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casacore
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#include <MConvertBase.h>
Public Member Functions | |
| virtual | ~MConvertBase () |
| virtual void | setModel (const Measure &val)=0 |
| Set a new model for the conversion. More... | |
| virtual void | set (const MeasValue &val)=0 |
| Set a new model value only. More... | |
| virtual void | set (const Unit &inunit)=0 |
| Set a new model unit only. More... | |
| virtual void | addMethod (uInt method)=0 |
| Add a method (Note: uInt should be an enum from the appropiate Measure) More... | |
| virtual void | addFrameType (uInt tp)=0 |
| Add a FrameTypes used (as specified in MeasFrame::FrameTypes) More... | |
| virtual Int | nMethod () const =0 |
| Get number of methods. More... | |
| virtual uInt | getMethod (uInt which) const =0 |
| Get method. More... | |
| virtual void | print (ostream &os) const =0 |
| Print a conversion engine. More... | |
Conversion of Measures Base
Internal
MConvertBase can convert a Measure to the same type of Measure in a different reference frame. The MConvertBase is a templated class, but has typedefs for the allowed conversions, like MEpoch::Convert.
The basic operation is to create a MConvertBase with either of:
An empty MeasRef indicates no conversion
. The constructor, and set functions, analyse the 'template' Measure and the output reference frame, and construct a pointer (in practice a list of pointers to bypass the necessity of creating too many conversion functions) to a conversion routine. Functionals will maybe used in a later version in stead of a vector of function pointers. During the implementation process, I have, for a variety of reasons, changed the list of function pointers to a list of numbers, with the Measure having just a doConvert() function containing an appropiate switch statement.
Actual conversions are done with the () operator, which produces a new MEpoch (or other Measure).
Possible arguments are (MVEpoch is used here generic, and indicates the internal format of a Measure; possibly, to make sure distinction between values with and without units is possible, even simple Measures will have their own internal class format, e.g. MVDouble. This will also aid in the possibility that I am still pursuing to have a fully dynamic conversion possibility. However, to be able to use pointers to functions in any reasonable way for all possible input and output types, a multi-level approach is necessary, with all possible datatypes derived from some MeasValue.):
Float versions will be produced if necessary.
The conversion analyser expects that all Measure classes have a set of routines to do the actual analysing and conversion.
If the standard conversion is not sufficient, additional methods can be added at the end of the list with the addMethod() member function, or at the beginning of the list with insertMethod(). The whole list can be cleared with clearMethod().
To ease the specification of the Method, each Measure has a typedef (e.g. MEpoch_ConvType) specifying the Method type.
See Measure for an example
Conversion of Measures will in general be done on a series of values. Separating the analysis of the calculations necessary for the conversion from the actual conversion could speed up the process.
Definition at line 147 of file MConvertBase.h.
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virtual |
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pure virtual |
Add a FrameTypes used (as specified in MeasFrame::FrameTypes)
Implemented in casacore::MeasConvert< M >, casacore::MeasConvert< MRadialVelocity >, casacore::MeasConvert< MBaseline >, casacore::MeasConvert< MDirection >, casacore::MeasConvert< MFrequency >, casacore::MeasConvert< MEarthMagnetic >, casacore::MeasConvert< MDoppler >, and casacore::MeasConvert< MEpoch >.
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pure virtual |
Add a method (Note: uInt should be an enum from the appropiate Measure)
Implemented in casacore::MeasConvert< M >, casacore::MeasConvert< MRadialVelocity >, casacore::MeasConvert< MBaseline >, casacore::MeasConvert< MDirection >, casacore::MeasConvert< MFrequency >, casacore::MeasConvert< MEarthMagnetic >, casacore::MeasConvert< MDoppler >, and casacore::MeasConvert< MEpoch >.
Get method.
Implemented in casacore::MeasConvert< M >, casacore::MeasConvert< MRadialVelocity >, casacore::MeasConvert< MBaseline >, casacore::MeasConvert< MDirection >, casacore::MeasConvert< MFrequency >, casacore::MeasConvert< MEarthMagnetic >, casacore::MeasConvert< MDoppler >, and casacore::MeasConvert< MEpoch >.
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pure virtual |
Get number of methods.
Implemented in casacore::MeasConvert< M >, casacore::MeasConvert< MRadialVelocity >, casacore::MeasConvert< MBaseline >, casacore::MeasConvert< MDirection >, casacore::MeasConvert< MFrequency >, casacore::MeasConvert< MEarthMagnetic >, casacore::MeasConvert< MDoppler >, and casacore::MeasConvert< MEpoch >.
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pure virtual |
Print a conversion engine.
Implemented in casacore::MeasConvert< M >, casacore::MeasConvert< MRadialVelocity >, casacore::MeasConvert< MBaseline >, casacore::MeasConvert< MDirection >, casacore::MeasConvert< MFrequency >, casacore::MeasConvert< MEarthMagnetic >, casacore::MeasConvert< MDoppler >, and casacore::MeasConvert< MEpoch >.
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pure virtual |
Set a new model value only.
Implemented in casacore::MeasConvert< M >, casacore::MeasConvert< MRadialVelocity >, casacore::MeasConvert< MBaseline >, casacore::MeasConvert< MDirection >, casacore::MeasConvert< MFrequency >, casacore::MeasConvert< MEarthMagnetic >, casacore::MeasConvert< MDoppler >, and casacore::MeasConvert< MEpoch >.
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pure virtual |
Set a new model unit only.
Implemented in casacore::MeasConvert< M >, casacore::MeasConvert< MRadialVelocity >, casacore::MeasConvert< MBaseline >, casacore::MeasConvert< MDirection >, casacore::MeasConvert< MFrequency >, casacore::MeasConvert< MEarthMagnetic >, casacore::MeasConvert< MDoppler >, and casacore::MeasConvert< MEpoch >.
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pure virtual |
Set a new model for the conversion.
Implemented in casacore::MeasConvert< M >, casacore::MeasConvert< MRadialVelocity >, casacore::MeasConvert< MBaseline >, casacore::MeasConvert< MDirection >, casacore::MeasConvert< MFrequency >, casacore::MeasConvert< MEarthMagnetic >, casacore::MeasConvert< MDoppler >, and casacore::MeasConvert< MEpoch >.
1.9.1