91 lines
2.3 KiB
PHP
91 lines
2.3 KiB
PHP
<?php
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namespace swf2ass;
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class Vector2 {
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/** @var numeric */
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public $x;
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/** @var numeric */
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public $y;
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public function __construct($x, $y) {
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$this->x = $x;
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$this->y = $y;
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}
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/**
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* @return numeric[]
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*/
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public function toArray() : array{
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return [$this->x, $this->y];
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}
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public function equals(Vector2 $b, $epsilon = Constants::EPSILON): bool {
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return ($b->x === $this->x or abs($b->x - $this->x) <= $epsilon) and ($b->y === $this->y or abs($b->y - $this->y) <= $epsilon);
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}
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public function distance(Vector2 $b): float {
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return sqrt(pow($this->x - $b->x, 2) + pow($this->y - $b->y, 2));
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}
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public function distanceSquare(Vector2 $b): float {
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return pow($this->x - $b->x, 2) + pow($this->y - $b->y, 2);
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}
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public function invert(): Vector2 {
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return new Vector2($this->y, $this->x);
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}
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public function add(Vector2 $b): Vector2 {
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return new Vector2($this->x + $b->x, $this->y + $b->y);
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}
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public function sub(Vector2 $b): Vector2 {
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return new Vector2($this->x - $b->x, $this->y - $b->y);
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}
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public function abs(): Vector2 {
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return new Vector2(abs($this->x), abs($this->y));
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}
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/**
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* @param Vector2 $b
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* @return numeric
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*/
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public function dot(Vector2 $b) {
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return $this->x * $b->x + $this->y * $b->y;
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}
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public function squaredLength() : float {
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return $this->x * $this->x + $this->y * $this->y;
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}
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public function normalize() : Vector2{
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$len = $this->squaredLength();
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if($len > 0){
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return $this->divide(sqrt($len));
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}
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return new Vector2(0, 0);
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}
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public function vectorMultiply(Vector2 $b): Vector2 {
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return new Vector2($this->x * $b->x, $this->y * $b->y);
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}
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public function multiply($size): Vector2 {
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return new Vector2($this->x * $size, $this->y * $size);
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}
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public function divide($size): Vector2 {
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return new Vector2($this->x / $size, $this->y / $size);
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}
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public function toPixel($twipSize = Constants::TWIP_SIZE): Vector2 {
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return $this->divide($twipSize);
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}
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public function __toString() {
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return "Vector2({$this->x}, {$this->y})";
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}
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} |