/[escript]/trunk/modellib/py_src/input.py
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Contents of /trunk/modellib/py_src/input.py

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Revision 820 - (show annotations)
Mon Aug 28 06:55:36 2006 UTC (13 years, 1 month ago) by gross
File MIME type: text/x-python
File size: 9895 byte(s)
make the modelframe test run
1 # $Id$
2
3 __copyright__=""" Copyright (c) 2006 by ACcESS MNRF
4 http://www.access.edu.au
5 Primary Business: Queensland, Australia"""
6 __license__="""Licensed under the Open Software License version 3.0
7 http://www.opensource.org/licenses/osl-3.0.php"""
8
9 from esys.escript import *
10 from esys.escript.modelframe import Model,ParameterSet
11 from math import log
12
13 class Sequencer(Model):
14 """
15 Runs through time until t_end is reached.
16
17 @ivar t_end: model is terminated when t_end is passed, default 1 (in).
18 @type t_end: C{float}
19 @ivar dt_max: maximum time step size, default L{Model.UNDEF_DT} (in)
20 @type dt_max: C{float}
21 @ivar t: current time stamp (in/out). By default it is initialized with zero.
22 @type t: C{float}
23
24 """
25 def __init__(self,debug=False):
26 """
27 """
28 super(Sequencer,self).__init__(debug=debug)
29 self.declareParameter(t=0.,
30 t_end=1.,
31 dt_max=Model.UNDEF_DT)
32
33 def doInitialization(self):
34 """
35 initialize time integration
36 """
37 self.__t_old = self.t
38
39 def doStepPreprocessing(self, dt):
40 self.t = self.__t_old+dt
41
42 def doStepPostprocessing(self, dt):
43 self.__t_old = self.t
44
45 def finalize(self):
46 """
47 returns true when L{t} has reached L{t_end}
48 """
49 return self.t >= self.t_end
50
51 def getSafeTimeStepSize(self, dt):
52 """
53 returns L{dt_max}
54 """
55 return self.dt_max
56
57 class GaussianProfile(ParameterSet):
58 """
59 Generates a Gaussian profile at center x_c, width width and height A
60 over a domain
61
62 @ivar domain: domain
63 @ivar x_c: center of the Gaussian profile (default [0.,0.,0.])
64 @ivar A: (in) height of the profile. A maybe a vector. (default 1.)
65 @ivar width: (in) width of the profile (default 0.1)
66 @ivar r: (in) radius of the circle (default = 0)
67
68 In the case that the spatial dimension is two, The third component of
69 x_c is dropped.
70 """
71 def __init__(self,debug=False):
72 ParameterSet.__init__(self,debug=debug)
73 self.declareParameter(domain=None,
74 x_c=numarray.zeros([3]),
75 A=1.,
76 width=0.1,
77 r=0)
78
79 def out(self):
80 """
81 Generate the Gaussian profile
82
83 Link against this method to get the output of this model.
84 """
85 x = self.domain.getX()
86 dim = self.domain.getDim()
87 l = length(x-self.x_c[:dim])
88 m = whereNegative(l-self.r)
89
90 return (m+(1.-m)*exp(-log(2.)*(l/self.width)**2))*self.A
91
92 class InterpolateOverBox(ParameterSet):
93 """
94 Returns values at each time. The values are defined through given values
95 at time node. For two dimensional domains back values are ignored.
96
97 @ivar domain: domain
98 @ivar value_left_bottom_front: (in) value at left,bottom,front corner
99 @ivar value_right_bottom_front: (in) value at right, bottom, front corner
100 @ivar value_left_top_front: (in) value at left,top,front corner
101 @ivar value_right_top_front: (in) value at right,top,front corner
102 @ivar value_left_bottom_back: (in) value at left,bottom,back corner
103 @ivar value_right_bottom_back: (in) value at right,bottom,back corner
104 @ivar value_left_top_back: (in) value at left,top,back corner
105 @ivar value_right_top_back: (in) value at right,top,back corner
106 """
107
108 def __init__(self, debug=False):
109 ParameterSet.__init__(self, debug=debug)
110 self.declareParameter(domain=None,
111 value_left_bottom_front=0.,
112 value_right_bottom_front=0.,
113 value_left_top_front=0.,
114 value_right_top_front=0.,
115 value_left_bottom_back=0.,
116 value_right_bottom_back=0.,
117 value_left_top_back=0.,
118 value_right_top_back=0.)
119
120
121 def out(self):
122 """
123 values at domain locations by bilinear interpolation of the given values.
124
125 Link against this method to get the output of this model.
126 """
127 x = self.domain.getX()
128 if self.domain.getDim() == 2:
129 x0,x1=x[0],x[1]
130 left_bottom_front0,right_top_back0=inf(x0),sup(x0)
131 left_bottom_front1,right_top_back1=inf(x1),sup(x1)
132 f_right = (x0 - left_bottom_front0)/(right_top_back0 -left_bottom_front0)
133 f_left = 1. - f_right
134 f_top = (x1 - left_bottom_front1)/(right_top_back1 - left_bottom_front1)
135 f_bottom = 1. - f_top
136 out = f_left * f_bottom * self.value_left_bottom_front \
137 + f_right * f_bottom * self.value_right_bottom_front \
138 + f_left * f_top * self.value_left_top_front \
139 + f_right * f_top * self.value_right_top_front
140 else:
141 x0,x1,x2=x[0],x[1],x[2]
142 left_bottom_front0,right_top_back0=inf(x0),sup(x0)
143 left_bottom_front1,right_top_back1=inf(x1),sup(x1)
144 left_bottom_front2,right_top_back2=inf(x2),sup(x2)
145 f_right = (x0 - left_bottom_front0)/(right_top_back0 - left_bottom_front0)
146 f_left = 1. - f_right
147 f_top = (x1 - left_bottom_front1)/(right_top_back1 - left_bottom_front1)
148 f_bottom = 1. - f_top
149 f_back = (x2 - left_bottom_front1)/(right_top_back2 - left_bottom_front2)
150 f_front = 1. - f_back
151 out = f_left * f_bottom * f_front * self.value_left_bottom_front\
152 + f_right * f_bottom * f_front * self.value_right_bottom_front\
153 + f_left * f_top * f_front * self.value_left_top_front\
154 + f_right * f_top * f_front * self.value_right_top_front\
155 + f_left * f_bottom * f_back * self.value_left_bottom_back\
156 + f_right * f_bottom * f_back * self.value_right_bottom_back\
157 + f_left * f_top * f_back * self.value_left_top_back\
158 + f_right * f_top * f_back * self.value_right_top_back
159 return out
160
161
162 class InterpolatedTimeProfile(ParameterSet):
163 """
164
165 Returns values at each time. The values are defined through given
166 values at time node.
167
168 value[i] defines the value at time nodes[i]. Between nodes linear
169 interpolation is used.
170
171 For time t<nodes[0], value[0] is used and for t>nodes[l], values[l]
172 is used where l=len(nodes)-1.
173
174 @ivar t: (in) current time
175 @ivar node: (in) list of time nodes
176 @ivar values: (in) list of values at time nodes
177 """
178
179 def __init__(self,debug=False):
180 ParameterSet.__init__(self,debug=debug)
181 self.declareParameter(t=0., \
182 nodes=[0.,1.],\
183 values=[1.,1.])
184 def out(self):
185 """
186 current value
187
188 Link against this method to get the output of this model.
189 """
190 l = len(self.nodes) - 1
191 t = self.t
192 if t <= self.nodes[0]:
193 return self.values[0]
194 else:
195 for i in range(1,l):
196 if t < self.nodes[i]:
197 m = (self.values[i-1] - self.values[i])/\
198 (self.nodes[i-1] - self.nodes[i])
199 return m*(t-self.nodes[i-1]) + self.values[i-1]
200 return self.values[l]
201
202 class LinearCombination(Model):
203 """
204 Returns a linear combination of the f0*v0+f1*v1+f2*v2+f3*v3+f4*v4
205
206 @ivar f0: numerical object or None, default=None (in)
207 @ivar v0: numerical object or None, default=None (in)
208 @ivar f1: numerical object or None, default=None (in)
209 @ivar v1: numerical object or None, default=None (in)
210 @ivar f2: numerical object or None, default=None (in)
211 @ivar v2: numerical object or None, default=None (in)
212 @ivar f3: numerical object or None, default=None (in)
213 @ivar v3: numerical object or None, default=None (in)
214 @ivar f4: numerical object or None, default=None (in)
215 @ivar v4: numerical object or None, default=None (in)
216 """
217 def __init__(self,debug=False):
218 Model.__init__(self,debug=debug)
219 self.declareParameter(f0=None, \
220 v0=None, \
221 f1=None, \
222 v1=None, \
223 f2=None, \
224 v2=None, \
225 f3=None, \
226 v3=None, \
227 f4=None, \
228 v4=None)
229
230 def out(self):
231 """
232 returns f0*v0+f1*v1+f2*v2+f3*v3+f4*v4.
233 Link against this method to get the output of this model.
234 """
235 if not self.f0 == None and not self.v0 == None:
236 fv0 = self.f0*self.v0
237 else:
238 fv0 = None
239
240 if not self.f1 == None and not self.v1 == None:
241 fv1 = self.f1*self.v1
242 else:
243 fv1 = None
244
245 if not self.f2 == None and not self.v2 == None:
246 fv2 = f2*v2
247 else:
248 fv2 = None
249
250 if not self.f3 == None and not self.v3 == None:
251 fv3 = self.f3*self.v3
252 else:
253 fv3 = None
254
255 if not self.f4 == None and not self.v4 == None:
256 fv4 = self.f4*self.v4
257 else:
258 fv4 = None
259
260 if fv0 == None:
261 out = 0.
262 else:
263 out = fv0
264 if not fv1 == None:
265 out += fv1
266 if not fv2 == None:
267 out += fv2
268 if not fv3 == None:
269 out += fv3
270 return out
271
272 # vim: expandtab shiftwidth=4:

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