| 1 | |
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| 2 | #MOVED from generic boundary conditions 27 Nov 2008 |
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| 3 | |
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| 4 | |
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| 5 | |
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| 6 | |
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| 7 | |
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| 8 | #THIS FAR (10/8/4) |
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| 9 | class Connective_boundary(Boundary): |
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| 10 | """Connective boundary returns values for the |
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| 11 | conserved quantities from a volume as defined by a connection table |
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| 12 | mapping between tuples of (volume id, face id) for volumes that |
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| 13 | have their boundaries connected. |
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| 14 | |
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| 15 | FIXME: Perhaps include possibility of mapping between |
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| 16 | different domains as well |
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| 17 | |
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| 18 | FIXME: In case of shallow water we may want to have a |
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| 19 | special version that casts this in terms of height rather than stage |
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| 20 | """ |
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| 21 | |
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| 22 | |
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| 23 | def __init__(self, table): |
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| 24 | from domain import Volume |
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| 25 | |
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| 26 | Boundary.__init__(self) |
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| 27 | |
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| 28 | self.connection_table = table |
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| 29 | self.Volume = Volume |
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| 30 | |
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| 31 | def __repr__(self): |
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| 32 | return 'Connective boundary' |
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| 33 | |
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| 34 | #FIXME: IF we ever need to get field_values from connected volume, |
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| 35 | #that method could be overridden here (using same idea as in |
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| 36 | #get_conserved_quantities |
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| 37 | #def get_field_values() |
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| 38 | |
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| 39 | def get_conserved_quantities(self, volume, face=0): |
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| 40 | |
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| 41 | id = volume.id |
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| 42 | if self.connection_table.has_key((id, face)): |
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| 43 | other_id, other_face = self.connection_table[(id, face)] |
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| 44 | |
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| 45 | other_volume = self.Volume.instances[other_id] |
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| 46 | cmd = 'q = other_volume.conserved_quantities_face%d' %face; |
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| 47 | exec(cmd) |
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| 48 | return q |
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| 49 | else: |
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| 50 | msg = 'Volume, face tuple ($d, %d) has not been mapped'\ |
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| 51 | %(id, face) |
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| 52 | raise msg |
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| 53 | |
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| 54 | |
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| 55 | |
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| 56 | |
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| 57 | |
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| 58 | #FIXME: Add a boundary with a general function of x,y, and t |
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| 59 | |
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| 60 | #FIXME: Add periodic boundaries e.g.: |
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| 61 | # Attempt at periodic conditions from advection_spik. Remember this |
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| 62 | # |
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| 63 | #first = 2*(N-1)*N |
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| 64 | #for i in range(1,2*N+1,2): |
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| 65 | # k = first + i-1# |
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| 66 | # |
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| 67 | # print i,k |
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| 68 | # |
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| 69 | # domain[i].faces[2].neighbour = domain[k].faces[1] |
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| 70 | # domain[k].faces[1].neighbour = domain[i].faces[2] |
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| 71 | |
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| 72 | |
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| 73 | |
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| 74 | class General_boundary(Boundary): |
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| 75 | """General boundary which can compute conserved quantities based on |
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| 76 | their previous value, conserved quantities of its neighbour and model time. |
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| 77 | |
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| 78 | Must specify initial conserved quantities, |
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| 79 | neighbour, |
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| 80 | domain to get access to model time |
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| 81 | a function f(q_old, neighbours_q, t) which must return |
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| 82 | new conserved quantities q as a function time |
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| 83 | |
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| 84 | FIXME: COMPLETE UNTESTED - JUST AN IDEA |
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| 85 | """ |
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| 86 | |
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| 87 | def __init__(self, neighbour=None, conserved_quantities=None, domain=None, f=None): |
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| 88 | Boundary.__init__(self, neighbour=neighbour, conserved_quantities=conserved_quantities) |
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| 89 | |
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| 90 | self.f = f |
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| 91 | self.domain = domain |
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| 92 | |
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| 93 | |
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| 94 | def get_conserved_quantities(self, volume=None, face=0): |
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| 95 | |
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| 96 | # FIXME (Ole): I think this should be get_time(), see ticket:306 |
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| 97 | return self.f(self.conserved_quantities, |
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| 98 | neighbour.conserved_quantities, |
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| 99 | self.domain.time) |
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| 100 | |
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| 101 | |
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| 102 | |
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| 103 | |
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