IndyIndyIndy/landmap-generation

<?php

namespace ChristianEssl\LandmapGeneration\Struct;

use ChristianEssl\LandmapGeneration\Utility\Random;

class Tetrahedon
{
    public Vertex $A;
    public Vertex $B;
    public Vertex $C;
    public Vertex $D;

    public function __construct(Vertex $A, Vertex $B, Vertex $C, Vertex $D)
    {
        $this->A = $A;
        $this->B = $B;
        $this->C = $C;
        $this->D = $D;
    }

    public static function createRandomForAltitude(float $altitude): self
    {
        $A = new Vertex(
            Random::getRandomCoordinate(false),
            Random::getRandomCoordinate(false),
            Random::getRandomCoordinate(false),
            $altitude,
            Random::getNextPosNegFloat()
        );
        $B = new Vertex(
            Random::getRandomCoordinate(false),
            Random::getRandomCoordinate(true),
            Random::getRandomCoordinate(true),
            $altitude,
            Random::getNextPosNegFloat()
        );
        $C = new Vertex(
            Random::getRandomCoordinate(true),
            Random::getRandomCoordinate(false),
            Random::getRandomCoordinate(true),
            $altitude,
            Random::getNextPosNegFloat()
        );
        $D = new Vertex(
            Random::getRandomCoordinate(true),
            Random::getRandomCoordinate(true),
            Random::getRandomCoordinate(false),
            $altitude,
            Random::getNextPosNegFloat()
        );

        return new self($A, $B, $C, $D);
    }

    public static function copy(Tetrahedon $tetrahedon): self
    {
        return new self(
            clone $tetrahedon->A,
            clone $tetrahedon->B,
            clone $tetrahedon->C,
            clone $tetrahedon->D
        );
    }

    /**
     * Return array of vertices to check against for ordering (to make AB the longest edge)
     */
    public function getVerticeChecks(): array
    {
        return [
            'AC' => [$this->A, $this->C, $this->B, $this->D],
            'AD' => [$this->A, $this->D, $this->B, $this->C],
            'BC' => [$this->B, $this->C, $this->A, $this->D],
            'BD' => [$this->B, $this->D, $this->A, $this->C],
            'CD' => [$this->C, $this->D, $this->A, $this->B],
        ];
    }

}