edu.stanford.rsl.conrad.geometry.splines

Class BSpline

java.lang.Object

edu.stanford.rsl.conrad.geometry.AbstractShape

edu.stanford.rsl.conrad.geometry.AbstractCurve

edu.stanford.rsl.conrad.geometry.splines.BSpline

All Implemented Interfaces:

Transformable, java.io.Serializable

Direct Known Subclasses:

CUDABSpline, OpenCLUniformBSpline, UniformCubicBSpline

public class BSpline
extends AbstractCurve

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static float	BSPLINECOLLECTION
static float	SPLINE1DTO3D
static float	SPLINE2DTO3D
static float	SPLINE3DTO3D

Constructor Summary

Constructors

Constructor and Description
BSpline(java.util.ArrayList<PointND> controlPoints, double... uVector)
BSpline(java.util.ArrayList<PointND> controlPoints, int degree, double... uVector)
BSpline(java.util.ArrayList<PointND> controlPoints, SimpleVector knotVector) Constructor for a BSpline using ArbitraryPoints and a weight vector as SimpleVector

Method Summary

Methods

Modifier and Type	Method and Description
void	applyTransform(Transform t) Applies the Transform t to the object.
void	computeBounds() Computes the bounding box for the curve.
double	distance(double[] planeCoefficients, double u)
double	distance(double[] planeCoefficients, int i)
double	distanceFast(double[] plane, double u)
double[]	evalFast(double t)
PointND	evaluate(double u) Returns a point on the Curve at position u [0, 1];
float[]	getBinaryRepresentation() Rewrites the BSpline into a float representation:
PointND	getControlPoint(int i) Returns the i-th control point
java.util.ArrayList<PointND>	getControlPoints()
int	getDegree() Returns the degree of the spline.
int	getDimension() Returns the external dimension of the shape.
static float	getID(java.lang.String title)
double[]	getKnots()
double	getKnotVectorEntry(int i) Returns the i-th knot vector entry.
PointND[]	getRasterPoints(int number) Rasters the shape with a given number of points or less.
double	getWeight(double u, int i) Computes N iteratively.
java.util.ArrayList<PointND>	intersect(AbstractCurve other) Returns the intersection points between the curve and the shape.
boolean	isBounded() Returns true if the shape is of limited space
void	setControlPoints(java.util.ArrayList<PointND> controlPoints)
void	setKnots(double[] knots)

Methods inherited from class edu.stanford.rsl.conrad.geometry.AbstractCurve

evaluate, getInternalDimension

Methods inherited from class edu.stanford.rsl.conrad.geometry.AbstractShape

getHitsOnBoundingBox_slow, getHitsOnBoundingBox, getMax, getMin, getName, setName

Methods inherited from class java.lang.Object

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

Field Detail

BSPLINECOLLECTION

public static final float BSPLINECOLLECTION

See Also:

Constant Field Values

SPLINE1DTO3D

public static final float SPLINE1DTO3D

See Also:

Constant Field Values

SPLINE2DTO3D

public static final float SPLINE2DTO3D

See Also:

Constant Field Values

SPLINE3DTO3D

public static final float SPLINE3DTO3D

See Also:

Constant Field Values

Constructor Detail

BSpline

public BSpline(java.util.ArrayList<PointND> controlPoints,
       double... uVector)

BSpline

public BSpline(java.util.ArrayList<PointND> controlPoints,
       int degree,
       double... uVector)

BSpline

public BSpline(java.util.ArrayList<PointND> controlPoints,
       SimpleVector knotVector)

Constructor for a BSpline using ArbitraryPoints and a weight vector as SimpleVector

Parameters:

controlPoints - the control points

knotVector - the weight vector

Method Detail

evalFast

public double[] evalFast(double t)

evaluate

public PointND evaluate(double u)

Description copied from class: AbstractCurve

Returns a point on the Curve at position u [0, 1];

Specified by:

evaluate in class AbstractCurve

Parameters:

u - the internal one dimensional position

Returns:

the curve point

getDimension

public int getDimension()

Description copied from class: AbstractShape

Returns the external dimension of the shape.

Specified by:

getDimension in class AbstractShape

Returns:

the dimension

getWeight

public double getWeight(double u,
               int i)

Computes N iteratively.

Parameters:

u - the point on the curve

i - the control point

Returns:

the weight

computeBounds

public void computeBounds()

Computes the bounding box for the curve.

getControlPoint

public PointND getControlPoint(int i)

Returns the i-th control point

Parameters:

i - the index

Returns:

the control point

getKnotVectorEntry

public double getKnotVectorEntry(int i)

Returns the i-th knot vector entry.

Parameters:

i -

Returns:

the knot vector entry

getDegree

public int getDegree()

Returns the degree of the spline.

Returns:

the degree

intersect

public java.util.ArrayList<PointND> intersect(AbstractCurve other)

Description copied from class: AbstractShape

Returns the intersection points between the curve and the shape. Returns null, if the intersection is empty.

Specified by:

intersect in class AbstractShape

Returns:

the intersection points.

isBounded

public boolean isBounded()

Description copied from class: AbstractShape

Returns true if the shape is of limited space

Specified by:

isBounded in class AbstractShape

Returns:

Boundedness of this shape.

distance

public double distance(double[] planeCoefficients,
              double u)

distance

public double distance(double[] planeCoefficients,
              int i)

distanceFast

public double distanceFast(double[] plane,
                  double u)

applyTransform

public void applyTransform(Transform t)

Description copied from interface: Transformable

Applies the Transform t to the object.

Specified by:

applyTransform in interface Transformable

Specified by:

applyTransform in class AbstractShape

Parameters:

t - the transform to apply to the object.

getRasterPoints

public PointND[] getRasterPoints(int number)

Description copied from class: AbstractShape

Rasters the shape with a given number of points or less. If the shape is not bounded null is returned.

Specified by:

getRasterPoints in class AbstractShape

Parameters:

number - the number of points

Returns:

the raster points

getID

public static float getID(java.lang.String title)

getBinaryRepresentation

public float[] getBinaryRepresentation()

Rewrites the BSpline into a float representation:

 type
 total size
 degree
 # of entries in knot vector
 # of control points
 knovector entries (1 float value)
 control points (3 float values: x,y,z)
 

Returns:

the binary represenation for use with openCL

setKnots

public void setKnots(double[] knots)

getKnots

public double[] getKnots()

setControlPoints

public void setControlPoints(java.util.ArrayList<PointND> controlPoints)

Parameters:

controlPoints - the controlPoints to set

getControlPoints

public java.util.ArrayList<PointND> getControlPoints()

Returns:

the controlPoints