com.bbn.openmap.dataAccess.dted
Class DTEDSlopeGenerator

java.lang.Object
  com.bbn.openmap.omGraphics.grid.SlopeGenerator
      com.bbn.openmap.dataAccess.dted.DTEDSlopeGenerator

All Implemented Interfaces:

OMGridGenerator

public class DTEDSlopeGenerator
extends SlopeGenerator

The DTEDSlopeGenerator is an extension to the SlopeGenerator that uses OMScalingRasters for images created from the DTED data. It caches the image and will reuse it if the projection parameters allow it. It's needed because it assumes that the OMGrid used is a OMDTEDGrid, which has the lat/lons of the lower left and upper right corners of the DTED frame.

Field Summary

protected float	generatedScale The scale at which the cached raster was generated.
protected OMRaster	raster The cached OMScalingRaster, which can be reused instead of regenerated in some projection circumstances.

Fields inherited from class com.bbn.openmap.omGraphics.grid.SlopeGenerator

colors, contrast, incomplete

Constructor Summary

DTEDSlopeGenerator()

DTEDSlopeGenerator(ElevationColors elevColors)

Method Summary

OMGraphic	generate(OMGrid grid, Projection proj) Called from the OMGrid.generate() method to tell the generator to create something to represent the grid contents.
protected OMRaster	getRaster(OMGrid grid) Called from within generate to create an OMRaster object for the OMGrid.

Methods inherited from class com.bbn.openmap.omGraphics.grid.SlopeGenerator

generateRasterForProjection, getColors, getContrast, getSlopeRun, isIncompleteImage, needGenerateToRender, setColors, setContrast

Methods inherited from class java.lang.Object

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

Field Detail

raster

protected OMRaster raster

The cached OMScalingRaster, which can be reused instead of regenerated in some projection circumstances.

generatedScale

protected float generatedScale

The scale at which the cached raster was generated.

Constructor Detail

DTEDSlopeGenerator

public DTEDSlopeGenerator()

DTEDSlopeGenerator

public DTEDSlopeGenerator(ElevationColors elevColors)

Method Detail

getRaster

protected OMRaster getRaster(OMGrid grid)

Called from within generate to create an OMRaster object for the OMGrid. This method exists to make it easier to extend this class to create an OMRaster as needed.

Overrides:

getRaster in class SlopeGenerator

generate

public OMGraphic generate(OMGrid grid,
                          Projection proj)

Called from the OMGrid.generate() method to tell the generator to create something to represent the grid contents.

Specified by:

generate in interface OMGridGenerator

Overrides:

generate in class SlopeGenerator