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<?php |
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/** |
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* Class used to keep track of paths between two sectors. |
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* Used by the Plotter class to store the state of a plotted course. |
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*/ |
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class Distance { |
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private $gameID; |
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private $distance = -1; //First sector added will be the start and a distance of 0 |
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private $numWarps = 0; |
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private $path = array(); |
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private $warpMap = array(); |
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public function __construct($gameID,$_startSectorId) { |
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$this->gameID = $gameID; |
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$this->addToPath($_startSectorId); |
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} |
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protected function incrementDistance() { |
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$this->distance++; |
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} |
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protected function incrementNumWarps() { |
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$this->numWarps++; |
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} |
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public function getDistance() { |
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return $this->distance; |
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} |
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public function getTotalSectors() { |
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return $this->getDistance()+$this->getNumWarps(); |
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} |
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public function getNumWarps() { |
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return $this->numWarps; |
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} |
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public function getTurns() { |
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return $this->distance * TURNS_PER_SECTOR + $this->numWarps * TURNS_PER_WARP; |
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} |
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public function getRelativeDistance() { |
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return $this->distance + $this->numWarps * TURNS_WARP_SECTOR_EQUIVALENCE; |
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} |
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/** |
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* @return integer |
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*/ |
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public function getEndSectorID() { |
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return $this->path[count($this->path)-1]; |
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} |
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public function &getEndSector() { |
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return SmrSector::getSector($this->gameID,$this->getEndSectorID()); |
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} |
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/** |
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* @return array |
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*/ |
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public function getPath() { |
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return $this->path; |
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} |
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// NOTE: this assumes 2-way warps |
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public function reversePath() { |
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$this->path = array_reverse($this->path); |
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$this->warpMap = array_flip($this->warpMap); |
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} |
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/** |
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* @param integer $nextSector |
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*/ |
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public function addToPath($nextSector) { |
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$this->incrementDistance(); |
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$this->path[] = $nextSector; |
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} |
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public function addWarpToPath($sectorAfterWarp, $sectorBeforeWarp) { |
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$this->incrementNumWarps(); |
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$this->path[] = $sectorAfterWarp; |
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$this->warpMap[$sectorBeforeWarp] = $sectorAfterWarp; |
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} |
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public function getNextOnPath() { |
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return $this->path[0]; |
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} |
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public function followPath() { |
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$nextSectorID = array_shift($this->path); |
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if (in_array($nextSectorID, $this->warpMap)) { |
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$this->numWarps--; |
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} else { |
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$this->distance--; |
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} |
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} |
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public function removeStart() { |
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return array_shift($this->path); |
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} |
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public function isInPath($sectorID) { |
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return in_array($sectorID,$this->getPath()); |
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} |
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/** |
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* If the given sector is in the path, then return the segment |
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* of the path that comes after the given sector. |
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*/ |
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public function skipToSector($sectorID) { |
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$position = array_search($sectorID, $this->path); |
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if ($position !== false) { |
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// The resulting path does not include sectorID, i.e. (sectorID,end] |
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$this->path = array_slice($this->path, $position + 1); |
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$this->numWarps = count(array_intersect($this->path, array_values($this->warpMap))); |
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$this->distance = count($this->path) - $this->numWarps; |
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return $this; |
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} else { |
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throw new Exception('Cannot skip to sector not in path!'); |
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} |
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} |
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} |
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smrealms /
smr
