Package gaiasky.util.math

Class Intersectord

java.lang.Object

gaiasky.util.math.Intersectord

public class Intersectord
extends java.lang.Object

Constructor Summary

Constructors

Constructor	Description
Intersectord()

Method Summary

Modifier and Type	Method	Description
static boolean	checkIntersectRaySpehre(double px, double py, double pz, double vx, double vy, double vz, double cx, double cy, double cz, double sphereRadius)
static boolean	checkIntersectRaySpehre(com.badlogic.gdx.math.Vector3 linePoint0, com.badlogic.gdx.math.Vector3 linePoint1, Vector3d sphereCenter, double sphereRadius)
static boolean	checkIntersectRaySpehre(Vector3d linePoint0, Vector3d linePoint1, Vector3d sphereCenter, double sphereRadius)
static boolean	checkIntersectSegmentSphere(Vector3d linePoint0, Vector3d linePoint1, Vector3d sphereCenter, double sphereRadius)
static double	distanceLinePoint(Vector3d x1, Vector3d x2, Vector3d x0)	Returns the shortest distance between the line defined by x1 and x2 and the point x0.
static double	distanceSegmentPoint(Vector3d a, Vector3d b, Vector3d v)	Calculates the euclidean distance from a point to a line segment.
static boolean	intersectRayBoundsFast(Rayd ray, Vector3d center, Vector3d dimensions)	Quick check whether the given Ray and BoundingBoxd intersect.
static com.badlogic.gdx.utils.Array<Vector3d>	intersectRaySphere(Vector3d linePoint0, Vector3d linePoint1, Vector3d sphereCenter, double sphereRadius)
static com.badlogic.gdx.utils.Array<Vector3d>	intersectSegmentSphere(Vector3d linePoint0, Vector3d linePoint1, Vector3d sphereCenter, double sphereRadius)	TODO: Not working well due to aux vectors

Methods inherited from class java.lang.Object

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

Constructor Detail

Intersectord

public Intersectord()

Method Detail

intersectRayBoundsFast

public static boolean intersectRayBoundsFast(Rayd ray,
                                             Vector3d center,
                                             Vector3d dimensions)

Quick check whether the given Ray and BoundingBoxd intersect.

Parameters:

ray - The ray

center - The center of the bounding box

dimensions - The dimensions (width, height and depth) of the bounding box

Returns:

Whether the ray and the bounding box intersect.

checkIntersectRaySpehre

public static boolean checkIntersectRaySpehre(Vector3d linePoint0,
                                              Vector3d linePoint1,
                                              Vector3d sphereCenter,
                                              double sphereRadius)

checkIntersectRaySpehre

public static boolean checkIntersectRaySpehre(com.badlogic.gdx.math.Vector3 linePoint0,
                                              com.badlogic.gdx.math.Vector3 linePoint1,
                                              Vector3d sphereCenter,
                                              double sphereRadius)

checkIntersectRaySpehre

public static boolean checkIntersectRaySpehre(double px,
                                              double py,
                                              double pz,
                                              double vx,
                                              double vy,
                                              double vz,
                                              double cx,
                                              double cy,
                                              double cz,
                                              double sphereRadius)

intersectRaySphere

public static com.badlogic.gdx.utils.Array<Vector3d> intersectRaySphere(Vector3d linePoint0,
                                                                        Vector3d linePoint1,
                                                                        Vector3d sphereCenter,
                                                                        double sphereRadius)

checkIntersectSegmentSphere

public static boolean checkIntersectSegmentSphere(Vector3d linePoint0,
                                                  Vector3d linePoint1,
                                                  Vector3d sphereCenter,
                                                  double sphereRadius)

intersectSegmentSphere

public static com.badlogic.gdx.utils.Array<Vector3d> intersectSegmentSphere(Vector3d linePoint0,
                                                                            Vector3d linePoint1,
                                                                            Vector3d sphereCenter,
                                                                            double sphereRadius)

TODO: Not working well due to aux vectors

Parameters:

linePoint0 -

linePoint1 -

sphereCenter -

sphereRadius -

Returns:

distanceLinePoint

public static double distanceLinePoint(Vector3d x1,
                                       Vector3d x2,
                                       Vector3d x0)

Returns the shortest distance between the line defined by x1 and x2 and the point x0. See here.

Parameters:

x1 - Segment first point

x2 - Segment second point

x0 - Point to test

Returns:

The minimum distance between the line and the point

distanceSegmentPoint

public static double distanceSegmentPoint(Vector3d a,
                                          Vector3d b,
                                          Vector3d v)

Calculates the euclidean distance from a point to a line segment.

Parameters:

v - the point

a - start of line segment

b - end of line segment

Returns:

distance from v to line segment [a,b]