extract function to CoordinateConverter

TODO.md

@@ -3,7 +3,7 @@
 # 1
 * add forest heatmap
   * support scaling!
-  * TODO >>> extract to 3d-2d converter (_3dZTo2dY ....)
+  * extract forest colors to MapScheme
   * /api/v1/configuration/map-tools/resources/forest?mapName= tooks way too long; does it already make use of the resource_name, class_name and prefab_name tables?   
   * cache forest and/or spatialForestMap
 

libs/commons/src/main/java/com/recom/commons/calculator/CoordinateConverter.java

@@ -0,0 +1,16 @@
+package com.recom.commons.calculator;
+
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor
+public class CoordinateConverter {
+
+    public double threeDeeZToTwoDeeY(
+            final double y,
+            final int demHeight,
+            final double stepSize
+    ) {
+        return demHeight * stepSize - y;
+    }
+
+}

libs/commons/src/main/java/com/recom/commons/map/rasterizer/ForestMapRasterizer.java

@@ -1,5 +1,6 @@
 package com.recom.commons.map.rasterizer;
 
+import com.recom.commons.calculator.CoordinateConverter;
 import com.recom.commons.calculator.d8algorithm.D8AlgorithmForForestMap;
 import com.recom.commons.map.MapComposer;
 import com.recom.commons.map.rasterizer.configuration.LayerOrder;
@@ -29,6 +30,8 @@
 @RequiredArgsConstructor
 public class ForestMapRasterizer implements MapLayerRasterizer {
 
+    @NonNull
+    private final CoordinateConverter coordinateConverter;
     @NonNull
     private final MapComposer mapComposer;
     @NonNull
@@ -109,7 +112,7 @@ public void render(@NonNull MapComposerWorkPackage workPackage) {
             forestEntities.forEach(forestItem -> {
                 final int x = Round.halfUp(forestItem.getCoordinateX().doubleValue() / stepSize);
 
-                final double normalizedYCoordinate = _3dZTo2dY(forestItem.getCoordinateY().doubleValue(), demHeight, stepSize);
+                final double normalizedYCoordinate = coordinateConverter.threeDeeZToTwoDeeY(forestItem.getCoordinateY().doubleValue(), demHeight, stepSize);
                 final int y = Round.halfUp(normalizedYCoordinate / stepSize);
 
                 if (x >= 0 && x < demWidth && y >= 0 && y < demHeight) {
@@ -125,17 +128,4 @@ public void render(@NonNull MapComposerWorkPackage workPackage) {
         }
     }
 
-
-
-
-
-    // TODO >>> extract to 3d-2d converter
-    public double _3dXTo2dX(final double x,final int demWidth, final double stepSize) {
-        return demWidth * stepSize - x;
-    }
-
-    public double _3dZTo2dY(final double y, final int demHeight, final double stepSize) {
-        return demHeight * stepSize - y;
-    }
-
 }