org.apache.lucene.spatial3d.geom

## Class Plane

• Direct Known Subclasses:
SidedPlane

```public class Plane
extends Vector```
We know about three kinds of planes. First kind: general plain through two points and origin Second kind: horizontal plane at specified height. Third kind: vertical plane with specified x and y value, through origin.
WARNING: This API is experimental and might change in incompatible ways in the next release.
• ### Field Summary

Fields
Modifier and Type Field and Description
`double` `D`
Ax + By + Cz + D = 0
`static Membership[]` `NO_BOUNDS`
An array with no bounds in it
`static GeoPoint[]` `NO_POINTS`
An array with no points in it
`static Plane` `normalXPlane`
A vertical plane normal to the X axis
`static Plane` `normalYPlane`
A vertical plane normal to the Y axis
`static Plane` `normalZPlane`
A vertical plane normal to the Z axis
• ### Fields inherited from class org.apache.lucene.spatial3d.geom.Vector

`MINIMUM_ANGULAR_RESOLUTION, MINIMUM_RESOLUTION, MINIMUM_RESOLUTION_CUBED, MINIMUM_RESOLUTION_SQUARED, x, y, z`
• ### Constructor Summary

Constructors
Constructor and Description
```Plane(double x, double y)```
Construct a vertical plane through a specified x, y and origin.
```Plane(double A, double B, double C, double D)```
Construct a plane with all four coefficients defined.
```Plane(Plane basePlane, boolean above)```
Construct a plane that is parallel to the one provided, but which is just barely numerically distinguishable from it, in the direction desired.
```Plane(PlanetModel planetModel, double sinLat)```
Construct a horizontal plane at a specified Z.
```Plane(Vector v, double D)```
Construct a plane with a specific vector, and D offset from origin.
```Plane(Vector A, double BX, double BY, double BZ)```
Construct a plane through two points and origin.
```Plane(Vector A, Vector B)```
Construct a plane through two points and origin.
• ### Method Summary

All Methods
Modifier and Type Method and Description
`double` ```arcDistance(PlanetModel planetModel, double x, double y, double z, Membership... bounds)```
Compute arc distance from plane to a vector.
`double` ```arcDistance(PlanetModel planetModel, GeoPoint v, Membership... bounds)```
Compute arc distance from plane to a vector expressed with a `GeoPoint`.
`static boolean` ```arePointsCoplanar(GeoPoint A, GeoPoint B, GeoPoint C)```
Checks if three points are coplanar in any of the three planes they can describe.
`static Plane` ```constructNormalizedXPlane(double y, double z, double DValue)```
Construct a normalized plane through a y-z point and parallel to the X axis.
`static Plane` `constructNormalizedXPlane(Vector... planePoints)`
Construct the most accurate normalized plane through an y-z point and including the X axis.
`static Plane` ```constructNormalizedYPlane(double x, double z, double DValue)```
Construct a normalized plane through an x-z point and parallel to the Y axis.
`static Plane` `constructNormalizedYPlane(Vector... planePoints)`
Construct the most accurate normalized plane through an x-z point and including the Y axis.
`static Plane` ```constructNormalizedZPlane(double x, double y)```
Construct a normalized plane through an x-y point and including the Z axis.
`static Plane` `constructNormalizedZPlane(Vector... planePoints)`
Construct the most accurate normalized plane through an x-y point and including the Z axis.
`boolean` ```crosses(PlanetModel planetModel, Plane q, GeoPoint[] notablePoints, GeoPoint[] moreNotablePoints, Membership[] bounds, Membership... moreBounds)```
Determine whether the plane crosses another plane within the bounds provided.
`boolean` `equals(Object o)`
`double` ```evaluate(double x, double y, double z)```
Evaluate the plane equation for a given point, as represented by a vector.
`double` `evaluate(Vector v)`
Evaluate the plane equation for a given point, as represented by a vector.
`boolean` ```evaluateIsZero(double x, double y, double z)```
Evaluate the plane equation for a given point, as represented by a vector.
`boolean` `evaluateIsZero(Vector v)`
Evaluate the plane equation for a given point, as represented by a vector.
`GeoPoint[]` ```findArcDistancePoints(PlanetModel planetModel, double arcDistanceValue, GeoPoint startPoint, Membership... bounds)```
Locate a point that is within the specified bounds and on the specified plane, that has an arcDistance as specified from the startPoint.
`GeoPoint[]` ```findCrossings(PlanetModel planetModel, Plane q, Membership... bounds)```
Find the points between two planes, where one plane crosses the other, given a set of bounds.
`protected GeoPoint[]` ```findCrossings(PlanetModel planetModel, Plane q, Membership[] bounds, Membership[] moreBounds)```
Find the points between two planes, where one plane crosses the other, given a set of bounds.
`protected void` ```findIntersectionBounds(PlanetModel planetModel, Bounds boundsInfo, Plane q, Membership... bounds)```
Record intersection points for planes with error bounds.
`GeoPoint[]` ```findIntersections(PlanetModel planetModel, Plane q, Membership... bounds)```
Find the intersection points between two planes, given a set of bounds.
`protected GeoPoint[]` ```findIntersections(PlanetModel planetModel, Plane q, Membership[] bounds, Membership[] moreBounds)```
Find the intersection points between two planes, given a set of bounds.
`GeoPoint` ```getSampleIntersectionPoint(PlanetModel planetModel, Plane q)```
Find a sample point on the intersection between two planes and the world.
`int` `hashCode()`
`GeoPoint[]` ```interpolate(PlanetModel planetModel, GeoPoint start, GeoPoint end, double[] proportions)```
Find points on the boundary of the intersection of a plane and the unit sphere, given a starting point, and ending point, and a list of proportions of the arc (e.g.
`boolean` ```intersects(PlanetModel planetModel, Plane q, GeoPoint[] notablePoints, GeoPoint[] moreNotablePoints, Membership[] bounds, Membership... moreBounds)```
Determine whether the plane intersects another plane within the bounds provided.
`boolean` `isFunctionallyIdentical(Plane p)`
Returns true if this plane and the other plane are functionally identical within the margin of error.
`boolean` `isNumericallyIdentical(Plane p)`
Returns true if this plane and the other plane are identical within the margin of error.
`double` ```linearDistance(PlanetModel planetModel, double x, double y, double z, Membership... bounds)```
Compute linear distance from plane to a vector.
`double` ```linearDistance(PlanetModel planetModel, GeoPoint v, Membership... bounds)```
Compute linear distance from plane to a vector.
`double` ```linearDistanceSquared(PlanetModel planetModel, double x, double y, double z, Membership... bounds)```
Compute linear distance squared from plane to a vector.
`double` ```linearDistanceSquared(PlanetModel planetModel, GeoPoint v, Membership... bounds)```
Compute linear distance squared from plane to a vector.
`protected static Vector` ```modify(GeoPoint start, double transX, double transY, double transZ, double sinRA, double cosRA, double sinHA, double cosHA)```
Modify a point to produce a vector in translated/rotated space.
`double` ```normalDistance(double x, double y, double z, Membership... bounds)```
Compute normal distance from plane to a vector.
`double` ```normalDistance(Vector v, Membership... bounds)```
Compute normal distance from plane to a vector.
`double` ```normalDistanceSquared(double x, double y, double z, Membership... bounds)```
Compute normal distance squared from plane to a vector.
`double` ```normalDistanceSquared(Vector v, Membership... bounds)```
Compute normal distance squared from plane to a vector.
`Plane` `normalize()`
Build a normalized plane, so that the vector is normalized.
`void` ```recordBounds(PlanetModel planetModel, LatLonBounds boundsInfo, Membership... bounds)```
Accumulate bounds information for this plane, intersected with the unit sphere.
`void` ```recordBounds(PlanetModel planetModel, LatLonBounds boundsInfo, Plane p, Membership... bounds)```
Accumulate bounds information for this plane, intersected with another plane and the world.
`void` ```recordBounds(PlanetModel planetModel, XYZBounds boundsInfo, Membership... bounds)```
Accumulate (x,y,z) bounds information for this plane, intersected with the unit sphere.
`void` ```recordBounds(PlanetModel planetModel, XYZBounds boundsInfo, Plane p, Membership... bounds)```
Accumulate (x,y,z) bounds information for this plane, intersected with another and the world.
`protected static GeoPoint` ```reverseModify(PlanetModel planetModel, Vector point, double transX, double transY, double transZ, double sinRA, double cosRA, double sinHA, double cosHA)```
Reverse modify a point to produce a GeoPoint in normal space.
`String` `toString()`
• ### Methods inherited from class org.apache.lucene.spatial3d.geom.Vector

`crossProductEvaluateIsZero, dotProduct, dotProduct, isNumericallyIdentical, isNumericallyIdentical, isParallel, isParallel, isWithin, linearDistance, linearDistance, linearDistanceSquared, linearDistanceSquared, magnitude, magnitude, normalDistance, normalDistance, normalDistanceSquared, normalDistanceSquared, rotateXY, rotateXY, rotateXZ, rotateXZ, rotateZY, rotateZY, translate`
• ### Methods inherited from class java.lang.Object

`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`
• ### Field Detail

• #### NO_POINTS

`public static final GeoPoint[] NO_POINTS`
An array with no points in it
• #### NO_BOUNDS

`public static final Membership[] NO_BOUNDS`
An array with no bounds in it
• #### normalYPlane

`public static final Plane normalYPlane`
A vertical plane normal to the Y axis
• #### normalXPlane

`public static final Plane normalXPlane`
A vertical plane normal to the X axis
• #### normalZPlane

`public static final Plane normalZPlane`
A vertical plane normal to the Z axis
• #### D

`public final double D`
Ax + By + Cz + D = 0
• ### Constructor Detail

• #### Plane

```public Plane(double A,
double B,
double C,
double D)```
Construct a plane with all four coefficients defined.
Parameters:
`A` - is A
`B` - is B
`C` - is C
`D` - is D
• #### Plane

```public Plane(Vector A,
double BX,
double BY,
double BZ)```
Construct a plane through two points and origin.
Parameters:
`A` - is the first point (origin based).
`BX` - is the second point X (origin based).
`BY` - is the second point Y (origin based).
`BZ` - is the second point Z (origin based).
• #### Plane

```public Plane(Vector A,
Vector B)```
Construct a plane through two points and origin.
Parameters:
`A` - is the first point (origin based).
`B` - is the second point (origin based).
• #### Plane

```public Plane(PlanetModel planetModel,
double sinLat)```
Construct a horizontal plane at a specified Z.
Parameters:
`planetModel` - is the planet model.
`sinLat` - is the sin(latitude).
• #### Plane

```public Plane(double x,
double y)```
Construct a vertical plane through a specified x, y and origin.
Parameters:
`x` - is the specified x value.
`y` - is the specified y value.
• #### Plane

```public Plane(Vector v,
double D)```
Construct a plane with a specific vector, and D offset from origin.
Parameters:
`v` - is the normal vector.
`D` - is the D offset from the origin.
• #### Plane

```public Plane(Plane basePlane,
boolean above)```
Construct a plane that is parallel to the one provided, but which is just barely numerically distinguishable from it, in the direction desired.
Parameters:
`basePlane` - is the starting plane.
`above` - is set to true if the desired plane is in the positive direction from the base plane, or false in the negative direction.
• ### Method Detail

• #### constructNormalizedZPlane

`public static Plane constructNormalizedZPlane(Vector... planePoints)`
Construct the most accurate normalized plane through an x-y point and including the Z axis. If none of the points can determine the plane, return null.
Parameters:
`planePoints` - is a set of points to choose from. The best one for constructing the most precise plane is picked.
Returns:
the plane
• #### constructNormalizedYPlane

`public static Plane constructNormalizedYPlane(Vector... planePoints)`
Construct the most accurate normalized plane through an x-z point and including the Y axis. If none of the points can determine the plane, return null.
Parameters:
`planePoints` - is a set of points to choose from. The best one for constructing the most precise plane is picked.
Returns:
the plane
• #### constructNormalizedXPlane

`public static Plane constructNormalizedXPlane(Vector... planePoints)`
Construct the most accurate normalized plane through an y-z point and including the X axis. If none of the points can determine the plane, return null.
Parameters:
`planePoints` - is a set of points to choose from. The best one for constructing the most precise plane is picked.
Returns:
the plane
• #### constructNormalizedZPlane

```public static Plane constructNormalizedZPlane(double x,
double y)```
Construct a normalized plane through an x-y point and including the Z axis. If the x-y point is at (0,0), return null.
Parameters:
`x` - is the x value.
`y` - is the y value.
Returns:
a plane passing through the Z axis and (x,y,0).
• #### constructNormalizedYPlane

```public static Plane constructNormalizedYPlane(double x,
double z,
double DValue)```
Construct a normalized plane through an x-z point and parallel to the Y axis. If the x-z point is at (0,0), return null.
Parameters:
`x` - is the x value.
`z` - is the z value.
`DValue` - is the offset from the origin for the plane.
Returns:
a plane parallel to the Y axis and perpendicular to the x and z values given.
• #### constructNormalizedXPlane

```public static Plane constructNormalizedXPlane(double y,
double z,
double DValue)```
Construct a normalized plane through a y-z point and parallel to the X axis. If the y-z point is at (0,0), return null.
Parameters:
`y` - is the y value.
`z` - is the z value.
`DValue` - is the offset from the origin for the plane.
Returns:
a plane parallel to the X axis and perpendicular to the y and z values given.
• #### evaluate

`public double evaluate(Vector v)`
Evaluate the plane equation for a given point, as represented by a vector.
Parameters:
`v` - is the vector.
Returns:
the result of the evaluation.
• #### evaluate

```public double evaluate(double x,
double y,
double z)```
Evaluate the plane equation for a given point, as represented by a vector.
Parameters:
`x` - is the x value.
`y` - is the y value.
`z` - is the z value.
Returns:
the result of the evaluation.
• #### evaluateIsZero

`public boolean evaluateIsZero(Vector v)`
Evaluate the plane equation for a given point, as represented by a vector.
Parameters:
`v` - is the vector.
Returns:
true if the result is on the plane.
• #### evaluateIsZero

```public boolean evaluateIsZero(double x,
double y,
double z)```
Evaluate the plane equation for a given point, as represented by a vector.
Parameters:
`x` - is the x value.
`y` - is the y value.
`z` - is the z value.
Returns:
true if the result is on the plane.
• #### normalize

`public Plane normalize()`
Build a normalized plane, so that the vector is normalized.
Overrides:
`normalize` in class `Vector`
Returns:
the normalized plane object, or null if the plane is indeterminate.
• #### arcDistance

```public double arcDistance(PlanetModel planetModel,
double x,
double y,
double z,
Membership... bounds)```
Compute arc distance from plane to a vector.
Parameters:
`planetModel` - is the planet model.
`x` - is the x vector value.
`y` - is the y vector value.
`z` - is the z vector value.
`bounds` - are the bounds which constrain the intersection point.
Returns:
the arc distance.
• #### normalDistance

```public double normalDistance(Vector v,
Membership... bounds)```
Compute normal distance from plane to a vector.
Parameters:
`v` - is the vector.
`bounds` - are the bounds which constrain the intersection point.
Returns:
the normal distance.
• #### normalDistance

```public double normalDistance(double x,
double y,
double z,
Membership... bounds)```
Compute normal distance from plane to a vector.
Parameters:
`x` - is the vector x.
`y` - is the vector y.
`z` - is the vector z.
`bounds` - are the bounds which constrain the intersection point.
Returns:
the normal distance.
• #### normalDistanceSquared

```public double normalDistanceSquared(Vector v,
Membership... bounds)```
Compute normal distance squared from plane to a vector.
Parameters:
`v` - is the vector.
`bounds` - are the bounds which constrain the intersection point.
Returns:
the normal distance squared.
• #### normalDistanceSquared

```public double normalDistanceSquared(double x,
double y,
double z,
Membership... bounds)```
Compute normal distance squared from plane to a vector.
Parameters:
`x` - is the vector x.
`y` - is the vector y.
`z` - is the vector z.
`bounds` - are the bounds which constrain the intersection point.
Returns:
the normal distance squared.
• #### linearDistance

```public double linearDistance(PlanetModel planetModel,
GeoPoint v,
Membership... bounds)```
Compute linear distance from plane to a vector. This is defined as the distance from the given point to the nearest intersection of this plane with the planet surface.
Parameters:
`planetModel` - is the planet model.
`v` - is the point.
`bounds` - are the bounds which constrain the intersection point.
Returns:
the linear distance.
• #### linearDistance

```public double linearDistance(PlanetModel planetModel,
double x,
double y,
double z,
Membership... bounds)```
Compute linear distance from plane to a vector. This is defined as the distance from the given point to the nearest intersection of this plane with the planet surface.
Parameters:
`planetModel` - is the planet model.
`x` - is the vector x.
`y` - is the vector y.
`z` - is the vector z.
`bounds` - are the bounds which constrain the intersection point.
Returns:
the linear distance.
• #### linearDistanceSquared

```public double linearDistanceSquared(PlanetModel planetModel,
GeoPoint v,
Membership... bounds)```
Compute linear distance squared from plane to a vector. This is defined as the distance from the given point to the nearest intersection of this plane with the planet surface.
Parameters:
`planetModel` - is the planet model.
`v` - is the point.
`bounds` - are the bounds which constrain the intersection point.
Returns:
the linear distance squared.
• #### linearDistanceSquared

```public double linearDistanceSquared(PlanetModel planetModel,
double x,
double y,
double z,
Membership... bounds)```
Compute linear distance squared from plane to a vector. This is defined as the distance from the given point to the nearest intersection of this plane with the planet surface.
Parameters:
`planetModel` - is the planet model.
`x` - is the vector x.
`y` - is the vector y.
`z` - is the vector z.
`bounds` - are the bounds which constrain the intersection point.
Returns:
the linear distance squared.
• #### interpolate

```public GeoPoint[] interpolate(PlanetModel planetModel,
GeoPoint start,
GeoPoint end,
double[] proportions)```
Find points on the boundary of the intersection of a plane and the unit sphere, given a starting point, and ending point, and a list of proportions of the arc (e.g. 0.25, 0.5, 0.75). The angle between the starting point and ending point is assumed to be less than pi.
Parameters:
`planetModel` - is the planet model.
`start` - is the start point.
`end` - is the end point.
`proportions` - is an array of fractional proportions measured between start and end.
Returns:
an array of points corresponding to the proportions passed in.
• #### modify

```protected static Vector modify(GeoPoint start,
double transX,
double transY,
double transZ,
double sinRA,
double cosRA,
double sinHA,
double cosHA)```
Modify a point to produce a vector in translated/rotated space.
Parameters:
`start` - is the start point.
`transX` - is the translation x value.
`transY` - is the translation y value.
`transZ` - is the translation z value.
`sinRA` - is the sine of the ascension angle.
`cosRA` - is the cosine of the ascension angle.
`sinHA` - is the sine of the height angle.
`cosHA` - is the cosine of the height angle.
Returns:
the modified point.
• #### reverseModify

```protected static GeoPoint reverseModify(PlanetModel planetModel,
Vector point,
double transX,
double transY,
double transZ,
double sinRA,
double cosRA,
double sinHA,
double cosHA)```
Reverse modify a point to produce a GeoPoint in normal space.
Parameters:
`planetModel` - is the planet model.
`point` - is the translated point.
`transX` - is the translation x value.
`transY` - is the translation y value.
`transZ` - is the translation z value.
`sinRA` - is the sine of the ascension angle.
`cosRA` - is the cosine of the ascension angle.
`sinHA` - is the sine of the height angle.
`cosHA` - is the cosine of the height angle.
Returns:
the original point.
• #### findIntersections

```public GeoPoint[] findIntersections(PlanetModel planetModel,
Plane q,
Membership... bounds)```
Find the intersection points between two planes, given a set of bounds.
Parameters:
`planetModel` - is the planet model.
`q` - is the plane to intersect with.
`bounds` - are the bounds to consider to determine legal intersection points.
Returns:
the set of legal intersection points, or null if the planes are numerically identical.
• #### findCrossings

```public GeoPoint[] findCrossings(PlanetModel planetModel,
Plane q,
Membership... bounds)```
Find the points between two planes, where one plane crosses the other, given a set of bounds. Crossing is not just intersection; the planes cannot touch at just one point on the ellipsoid, but must cross at two.
Parameters:
`planetModel` - is the planet model.
`q` - is the plane to intersect with.
`bounds` - are the bounds to consider to determine legal intersection points.
Returns:
the set of legal crossing points, or null if the planes are numerically identical.
• #### arePointsCoplanar

```public static boolean arePointsCoplanar(GeoPoint A,
GeoPoint B,
GeoPoint C)```
Checks if three points are coplanar in any of the three planes they can describe. The planes are all assumed to go through the origin.
Parameters:
`A` - The first point.
`B` - The second point.
`C` - The third point
Returns:
true if provided points are coplanar in any of the three planes they can describe.
• #### findIntersections

```protected GeoPoint[] findIntersections(PlanetModel planetModel,
Plane q,
Membership[] bounds,
Membership[] moreBounds)```
Find the intersection points between two planes, given a set of bounds.
Parameters:
`planetModel` - is the planet model to use in finding points.
`q` - is the plane to intersect with.
`bounds` - is the set of bounds.
`moreBounds` - is another set of bounds.
Returns:
the intersection point(s) on the unit sphere, if there are any.
• #### findCrossings

```protected GeoPoint[] findCrossings(PlanetModel planetModel,
Plane q,
Membership[] bounds,
Membership[] moreBounds)```
Find the points between two planes, where one plane crosses the other, given a set of bounds. Crossing is not just intersection; the planes cannot touch at just one point on the ellipsoid, but must cross at two.
Parameters:
`planetModel` - is the planet model to use in finding points.
`q` - is the plane to intersect with.
`bounds` - is the set of bounds.
`moreBounds` - is another set of bounds.
Returns:
the intersection point(s) on the ellipsoid, if there are any.
• #### findIntersectionBounds

```protected void findIntersectionBounds(PlanetModel planetModel,
Bounds boundsInfo,
Plane q,
Membership... bounds)```
Record intersection points for planes with error bounds. This method calls the Bounds object with every intersection point it can find that matches the criteria. Each plane is considered to have two sides, one that is D + MINIMUM_RESOLUTION, and one that is D - MINIMUM_RESOLUTION. Both are examined and intersection points determined.
• #### recordBounds

```public void recordBounds(PlanetModel planetModel,
XYZBounds boundsInfo,
Plane p,
Membership... bounds)```
Accumulate (x,y,z) bounds information for this plane, intersected with another and the world. Updates min/max information using intersection points found. These include the error envelope for the planes (D +/- MINIMUM_RESOLUTION).
Parameters:
`planetModel` - is the planet model to use in determining bounds.
`boundsInfo` - is the xyz info to update with additional bounding information.
`p` - is the other plane.
`bounds` - are the surfaces delineating what's inside the shape.
• #### recordBounds

```public void recordBounds(PlanetModel planetModel,
XYZBounds boundsInfo,
Membership... bounds)```
Accumulate (x,y,z) bounds information for this plane, intersected with the unit sphere. Updates min/max information, using max/min points found within the specified bounds.
Parameters:
`planetModel` - is the planet model to use in determining bounds.
`boundsInfo` - is the xyz info to update with additional bounding information.
`bounds` - are the surfaces delineating what's inside the shape.
• #### recordBounds

```public void recordBounds(PlanetModel planetModel,
LatLonBounds boundsInfo,
Plane p,
Membership... bounds)```
Accumulate bounds information for this plane, intersected with another plane and the world. Updates both latitude and longitude information, using max/min points found within the specified bounds. Also takes into account the error envelope for all planes being intersected.
Parameters:
`planetModel` - is the planet model to use in determining bounds.
`boundsInfo` - is the lat/lon info to update with additional bounding information.
`p` - is the other plane.
`bounds` - are the surfaces delineating what's inside the shape.
• #### recordBounds

```public void recordBounds(PlanetModel planetModel,
LatLonBounds boundsInfo,
Membership... bounds)```
Accumulate bounds information for this plane, intersected with the unit sphere. Updates both latitude and longitude information, using max/min points found within the specified bounds.
Parameters:
`planetModel` - is the planet model to use in determining bounds.
`boundsInfo` - is the lat/lon info to update with additional bounding information.
`bounds` - are the surfaces delineating what's inside the shape.
• #### intersects

```public boolean intersects(PlanetModel planetModel,
Plane q,
GeoPoint[] notablePoints,
GeoPoint[] moreNotablePoints,
Membership[] bounds,
Membership... moreBounds)```
Determine whether the plane intersects another plane within the bounds provided.
Parameters:
`planetModel` - is the planet model to use in determining intersection.
`q` - is the other plane.
`notablePoints` - are points to look at to disambiguate cases when the two planes are identical.
`moreNotablePoints` - are additional points to look at to disambiguate cases when the two planes are identical.
`bounds` - is one part of the bounds.
`moreBounds` - are more bounds.
Returns:
true if there's an intersection.
• #### crosses

```public boolean crosses(PlanetModel planetModel,
Plane q,
GeoPoint[] notablePoints,
GeoPoint[] moreNotablePoints,
Membership[] bounds,
Membership... moreBounds)```
Determine whether the plane crosses another plane within the bounds provided. Crossing is defined as intersecting with the geo surface at two points.
Parameters:
`planetModel` - is the planet model to use in determining intersection.
`q` - is the other plane.
`notablePoints` - are points to look at to disambiguate cases when the two planes are identical.
`moreNotablePoints` - are additional points to look at to disambiguate cases when the two planes are identical.
`bounds` - is one part of the bounds.
`moreBounds` - are more bounds.
Returns:
true if there's a crossing.
• #### isFunctionallyIdentical

`public boolean isFunctionallyIdentical(Plane p)`
Returns true if this plane and the other plane are functionally identical within the margin of error. Functionally identical means that the planes are so close to parallel that many aspects of planar math, like intersections, no longer have answers to within the required precision.
Parameters:
`p` - is the plane to compare against.
Returns:
true if the planes are functionally identical.
• #### isNumericallyIdentical

`public boolean isNumericallyIdentical(Plane p)`
Returns true if this plane and the other plane are identical within the margin of error.
Parameters:
`p` - is the plane to compare against.
Returns:
true if the planes are numerically identical.
• #### findArcDistancePoints

```public GeoPoint[] findArcDistancePoints(PlanetModel planetModel,
double arcDistanceValue,
GeoPoint startPoint,
Membership... bounds)```
Locate a point that is within the specified bounds and on the specified plane, that has an arcDistance as specified from the startPoint.
Parameters:
`planetModel` - is the planet model.
`arcDistanceValue` - is the arc distance.
`startPoint` - is the starting point.
`bounds` - are the bounds.
Returns:
zero, one, or two points.
• #### getSampleIntersectionPoint

```public GeoPoint getSampleIntersectionPoint(PlanetModel planetModel,
Plane q)```
Find a sample point on the intersection between two planes and the world.
Parameters:
`planetModel` - is the planet model.
`q` - is the second plane to consider.
Returns:
a sample point that is on the intersection between the two planes and the world.
• #### toString

`public String toString()`
Overrides:
`toString` in class `Vector`
• #### equals

`public boolean equals(Object o)`
Overrides:
`equals` in class `Vector`
• #### hashCode

`public int hashCode()`
Overrides:
`hashCode` in class `Vector`