fixing the difference error

Author: madhephaestus

src/main/java/eu/mihosoft/vrl/v3d/CSG.java

@@ -1159,7 +1159,9 @@ private CSG _unionNoOpt(CSG csg) {
 	 */
 	public CSG difference(List<CSG> csgs) {
 		if (CSGClient.isRunning()) {
-			ArrayList<CSG> go = new ArrayList<CSG>(csgs);
+			ArrayList<CSG> go = new ArrayList<CSG>();
+			go.add(this);
+			go.addAll(csgs);
 			try {
 				return CSGClient.getClient().difference(go).get(0);
 			} catch (Exception e) {

src/test/java/eu/mihosoft/vrl/v3d/ServerClientTest.java

@@ -53,13 +53,15 @@ public CSG prep(CSG incoming) {
 			b.getBounds();
 			CSG c = new Cube(10, 10, 10).toCSG();
 			c.getBounds();
+			CSG dif = new Cube(100, 100, 1).toCSG();
+			dif.getBounds();
 
 			int apoly1 = a.getPolygons().size();
 			int bpoly1 =b.getPolygons().size();
 
 			CSG u1 = a.union( b,c);
 			CSG i1 = c.intersect(b);
-			CSG d1 = a.difference(b);
+			CSG d1 = a.difference(b,dif);
 			CSG t1 = d1.clone().triangulate(true);
 			ArrayList<CSG> m1 = a.minkowskiHullShape(b);
 			CSG h1 = u1.hull();
@@ -77,7 +79,7 @@ public CSG prep(CSG incoming) {
 			CSG i0 = c.intersect(b);
 			if(testPoly(i1,i0))
 				fail();
-			CSG d = a.difference(b);
+			CSG d = a.difference(b,dif);
 			if(testPoly(d1,d))
 				fail("Difference Step fail , expected "+d1.getPolygons().size()+" got "+d.getPolygons().size());
 			CSG t = d.clone().triangulate(true);