Add compactness function

dr-jts · dr-jts · commit 071d12be0107 · 2025-03-06T16:25:19.000-08:00
diff --git a/modules/app/src/main/java/org/locationtech/jtstest/function/MetricFunctions.java b/modules/app/src/main/java/org/locationtech/jtstest/function/MetricFunctions.java
@@ -84,4 +84,11 @@ public boolean isGeometryChanged() {
     
     return geom.getFactory().createLineString(pts);
   }
+  
+  public static double compactness(Geometry poly) {
+    double perimeter = poly.getLength();
+    double area = poly.getArea();
+    if (perimeter <= 0) return 0;
+    return Math.abs(area) * Math.PI * 4 / (perimeter * perimeter);
+  }
 }

Original file line number	Diff line number	Diff line change
`@@ -84,4 +84,11 @@ public boolean isGeometryChanged() {`
`84`	`84`
`85`	`85`	`return geom.getFactory().createLineString(pts);`
`86`	`86`	`}`
	`87`	`+`
	`88`	`+ public static double compactness(Geometry poly) {`
	`89`	`+ double perimeter = poly.getLength();`
	`90`	`+ double area = poly.getArea();`
	`91`	`+ if (perimeter <= 0) return 0;`
	`92`	`+ return Math.abs(area) * Math.PI * 4 / (perimeter * perimeter);`
	`93`	`+ }`
`87`	`94`	`}`