medusa.georgios.color_factory

Class CubicBezierCurve3f

java.lang.Object

medusa.georgios.color_factory.AbstractCurve3f

medusa.georgios.color_factory.CubicBezierCurve3f

public final class CubicBezierCurve3f
extends AbstractCurve3f

Provides an interpolation mechanism using cubic bezier segments to compose a curve. The appropriate segments are not pre-calculated. Instead they are computed on demand. Simply plug in a vector of coordinates using setCoordinate( Vector coordinates ) . The curve is parameterized from 0 to 1. Provide additional parameters to control the curve. The members prePoint and postPoint are used for computing C1 continuous transitions between neighboring segments. You can explicitly set the initial and final tangent to force the curves tangent at parameter 0 and 1. Note that the tangent setting is dominant over the pre- and post-point setting.

Field Summary

Fields

Modifier and Type	Field and Description
Tuple3f	finalTangent Plug-in for a the final tangent
Tuple3f	initialTangent Plug-in for a the initial tangent
Tuple3f	postPoint Plug-in for a point that is appropriate for extrapolation
Tuple3f	prePoint Plug-in for a point that is appropriate for extrapolation
float	tangentScale Scale factor for the tangents computed for C1 continuity

Constructor Summary

Constructors

Constructor and Description
CubicBezierCurve3f()

Method Summary

Modifier and Type	Method and Description
Point3f	computePoint(float parameter) Computes the point coordinate of the curve at parameter parameter .
Vector3f	computeTangent(float parameter) Computes the tangent of the curve at parameter parameter .
void	setTangents(java.util.ArrayList tangents) Sets the tangents vector of the cubic bezier curve.

Methods inherited from class medusa.georgios.color_factory.AbstractCurve3f

getCoordinates, isUseDefaultDomain, mapCurveParameterToSegmentIndex, mapCurveParameterToSegmentParamter, setCoordinates, setDomain, setUseDefaultDomain

Methods inherited from class java.lang.Object

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

Field Detail

prePoint

public Tuple3f prePoint

Plug-in for a point that is appropriate for extrapolation

postPoint

public Tuple3f postPoint

Plug-in for a point that is appropriate for extrapolation

initialTangent

public Tuple3f initialTangent

Plug-in for a the initial tangent

finalTangent

public Tuple3f finalTangent

Plug-in for a the final tangent

tangentScale

public float tangentScale

Scale factor for the tangents computed for C1 continuity

Constructor Detail

CubicBezierCurve3f

public CubicBezierCurve3f()

Method Detail

setTangents

public void setTangents(java.util.ArrayList tangents)

Sets the tangents vector of the cubic bezier curve. Note that the number of tangents must be at least the same as the numbers of points provided to the curve.

Parameters:

tangents - The new tangents value.

computeTangent

public final Vector3f computeTangent(float parameter)

Computes the tangent of the curve at parameter parameter .

Specified by:

computeTangent in class AbstractCurve3f

Parameters:

parameter - for the computation.

Returns:

Vector3f - the computed tangent.

computePoint

public final Point3f computePoint(float parameter)

Computes the point coordinate of the curve at parameter parameter .

Specified by:

computePoint in class AbstractCurve3f

Parameters:

parameter - for the computation.

Returns:

Point3f - the computed coordinate.