public class TLcdLOSCoverageFactory extends Object
A TLcdLOSCoverageFactory
is a factory which creates ILcdLOSCoverageMatrix
objects
representing the result of a lineofsight computation around a point. These computations are based on
propagation functions describing the visibility along an azimuth. The resulting matrices can then be
converted into a raster or a list of polygons.
For example, to create a lineofsight raster:
ILcdLOSPropagationFunction
) describing how
the detection wave propagates (visual, radar).ILcdLOSCoverage
describes
both the outline of the area and the sampling inside the area.createLOSCoverageMatrix
to compute the lineofsight
according to the propagation function on the covered area. The result is returned as an
ILcdLOSCoverageMatrix
in the specified reference.createLOSCoverageRaster
.
This raster can be used to display the result of the lineofsight computations in a view using a
ILcdRasterPainter
.Constructor and Description 

TLcdLOSCoverageFactory()
Defines a lineofsight coverage factory.

Modifier and Type  Method and Description 

void 
addStatusListener(ILcdStatusListener aStatusListener)
Starts notifying a listener with the progress of lineofsight computations and result conversions.

ILcdValuedPolygon[] 
createLOSCoverageContours(ILcdLOSCoverageMatrix aLOSCoverageMatrix,
ILcdGeoReference aTargetReference,
double[] aContourLevels)
Deprecated.
Use
createLOSCoverageContours(ILcdLOSCoverageMatrix, com.luciad.reference.ILcdGeoReference, com.luciad.contour.TLcdComplexPolygonContourFinder.IntervalMode, double[], double[]) instead.
This method relies on deprecated contour finding algorithms. The output of the new contour finding algorithms are
much more practical to work with as they define complex polygons within an interval range, instead of simple
polygons that represent contour edges. This method has been kept for compatibility reasons with LuciadMap 
ILcdBounded[] 
createLOSCoverageContours(ILcdLOSCoverageMatrix aLOSCoverageMatrix,
ILcdGeoReference aTargetReference,
TLcdComplexPolygonContourFinder.IntervalMode aIntervalMode,
double[] aContourIntervalLevels,
double[] aContourSpecialValues)
Generates complex polygon contours from the given
ILcdLOSCoverageMatrix using the target reference
and the contour levels. 
ILcdLOSCoverageMatrix 
createLOSCoverageMatrix(ILcdLOSPropagationFunction aLOSPropagationFunction,
ILcdLOSCoverage aLOSCoverage,
ILcdGeoReference aTargetReference)
Creates a
ILcdLOSCoverageMatrix representing the result of lineofsight
computations on the given area aLOSCoverage using the propagation
function aLOSPropagationFunction . 
ILcdRaster 
createLOSCoverageRaster(ILcdLOSCoverageMatrix aLOSCoverageMatrix,
ILcdMatrixRasterValueMapper aMatrixRasterValueMapper,
ILcdGeoReference aTargetReference,
double aTargetPixelDensity,
TLcdCoverageFillMode aFillMode)
Creates an
ILcdRaster from the ILcdLOSCoverageMatrix using the given
target reference, pixel density and fill mode. 
void 
removeStatusListener(ILcdStatusListener aStatusListener)
Terminates notifying a listener of the progress of lineofsight computations and result conversions.

public TLcdLOSCoverageFactory()
public void removeStatusListener(ILcdStatusListener aStatusListener)
aStatusListener
 will no longer be notified of progress when running a lineofsight computation
or when converting a coverage matrix to either a raster or a set of polygon contours.addStatusListener(ILcdStatusListener)
public void addStatusListener(ILcdStatusListener aStatusListener)
aStatusListener
 will be notified of progress when running a lineofsight computation
and when converting a coverage matrix to either a raster or a set of polygon contours.removeStatusListener(ILcdStatusListener)
public ILcdLOSCoverageMatrix createLOSCoverageMatrix(ILcdLOSPropagationFunction aLOSPropagationFunction, ILcdLOSCoverage aLOSCoverage, ILcdGeoReference aTargetReference)
Creates a ILcdLOSCoverageMatrix
representing the result of lineofsight
computations on the given area aLOSCoverage
using the propagation
function aLOSPropagationFunction
.
The target reference aTargetReference
defines the reference in which
the coverage matrix will be defined. Currently, only geodetic target references
are supported.
The coverage matrix contains coordinates that should be interpreted in the target reference. The points in the matrix cover the area of the lineofsight coverage passed with intermediate steps as in the lineofsight coverage.
Note that, when the current thread is interrupted, null
is returned.
aLOSPropagationFunction
 The propagation function to use for the computation.aLOSCoverage
 The covered area and the intermediate step sizes.aTargetReference
 The reference in which the result will be defined.ILcdLOSCoverageMatrix
representing the result of lineofsight
computations on the given area using the given propagation function.NullPointerException
 when a null
argument is found or when the
propagation function was not set.IllegalArgumentException
 if the propagation function does not accept the
parameter aLOSCoverage
or when the target reference is not a geodetic
reference.public ILcdRaster createLOSCoverageRaster(ILcdLOSCoverageMatrix aLOSCoverageMatrix, ILcdMatrixRasterValueMapper aMatrixRasterValueMapper, ILcdGeoReference aTargetReference, double aTargetPixelDensity, TLcdCoverageFillMode aFillMode)
Creates an ILcdRaster
from the ILcdLOSCoverageMatrix
using the given
target reference, pixel density and fill mode. The aTargetReference
defines the
reference in which the raster will be defined. Using the pixel density and the fill mode, the
given lineofsight coverage matrix is resampled into a rectangular coverage.
The target pixel density is the pixel density of the resulting raster. This is the average number of pixels in an area of 1 by 1 in model coordinates. Higher densities will lead to more detailed coverages of the area. Note that the result is bound by the density of the samples taken of the underlying terrain data (which depends on the radial and angular step sizes used in the lineofsight coverage to create the coverage matrix). The size occupied in memory by the coverage will increase linearly with this density.
The fill mode aFillMode
indicates how the raster should be filled. Possible choices
are:
The fill mode is combined with the given ILcdMatrixRasterValueMapper
to map the matrix
entry values onto raster pixel values. There are two possibilities. The first maps a matrix value to
a raster value. This forward mapping is used with the minimum and the maximum fill mode. The method
ILcdMatrixRasterValueMapper.mapMatrixValue
will be
used to retrieve the raster value. The second maps a raster pixel to a number of matrix entries and
combines the corresponding matrix values to a raster value, ensuring that all raster pixels are filled
with a value. This backwards mapping is used with the nearest neighbor fill mode. The interface method
ILcdMatrixRasterValueMapper.combineMatrixValues
is used with only one matrix value which corresponds to the matrix value of the point nearest to the
raster pixel and only one weight value, which is 1
.
Note that, when the current thread is interrupted, null
is returned.
aLOSCoverageMatrix
 The matrix to convert.aMatrixRasterValueMapper
 Mapper to map matrix values on raster values.aTargetReference
 The target reference in which the result will be defined.aTargetPixelDensity
 The pixel density of the resulting raster.aFillMode
 The fill mode indicating how the raster should be filled.NullPointerException
 when one of the arguments (aLOSCoverageMatrix
,
aMatrixRasterValueMapper
, aTargetReference
or aFillMode
)
is null
.IllegalArgumentException
 when aTargetReference is a geocentric reference
.public ILcdValuedPolygon[] createLOSCoverageContours(ILcdLOSCoverageMatrix aLOSCoverageMatrix, ILcdGeoReference aTargetReference, double[] aContourLevels)
createLOSCoverageContours(ILcdLOSCoverageMatrix, com.luciad.reference.ILcdGeoReference, com.luciad.contour.TLcdComplexPolygonContourFinder.IntervalMode, double[], double[])
instead.
This method relies on deprecated contour finding algorithms. The output of the new contour finding algorithms are
much more practical to work with as they define complex polygons within an interval range, instead of simple
polygons that represent contour edges. This method has been kept for compatibility reasons with LuciadMap
Generates contour lines from the given ILcdLOSCoverageMatrix
using the target reference
and the contour levels. The contours are returned as a set of ILcdValuedPolygon
objects.
The target reference defines the reference in which the polygons will be defined.
The contour levels define the different heights on which the contours will be calculated. They should be ordered from low to high.
The edge of a polygon indicates a contour line of equal height. The orientation of the returned polygons should be interpreted as follows:
Note that, when the current thread is interrupted, null
is returned.
aLOSCoverageMatrix
 The matrix to convert.aTargetReference
 The target reference in which the polygons are defined.aContourLevels
 The different levels to compute the contours on.NullPointerException
 when a null
argument is found.public ILcdBounded[] createLOSCoverageContours(ILcdLOSCoverageMatrix aLOSCoverageMatrix, ILcdGeoReference aTargetReference, TLcdComplexPolygonContourFinder.IntervalMode aIntervalMode, double[] aContourIntervalLevels, double[] aContourSpecialValues)
Generates complex polygon contours from the given ILcdLOSCoverageMatrix
using the target reference
and the contour levels. The contours are returned as a set of TLcdIntervalContour
and
TLcdValuedContour
objects, which are stored in an array of ILcdBounded
, and which
have a ILcdComplexPolygon
as base shape.
TLcdIntervalContour are used when the complex polygon defines an area between an interval of two values, that is
when two numerical parameters are needed to describe the area,
TLcdValuedContour are used when the complex polygon defines a special value area or when the interval
mode is LOWER or HIGHER, that is, when one numerical parameter is needed.
The target reference defines the reference in which the shapes will be defined.
The interval levels define the different heights on which the contours will be calculated. They should be ordered from low to high. The special values define the values which are not heights around which specific contours should be created.
Note that, when the current thread is interrupted, null
is returned.
aLOSCoverageMatrix
 The matrix to convert.aTargetReference
 The target reference in which the polygons are defined.aIntervalMode
 The interval mode to use by the contour finder. When INTERVAL is given,
the contours for all levels will be disjoint, "donutshaped" complex polygons. When LOWER or HIGHER is
given, the complex polygons will overlap but may have less edges. When LOWER is used, the complex polygons
need to be drawn in inverse order of return.aContourIntervalLevels
 Contour values for intervalsaContourSpecialValues
 Contour values for special valuesNullPointerException
 when a null
argument is found.IllegalArgumentException
 when a height level or special value is invalid.