refactoring and other stuff

geometry.py

@@ -347,8 +347,13 @@ class geometry:
     A[:,0:2]=points[:,:2]
     y=np.asmatrix(y.ravel()).T
     A=np.asmatrix(A)
-    aa=(A.T*A).I*A.T*y
+    try:
+      aa=(A.T*A).I*A.T*y
+    except np.linalg.LinAlgError as e:
+      _log.warning(e)
+      return
     aa=aa.A.ravel()
+    print(f'plane={aa[0]}X+{aa[1]}Y+{aa[2]}')
     for p in points:
       print(f'{p}->{aa[0]*p[0]+aa[1]*p[1]+aa[2]}')
     self._fitPlane=aa