TimeStep Class Reference

Representation of one time step.. More...

#include <time_governor.hh>

Public Member Functions
	TimeStep (double init_time)
	TimeStep ()
	TimeStep (const TimeStep &other)
TimeStep	make_next (double new_length) const
TimeStep	make_next (double new_lenght, double end_time) const
unsigned int	index () const
double	length () const
double	end () const
bool	gt (double other_time) const
bool	ge (double other_time) const
bool	lt (double other_time) const
bool	le (double other_time) const
bool	eq (double other_time) const
bool	contains (double other_time) const
bool	operator== (const TimeStep &other)

Private Member Functions
bool	safe_compare (double t1, double t0) const

Private Attributes
unsigned int	index_
	Index of the step is index if the end time. Zero time step is artificial. More...
double	length_
double	end_
	End time point of the time step. More...

Detailed Description

Representation of one time step..

Time step consists of the time step length() and from time step () time. More over we store the index of the time step within it time governor.

The reason to store both the end time and the length of the time step is to allow safe comparisons of the time with safety margin small relative to the time step length.

Definition at line 52 of file time_governor.hh.

Constructor & Destructor Documentation

TimeStep::TimeStep

(

double

init_time

)

Constructor of the zero time step.

Definition at line 68 of file time_governor.cc.

TimeStep::TimeStep

(

)

Default constructor. Creates undefined time step.

Definition at line 76 of file time_governor.cc.

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TimeStep::TimeStep

(

const TimeStep &

other

)

Copy constructor.

Definition at line 85 of file time_governor.cc.

Member Function Documentation

bool TimeStep::contains ( double  other_time ) const

inline

Definition at line 123 of file time_governor.hh.

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double TimeStep::end ( ) const

inline

Definition at line 90 of file time_governor.hh.

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bool TimeStep::eq ( double  other_time ) const

inline

Definition at line 120 of file time_governor.hh.

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bool TimeStep::ge ( double  other_time ) const

inline

Definition at line 102 of file time_governor.hh.

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TimeStep::gt ( double  other_time ) const

inline

Performs rounding safe comparison time > other_time, i.e. time is strictly greater than given parameter other_time with precision relative to the magnitude of the numbers time step. TODO: introduce type TimeDouble with overloaded comparison operators, use it consistently in TimeMarks.

Performs rounding safe comparison time >= other_time See

Performs rounding safe comparison time < other_time. See

Performs rounding safe comparison time <= other_time. See

Performs rounding safe comparison time (step) == other_time. See

Definition at line 96 of file time_governor.hh.

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unsigned int TimeStep::index ( ) const

inline

Getters.

Definition at line 88 of file time_governor.hh.

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bool TimeStep::le ( double  other_time ) const

inline

Definition at line 114 of file time_governor.hh.

double TimeStep::length ( ) const

inline

Definition at line 89 of file time_governor.hh.

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bool TimeStep::lt ( double  other_time ) const

inline

Definition at line 108 of file time_governor.hh.

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TimeStep TimeStep::make_next

(

double

new_length

)

const

Create subsequent time step.

Definition at line 93 of file time_governor.cc.

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TimeStep TimeStep::make_next	(	double	new_lenght,
		double	end_time
	)		const

Create subsequent time step, with the explicitly specified. This allow slight discrepancy to overcome rounding errors in the case of fixed time step. Otherwise using small fixed time step, we may miss long term fixed goal time.

Definition at line 100 of file time_governor.cc.

bool TimeStep::operator== ( const TimeStep &  other )

inline

Returns true if two time steps are exactly the same.

Definition at line 129 of file time_governor.hh.

bool TimeStep::safe_compare ( double  t1, double  t0  ) const

private

Definition at line 111 of file time_governor.cc.

Member Data Documentation

double TimeStep::end_

private

End time point of the time step.

Definition at line 147 of file time_governor.hh.

unsigned int TimeStep::index_

private

Index of the step is index if the end time. Zero time step is artificial.

Definition at line 142 of file time_governor.hh.

double TimeStep::length_

private

Length of the time step. Theoretically end minus end of the previous time step. However may be slightly different due to rounding errors.

Definition at line 145 of file time_governor.hh.

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The documentation for this class was generated from the following files:

• /opt/flow123d/flow123d/src/tools/time_governor.hh
• /opt/flow123d/flow123d/src/tools/time_governor.cc