fixed a bug where the normal of a 45 degree slanted polygon would not...

fixed a bug where the normal of a 45 degree slanted polygon would not calculate the correct axis for projection in some cases

CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/math/Polygon2d.java

@@ -74,9 +74,9 @@ public class Polygon2d {
 		double ny = Math.abs(normal.getY());
 		double nz = Math.abs(normal.getZ());
 		int[] axis;
-		if (nx > ny && nx > nz) {
+		if (nx >= ny && nx >= nz) {
 			axis = new int[] { 1, 2 };
-		} else if (ny > nx && ny > nz) {
+		} else if (ny >= nx && ny >= nz) {
 			axis = new int[] { 0, 2 };
 		} else {
 			axis = new int[] { 0, 1 };