); |
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$y = $this->getY() - $p->getY(); |
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$x2 = $x * $x; |
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$y2 = $y * $y; |
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return sqrt($x2 + $y2); |
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} |
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/** |
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* Degree. |
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* |
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* @param Point $p The point. |
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* @return Angle Returns the degree. |
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*/ |
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public function deg(Point $p): Angle { |
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$rad = $this->rad($p); |
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return new Angle($rad->deg(), Angle::UNIT_DEGREE); |
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} |
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/** |
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* Slope m = (y2 - y1) / (x2 - x1). |
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* |
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* @param Point $p The point. |
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* @return float Returns the slope. |
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*/ |
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public function m(Point $p): float { |
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$x = $this->getX() - $p->getX(); |
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$y = $this->getY() - $p->getY(); |
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if (0 == $x) { |
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return INF; |
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} |
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return $y / $x; |
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} |
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/** |
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* Radian. |
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* |
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* @param Point $p The point. |
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* @return Angle Returns the radian. |
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*/ |
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public function rad(Point $p): Angle { |
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$m = $this->m($p); |
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if (INF !== $m) { |
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return new Angle(atan($m)); |
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} |
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$rad = pi() / 2; |
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return new Angle($p->getY() < $this->getY() ? $rad : -$rad); |
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} |
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/** |
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* Rotate. |
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* |
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* @param Point $o The point. |
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* @param Angle $a The angle. |
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* @return Point Returns the rotated point. |
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*/ |
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public function rotate(Point $o, Angle $a): Point { |
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$rad = $a->rad(); |
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$dX = $this->getX() - $o->getX(); |
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$dY = $this->getY() - $o->getY(); |
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$x = $dX * cos($rad) + $dY * sin($rad) + $o->getX(); |
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$y = -$dX * sin($rad) + $dY * cos($rad) + $o->getY(); |
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return new Point($x, $y); |
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} |
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} |
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webeweb /
core-library
