#include <cartotype_projection.h>
Public Member Functions | |
| CT_IMPORT TResult | Project (const TPoint &aInput, TPoint &aOutput) const |
| CT_IMPORT TResult | Inverse (const TPoint &aInput, TPoint &aOutput) const |
| CT_IMPORT TResult | ProjectTo64ths (const TPoint &aInput, TPoint &aOutput) const |
| CT_IMPORT TResult | Write (TDataOutputStream &aOutput) const |
| void | Sync () |
Protected Member Functions | |
| CT_IMPORT | TProjection (const TProjectionParam &aParam) |
| virtual TResult | CalculateProjection (TPointFixedSmall &aPoint) const =0 |
| virtual TResult | CalculateInverse (TPointFixedSmall &aPoint) const =0 |
Protected Attributes | |
| int32 | iFalseEasting |
| int32 | iFalseNorthing |
| TFixedSmall | iLambda0 |
| TFixedSmall | iPhi0 |
| double | iFixedToRadians |
| TProjectionParam | iParam |
Detailed Description
The abstract base class for projection classes using fixed-point arithmetic.
Constructor & Destructor Documentation
| CT_EXPORT TProjection::TProjection | ( | const TProjectionParam & | aParam | ) | [protected] |
Construct a TProjection object and set iErrorStatus if the basic projection parameters will cause overflow.
Member Function Documentation
Apply the inverse of the projection to the point in aInput in pixels and place the resulting point, in latitude and longitude expressed as 65536ths of a degree, in aOutput.
Implements CartoType::TCoordinateTransform.
Apply the projection to the point in aInput in latitude and longitude, expressed as degrees or 64ths of degrees in 16.16 fixed-point format, according to how the projection was set up (see TCoordinateTransformParam), and place the resulting point, in pixels, in aOutput.
Implements CartoType::TCoordinateTransform.
| CT_EXPORT TResult TProjection::ProjectTo64ths | ( | const TPoint & | aInput, |
| TPoint & | aOutput | ||
| ) | const [virtual] |
Apply the projection to the point in aInput in latitude and longitude, expressed as degrees or 64ths of degrees in 16.16 fixed-point format, according to how the projection was set up (see TCoordinateTransformParam), and place the resulting point, in 64ths of pixels, in aOutput.
Implements CartoType::TCoordinateTransform.
| void CartoType::TProjection::Sync | ( | ) | [inline, virtual] |
Update any internal parameters after a change to a coordinate transform.
Reimplemented from CartoType::TCoordinateTransform.
| CT_EXPORT TResult TProjection::Write | ( | TDataOutputStream & | aOutput | ) | const [virtual] |
A virtual function to write a projection object as serialized data. Derived classes call this base function then write any data of their own. What is written is not the constructed object but the parameter block needed to create it; in this case TCoordinateTransformParam.
Reimplemented from CartoType::TCoordinateTransform.
Reimplemented in CartoType::TTransverseMercator.
Member Data Documentation
int32 CartoType::TProjection::iFalseEasting [protected] |
False easting in pixels.
int32 CartoType::TProjection::iFalseNorthing [protected] |
False northing in pixels.
double CartoType::TProjection::iFixedToRadians [protected] |
Factor for conversion from input to radians.
TFixedSmall CartoType::TProjection::iLambda0 [protected] |
Central meridian in radians.
TProjectionParam CartoType::TProjection::iParam [protected] |
The parameters used to construct the object; saved to make it easier to serialise.
TFixedSmall CartoType::TProjection::iPhi0 [protected] |
Latitude of origin in radians
The documentation for this class was generated from the following files:
- cartotype_projection.h
- cartotype_projection.cpp
