#369 monitor vector tiles poc - avoid negative tile x and y

vmarc · Dec 15, 2023 · 0f49a90 · 0f49a90
1 parent 1e6921c
commit 0f49a90
Showing 1 changed file with 10 additions and 6 deletions.
diff --git a/server/src/main/scala/kpn/server/analyzer/engine/tile/LineSegmentTileCalculatorImpl.scala b/server/src/main/scala/kpn/server/analyzer/engine/tile/LineSegmentTileCalculatorImpl.scala
@@ -40,12 +40,16 @@ class LineSegmentTileCalculatorImpl(tileCalculator: TileCalculator) extends Line
     xDelta: Int,
     yDelta: Int
   ): Unit = {
-    val adjecentTile = tileCalculator.tileXY(tile.z, tile.x + xDelta, tile.y + yDelta)
-    if (!foundTiles.map(_.name).contains(adjecentTile.name)) {
-      if (lineSegments.exists(_.intersection(side) != null)) {
-        tileQueue += adjecentTile
-        foundTiles += adjecentTile
-        ()
+    val x = tile.x + xDelta
+    val y = tile.y + yDelta
+    if (x >= 0 && y >= 0) {
+      val adjecentTile = tileCalculator.tileXY(tile.z, x, y)
+      if (!foundTiles.map(_.name).contains(adjecentTile.name)) {
+        if (lineSegments.exists(_.intersection(side) != null)) {
+          tileQueue += adjecentTile
+          foundTiles += adjecentTile
+          ()
+        }
       }
     }
   }