Refactor: Add BBox calculation for single CityObjects

CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/database/DatabaseHandler.java

@@ -76,7 +76,7 @@ public class DatabaseHandler {
         try (Connection con = new ConnectionWrapper(H2GISDBFactory.openSpatialDataBase(DB_NAME))) {
             try (PreparedStatement ps = con.prepareStatement("MERGE INTO features VALUES (?, ?, ?, ?)")) {
                 ps.setString(1, co.getGmlId().toString());
-                String bbox = BoundingBox.of(co.getHighestLodGeometry().getPolygons()).to2DWkt();
+                String bbox = BoundingBox.of(co).to2DWkt();
                 ps.setString(2, bbox);
                 if (logger.isDebugEnabled()) {
                     logger.debug("Attempting to serialize city object {} ", co);

CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/datastructure/BoundingBox.java

@@ -20,6 +20,7 @@ package de.hft.stuttgart.citydoctor2.datastructure;
 
 import de.hft.stuttgart.citydoctor2.math.Vector3d;
 import de.hft.stuttgart.citydoctor2.utils.BoundingBoxCalculator;
+import de.hft.stuttgart.citydoctor2.utils.visitors.MinMaxExtentVisitor;
 
 import java.util.Collection;
 import java.util.List;
@@ -47,6 +48,12 @@ public class BoundingBox {
         return BoundingBoxCalculator.calculateBoundingBoxFromPoints(points);
     }
 
+    public static BoundingBox of(CityObject co) {
+        MinMaxExtentVisitor mima = new MinMaxExtentVisitor();
+        co.accept(mima);
+        return BoundingBox.of(mima.getMinMaxExtent());
+    }
+
     /**
      * Creates an axis aligned bounding box of the whole model.
      *