Combine the solution with the right-hand side estimates of the Runge-Kutta stages. More...

Inheritance diagram for exahype2.api.rkfd4.actionsets.ComputeLinearCombination.ComputeLinearCombination:

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Collaboration diagram for exahype2.api.rkfd4.actionsets.ComputeLinearCombination.ComputeLinearCombination:

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Public Member Functions
	__init__ (self, solver, weights, output, guard)

	get_body_of_operation (self, operation_name)
	Return actual C++ code snippets to be inserted into C++ code.

	get_guard_of_operation (self, operation_name)
	Return the guard of an operation.

	get_action_set_name (self)
	You should replicate this function in each subclass, so you get meaningful action set names (otherwise, it will be AbstractRKFD4ActionSet0,1,2,...).

Public Member Functions inherited from exahype2.api.rkfd4.actionsets.AbstractRKFD4ActionSet.AbstractRKFD4ActionSet
	user_should_modify_template (self)
	Is the user allowed to modify the output.

	get_includes (self)
	The includes cover the kernels the numerical scheme generates (exahype2.api.rkfd4.CentralDifferencesWithRungeKutta), so all action sets can invoke them.

Public Member Functions inherited from peano4.api.solversteps.ActionSet.ActionSet
	get_constructor_body (self)
	Define a tailored constructor body.

	get_static_initialisations (self, full_qualified_classname)

	get_destructor_body (self)

	get_body_of_createGridControlEventsForNextTraversal (self)
	Return the grid control events that this action set wants to trigger.

	get_implementation_of_createGridControlEventsForNextTraversal (self)
	Return the C++ implementation of createGridControlEventsForNextTraversal()

	get_body_of_prepareTraversal (self)

	get_implementation_of_prepareTraversal (self)
	Return the C++ implementation of prepareTraversal()

	get_body_of_unprepareTraversal (self)

	get_implementation_of_unprepareTraversal (self)
	Return the C++ implementation of unprepareTraversal()

	get_implementation_of_operation (self, operation_name)
	Return the C++ implementation of an operation.

bool	may_run_in_background_task (self)
	May a task graph compiler move touchCellFirstTime() into a task.

	get_attributes (self)
	Return attributes as copied and pasted into the generated class.

Data Fields
	weights

	output

	guard

Data Fields inherited from peano4.api.solversteps.ActionSet.ActionSet
	descend_invocation_order

	parallel

Additional Inherited Members
Static Public Attributes inherited from peano4.api.solversteps.ActionSet.ActionSet
int	descend_invocation_order = 0

bool	parallel = False

str	OPERATION_BEGIN_TRAVERSAL = "beginTraversal"

str	OPERATION_END_TRAVERSAL = "endTraversal"

str	OPERATION_CREATE_PERSISTENT_VERTEX = "createPersistentVertex"

str	OPERATION_DESTROY_PERSISTENT_VERTEX = "destroyPersistentVertex"

str	OPERATION_CREATE_HANGING_VERTEX = "createHangingVertex"

str	OPERATION_DESTROY_HANGING_VERTEX = "destroyHangingVertex"

str	OPERATION_CREATE_PERSISTENT_FACE = "createPersistentFace"

str	OPERATION_DESTROY_PERSISTENT_FACE = "destroyPersistentFace"

str	OPERATION_CREATE_HANGING_FACE = "createHangingFace"

str	OPERATION_DESTROY_HANGING_FACE = "destroyHangingFace"

str	OPERATION_CREATE_CELL = "createCell"

str	OPERATION_DESTROY_CELL = "destroyCell"

str	OPERATION_TOUCH_VERTEX_FIRST_TIME = "touchVertexFirstTime"

str	OPERATION_TOUCH_VERTEX_LAST_TIME = "touchVertexLastTime"

str	OPERATION_TOUCH_FACE_FIRST_TIME = "touchFaceFirstTime"

str	OPERATION_TOUCH_FACE_LAST_TIME = "touchFaceLastTime"

str	OPERATION_TOUCH_CELL_FIRST_TIME = "touchCellFirstTime"

str	OPERATION_TOUCH_CELL_LAST_TIME = "touchCellLastTime"

Protected Attributes inherited from exahype2.api.rkfd4.actionsets.AbstractRKFD4ActionSet.AbstractRKFD4ActionSet
	_solver

Detailed Description

Combine the solution with the right-hand side estimates of the Runge-Kutta stages.

The action set computes

\( Q_{out} = Q^n + \\Delta t \\sum _j w_j K_j \)

per grid cell through the kernel of exahype2.api.rungekutta.LinearCombination, with \( Q^n \) being solver._patch and the \( K_j \) the estimates in solver._rhs_estimates. The weights are either a row of the Butcher tableau's weight matrix, which yields the input of a stage, or the final estimate weights, which yield the solution of the next time step. In the latter case, the output is solver._patch itself.

The auxiliary variables are copied from solver._patch.

Definition at line 9 of file ComputeLinearCombination.py.

Constructor & Destructor Documentation

◆ init()

exahype2.api.rkfd4.actionsets.ComputeLinearCombination.ComputeLinearCombination.__init__	(	self,
		solver,
		weights,
		output,
		guard
	)

Parameters

solver	exahype2.api.Solver Has to have an exahype2.api.rkfd4.CentralDifferencesWithRungeKutta as numerical scheme.
weights	[float] One weight per Runge-Kutta stage.
output	peano4.api.datamodel.Patch The cell data to write the outcome into, i.e. solver._stage_input or solver._patch.
guard	str C++ boolean expression, evaluated per cell in touchCellFirstTime.

Reimplemented from exahype2.api.rkfd4.actionsets.AbstractRKFD4ActionSet.AbstractRKFD4ActionSet.

Definition at line 30 of file ComputeLinearCombination.py.

Member Function Documentation

◆ get_action_set_name()

exahype2.api.rkfd4.actionsets.ComputeLinearCombination.ComputeLinearCombination.get_action_set_name ( self )

You should replicate this function in each subclass, so you get meaningful action set names (otherwise, it will be AbstractRKFD4ActionSet0,1,2,...).

Reimplemented from exahype2.api.rkfd4.actionsets.AbstractRKFD4ActionSet.AbstractRKFD4ActionSet.

Definition at line 91 of file ComputeLinearCombination.py.

◆ get_body_of_operation()

exahype2.api.rkfd4.actionsets.ComputeLinearCombination.ComputeLinearCombination.get_body_of_operation	(	self,
		operation_name
	)

Return actual C++ code snippets to be inserted into C++ code.

See class' string constants starting with OPERATION_ for possible values of operation_name. The snippet is executed if and only if the guard returned by get_guard_of_operation() holds, i.e. the body should not evaluate the guard itself. See the section "Guard and body" in the class documentation.

Reimplemented from peano4.api.solversteps.ActionSet.ActionSet.

Definition at line 53 of file ComputeLinearCombination.py.

Referenced by peano4.api.solversteps.ActionSet.ActionSet.get_implementation_of_operation().

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◆ get_guard_of_operation()

exahype2.api.rkfd4.actionsets.ComputeLinearCombination.ComputeLinearCombination.get_guard_of_operation	(	self,
		operation_name
	)

Return the guard of an operation.

The guard is a C++ boolean expression. The body of the operation (see get_body_of_operation()) is executed if and only if the guard holds. The guard can use the same arguments as the body, i.e. the marker and the fine and coarse grid data. By default, the guard is true, i.e. the body is always executed.

See class' string constants starting with OPERATION_ for possible values of operation_name.

Reimplemented from peano4.api.solversteps.ActionSet.ActionSet.

Definition at line 83 of file ComputeLinearCombination.py.