maspack.matrix
Class Point3d

java.lang.Object
  maspack.matrix.VectorObject
      maspack.matrix.Vector3d
          maspack.matrix.Point3d

All Implemented Interfaces:

java.io.Serializable

public class Point3d

extends Vector3d

A 3D spatial point. The only difference between a point and a vector is in the the way it is transformed by an affine transformation. In homogeneous coordinates, a point is assigned a 1 in for its fourth entry, so the affine transformation of a point takes the form
A p + b

See Also:

Serialized Form

Field Summary

Fields inherited from class maspack.matrix.Vector3d

x, y, z

Constructor Summary

Point3d()
Creates a Point3d and initializes it to zero.

Point3d(double[] values)
Creates a Point3d with the supplied element values.

Point3d(double x, double y, double z)
Creates a Point3d with the supplied element values.

Point3d(Vector3d v)
Creates a Point3d by copying a vector

Method Summary

void	inverseTransform(AffineTransform3dObject X) Applies an inverse affine transformation to this point, in place.
void	inverseTransform(AffineTransform3dObject X, Vector3d p1) Applies an inverse affine transformation to the point p1, and places the result in this vector.
void	transform(AffineTransform3dObject X) Applies an affine transformation to this point, in place.
void	transform(AffineTransform3dObject X, Vector3d p1) Applies an affine transformation to the point p1, and places the result in this point.

Methods inherited from class maspack.matrix.Vector3d

absolute, absolute, add, add, angle, combine, cross, cross, crossAdd, distance, distanceSquared, dot, epsilonEquals, equals, get, get, infinityNorm, interpolate, interpolate, inverseTransform, inverseTransform, maxAbsIndex, maxElement, minAbsIndex, minElement, mul, mulTranspose, negate, negate, norm, normalize, normalize, normSquared, oneNorm, perpendicular, scale, scale, scaleAdd, scaleAdd, set, set, set, set, setFromHomogeneous, setRandom, setRandom, setRandom, setZero, size, sort, sort, sortAbsolute, sub, sub, transform, transform

Methods inherited from class maspack.matrix.VectorObject

dot, epsilonEquals, equals, equals, get, isFixedSize, scan, set, setSize, toString, toString, toString

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Point3d

public Point3d()

Creates a Point3d and initializes it to zero.

Point3d

public Point3d(Vector3d v)

Creates a Point3d by copying a vector

Parameters:

v - vector to be copied

Point3d

public Point3d(double[] values)

Creates a Point3d with the supplied element values.

Parameters:

values - element values

Point3d

public Point3d(double x,
               double y,
               double z)

Creates a Point3d with the supplied element values.

Parameters:

x - first element

y - second element

z - third element

Method Detail

transform

public void transform(AffineTransform3dObject X)

Applies an affine transformation to this point, in place.

Overrides:

transform in class Vector3d

Parameters:

X - affine transformation

transform

public void transform(AffineTransform3dObject X,
                      Vector3d p1)

Applies an affine transformation to the point p1, and places the result in this point.

Overrides:

transform in class Vector3d

Parameters:

X - affine transformation

p1 - point to be transformed

inverseTransform

public void inverseTransform(AffineTransform3dObject X)

Applies an inverse affine transformation to this point, in place.

Overrides:

inverseTransform in class Vector3d

Parameters:

X - affine transformation

inverseTransform

public void inverseTransform(AffineTransform3dObject X,
                             Vector3d p1)

Applies an inverse affine transformation to the point p1, and places the result in this vector.

Overrides:

inverseTransform in class Vector3d

Parameters:

X - affine transformation

p1 - point to be transformed