TerrainIntersections (NASA WorldWind)

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

Nested Classes
Modifier and Type Class Description

static class TerrainIntersections.AppFrame
- Nested classes/interfaces inherited from class gov.nasa.worldwindx.examples.ApplicationTemplate
  ApplicationTemplate.AppPanel

Field Summary

Fields
Modifier and Type	Field	Description
`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 java.lang.Double`	`TARGET_RESOLUTION`	The desired terrain resolution to use in the intersection calculations.

Constructor Summary

Constructors
Constructor Description

TerrainIntersections()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type Method Description

static void main(java.lang.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, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - GRID_RADIUS
```
protected static final Angle GRID_RADIUS
```
    The width and height in degrees of the grid used to calculate intersections.
  - GRID_DIMENSION
```
protected static final int GRID_DIMENSION
```
    The number of cells along each edge of the grid.
    
    See Also:
    
    Constant Field Values
  - TARGET_RESOLUTION
```
protected static final java.lang.Double TARGET_RESOLUTION
```
    The desired terrain resolution to use in the intersection calculations.
  - NUM_THREADS
```
protected static final int NUM_THREADS
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - TerrainIntersections
```
public TerrainIntersections()
```
- Method Detail
  - main
```
public static void main(java.lang.String[] args)
```