gov.nasa.worldwindx.examples
Class TerrainIntersections

java.lang.Object
  gov.nasa.worldwindx.examples.ApplicationTemplate
      gov.nasa.worldwindx.examples.TerrainIntersections

public class TerrainIntersections
extends ApplicationTemplate

Shows how to compute terrain intersections using the highest resolution terrain data available from a globe's elevation model.

To generate and show intersections, Shift + LeftClick anywhere on the globe. The program forms a grid of locations around the selected location. The grid points are shown in yellow. It then determines whether a line between the selected location and each grid point intersects the terrain. If it does, the intersection nearest the selected location is shown in cyan and a line is drawn from the selected location to the intersection. If there is no intersection, a line is drawn from the selected location to the grid position.

If the highest resolution terrain is not available for the area around the selected location, it is retrieved from the elevation model's source, which is most likely a remote server. Since the high-res data must be retrieved and then loaded from the local disk cache, it will take some time to compute and show the intersections.

This example uses a Terrain object to perform the terrain retrieval, generation and intersection calculations.s

Nested Class Summary

static class

TerrainIntersections.AppFrame

Nested classes/interfaces inherited from class gov.nasa.worldwindx.examples.ApplicationTemplate

ApplicationTemplate.AppPanel

Field Summary

protected static int	GRID_DIMENSION The number of cells along each edge of the grid.
protected static Angle	GRID_RADIUS The width and height in degrees of the grid used to calculate intersections.
protected static int	NUM_THREADS
protected static Double	TARGET_RESOLUTION The desired terrain resolution to use in the intersection calculations.

Constructor Summary

TerrainIntersections()

Method Summary

static void

main(String[] args)

Methods inherited from class gov.nasa.worldwindx.examples.ApplicationTemplate

insertAfterPlacenames, insertBeforeCompass, insertBeforeLayerName, insertBeforePlacenames, start

Methods inherited from class java.lang.Object

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

Field Detail

GRID_DIMENSION

protected static final int GRID_DIMENSION

The number of cells along each edge of the grid.

See Also:

Constant Field Values

GRID_RADIUS

protected static final Angle GRID_RADIUS

The width and height in degrees of the grid used to calculate intersections.

NUM_THREADS

protected static final int NUM_THREADS

See Also:

Constant Field Values

TARGET_RESOLUTION

protected static final Double TARGET_RESOLUTION

The desired terrain resolution to use in the intersection calculations.

Constructor Detail

TerrainIntersections

public TerrainIntersections()

Method Detail

main

public static void main(String[] args)