Repair shadow, normal push + attractor mesh.

Normand Briere

2018-12-15 6ed65dcb597fb2153cef75bf1845978f1115658c

 BoundaryRep.java
..
..
@@ -4948,7 +4948,7 @@
4948
4948
             {
4949
4949
                 Vertex v = GetVertex(i);
4950
4950
                 
4951
-                if (v.norm.x == 0 && v.norm.y == 0 && v.norm.z == 0)
4951
+                if (v.norm == null || v.norm.x == 0 && v.norm.y == 0 && v.norm.z == 0)
4952
4952
                     continue;
4953
4953
 
4954
4954
                 from.set(v.x, v.y, v.z);