You visualize density plots of vector data with the TLspShapeLayerBuilder in combination with these ALspDensityStyle instances:
-
TLspDensityPointStylefor point data -
TLspDensityLineStylefor line data -
TLspDensityFillStylefor polygon data
The following example visualizes a density plot of some point data:
TLspDensityPointStyle densityPointStyle =
TLspDensityPointStyle.newBuilder()
.pixelSize(10)
.build();
TLspLayer layer =
TLspShapeLayerBuilder.newBuilder()
.model(aModel)
.bodyStyles(TLspPaintState.REGULAR, densityPointStyle)
.build();resulting in
In this example, we only adjusted the pixelSize on the builder.
Consult the Javadoc to discover the other customization options.
|
It is not possible to submit a mix of density styles and regular styles. Doing so will result in undefined behavior. |
Changing the color mapping
To change the color mapping, submit a
TLspIndexColorModelStyle
along with the density styles:
TLspDensityPointStyle densityPointStyle =
TLspDensityPointStyle.newBuilder()
.pixelSize(10)
.build();
//Create an java.awt.image.IndexColorModel
//Here we use the TLcdIndexColorModel class based on a TLcdColorMap,
//but any IndexColorModel will do
TLcdColorMap colorMap = new TLcdColorMap(new TLcdInterval(0, 255),
new double[]{0.0, 10.0},
new Color[]{
new Color(0, 155, 236),
new Color(255, 255, 255)
});
TLspIndexColorModelStyle indexColorModelStyle =
TLspIndexColorModelStyle.newBuilder()
.indexColorModel(new TLcdIndexColorModel(8, colorMap))
.build();
//Specify both the TLspDensityPointStyle and TLspIndexColorModelStyle
TLspLayer layer =
TLspShapeLayerBuilder.newBuilder()
.model(aModel)
.bodyStyles(TLspPaintState.REGULAR, densityPointStyle, indexColorModelStyle)
.build();resulting in:
