org.graphstream.ui.android_viewer.util

Class CubicCurve

java.lang.Object

org.graphstream.ui.android_viewer.util.CubicCurve

public class CubicCurve
extends java.lang.Object

Utility methods to deal with cubic Bézier curves.

Constructor Summary

Constructors

Constructor and Description
CubicCurve()

Method Summary

Modifier and Type	Method and Description
static double	derivative(double x0, double x1, double x2, double x3, double t) Derivative of a cubic Bézier curve according to control points `x0`, `x1`, `x2` and `x3` at parametric position `t` of the curve.
static org.graphstream.ui.geom.Point2	derivative(org.graphstream.ui.geom.Point2 p0, org.graphstream.ui.geom.Point2 p1, org.graphstream.ui.geom.Point2 p2, org.graphstream.ui.geom.Point3 p3, double t) Derivative point of a cubic Bézier curve according to control points `x0`, `x1`, `x2` and `x3` at parametric position `t` of the curve.
static org.graphstream.ui.geom.Point2	derivative(org.graphstream.ui.geom.Point2 p0, org.graphstream.ui.geom.Point2 p1, org.graphstream.ui.geom.Point2 p2, org.graphstream.ui.geom.Point3 p3, double t, org.graphstream.ui.geom.Point2 result) Store in `result` the derivative point of a cubic Bézier curve according to control points `x0`, `x1`, `x2` and `x3` at parametric position `t` of the curve.
static double	eval(double x0, double x1, double x2, double x3, double t) Evaluate a cubic Bézier curve according to control points `x0`, `x1`, `x2` and `x3` and return the position at parametric position `t` of the curve.
static float[]	eval(float[] p0, float[] p1, float[] p2, float[] p3, double t) Evaluate a cubic Bézier curve according to control points `p0`, `p1`, `p2` and `p3` and return the position at parametric position `t` of the curve.
static org.graphstream.ui.geom.Point2	eval(org.graphstream.ui.geom.Point2 p0, org.graphstream.ui.geom.Point2 p1, org.graphstream.ui.geom.Point2 p2, org.graphstream.ui.geom.Point2 p3, double t) Evaluate a cubic Bézier curve according to control points `p0`, `p1`, `p2` and `p3` and return the position at parametric position `t` of the curve.
static org.graphstream.ui.geom.Point2	eval(org.graphstream.ui.geom.Point2 p0, org.graphstream.ui.geom.Point2 p1, org.graphstream.ui.geom.Point2 p2, org.graphstream.ui.geom.Point2 p3, double t, org.graphstream.ui.geom.Point2 result) Evaluate a cubic Bézier curve according to control points `p0`, `p1`, `p2` and `p3` and store the position at parametric position `t` of the curve in `result`.
static org.graphstream.ui.geom.Point3	eval(org.graphstream.ui.geom.Point3 p0, org.graphstream.ui.geom.Point3 p1, org.graphstream.ui.geom.Point3 p2, org.graphstream.ui.geom.Point3 p3, double t) Evaluate a cubic Bézier curve according to control points `p0`, `p1`, `p2` and `p3` and return the position at parametric position `t` of the curve.
static float[]	perpendicular(float[] p0, float[] p1, float[] p2, float[] p3, double t) The perpendicular vector to the curve defined by control points `p0`, `p1`, `p2` and `p3` at parametric position `t`.
static org.graphstream.ui.geom.Vector2	perpendicular(org.graphstream.ui.geom.Point2 p0, org.graphstream.ui.geom.Point2 p1, org.graphstream.ui.geom.Point2 p2, org.graphstream.ui.geom.Point2 p3, double t) The perpendicular vector to the curve defined by control points `p0`, `p1`, `p2` and `p3` at parametric position `t`.
static org.graphstream.ui.geom.Vector2	perpendicular(org.graphstream.ui.geom.Point2 p0, org.graphstream.ui.geom.Point2 p1, org.graphstream.ui.geom.Point2 p2, org.graphstream.ui.geom.Point2 p3, double t, org.graphstream.ui.geom.Vector2 result) Store in `result` the perpendicular vector to the curve defined by control points `p0`, `p1`, `p2` and `p3` at parametric position `t`.

Methods inherited from class java.lang.Object

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

Constructor Detail

CubicCurve

public CubicCurve()

Method Detail

eval

public static double eval(double x0,
                          double x1,
                          double x2,
                          double x3,
                          double t)

Evaluate a cubic Bézier curve according to control points `x0`, `x1`, `x2` and `x3` and return the position at parametric position `t` of the curve.

Returns:

The coordinate at parametric position `t` on the curve.

eval

public static org.graphstream.ui.geom.Point2 eval(org.graphstream.ui.geom.Point2 p0,
                                                  org.graphstream.ui.geom.Point2 p1,
                                                  org.graphstream.ui.geom.Point2 p2,
                                                  org.graphstream.ui.geom.Point2 p3,
                                                  double t)

Evaluate a cubic Bézier curve according to control points `p0`, `p1`, `p2` and `p3` and return the position at parametric position `t` of the curve.

Returns:

The point at parametric position `t` on the curve.

eval

public static org.graphstream.ui.geom.Point3 eval(org.graphstream.ui.geom.Point3 p0,
                                                  org.graphstream.ui.geom.Point3 p1,
                                                  org.graphstream.ui.geom.Point3 p2,
                                                  org.graphstream.ui.geom.Point3 p3,
                                                  double t)

Evaluate a cubic Bézier curve according to control points `p0`, `p1`, `p2` and `p3` and return the position at parametric position `t` of the curve.

Returns:

The point at parametric position `t` on the curve.

eval

public static float[] eval(float[] p0,
                           float[] p1,
                           float[] p2,
                           float[] p3,
                           double t)

Evaluate a cubic Bézier curve according to control points `p0`, `p1`, `p2` and `p3` and return the position at parametric position `t` of the curve.

Returns:

The point at parametric position `t` on the curve.

eval

public static org.graphstream.ui.geom.Point2 eval(org.graphstream.ui.geom.Point2 p0,
                                                  org.graphstream.ui.geom.Point2 p1,
                                                  org.graphstream.ui.geom.Point2 p2,
                                                  org.graphstream.ui.geom.Point2 p3,
                                                  double t,
                                                  org.graphstream.ui.geom.Point2 result)

Evaluate a cubic Bézier curve according to control points `p0`, `p1`, `p2` and `p3` and store the position at parametric position `t` of the curve in `result`.

Returns:

the given reference to `result`.

derivative

public static double derivative(double x0,
                                double x1,
                                double x2,
                                double x3,
                                double t)

Derivative of a cubic Bézier curve according to control points `x0`, `x1`, `x2` and `x3` at parametric position `t` of the curve.

Returns:

The derivative at parametric position `t` on the curve.

derivative

public static org.graphstream.ui.geom.Point2 derivative(org.graphstream.ui.geom.Point2 p0,
                                                        org.graphstream.ui.geom.Point2 p1,
                                                        org.graphstream.ui.geom.Point2 p2,
                                                        org.graphstream.ui.geom.Point3 p3,
                                                        double t)

Derivative point of a cubic Bézier curve according to control points `x0`, `x1`, `x2` and `x3` at parametric position `t` of the curve.

Returns:

The derivative point at parametric position `t` on the curve.

derivative

public static org.graphstream.ui.geom.Point2 derivative(org.graphstream.ui.geom.Point2 p0,
                                                        org.graphstream.ui.geom.Point2 p1,
                                                        org.graphstream.ui.geom.Point2 p2,
                                                        org.graphstream.ui.geom.Point3 p3,
                                                        double t,
                                                        org.graphstream.ui.geom.Point2 result)

Store in `result` the derivative point of a cubic Bézier curve according to control points `x0`, `x1`, `x2` and `x3` at parametric position `t` of the curve.

Returns:

the given reference to `result`.

perpendicular

public static org.graphstream.ui.geom.Vector2 perpendicular(org.graphstream.ui.geom.Point2 p0,
                                                            org.graphstream.ui.geom.Point2 p1,
                                                            org.graphstream.ui.geom.Point2 p2,
                                                            org.graphstream.ui.geom.Point2 p3,
                                                            double t)

The perpendicular vector to the curve defined by control points `p0`, `p1`, `p2` and `p3` at parametric position `t`.

Returns:

A vector perpendicular to the curve at position `t`.

perpendicular

public static org.graphstream.ui.geom.Vector2 perpendicular(org.graphstream.ui.geom.Point2 p0,
                                                            org.graphstream.ui.geom.Point2 p1,
                                                            org.graphstream.ui.geom.Point2 p2,
                                                            org.graphstream.ui.geom.Point2 p3,
                                                            double t,
                                                            org.graphstream.ui.geom.Vector2 result)

Store in `result` the perpendicular vector to the curve defined by control points `p0`, `p1`, `p2` and `p3` at parametric position `t`.

Returns:

the given reference to `result`.

perpendicular

public static float[] perpendicular(float[] p0,
                                    float[] p1,
                                    float[] p2,
                                    float[] p3,
                                    double t)

The perpendicular vector to the curve defined by control points `p0`, `p1`, `p2` and `p3` at parametric position `t`.

Returns:

A vector perpendicular to the curve at position `t`.