com.mapinfo.midev.coordsys.transform

Class CoordTransform

java.lang.Object

com.mapinfo.midev.coordsys.transform.CoordTransform

All Implemented Interfaces:

com.mapinfo.midev.geometry.IDirectPositionMutator

public final class CoordTransform
extends Object
implements com.mapinfo.midev.geometry.IDirectPositionMutator

Used to convert coordinates from one coordinate system to another.

Constructor Summary

Constructors

Constructor and Description
CoordTransform(CoordSys srcCoordSys, CoordSys destCoordSys) Create a coordinate transform from one coordinate system to another.

Method Summary

Modifier and Type	Method and Description
boolean	isAffine() Returns true if this CoordTransform is affine; false if not.
boolean	isIdentity() Returns true if this CoordTransform is an identity transform; false if not.
boolean	isLinear() Returns true if this CoordTransform is linear; false if not.
com.mapinfo.midev.geometry.DirectPosition	transform(com.mapinfo.midev.geometry.DirectPosition source, com.mapinfo.midev.geometry.DirectPosition destination) Returns the specified source DirectPosition transformed to the destination CoordSys.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CoordTransform

public CoordTransform(CoordSys srcCoordSys,
                      CoordSys destCoordSys)

Create a coordinate transform from one coordinate system to another.

Parameters:

srcCoordSys - Transform coordinates from this coordinate system.

destCoordSys - Transform coordinates to this coordinate system.

Method Detail

isAffine

public boolean isAffine()

Returns true if this CoordTransform is affine; false if not.

Returns:

true if this CoordTransform is affine; false if not.

isLinear

public boolean isLinear()

Returns true if this CoordTransform is linear; false if not.

Returns:

true if this CoordTransform is linear; false if not.

isIdentity

public boolean isIdentity()

Returns true if this CoordTransform is an identity transform; false if not.

Returns:

true if this CoordTransform is an identity transform; false if not.

transform

public com.mapinfo.midev.geometry.DirectPosition transform(com.mapinfo.midev.geometry.DirectPosition source,
                                                           com.mapinfo.midev.geometry.DirectPosition destination)

Returns the specified source DirectPosition transformed to the destination CoordSys. The specified destination DirectPosition is also updated with the transformed coordinates and in fact is the same reference as returned by this method. The source and destination may be the same reference.

Specified by:

transform in interface com.mapinfo.midev.geometry.IDirectPositionMutator

Parameters:

source - The DirectPosition to transform.

destination - The DirectPosition to hold the transformed source DirectPosition. Also returned via the method.

Returns:

the specified source DirectPosition transfered to the destination CoordSys.