import medcoupling as mc
from MEDCouplingRemapper import MEDCouplingRemapper
# Target mesh
arr = mc.DataArrayDouble(11)
arr.iota(0)
trgMesh = mc.MEDCouplingCMesh()
trgMesh.setCoords(arr,arr)
trgMesh = trgMesh.buildUnstructured()
# Source mesh
arr = mc.DataArrayDouble(21)
arr.iota(0)
arr *= 0.5
srcMesh = mc.MEDCouplingCMesh()
srcMesh.setCoords(arr,arr)
srcMesh = srcMesh.buildUnstructured()
# Triangularize some cells in source
tmp = srcMesh[:20] # Extract a sub-part of srcMesh
tmp.simplexize(0)
srcMesh = mc.MEDCouplingUMesh.MergeUMeshes([tmp,srcMesh[20:]])
# Interpolate cells to cells
remap = MEDCouplingRemapper()
remap.prepare(srcMesh,trgMesh,"P0P0")
# Check matrix
myMatrix = remap.getCrudeMatrix()
print(myMatrix)
sumByRows = mc.DataArrayDouble(len(myMatrix))
for i,wIt in enumerate(sumByRows):
su = 0.
for it in myMatrix[i]:
su += myMatrix[i][it]
wIt[0] = su
print("Is interpolation well prepared?", sumByRows.isUniform(1.,1e-12))
# Source field construction
srcField = mc.MEDCouplingFieldDouble(mc.ON_CELLS, mc.ONE_TIME)
srcField.setMesh(srcMesh)
srcField.fillFromAnalytic(1,"7-sqrt((x-5.)*(x-5.)+(y-5.)*(y-5.))")
srcField.getArray().setInfoOnComponent(0, "powercell [W]")
# Transfer field
#remap.transferField(srcField, 1e300)
srcField.setNature(mc.IntensiveMaximum)
trgFieldCV = remap.transferField(srcField,1e300)
# IntensiveMaximum
integSource = srcField.integral(True)[0]
integTarget = trgFieldCV.integral(True)[0]
print("IntensiveMaximum -- integrals: %lf == %lf" % (integSource, integTarget))
accSource = srcField.getArray().accumulate()[0]
accTarget = trgFieldCV.getArray().accumulate()[0]
print("IntensiveMaximum -- sums: %lf != %lf" % (accSource, accTarget))
# ExtensiveConservation
srcField.setNature(mc.ExtensiveConservation)
trgFieldI = remap.transferField(srcField,1e300)
#
integSource = srcField.integral(True)[0]
integTarget = trgFieldI.integral(True)[0]
print("ExtensiveConservation -- integrals: %lf != %lf" % (integSource, integTarget))
accSource = srcField.getArray().accumulate()[0]
accTarget = trgFieldI.getArray().accumulate()[0]
print("ExtensiveConservation -- sums: %lf == %lf" % (accSource, accTarget))