Package com.inductiveautomation.rm.graphics

Class RMBezier

java.lang.Object

com.inductiveautomation.rm.graphics.RMLine

com.inductiveautomation.rm.graphics.RMQuadratic

com.inductiveautomation.rm.graphics.RMBezier

All Implemented Interfaces:

java.lang.Cloneable

public class RMBezier
extends RMQuadratic

This class models a simple bezier curve, providing methods for extracting points, distance calculation, bisection, hit detection and such.

Field Summary

Fields

Modifier and Type	Field	Description
RMPoint	_cp2

Fields inherited from class com.inductiveautomation.rm.graphics.RMQuadratic

_cp1

Fields inherited from class com.inductiveautomation.rm.graphics.RMLine

_ep, _sp

Constructor Summary

Constructors

Constructor	Description
RMBezier()	Creates a new bezier.
RMBezier(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)	Creates a new bezier from the given start point, control points and end point.
RMBezier(RMPoint startPoint, RMPoint controlPoint1, RMPoint controlPoint2, RMPoint endPoint)	Creates a new bezier from the given start point, control points and end point.

Method Summary

Modifier and Type	Method	Description
RMMath.RMFunc	getArcLengthFunction()	Returns an RMFunc which calculates the arclength of the curve up to t.
static void	getBounds(double x0, double y0, double x1, double y1, double x2, double y2, double x3, double y3, java.awt.geom.Rectangle2D aRect)	Returns the bounds of the bezier.
void	getBounds(java.awt.geom.Rectangle2D aRect)	Returns the bounds.
double	getDistance(RMPoint aPoint)	Returns the minimum distance from the given point to this segment.
double	getDistanceBezier(RMPoint aPoint)	Returns the minimum distance from the given point to the curve.
RMLine	getHead(double t)	Returns a new line from this line's start point to given parametric location t (defined from 0-1) on this line.
RMHitInfo	getHitInfo(RMBezier aBezier)	Returns a hit info for this bezier and given bezier.
RMHitInfo	getHitInfo(RMLine aLine)	Returns the hit info for this bezier and a given line.
double	getMaxX()	Returns the max x point of this bezier.
double	getMaxY()	Returns the max y point of this bezier.
double	getMinX()	Returns the min x point of this bezier.
double	getMinY()	Returns the min y point of this bezier.
RMPoint	getPoint(double t, RMPoint aPoint)	Returns a specific point on the curve at the given parametric value (from 0-1).
int	getPointCount()	Returns the point count of segment.
double	getPointX(int anIndex)	Returns the x of point at given index.
double	getPointY(int anIndex)	Returns the y of point at given index.
RMLine	getTail(double t)	Returns a new line from given parametric location t (defined from 0-1) on this line to this line's end point.
void	setCurve(RMPoint p1, RMPoint p2, RMPoint p3, RMPoint p4)	Sets the values of the curve.
void	setEnd(double t)	Reset this curve's end point to the given parametric location (0-1).
void	setStart(double t)	Reset this curve's start point to the given parametric location (0-1).
void	subdivide(RMBezier left, RMBezier right, double t)	Returns a bezier curve from this curve's start point to the given parametric location (0-1).
java.lang.String	toString()	Returns a string representation of this bezier.

Methods inherited from class com.inductiveautomation.rm.graphics.RMQuadratic

getArcLength, getBounds, getDistanceQuadratic, getInverseArcLengthFunction, getParameterForLength, setCurve, setCurve, subdivide

Methods inherited from class com.inductiveautomation.rm.graphics.RMLine

clone, getAngle, getArcLength, getArcLength, getBounds, getDistanceLine, getDistanceLineSquared, getDistanceLineSquared, getHitInfo, getLastX, getLastY, getPoint, getTangent

Methods inherited from class java.lang.Object

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

Field Detail

_cp2

public RMPoint _cp2

Constructor Detail

RMBezier

public RMBezier()

Creates a new bezier.

RMBezier

public RMBezier(RMPoint startPoint,
                RMPoint controlPoint1,
                RMPoint controlPoint2,
                RMPoint endPoint)

Creates a new bezier from the given start point, control points and end point.

RMBezier

public RMBezier(double x1,
                double y1,
                double x2,
                double y2,
                double x3,
                double y3,
                double x4,
                double y4)

Creates a new bezier from the given start point, control points and end point.

Method Detail

setCurve

public void setCurve(RMPoint p1,
                     RMPoint p2,
                     RMPoint p3,
                     RMPoint p4)

Sets the values of the curve.

getPoint

public RMPoint getPoint(double t,
                        RMPoint aPoint)

Returns a specific point on the curve at the given parametric value (from 0-1).

Overrides:

getPoint in class RMQuadratic

getPointCount

public int getPointCount()

Returns the point count of segment.

Overrides:

getPointCount in class RMQuadratic

getPointX

public double getPointX(int anIndex)

Returns the x of point at given index.

Overrides:

getPointX in class RMQuadratic

getPointY

public double getPointY(int anIndex)

Returns the y of point at given index.

Overrides:

getPointY in class RMQuadratic

getDistance

public double getDistance(RMPoint aPoint)

Returns the minimum distance from the given point to this segment.

Overrides:

getDistance in class RMQuadratic

getDistanceBezier

public double getDistanceBezier(RMPoint aPoint)

Returns the minimum distance from the given point to the curve.

getMinX

public double getMinX()

Returns the min x point of this bezier.

Overrides:

getMinX in class RMQuadratic

getMinY

public double getMinY()

Returns the min y point of this bezier.

Overrides:

getMinY in class RMQuadratic

getMaxX

public double getMaxX()

Returns the max x point of this bezier.

Overrides:

getMaxX in class RMQuadratic

getMaxY

public double getMaxY()

Returns the max y point of this bezier.

Overrides:

getMaxY in class RMQuadratic

getBounds

public void getBounds(java.awt.geom.Rectangle2D aRect)

Returns the bounds.

Overrides:

getBounds in class RMQuadratic

getBounds

public static void getBounds(double x0,
                             double y0,
                             double x1,
                             double y1,
                             double x2,
                             double y2,
                             double x3,
                             double y3,
                             java.awt.geom.Rectangle2D aRect)

Returns the bounds of the bezier.

getHitInfo

public RMHitInfo getHitInfo(RMLine aLine)

Returns the hit info for this bezier and a given line.

Overrides:

getHitInfo in class RMLine

getHitInfo

public RMHitInfo getHitInfo(RMBezier aBezier)

Returns a hit info for this bezier and given bezier.

Overrides:

getHitInfo in class RMLine

getHead

public RMLine getHead(double t)

Returns a new line from this line's start point to given parametric location t (defined from 0-1) on this line.

Overrides:

getHead in class RMLine

getTail

public RMLine getTail(double t)

Returns a new line from given parametric location t (defined from 0-1) on this line to this line's end point.

Overrides:

getTail in class RMLine

subdivide

public void subdivide(RMBezier left,
                      RMBezier right,
                      double t)

Returns a bezier curve from this curve's start point to the given parametric location (0-1).

setEnd

public void setEnd(double t)

Reset this curve's end point to the given parametric location (0-1).

Overrides:

setEnd in class RMLine

setStart

public void setStart(double t)

Reset this curve's start point to the given parametric location (0-1).

Overrides:

setStart in class RMLine

getArcLengthFunction

public RMMath.RMFunc getArcLengthFunction()

Returns an RMFunc which calculates the arclength of the curve up to t.

Overrides:

getArcLengthFunction in class RMQuadratic

toString

public java.lang.String toString()

Returns a string representation of this bezier.

Overrides:

toString in class RMLine