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Add missing docs, refine docs for QgsCoordinateTransform

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nyalldawson committed Jul 17, 2016
1 parent adafeda commit e6df492fdb5f848c5d74e2cb785e4f0c83d5a031
Showing with 195 additions and 91 deletions.
  1. +104 −52 python/core/qgscoordinatetransform.sip
  2. +91 −39 src/core/qgscoordinatetransform.h
@@ -98,78 +98,130 @@ class QgsCoordinateTransform
*/
QgsCoordinateReferenceSystem destinationCrs() const;

/** Transform the point from Source Coordinate System to Destination Coordinate System
* If the direction is ForwardTransform then coordinates are transformed from layer CS --> map canvas CS,
* otherwise points are transformed from map canvas CS to layerCS.
* @param point Point to transform
* @param direction TransformDirection (defaults to ForwardTransform)
* @return QgsPoint in Destination Coordinate System
*/
QgsPoint transform( const QgsPoint &point, TransformDirection direction = ForwardTransform ) const throw (QgsCsException);

/** Transform the point specified by x,y from Source Coordinate System to Destination Coordinate System
* If the direction is ForwardTransform then coordinates are transformed from layer CS --> map canvas CS,
* otherwise points are transformed from map canvas CS to layerCS.
* @param x x cordinate of point to transform
/** Transform the point from the source CRS to the destination CRS.
* If the direction is ForwardTransform then coordinates are transformed from source to destination,
* otherwise points are transformed from destination to source CRS.
* @param point point to transform
* @param direction transform direction (defaults to ForwardTransform)
* @return transformed point
*/
QgsPoint transform( const QgsPoint& point, TransformDirection direction = ForwardTransform ) const;

/** Transform the point specified by x,y from the source CRS to the destination CRS.
* If the direction is ForwardTransform then coordinates are transformed from source to destination,
* otherwise points are transformed from destination to source CRS.
* @param x x coordinate of point to transform
* @param y y coordinate of point to transform
* @param direction TransformDirection (defaults to ForwardTransform)
* @return QgsPoint in Destination Coordinate System
* @param direction transform direction (defaults to ForwardTransform)
* @return transformed point
*/
QgsPoint transform( const double x, const double y, TransformDirection direction = ForwardTransform ) const throw (QgsCsException);
QgsPoint transform( const double x, const double y, TransformDirection direction = ForwardTransform ) const;

/** Transforms a QgsRectangle to the dest Coordinate system
* If the direction is ForwardTransform then coordinates are transformed from layer CS --> map canvas CS,
* otherwise points are transformed from map canvas CS to layerCS.
* It assumes that rect is a bounding box, and creates a bounding box
* in the proejcted CS, so that all points in source rectangle is within
* returned rectangle.
/** Transforms a rectangle from the source CRS to the destination CRS.
* If the direction is ForwardTransform then coordinates are transformed from source to destination,
* otherwise points are transformed from destination to source CRS.
* This method assumes that the rectangle is a bounding box, and creates a bounding box
* in the projected CRS, such that all points from the source rectangle are within
* the returned rectangle.
* @param rectangle rectangle to transform
* @param direction TransformDirection (defaults to ForwardTransform)
* @param handle180Crossover set to true if destination crs is geographic and handling of extents crossing the 180 degree
* longitude line is required
* @return QgsRectangle in Destination Coordinate System
* @param direction transform direction (defaults to ForwardTransform)
* @param handle180Crossover set to true if destination CRS is geographic and handling of extents
* crossing the 180 degree longitude line is required
* @return rectangle in destination CRS
*/
QgsRectangle transformBoundingBox( const QgsRectangle& rectangle, TransformDirection direction = ForwardTransform, const bool handle180Crossover = false ) const;

/** Transforms an array of x, y and z double coordinates in place, from the source CRS to the destination CRS.
* If the direction is ForwardTransform then coordinates are transformed from source to destination,
* otherwise points are transformed from destination to source CRS.
* @param x array of x coordinates of points to transform
* @param y array of y coordinates of points to transform
* @param z array of z coordinates of points to transform. The z coordinates of the points
* must represent height relative to the vertical datum of the source CRS (generally ellipsoidal
* heights) and must be expressed in its vertical units (generally meters)
* @param direction transform direction (defaults to ForwardTransform)
*/
QgsRectangle transformBoundingBox( const QgsRectangle &rectangle, TransformDirection direction = ForwardTransform, const bool handle180Crossover = false ) const throw (QgsCsException);
void transformInPlace( double& x, double& y, double &z, TransformDirection direction = ForwardTransform ) const;

// Same as for the other transform() functions, but alters the x
// and y variables in place. The second one works with good old-fashioned
// C style arrays.
void transformInPlace( double& x, double& y, double &z, TransformDirection direction = ForwardTransform ) const throw (QgsCsException);
/** Transforms an array of x, y and z float coordinates in place, from the source CRS to the destination CRS.
* If the direction is ForwardTransform then coordinates are transformed from source to destination,
* otherwise points are transformed from destination to source CRS.
* @param x array of x coordinates of points to transform
* @param y array of y coordinates of points to transform
* @param z array of z coordinates of points to transform. The z coordinates of the points
* must represent height relative to the vertical datum of the source CRS (generally ellipsoidal
* heights) and must be expressed in its vertical units (generally meters)
* @param direction transform direction (defaults to ForwardTransform)
* @note not available in python bindings
*/
//void transformInPlace( float& x, float& y, double &z, TransformDirection direction = ForwardTransform ) const;

// @note not available in python bindings
// void transformInPlace( float& x, float& y, double &z, TransformDirection direction = ForwardTransform ) const;
// @note not available in python bindings
/** Transforms an array of x, y and z float coordinates in place, from the source CRS to the destination CRS.
* If the direction is ForwardTransform then coordinates are transformed from source to destination,
* otherwise points are transformed from destination to source CRS.
* @param x array of x coordinates of points to transform
* @param y array of y coordinates of points to transform
* @param z array of z coordinates of points to transform. The z coordinates of the points
* must represent height relative to the vertical datum of the source CRS (generally ellipsoidal
* heights) and must be expressed in its vertical units (generally meters)
* @param direction transform direction (defaults to ForwardTransform)
* @note not available in python bindings
*/
// void transformInPlace( float& x, float& y, float& z, TransformDirection direction = ForwardTransform ) const;
// @note not available in python bindings
// void transformInPlace( QVector<float>& x, QVector<float>& y, QVector<float>& z,

/** Transforms a vector of x, y and z float coordinates in place, from the source CRS to the destination CRS.
* If the direction is ForwardTransform then coordinates are transformed from source to destination,
* otherwise points are transformed from destination to source CRS.
* @param x vector of x coordinates of points to transform
* @param y vector of y coordinates of points to transform
* @param z vector of z coordinates of points to transform. The z coordinates of the points
* must represent height relative to the vertical datum of the source CRS (generally ellipsoidal
* heights) and must be expressed in its vertical units (generally meters)
* @param direction transform direction (defaults to ForwardTransform)
* @note not available in python bindings
*/
//void transformInPlace( QVector<float>& x, QVector<float>& y, QVector<float>& z,
// TransformDirection direction = ForwardTransform ) const;

//! @note not available in python bindings
// void transformInPlace( QVector<double>& x, QVector<double>& y, QVector<double>& z,
// TransformDirection direction = ForwardTransform ) const;
/** Transforms a vector of x, y and z double coordinates in place, from the source CRS to the destination CRS.
* If the direction is ForwardTransform then coordinates are transformed from source to destination,
* otherwise points are transformed from destination to source CRS.
* @param x vector of x coordinates of points to transform
* @param y vector of y coordinates of points to transform
* @param z vector of z coordinates of points to transform. The z coordinates of the points
* must represent height relative to the vertical datum of the source CRS (generally ellipsoidal
* heights) and must be expressed in its vertical units (generally meters)
* @param direction transform direction (defaults to ForwardTransform)
* @note not available in python bindings
*/
//void transformInPlace( QVector<double>& x, QVector<double>& y, QVector<double>& z,
// TransformDirection direction = ForwardTransform ) const;

/** Transforms a polygon to the destination coordinate system.
* @param polygon polygon to transform (occurs in place)
* @param direction transform direction (defaults to forward transformation)
*/
void transformPolygon( QPolygonF& polygon, TransformDirection direction = ForwardTransform ) const;

/** Transform a QgsRectangle to the dest Coordinate system
* If the direction is ForwardTransform then coordinates are transformed from layer CS --> map canvas CS,
* otherwise points are transformed from map canvas CS to layerCS.
* @param rectangle rect to transform
* @param direction TransformDirection (defaults to ForwardTransform)
* @return QgsRectangle in Destination Coordinate System
/** Transforms a rectangle to the destination CRS.
* If the direction is ForwardTransform then coordinates are transformed from source to destination,
* otherwise points are transformed from destination to source CRS.
* @param rectangle rectangle to transform
* @param direction transform direction (defaults to ForwardTransform)
* @return transformed rectangle
*/
QgsRectangle transform( const QgsRectangle &rectangle, TransformDirection direction = ForwardTransform ) const throw (QgsCsException);
QgsRectangle transform( const QgsRectangle &rectangle, TransformDirection direction = ForwardTransform ) const;

/** Transform an array of coordinates to a different Coordinate System
* If the direction is ForwardTransform then coordinates are transformed from layer CS --> map canvas CS,
* otherwise points are transformed from map canvas CS to layerCS.
/** Transform an array of coordinates to the destination CRS.
* If the direction is ForwardTransform then coordinates are transformed from source to destination,
* otherwise points are transformed from destination to source CRS.
* @param numPoint number of coordinates in arrays
* @param x array of x coordinates to transform
* @param y array of y coordinates to transform
* @param z array of z coordinates to transform
* @param direction TransformDirection (defaults to ForwardTransform)
* @return QgsRectangle in Destination Coordinate System
* @param direction transform direction (defaults to ForwardTransform)
*/
void transformCoords( int numPoint, double *x, double *y, double *z, TransformDirection direction = ForwardTransform ) const throw (QgsCsException);
void transformCoords( int numPoint, double *x, double *y, double *z, TransformDirection direction = ForwardTransform ) const;

/** Returns true if the transform short circuits because the source and destination are equivalent.
*/

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