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<?php |
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/* |
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MIT License |
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Copyright (c) 2014 Peter Petermann |
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Permission is hereby granted, free of charge, to any person |
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obtaining a copy of this software and associated documentation |
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files (the "Software"), to deal in the Software without |
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restriction, including without limitation the rights to use, |
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copy, modify, merge, publish, distribute, sublicense, and/or sell |
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copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following |
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conditions: |
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The above copyright notice and this permission notice shall be |
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included in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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OTHER DEALINGS IN THE SOFTWARE. |
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*/ |
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namespace PathFinder; |
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abstract class Node |
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{ |
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/** |
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* @var Node|bool |
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*/ |
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protected $parent = false; |
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/** |
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* @var int|float |
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*/ |
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protected $gCost; |
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/** |
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* @param Node $parent |
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*/ |
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public function setParent(Node $parent) |
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{ |
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$this->parent = $parent; |
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} |
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/** |
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* @return Node|bool |
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*/ |
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public function getParent() |
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{ |
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return $this->parent; |
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} |
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/** |
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* @return int|float |
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*/ |
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public function getGCost() |
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{ |
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if(is_null($this->gCost)) { |
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$this->gCost = |
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$this->parent ? $this->parent->getGCost() + $this->getOwnCost() : $this->getOwnCost(); |
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} |
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return $this->gCost; |
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} |
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/** |
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* @param Node $target |
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* @return float|int |
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*/ |
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public function getFCost(Node $target) |
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{ |
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return $this->getGCost() + $this->getHCost($target); |
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} |
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/** |
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* @return int|float |
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*/ |
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abstract public function getOwnCost(); |
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/** |
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* @param Node $target |
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* @return int|float |
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*/ |
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abstract public function getHCost(Node $target); |
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/** |
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* @return Node[] |
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*/ |
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abstract public function getAdjacentNodes(); |
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/** |
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* @param Node $compareTo |
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* @return bool |
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*/ |
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abstract public function equals(Node $compareTo); |
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/** |
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* should return a unique string for this |
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* |
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* @return string |
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*/ |
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abstract public function __toString(); |
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/** |
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* this method should allow a node |
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* to get the data from the target node getHostCost requires for its heuristic (if needed) |
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* |
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* @return array |
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*/ |
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public function getDataForH() |
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{ |
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return []; |
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} |
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} |
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|
ppetermann /
pathfinder
