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@shBang #!/usr/bin/env python3
@*
ErrorCheck.tmpl
Created by Graham Dennis on 2007-08-26.
Copyright (c) 2007-2012, Graham Dennis
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*@
@extends xpdeint.Features._ErrorCheck
@def description: error check
@attr $featureName = 'ErrorCheck'
@def globals
@#
@super
@#
bool _half_step;
@for $momentGroup in $momentGroups
@set $momentGroupOutputField = $momentGroup.outputField
// Arrays for full- and half-step moment group results
real* _${momentGroupOutputField.name}_fullstep;
@end for
@#
@end def
@def topLevelSequenceBegin($dict)
@#
@# Loop over moment groups allocating half step array
@# and saving the pointer to the original array
@# Note that we allocate the half step array now and not
@# later when we actually need it so that if allocating it would
@# cause us to run out of virtual memory, we do that at the *start*
@# of the simulation, not half way through
@for $momentGroup in $momentGroups
@set $momentGroupOutputField = $momentGroup.outputField
_${momentGroupOutputField.name}_fullstep = _${momentGroup.processedVector.id};
// _${momentGroupOutputField.name}_halfstep has already been allocated
@end for
for (_half_step = false; ; _half_step = true)
{
if (!_half_step) {
_LOG(_SIMULATION_LOG_LEVEL, "Beginning full step integration ...\n");
@# Loop over the moment groups setting the output field to the fullstep fiel
@for $momentGroup in $momentGroups
@set $momentGroupOutputField = $momentGroup.outputField
_active_${momentGroup.processedVector.id} = _${momentGroupOutputField.name}_fullstep;
@end for
}
else {
_LOG(_SIMULATION_LOG_LEVEL, "Beginning half step integration ...\n");
@# Loop over the moment groups setting the output field to the already-allocated halfstep field
@for $momentGroup in $momentGroups
@set $momentGroupOutputField = $momentGroup.outputField
@for aliasName in momentGroup.processedVector.aliases
@if not aliasName==c"_${momentGroupOutputField.name}_halfstep"
_active_${momentGroup.processedVector.id} = $aliasName;
${momentGroup.processedVector.functions['initialise'].call()}
@end if
@end for
_active_${momentGroup.processedVector.id} = _${momentGroupOutputField.name}_halfstep;
@end for
}
@silent $dict['extraIndent'] += 2
@#
@end def
@def topLevelSequenceEnd($dict)
if (_half_step)
break;
}
@silent $dict['extraIndent'] -= 2
@end def
@*
This function returns a Cheetah template string suitable for passing to loopOverVectorsWithInnerContentTemplate
*@
@def writeOutFunctionImplementationBegin($dict)
@#
@set $momentGroup = dict['caller']
@set $dependentVariables = dict['dependentVariables']
@set $fieldName = $momentGroup.outputField.name
@#
@# So our job is to create 'error_' versions of all of the variables in the momentGroup's outputField.
@set $newVariableDict = {'vector': $momentGroup.processedVector,
'arrayName': c'_${fieldName}_fullstep',
'components': ['error_' + component for component in $momentGroup.processedVector.components],
}
@silent dependentVariables.append(newVariableDict)
@#
@# Now return the template that will be used to create the error vector
// Copy the error into the fullstep array
_${fieldName}_fullstep[\$index] = _${fieldName}_fullstep[\$index] - _${fieldName}_halfstep[\$index];
@#
@end def
@def createFixedStepVariable($dict)
// If we are doing half-step integration, divide the step size by 2
if (_half_step)
_step /= 2.0;
// Regardless, the step size for generated noise is the half-step
_noiseStep /= 2.0;
@end def
@def createToleranceVariable($dict)
// If we are doing half-step integration, divide the tolerance by 16
if (_half_step)
_tolerance /= 16.0;
@end def
@def integrateFixedStepInnerLoopBegin($dict)
@#
@set $integrator = dict['caller']
// If we are doing half-step integration, then we need to do each integrate step twice (but with half the step size)
for (int _error_check_loop_iter = (_half_step ? 2 : 1); _error_check_loop_iter > 0; _error_check_loop_iter--) {
@silent $dict['extraIndent'] += 2
@#
@end def
@def integrateFixedStepInnerLoopEnd($dict)
@#
}
@silent $dict['extraIndent'] -= 2
@#
@end def
@def writeOutFunctionImplementationBody($dict)
@set $momentGroup = dict['caller']
@set $processedVector = $momentGroup.processedVector
@set $outputFieldName = momentGroup.outputField.name
_active_${processedVector.id} = _${outputFieldName}_fullstep;
${processedVector.findMaximum('_max_step_error', basis = momentGroup.outputBasis)}@slurp
// Restore active pointer for processed vector
_active_${processedVector.id} = _${outputFieldName}_halfstep;
_LOG(_SIMULATION_LOG_LEVEL, "Maximum step error in moment group ${momentGroup.number+1} was %e\n", _max_step_error);
@end def
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