Fixing some issues in 3D Cartesian coordinates. Included 3D pusher.

Still there are issues linking a volume to an edge.

src/modules/moduleInject.f90

@@ -230,12 +230,15 @@ MODULE moduleInject
         !Random position in edge
         partInj(n)%r = randomEdge%randPos()
         !Volume associated to the edge:
-        IF (DOT_PRODUCT(self%n, randomEdge%normal) >= 0.D0) THEN
+        IF (ASSOCIATED(randomEdge%e1)) THEN
           partInj(n)%vol = randomEdge%e1%n
-        
-        ELSE
+
+        ELSEIF (ASSOCIATED(randomEdge%e2)) THEN
           partInj(n)%vol = randomEdge%e2%n
 
+        ELSE
+          PRINT *, "ERROR NO VOL ASSOCIATED TO EDGE"
+
         END IF
 
         partInj(n)%v = (/ self%v(1)%obj%randomVel(), &