#include <LinearIterator.h>
List of all members.
Detailed Description
An iterator over the components and coordinates of a linear geometry (LineStrings and MultiLineStrings.
The standard usage pattern for a LinearIterator is:
for (LinearIterator it = new LinearIterator(...); it.hasNext(); it.next()) {
...
int ci = it.getComponentIndex(); // for example
int vi = it.getVertexIndex(); // for example
...
}
- Version:
- 1.7
Constructor & Destructor Documentation
geos::linearref::LinearIterator::LinearIterator |
( |
const geom::Geometry * |
linear |
) |
|
Creates an iterator initialized to the start of a linear Geometry
- Parameters:
-
| linear | the linear geometry to iterate over |
Creates an iterator starting at a LinearLocation on a linear Geometry
- Parameters:
-
| linear | the linear geometry to iterate over |
| start | the location to start at |
geos::linearref::LinearIterator::LinearIterator |
( |
const geom::Geometry * |
linear, |
|
|
unsigned int |
componentIndex, |
|
|
unsigned int |
vertexIndex | |
|
) |
| | |
Creates an iterator starting at a component and vertex in a linear Geometry
- Parameters:
-
| linear | the linear geometry to iterate over |
| componentIndex | the component to start at |
| vertexIndex | the vertex to start at |
Member Function Documentation
unsigned int geos::linearref::LinearIterator::getComponentIndex |
( |
|
) |
const |
The component index of the vertex the iterator is currently at.
- Returns:
- the current component index
Gets the LineString component the iterator is current at.
- Returns:
- a linestring
Gets the second Coordinate of the current segment. (the coordinate of the next vertex). If the iterator is at the end of a line, null
is returned.
- Returns:
- a Coordinate or
null
Gets the first Coordinate of the current segment. (the coordinate of the current vertex).
- Returns:
- a Coordinate
unsigned int geos::linearref::LinearIterator::getVertexIndex |
( |
|
) |
const |
The vertex index of the vertex the iterator is currently at.
- Returns:
- the current vertex index
bool geos::linearref::LinearIterator::hasNext |
( |
|
) |
const |
Tests whether there are any vertices left to iterator over.
- Returns:
true
if there are more vertices to scan
bool geos::linearref::LinearIterator::isEndOfLine |
( |
|
) |
const |
Checks whether the iterator cursor is pointing to the endpoint of a linestring.
- Returns:
true</true> if the iterator is at an endpoint
void geos::linearref::LinearIterator::next |
( |
|
) |
|
Moves the iterator ahead to the next vertex and (possibly) linear component.
The documentation for this class was generated from the following file: