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Indices are stored as mcIdType type instead of int to support switch to 64bits indexing
[tools/medcoupling.git] / src / MEDCoupling_Swig / MEDCouplingRemapperTest.py
index 716217461f457b2d1eeddd4cc7af8c5e34d24f8a..58054d5192bf4d97490c27f447c95b37b7042a08 100644 (file)
@@ -1,5 +1,5 @@
 #  -*- coding: iso-8859-1 -*-
-# Copyright (C) 2007-2016  CEA/DEN, EDF R&D
+# Copyright (C) 2007-2019  CEA/DEN, EDF R&D
 #
 # This library is free software; you can redistribute it and/or
 # modify it under the terms of the GNU Lesser General Public
@@ -30,13 +30,13 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         remapper=MEDCouplingRemapper()
         remapper.setPrecision(1e-12);
         remapper.setIntersectionType(Triangulation);
-        self.failUnless(remapper.prepare(sourceMesh,targetMesh,"P0P0")==1);
+        self.assertTrue(remapper.prepare(sourceMesh,targetMesh,"P0P0")==1);
         srcField=MEDCouplingFieldDouble.New(ON_CELLS);
         srcField.setNature(IntensiveMaximum);
         srcField.setMesh(sourceMesh);
         array=DataArrayDouble.New();
         ptr=sourceMesh.getNumberOfCells()*[None]
-        for i in xrange(sourceMesh.getNumberOfCells()):
+        for i in range(sourceMesh.getNumberOfCells()):
             ptr[i]=float(i+7)
             pass
         array.setValues(ptr,sourceMesh.getNumberOfCells(),1);
@@ -52,10 +52,10 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         self.assertEqual(c,10)
         values=trgfield.getArray().getValues();
         valuesExpected=[7.5 ,7. ,7.,8.,7.5];
-        for i in xrange(targetMesh.getNumberOfCells()):
-            self.failUnless(abs(values[i]-valuesExpected[i])<1e-12);
+        for i in range(targetMesh.getNumberOfCells()):
+            self.assertTrue(abs(values[i]-valuesExpected[i])<1e-12);
             pass
-        self.failUnless(1==trgfield.getArray().getNumberOfComponents());
+        self.assertTrue(1==trgfield.getArray().getNumberOfComponents());
         pass
 
     def testPrepareEx1(self):
@@ -75,7 +75,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         srcField.setMesh(sourceMesh);
         array=DataArrayDouble.New();
         ptr=sourceMesh.getNumberOfCells()*[None]
-        for i in xrange(sourceMesh.getNumberOfCells()):
+        for i in range(sourceMesh.getNumberOfCells()):
             ptr[i]=float(i+7);
             pass
         array.setValues(ptr,sourceMesh.getNumberOfCells(),1);
@@ -85,7 +85,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         valuesExpected=[7.75, 7.0625, 4.220173,8.0]
         self.assertEqual(4,trgfield.getArray().getNumberOfTuples());
         self.assertEqual(1,trgfield.getArray().getNumberOfComponents());
-        for i0 in xrange(4):
+        for i0 in range(4):
             self.assertAlmostEqual(valuesExpected[i0],values[i0],12);
             pass
         pass
@@ -107,7 +107,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         srcField.setMesh(sourceMesh);
         array=DataArrayDouble.New();
         ptr=sourceMesh.getNumberOfCells()*[None]
-        for i in xrange(sourceMesh.getNumberOfCells()):
+        for i in range(sourceMesh.getNumberOfCells()):
             ptr[i]=float(i+7);
             pass
         array.setValues(ptr,sourceMesh.getNumberOfCells(),1);
@@ -117,7 +117,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         trgfield.setMesh(targetMesh);
         array=DataArrayDouble.New();
         ptr=targetMesh.getNumberOfCells()*[None]
-        for i in xrange(targetMesh.getNumberOfCells()):
+        for i in range(targetMesh.getNumberOfCells()):
             ptr[i]=4.220173;
             pass
         array.setValues(ptr,targetMesh.getNumberOfCells(),1);
@@ -127,7 +127,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         valuesExpected=[7.75, 7.0625, 4.220173,8.0]
         self.assertEqual(4,trgfield.getArray().getNumberOfTuples());
         self.assertEqual(1,trgfield.getArray().getNumberOfComponents());
-        for i0 in xrange(4):
+        for i0 in range(4):
             self.assertAlmostEqual(valuesExpected[i0],values[i0],12);
             pass
         pass
@@ -308,7 +308,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         rem2=MEDCouplingRemapper() ; rem2.setSplittingPolicy(PLANAR_FACE_5) ; rem2.prepare(src1,trg,"P0P0")
         mat1=rem1.getCrudeMatrix() ; mat2=rem2.getCrudeMatrix()
         self.assertEqual(1,len(mat1)) ; self.assertEqual(1,len(mat2))
-        self.assertEqual(mat1[0].keys(),mat2[0].keys()) ; self.assertEqual([0,1],mat1[0].keys())
+        self.assertEqual(list(mat1[0].keys()),list(mat2[0].keys())) ; self.assertEqual([0,1],list(mat1[0].keys()))
         self.assertAlmostEqual(1.25884108122e-06,mat1[0][0],16) ; self.assertAlmostEqual(1.25884108122e-06,mat2[0][0],16)
         self.assertAlmostEqual(1.25884086663e-06,mat1[0][1],16) ; self.assertAlmostEqual(1.25884086663e-06,mat2[0][1],16)
         #
@@ -570,7 +570,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         self.assertEqual(aRemapper.prepare(s,t,'P1P1'),1)
         m=aRemapper.getCrudeMatrix()
         self.assertEqual(len(m),28)
-        for i in xrange(28):
+        for i in range(28):
             if i not in [5,6]:
                 self.assertEqual(len(m[i]),0)
                 pass
@@ -727,7 +727,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         rem=MEDCouplingRemapper()
         rem.prepare(src,trg,"P0P0")
         # Internal crude sparse matrix computed. Let's manipulate it using CSR matrix in scipy.
-        for i in xrange(10):
+        for i in range(10):
             m=rem.getCrudeCSRMatrix()
             pass
         m2=rem.getCrudeCSRMatrix()
@@ -776,7 +776,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         a.allocateCells()
         conna=[0,1,3,2,1,4,5,3,4,6,7,5,6,8,9,7,8,10,11,9,10,12,13,11,12,14,15,13,14,16,17,15,16,18,19,17,18,20,21,19,20,22,23,21,22,24,25,23,24,26,27,25]
         a.setCoords(DataArrayDouble([1.54,0,-0.01,1.54,0.02,-0.01,1.54,0,0.01,1.54,0.02,0.01,1.54,0.04,-0.01,1.54,0.04,0.01,1.54,0.06,-0.01,1.54,0.06,0.01,1.54,0.08,-0.01,1.54,0.08,0.01,1.54,0.1,-0.01,1.54,0.1,0.01,1.54,0.12,-0.01,1.54,0.12,0.01,1.54,0.14,-0.01,1.54,0.14,0.01,1.54,0.16,-0.01,1.54,0.16,0.01,1.54,0.18,-0.01,1.54,0.18,0.01,1.54,0.2,-0.01,1.54,0.2,0.01,1.54,0.22,-0.01,1.54,0.22,0.01,1.54,0.24,-0.01,1.54,0.24,0.01,1.54,0.26,-0.01,1.54,0.26,0.01],28,3))
-        for i in xrange(13):
+        for i in range(13):
             a.insertNextCell(NORM_QUAD4,conna[4*i:4*(i+1)])
             pass
         a.finishInsertingCells() ; a.simplexize(0)
@@ -784,7 +784,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         connb=[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,0,2,39,3,5,40,6,8,41,9,11,42,12,14,43,15,17,44,18,20,45,21,23,46,24,26,47,27,29,48,30,32,49,33,35,50,36,38,51,52,2,39,53,5,40,54,8,41,55,11,42,56,14,43,57,17,44,58,20,45,59,23,46,60,26,47,61,29,48,62,32,49,63,35,50,64,38,51,52,2,65,53,5,66,54,8,67,55,11,68,56,14,69,57,17,70,58,20,71,59,23,72,60,26,73,61,29,74,62,32,75,63,35,76,64,38,77,53,2,65,54,5,66,55,8,67,56,11,68,57,14,69,58,17,70,59,20,71,60,23,72,61,26,73,62,29,74,63,32,75,64,35,76,78,38,77,53,2,40,54,5,41,55,8,42,56,11,43,57,14,44,58,17,45,59,20,46,60,23,47,61,26,48,62,29,49,63,32,50,64,35,51,78,38,79,3,2,40,6,5,41,9,8,42,12,11,43,15,14,44,18,17,45,21,20,46,24,23,47,27,26,48,30,29,49,33,32,50,36,35,51,80,38,79,3,2,1,6,5,4,9,8,7,12,11,10,15,14,13,18,17,16,21,20,19,24,23,22,27,26,25,30,29,28,33,32,31,36,35,34,80,38,37]
         b=MEDCouplingUMesh("b",2)
         b.allocateCells()
-        for i in xrange(104):
+        for i in range(104):
             b.insertNextCell(NORM_TRI3,connb[3*i:3*(i+1)])
             pass
         b.setCoords(DataArrayDouble([1.54,0,-0.01,1.54,0.01,-0.01,1.54,0.01,0,1.54,0.02,-0.01,1.54,0.03,-0.01,1.54,0.03,0,1.54,0.04,-0.01,1.54,0.05,-0.01,1.54,0.05,0,1.54,0.06,-0.01,1.54,0.07,-0.01,1.54,0.07,0,1.54,0.08,-0.01,1.54,0.09,-0.01,1.54,0.09,0,1.54,0.1,-0.01,1.54,0.11,-0.01,1.54,0.11,0,1.54,0.12,-0.01,1.54,0.13,-0.01,1.54,0.13,0,1.54,0.14,-0.01,1.54,0.15,-0.01,1.54,0.15,0,1.54,0.16,-0.01,1.54,0.17,-0.01,1.54,0.17,0,1.54,0.18,-0.01,1.54,0.19,-0.01,1.54,0.19,0,1.54,0.2,-0.01,1.54,0.21,-0.01,1.54,0.21,0,1.54,0.22,-0.01,1.54,0.23,-0.01,1.54,0.23,0,1.54,0.24,-0.01,1.54,0.25,-0.01,1.54,0.25,0,1.54,0,0,1.54,0.02,0,1.54,0.04,0,1.54,0.06,0,1.54,0.08,0,1.54,0.1,0,1.54,0.12,0,1.54,0.14,0,1.54,0.16,0,1.54,0.18,0,1.54,0.2,0,1.54,0.22,0,1.54,0.24,0,1.54,0,0.01,1.54,0.02,0.01,1.54,0.04,0.01,1.54,0.06,0.01,1.54,0.08,0.01,1.54,0.1,0.01,1.54,0.12,0.01,1.54,0.14,0.01,1.54,0.16,0.01,1.54,0.18,0.01,1.54,0.2,0.01,1.54,0.22,0.01,1.54,0.24,0.01,1.54,0.01,0.01,1.54,0.03,0.01,1.54,0.05,0.01,1.54,0.07,0.01,1.54,0.09,0.01,1.54,0.11,0.01,1.54,0.13,0.01,1.54,0.15,0.01,1.54,0.17,0.01,1.54,0.19,0.01,1.54,0.21,0.01,1.54,0.23,0.01,1.54,0.25,0.01,1.54,0.26,0.01,1.54,0.26,0,1.54,0.26,-0.01],81,3))
@@ -806,8 +806,8 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         vals*=1e-5
         eps0=DataArrayDouble(m0.data)-vals ; eps0.abs()
         self.assertTrue(eps0.findIdsInRange(1e-17,1e300).empty())
-        self.assertTrue(DataArrayInt(m0.indices).isEqual(DataArrayInt([0,1,3,1,4,5,4,6,7,6,8,9,8,10,11,10,12,13,12,14,15,14,16,17,16,18,19,18,20,21,20,22,23,22,24,25,24,26,27,0,2,3,1,3,5,4,5,7,6,7,9,8,9,11,10,11,13,12,13,15,14,15,17,16,17,19,18,19,21,20,21,23,22,23,25,24,25,27,0,2,3,1,3,5,4,5,7,6,7,9,8,9,11,10,11,13,12,13,15,14,15,17,16,17,19,18,19,21,20,21,23,22,23,25,24,25,27,0,2,3,1,3,5,4,5,7,6,7,9,8,9,11,10,11,13,12,13,15,14,15,17,16,17,19,18,19,21,20,21,23,22,23,25,24,25,27,0,2,3,1,3,5,4,5,7,6,7,9,8,9,11,10,11,13,12,13,15,14,15,17,16,17,19,18,19,21,20,21,23,22,23,25,24,25,27,0,1,3,1,4,5,4,6,7,6,8,9,8,10,11,10,12,13,12,14,15,14,16,17,16,18,19,18,20,21,20,22,23,22,24,25,24,26,27,0,1,3,1,4,5,4,6,7,6,8,9,8,10,11,10,12,13,12,14,15,14,16,17,16,18,19,18,20,21,20,22,23,22,24,25,24,26,27,0,1,3,1,4,5,4,6,7,6,8,9,8,10,11,10,12,13,12,14,15,14,16,17,16,18,19,18,20,21,20,22,23,22,24,25,24,26,27])))
-        self.assertTrue(DataArrayInt(m0.indptr).isEqual(DataArrayInt([0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99,102,105,108,111,114,117,120,123,126,129,132,135,138,141,144,147,150,153,156,159,162,165,168,171,174,177,180,183,186,189,192,195,198,201,204,207,210,213,216,219,222,225,228,231,234,237,240,243,246,249,252,255,258,261,264,267,270,273,276,279,282,285,288,291,294,297,300,303,306,309,312])))
+        self.assertTrue(DataArrayInt32(m0.indices).isEqual(DataArrayInt32([0,1,3,1,4,5,4,6,7,6,8,9,8,10,11,10,12,13,12,14,15,14,16,17,16,18,19,18,20,21,20,22,23,22,24,25,24,26,27,0,2,3,1,3,5,4,5,7,6,7,9,8,9,11,10,11,13,12,13,15,14,15,17,16,17,19,18,19,21,20,21,23,22,23,25,24,25,27,0,2,3,1,3,5,4,5,7,6,7,9,8,9,11,10,11,13,12,13,15,14,15,17,16,17,19,18,19,21,20,21,23,22,23,25,24,25,27,0,2,3,1,3,5,4,5,7,6,7,9,8,9,11,10,11,13,12,13,15,14,15,17,16,17,19,18,19,21,20,21,23,22,23,25,24,25,27,0,2,3,1,3,5,4,5,7,6,7,9,8,9,11,10,11,13,12,13,15,14,15,17,16,17,19,18,19,21,20,21,23,22,23,25,24,25,27,0,1,3,1,4,5,4,6,7,6,8,9,8,10,11,10,12,13,12,14,15,14,16,17,16,18,19,18,20,21,20,22,23,22,24,25,24,26,27,0,1,3,1,4,5,4,6,7,6,8,9,8,10,11,10,12,13,12,14,15,14,16,17,16,18,19,18,20,21,20,22,23,22,24,25,24,26,27,0,1,3,1,4,5,4,6,7,6,8,9,8,10,11,10,12,13,12,14,15,14,16,17,16,18,19,18,20,21,20,22,23,22,24,25,24,26,27])))
+        self.assertTrue(DataArrayInt32(m0.indptr).isEqual(DataArrayInt32([0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99,102,105,108,111,114,117,120,123,126,129,132,135,138,141,144,147,150,153,156,159,162,165,168,171,174,177,180,183,186,189,192,195,198,201,204,207,210,213,216,219,222,225,228,231,234,237,240,243,246,249,252,255,258,261,264,267,270,273,276,279,282,285,288,291,294,297,300,303,306,309,312])))
         #
         rem2=MEDCouplingRemapper() ; rem2.setIntersectionType(Barycentric)
         rem2.prepare(b,a,"P0P1")
@@ -839,7 +839,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         rem.setMinDotBtwPlane3DSurfIntersect(0.99)# this line is important it is to tell to remapper to select only cells with very close orientation
         rem.prepare(skinAndNonConformCells,skinAndNonConformCells,"P0P0")
         mat=rem.getCrudeCSRMatrix()
-        indptr=DataArrayInt(mat.indptr)
+        indptr=DataArrayInt32(mat.indptr) #not depend on MEDCouplingUse64BitIDs()
         indptr2=indptr.deltaShiftIndex()
         cellIdsOfNonConformCells=indptr2.findIdsNotEqual(1)
         cellIdsOfSkin=indptr2.findIdsEqual(1)
@@ -860,7 +860,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         source=MEDCoupling1SGTUMesh("SourcePrimaire",NORM_SEG2)
         source.setCoords(sourceCoo)
         source.allocateCells()
-        for i in xrange(len(sourceCoo)-1):
+        for i in range(len(sourceCoo) - 1):
             source.insertNextCell([i,i+1])
             pass
         source=source.buildUnstructured()
@@ -998,8 +998,10 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         self.assertEqual(rem.getCrudeMatrix(),[{0: 1.0}, {1: 1.0}])
         rem2=MEDCouplingRemapper()
         rem2.setIntersectionType(PointLocator)
-        rem2.prepare(mt,ms,"P0P0") # reverse mt<->ms
-        self.assertEqual(rem2.getCrudeMatrix(),[{0: 1.0}, {1: 1.0}])
+        ##
+        # 2D to 3D with point locator does not make sense:
+        ##
+        self.assertRaises(InterpKernelException, rem2.prepare,mt,ms,"P0P0")
         pass
 
     def test2D1Dand1D2DPointLocator1(self):
@@ -1107,9 +1109,202 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         self.checkMatrix(rem2.getCrudeMatrix(),[{0:0.125,1:0.25}],src.getNumberOfCells(),1e-12)
         pass
 
+    def testP0P0WithHEXGP12(self):
+        """ Test that HEXGP12 are correctly remapped (elements with polygonal faces were not properly handled) """
+        # From Astrid, two disjoint hexagonal prisms:
+        coo1 = [-4.991193077144312, 8.644999999999998, 0.0, -9.982386154288623, 6.112246755425186e-16, 0.0, -4.991193077144315, -8.644999999999998, 0.0, 4.991193077144309, -8.645000000000005, 0.0, 9.982386154288626, 1.1651321638577316e-15, 0.0, 4.991193077144314, 8.645, 0.0, -4.991193077144312, 8.644999999999998, 7.561799999999991, -9.982386154288623, 6.112246755425186e-16, 7.561799999999991, -4.991193077144315, -8.644999999999998, 7.561799999999991, 4.991193077144309, -8.645000000000005, 7.561799999999991, 9.982386154288626, 1.1651321638577316e-15, 7.561799999999991, 4.991193077144314, 8.645, 7.561799999999991]
+        coo2 = [-4.991193077144313, -8.645, 0.0, -9.982386154288626, -1.3992140779350848e-15, 0.0, -19.964772308577256, 0.0, 0.0, -24.95596538572157, -8.644999999999998, 0.0, -19.96477230857726, -17.289999999999996, 0.0, -9.982386154288626, -17.289999999999996, 0.0, -4.991193077144313, -8.645, 5.041200000000004, -9.982386154288626, -1.3992140779350848e-15, 5.041200000000004, -19.964772308577256, 0.0, 5.041200000000004, -24.95596538572157, -8.644999999999998, 5.041200000000004, -19.96477230857726, -17.289999999999996, 5.041200000000004, -9.982386154288626, -17.289999999999996, 5.041200000000004]
+        conn1 = [31, 0, 5, 4, 3, 2, 1, -1, 11, 6, 7, 8, 9, 10, -1, 1, 7, 6, 0, -1, 2, 8, 7, 1, -1, 3, 9, 8, 2, -1, 4, 10, 9, 3, -1, 5, 11, 10, 4, -1, 0, 6, 11, 5]
+        cI1 = [0, 44]
+        conn2 = [31, 0, 5, 4, 3, 2, 1, -1, 6, 7, 8, 9, 10, 11, -1, 0, 1, 7, 6, -1, 1, 2, 8, 7, -1, 2, 3, 9, 8, -1, 3, 4, 10, 9, -1, 4, 5, 11, 10, -1, 5, 0, 6, 11]
+        cI2 = [0, 44]
+        mTgt = MEDCouplingUMesh("target", 3)
+        mSrc = MEDCouplingUMesh("src", 3)
+        mTgt.setCoords(DataArrayDouble(coo1, len(coo1) // 3, 3))
+        mSrc.setCoords(DataArrayDouble(coo2, len(coo2) // 3, 3))
+        mTgt.setConnectivity(DataArrayInt(conn1), DataArrayInt(cI1))
+        mSrc.setConnectivity(DataArrayInt(conn2), DataArrayInt(cI2))
+
+        # Recognize the HEXGP12:
+        mTgt.unPolyze()
+        mSrc.unPolyze()
+
+        rmp = MEDCouplingRemapper()
+        rmp.setIntersectionType(Triangulation)
+        rmp.prepare(mSrc, mTgt, "P0P0")
+        mat = rmp.getCrudeMatrix()
+        self.assertEqual(len(mat[0]), 0)
+        self.assertEqual(len(mat), 1)
+        pass
+
+    def testP0P0KillerTet(self):
+        """ The killer tetrahedron detected by LMEC!"""
+        mesh = MEDCouplingUMesh('SupportOf_ECHIA1_Tin', 3)
+#         # was OK:
+#         coo = DataArrayDouble([(-4.50135,1.95352,4.59608),(-4.50409,1.86642,4.54551), (-4.55175,1.92167,4.64844),(-4.58813,1.94795,4.5283)])
+        # was KO:
+        coo = DataArrayDouble([(-4.501352938826142847,1.953517433537110159,4.596082552008083688),(-4.504092113061189728,1.866415526007169978,4.545507396150389567),(-4.551750368181751050,1.921669328035479962,4.648439577911889664),(-4.588131417812300050,1.947948377683889953,4.528298931319220344)])
+        mesh.setCoords(coo)
+        c = DataArrayInt([14, 2, 0, 3, 1]); cI = DataArrayInt([0, 5])
+        mesh.setConnectivity(c, cI)
+        mesh_src, mesh_tgt = mesh.deepCopy(), mesh.deepCopy()
+        field_src = mesh_src.fillFromAnalytic(ON_CELLS, 1, "1")
+        field_src.setNature(IntensiveMaximum)
+        rmp = MEDCouplingRemapper()
+        rmp.setIntersectionType(Triangulation)
+        rmp.prepare(mesh_src, mesh_tgt, "P0P0")
+        self.assertEqual(1, len(rmp.getCrudeMatrix()))
+        self.assertEqual(1, len(rmp.getCrudeMatrix()[0]))
+        pass
+
+    @unittest.skipUnless(MEDCouplingHasNumPyBindings() and MEDCouplingHasSciPyBindings(),"requires numpy AND scipy AND C++11")
+    def testP1P1PL3DSpaceFrom1DTo0D(self):
+        from scipy.sparse import csr_matrix
+        from numpy import array
+
+        def generateTrg(eps):
+            trgArr=DataArrayDouble([(0.5,0.5,0.5),(0.2,0.2,0.2),(0.9,0.9,0.9),(0.7+eps*sqrt(3),0.7-eps*sqrt(3),0.7)])
+            trg=MEDCouplingUMesh("trg",0) ; trg.setCoords(trgArr)
+            trg.allocateCells()
+            RenumTrg=[2,3,0,1]
+            for rt in RenumTrg:
+                trg.insertNextCell(NORM_POINT1,[rt])
+            return trg
+
+        srcArr=DataArrayDouble([(0.,0.,1.),(0.,0.,0.),(1.,1.,1.)])
+        src=MEDCouplingUMesh("src",1) ; src.setCoords(srcArr)
+        src.allocateCells()
+        src.insertNextCell(NORM_SEG2,[1,2])
+        #
+        trg=generateTrg(1e-7)# trg point 3 of trg cell 1 is NOT closer enough to source edge #1 -> not intercepted
+        #
+        rem=MEDCouplingRemapper()
+        rem.setIntersectionType(PointLocator)
+        self.assertEqual(rem.prepare(src,trg,"P1P1"),1)
+        mat=rem.getCrudeCSRMatrix()
+        row=array([2,2, 0,0, 1,1]) # here no ref to point 3 !
+        col=array([1,2, 1,2, 1,2])
+        data=array([0.1,0.9, 0.5,0.5, 0.8,0.2])
+        mExp=csr_matrix((data,(row,col)),shape=(4,3))
+        delta=abs(mExp-mat)
+        self.assertAlmostEqual(delta.sum(),0.,14)
+        #
+        trg=generateTrg(1e-14) # trg point 3 of trg cell 1 is closer enough to source edge #1 -> intercepted
+        rem=MEDCouplingRemapper()
+        rem.setIntersectionType(PointLocator)
+        self.assertEqual(rem.prepare(src,trg,"P1P1"),1)
+        mat=rem.getCrudeCSRMatrix()
+        row=array([2,2, 3,3, 0,0, 1,1]) # here ref to target point 3
+        col=array([1,2, 1,2, 1,2, 1,2])
+        data=array([0.1,0.9, 0.3,0.7, 0.5,0.5, 0.8,0.2])
+        mExp2=csr_matrix((data,(row,col)),shape=(4,3))
+        delta2=abs(mExp2-mat)
+        self.assertAlmostEqual(delta2.sum(),0.,14)
+        pass
+
+    def testSetMatrix1(self):
+        """ Remapper has now setCrudeMatrix method to reload matrix to skip prepare phase """
+        cooS=DataArrayDouble([1,1, 7,1, 7,2, 1,2],4,2)
+        cooT=DataArrayDouble([0,0, 3,0, 3,3, 0,3, 6,0, 12,0, 12,3, 6,3],8,2)
+        ms=MEDCouplingUMesh("source",2) ; ms.allocateCells(1) ; ms.insertNextCell(NORM_QUAD4,[0,1,2,3]) ; ms.setCoords(cooS)
+        mt=MEDCouplingUMesh("target",2) ; mt.allocateCells(2) ; mt.insertNextCell(NORM_QUAD4,[0,1,2,3]) ; mt.insertNextCell(NORM_QUAD4,[4,5,6,7]) ; mt.setCoords(cooT)
+        rem=MEDCouplingRemapper()
+        self.assertEqual(rem.prepare(ms,mt,"P0P0"),1) # [{0: 2.0}, {0: 1.0}]
+        fs=MEDCouplingFieldDouble(ON_CELLS)
+        fs.setMesh(ms)
+        fs.setArray(DataArrayDouble([10]))
+        fs.checkConsistencyLight()
+        #
+        fs.setNature(ExtensiveConservation)
+        self.assertTrue(rem.transferField(fs,1e300).getArray().isEqual(DataArrayDouble([20./3,10./3.]),1e-12))# sum is equal to 10. First value is twice than second value
+        #
+        fs.setNature(ExtensiveMaximum)
+        self.assertTrue(rem.transferField(fs,1e300).getArray().isEqual(DataArrayDouble([20./6.,10./6.]),1e-12))#sum is equal to 5 (10/2. because only half part on input cell is intercepted by the target cells). First value is twice than second value
+        #
+        fs.setNature(IntensiveConservation)
+        self.assertTrue(rem.transferField(fs,1e300).getArray().isEqual(DataArrayDouble([2./9.*10.,1./18.*10.]),1e-12))#
+        #
+        fs.setNature(IntensiveMaximum)
+        self.assertTrue(rem.transferField(fs,1e300).getArray().isEqual(DataArrayDouble([10.,10.]),1e-12))#
+        ####
+        rem2=MEDCouplingRemapper()
+        rem2.setCrudeMatrix(ms,mt,"P0P0",rem.getCrudeMatrix())
+        fs.setNature(ExtensiveConservation)
+        self.assertTrue(rem2.transferField(fs,1e300).getArray().isEqual(DataArrayDouble([20./3,10./3.]),1e-12))
+        #
+        fs.setNature(ExtensiveMaximum)
+        self.assertTrue(rem2.transferField(fs,1e300).getArray().isEqual(DataArrayDouble([20./6.,10./6.]),1e-12))
+        #
+        fs.setNature(IntensiveConservation)
+        self.assertTrue(rem2.transferField(fs,1e300).getArray().isEqual(DataArrayDouble([2./9.*10.,1./18.*10.]),1e-12))
+        #
+        fs.setNature(IntensiveMaximum)
+        self.assertTrue(rem2.transferField(fs,1e300).getArray().isEqual(DataArrayDouble([10.,10.]),1e-12))
+        #
+        srcFt=MEDCouplingFieldTemplate.New(ON_CELLS);
+        trgFt=MEDCouplingFieldTemplate.New(ON_CELLS);
+        srcFt.setMesh(ms);
+        trgFt.setMesh(mt);
+        rem3=MEDCouplingRemapper()
+        rem3.setCrudeMatrixEx(srcFt,trgFt,rem.getCrudeMatrix())
+        fs.setNature(ExtensiveConservation)
+        self.assertTrue(rem3.transferField(fs,1e300).getArray().isEqual(DataArrayDouble([20./3,10./3.]),1e-12))
+        pass
+
+    @unittest.skipUnless(MEDCouplingHasNumPyBindings() and MEDCouplingHasSciPyBindings(),"requires numpy AND scipy")
+    def testSetMatrix2(self):
+        """ Remapper has now setCrudeMatrix method to reload matrix to skip prepare phase. Same as testSetMatrix1 but with CSR scipy matrix """
+        arrx_s=DataArrayDouble(6) ; arrx_s.iota()
+        arry_s=DataArrayDouble(6) ; arry_s.iota()
+        ms=MEDCouplingCMesh() ; ms.setCoords(arrx_s,arry_s)
+        ms=ms.buildUnstructured()
+        #
+        arrx_t=DataArrayDouble([2.5,4.5,5.5])
+        arry_t=DataArrayDouble([2.5,3.5,5.5])
+        mt=MEDCouplingCMesh() ; mt.setCoords(arrx_t,arry_t)
+        mt=mt.buildUnstructured()
+        #
+        rem=MEDCouplingRemapper()
+        self.assertEqual(rem.prepare(ms,mt,"P0P0"),1)
+        #
+        fs=MEDCouplingFieldDouble(ON_CELLS)
+        fs.setMesh(ms)
+        arr=DataArrayDouble(25) ; arr.iota()
+        fs.setArray(arr)
+        fs.checkConsistencyLight()
+        #
+        fs.setNature(ExtensiveConservation)
+        self.assertTrue(rem.transferField(fs,1e300).getArray().isEqual(DataArrayDouble([54.25,11.75,79.25,16.75]),1e-12))
+        mat=rem.getCrudeCSRMatrix()
+        rem2=MEDCouplingRemapper()
+        rem2.setCrudeMatrix(ms,mt,"P0P0",mat)
+        self.assertTrue(rem2.transferField(fs,1e300).getArray().isEqual(DataArrayDouble([54.25,11.75,79.25,16.75]),1e-12))
+        pass
+
+    def testSmallTetraCell(self):
+        """This test is a non regression test. When using tetra/tetra P0P0 interpolation on very small cells the
+        3x3 matrix in the TetraAffine contains very small values and so the determinant is small (cubic).
+        So the tetra was detected as flat. Now the infinite norm of matrix is considered to establish if matrix is inversible or not."""
+        coords = [(-0.019866666666666668, 0.02, 0.002), (-0.020000073463967143, 0.019999926535763005, 0.0018666666666666673), (-0.020000073463967143, 0.019999926535763005, 0.002), (-0.020000072974206463, 0.019866593202430387, 0.002)]
+        m=MEDCouplingUMesh("mesh",3)
+        m.allocateCells()
+        m.insertNextCell(NORM_TETRA4,[0,1,2,3])
+        m.setCoords(DataArrayDouble(coords))
+        rem=MEDCouplingRemapper()
+        rem.setPrecision(1e-12)
+        rem.prepare(m,m,"P0P0")
+        mat=rem.getCrudeMatrix()
+        self.assertTrue(len(mat)==1)
+        self.assertTrue(len(mat[0])==1)
+        self.assertTrue(list(mat[0].keys())==[0])
+        res=list(mat[0].values())[0]
+        ref=float(m.getMeasureField(True).getArray())
+        self.assertTrue(abs(res-ref)/ref<1e-12)
+        pass
+
     def checkMatrix(self,mat1,mat2,nbCols,eps):
         self.assertEqual(len(mat1),len(mat2))
-        for i in xrange(len(mat1)):
+        for i in range(len(mat1)):
             self.assertTrue(max(mat2[i].keys())<nbCols)
             self.assertTrue(max(mat1[i].keys())<nbCols)
             self.assertTrue(min(mat2[i].keys())>=0)
@@ -1163,7 +1358,7 @@ class MEDCouplingBasicsTest(unittest.TestCase):
         targetMesh=MEDCouplingUMesh.New();
         targetMesh.setMeshDimension(2);
         targetMesh.allocateCells(4);
-        for i in xrange(4):
+        for i in range(4):
             targetMesh.insertNextCell(NORM_QUAD4,4,targetConn[4*i:4*(i+1)])
             pass
         targetMesh.finishInsertingCells();