gov.nasa.worldwind.util

Class RayCastingSupport

java.lang.Object

gov.nasa.worldwind.util.RayCastingSupport

public class RayCastingSupport
extends Object

Contains methods to resolve ray intersections with the terrain.

Constructor Summary

Constructors

Constructor and Description
RayCastingSupport()

Method Summary

Modifier and Type	Method and Description
static Position	intersectRayWithTerrain(Globe globe, Vec4 origin, Vec4 direction) Compute the intersection Position of the globe terrain with the ray starting at origin in the given direction.
static Position	intersectRayWithTerrain(Globe globe, Vec4 origin, Vec4 direction, double sampleLength, double precision) Compute the intersection Position of the globe terrain with the ray starting at origin in the given direction.
static Vec4	intersectSegmentWithTerrain(Globe globe, Vec4 p1, Vec4 p2) Compute the intersection Vec4 point of the globe terrain with a line segment defined between two points.
static Vec4	intersectSegmentWithTerrain(Globe globe, Vec4 p1, Vec4 p2, double sampleLength, double precision) Compute the intersection Vec4 point of the globe terrain with the a segment defined between two points.

Methods inherited from class java.lang.Object

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

Constructor Detail

RayCastingSupport

public RayCastingSupport()

Method Detail

intersectRayWithTerrain

public static Position intersectRayWithTerrain(Globe globe,
                                               Vec4 origin,
                                               Vec4 direction)

Compute the intersection Position of the globe terrain with the ray starting at origin in the given direction. Uses default sample length and result precision.

Parameters:

globe - the globe to intersect with.

origin - origin of the ray.

direction - direction of the ray.

Returns:

the Position found or null.

intersectRayWithTerrain

public static Position intersectRayWithTerrain(Globe globe,
                                               Vec4 origin,
                                               Vec4 direction,
                                               double sampleLength,
                                               double precision)

Compute the intersection Position of the globe terrain with the ray starting at origin in the given direction. Uses the given sample length and result precision.

Parameters:

globe - the globe to intersect with.

origin - origin of the ray.

direction - direction of the ray.

sampleLength - the sampling step length in meters.

precision - the maximum sampling error in meters.

Returns:

the Position found or null.

intersectSegmentWithTerrain

public static Vec4 intersectSegmentWithTerrain(Globe globe,
                                               Vec4 p1,
                                               Vec4 p2)

Compute the intersection Vec4 point of the globe terrain with a line segment defined between two points. Uses the default sample length and result precision.

Parameters:

globe - the globe to intersect with.

p1 - segment start point.

p2 - segment end point.

Returns:

the Vec4 point found or null.

intersectSegmentWithTerrain

public static Vec4 intersectSegmentWithTerrain(Globe globe,
                                               Vec4 p1,
                                               Vec4 p2,
                                               double sampleLength,
                                               double precision)

Compute the intersection Vec4 point of the globe terrain with the a segment defined between two points. Uses the given sample length and result precision.

Parameters:

globe - the globe to intersect with.

p1 - segment start point.

p2 - segment end point.

sampleLength - the sampling step length in meters.

precision - the maximum sampling error in meters.

Returns:

the Vec4 point found or null.