Some initial PathFinder work

.idea/misc.xml

@@ -4,7 +4,7 @@
   <component name="FrameworkDetectionExcludesConfiguration">
     <file type="web" url="file://$PROJECT_DIR$" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" project-jdk-name="temurin-11" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="temurin-11" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

src/main/kotlin/PathFinder.kt

@@ -0,0 +1,40 @@
+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() {
+
+    }
+
+}

src/main/kotlin/Pathfinder.kt

@@ -1,10 +0,0 @@
-package technology.zim
-
-//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
-
-class Pathfinder {
-
-}