com.bbn.openmap.omGraphics.grid
Class SimpleColorGenerator

java.lang.Object
  com.bbn.openmap.omGraphics.grid.SimpleColorGenerator

All Implemented Interfaces:

OMGridGenerator

Direct Known Subclasses:

ElevationBandGenerator

public class SimpleColorGenerator
extends java.lang.Object
implements OMGridGenerator

The SimpleColorGenerator is an OMGridGenerator that creates an OMRaster out of OMGrid data. The OMgrid data is assumed to be color ARGB integer values. Each pixel is colored according to the closest grid data point value.

Nested Class Summary

protected class	SimpleColorGenerator.ByteRasterHelper
protected class	SimpleColorGenerator.CharRasterHelper
protected class	SimpleColorGenerator.DoubleRasterHelper
protected class	SimpleColorGenerator.FloatRasterHelper
protected class	SimpleColorGenerator.IntRasterHelper
protected static interface	SimpleColorGenerator.RasterHelper
protected class	SimpleColorGenerator.ShortRasterHelper

Constructor Summary

SimpleColorGenerator()

Method Summary

int	calibratePointValue(int source) Takes the value assigned to a pixel, as determined by it's location in the grid, and gives a color to paint the pixel.
int[]	createGreyscaleColors(int num_colors, int opaqueness) This method creates a set of greyscale colors.
OMGraphic	generate(OMGrid grid, Projection proj) Going to return an OMRaster, sized to the current projection, and colored according to the colortable.
protected SimpleColorGenerator.RasterHelper	getRasterHelper(GridData gd)
boolean	needGenerateToRender() We at least need one generate for XY and OFFSET grids.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleColorGenerator

public SimpleColorGenerator()

Method Detail

generate

public OMGraphic generate(OMGrid grid,
                          Projection proj)

Going to return an OMRaster, sized to the current projection, and colored according to the colortable. The grid values are indexes into the colortable. The grid should already be generated when it gets here - meaning that the bounds and parameters of the grid, as they apply to the projection, are figured out.

Specified by:

generate in interface OMGridGenerator

Parameters:

grid - the grid to create a raster for.

proj - description of the map.

calibratePointValue

public int calibratePointValue(int source)

Takes the value assigned to a pixel, as determined by it's location in the grid, and gives a color to paint the pixel. In this case, the grid point value IS the color value.

Parameters:

source - a grid point value assigned to the raster pixel.

Returns:

the ARGB to color the pixel.

needGenerateToRender

public boolean needGenerateToRender()

We at least need one generate for XY and OFFSET grids. We will need a generate every time the projection changes for LATLON rendertype grids. So return true for everything.

Specified by:

needGenerateToRender in interface OMGridGenerator

createGreyscaleColors

public int[] createGreyscaleColors(int num_colors,
                                   int opaqueness)

This method creates a set of greyscale colors. It isn't used in this class (SimpleColorGenerator), but it probably will be used in extended classes.

Parameters:

num_colors - the number of greys needed.

opaqueness - how clear the color should be (0-255, where 0 is clear).

Returns:

an array of color ARGB integers.

getRasterHelper

protected SimpleColorGenerator.RasterHelper getRasterHelper(GridData gd)