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package technology.zim
import technology.zim.data.Tile
import kotlin.math.abs
//A* to be upgraded with hierarchies
//Needs https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/PriorityQueue.html
//and https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Comparator.html
object PathFinder {
val path = ArrayDeque<Tile>()
//work along the path, marking tiles with VISITED along the way
//if marking with visited is too expensive, just make the path and finalize it
fun generatePath(start: Tile, end: Tile) {
if(!start.isInBounds() || !end.isInBounds()) {
throw IndexOutOfBoundsException("Cannot generate a path to or from an out of bounds tile")
}
}
//Heuristic value, to estimate the cost of a given tile
fun hValue(prospect: Tile, end: Tile): Int {
return abs(prospect.x() - end.x()) + abs(prospect.y() - end.y())
}
//Step through the path, marking each Tile with INPATH
fun finalizePath() {
}
}