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jan 2016-08-05 18:39:58 -07:00
parent 481613fe5d
commit 7bf7a3d80c
2 changed files with 27 additions and 18 deletions
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41
fdtd/boundary.py
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@ -121,15 +121,27 @@ def cpml(direction: int,
p0e, p1e = par(xe)
p0h, p1h = par(xh)
def create_table(name, xs, type='float'):
s = type + ''' {name}(int x) {{
switch (x) {{
'''.format(name=name)
for i, x in enumerate(xs):
s += ''' case {i}: return {x};
'''.format(i=i, x=x)
s += '''
}
}'''
return s
vals = {'r': r,
'u': uv[0],
'v': uv[1],
'np': np,
'th': thickness,
'p0e': ', '.join((str(x) for x in p0e)),
'p1e': ', '.join((str(x) for x in p1e)),
'p0h': ', '.join((str(x) for x in p0h)),
'p1h': ', '.join((str(x) for x in p1h)),
#'p0e': ', '.join((str(x) for x in p0e)),
#'p1e': ', '.join((str(x) for x in p1e)),
#'p0h': ', '.join((str(x) for x in p0h)),
#'p1h': ', '.join((str(x) for x in p1h)),
'se': '-+'[direction % 2],
'sh': '+-'[direction % 2]}
@ -149,24 +161,16 @@ if ( (s{r} - 1) > {r} && {r} > (s{r} - 1) - ({th} + 1) ) {{
raise Exception('Bad polarity (=0)')
code_e = """
// pml parameters:
const float p0[{th}] = {{ {p0e} }};
const float p1[{th}] = {{ {p1e} }};
Psi_{r}{np}_E{u}[ip] = p0[ir] * Psi_{r}{np}_E{u}[ip] + p1[ir] * (H{v}[i] - H{v}[i-di{r}]);
Psi_{r}{np}_E{v}[ip] = p0[ir] * Psi_{r}{np}_E{v}[ip] + p1[ir] * (H{u}[i] - H{u}[i-di{r}]);
Psi_{r}{np}_E{u}[ip] = p0e(ir) * Psi_{r}{np}_E{u}[ip] + p1e(ir) * (H{v}[i] - H{v}[i-di{r}]);
Psi_{r}{np}_E{v}[ip] = p0e(ir) * Psi_{r}{np}_E{v}[ip] + p1e(ir) * (H{u}[i] - H{u}[i-di{r}]);
E{u}[i] {se}= dt / eps{u}[i] * Psi_{r}{np}_E{u}[ip];
E{v}[i] {sh}= dt / eps{v}[i] * Psi_{r}{np}_E{v}[ip];
}}
"""
code_h = """
// pml parameters:
const float p0[{th}] = {{ {p0h} }};
const float p1[{th}] = {{ {p1h} }};
Psi_{r}{np}_H{u}[ip] = p0[ir] * Psi_{r}{np}_H{u}[ip] + p1[ir] * (E{v}[i+di{r}] - E{v}[i]);
Psi_{r}{np}_H{v}[ip] = p0[ir] * Psi_{r}{np}_H{v}[ip] + p1[ir] * (E{u}[i+di{r}] - E{u}[i]);
Psi_{r}{np}_H{u}[ip] = p0h(ir) * Psi_{r}{np}_H{u}[ip] + p1h(ir) * (E{v}[i+di{r}] - E{v}[i]);
Psi_{r}{np}_H{v}[ip] = p0h(ir) * Psi_{r}{np}_H{v}[ip] + p1h(ir) * (E{u}[i+di{r}] - E{u}[i]);
H{u}[i] {sh}= dt * Psi_{r}{np}_H{u}[ip];
H{v}[i] {se}= dt * Psi_{r}{np}_H{v}[ip];
@ -180,6 +184,11 @@ if ( (s{r} - 1) > {r} && {r} > (s{r} - 1) - ({th} + 1) ) {{
'Psi_{r}{np}_E{v}'.format(**vals)],
'psi_H': ['Psi_{r}{np}_H{u}'.format(**vals),
'Psi_{r}{np}_H{v}'.format(**vals)],
'tables': create_table('p0e', p0e) + \
create_table('p1e', p1e) + \
create_table('p0h', p0h) + \
create_table('p1h', p1h)
}
return pml_data

4
fdtd/simulation.py
View File

@ -174,8 +174,8 @@ class Simulation(object):
pml_E_args = ', '.join(E_args + H_args + dt_arg + eps_args + arglist_E)
pml_H_args = ', '.join(E_args + H_args + dt_arg + arglist_H)
pml_E = ElementwiseKernel(self.context, arguments=pml_E_args, operation=pml_E_source)
pml_H = ElementwiseKernel(self.context, arguments=pml_H_args, operation=pml_H_source)
pml_E = ElementwiseKernel(self.context, preamble=pml_data['tables'], arguments=pml_E_args, operation=pml_E_source)
pml_H = ElementwiseKernel(self.context, preamble=pml_data['tables'], arguments=pml_H_args, operation=pml_H_source)
self.cpml_E = lambda e: pml_E(*self.E, *self.H, self.dt, *self.eps, *psi_E, wait_for=e)
self.cpml_H = lambda e: pml_H(*self.E, *self.H, self.dt, *psi_H, wait_for=e)