Package com.inductiveautomation.rm.graphics

Class RMQuadratic

java.lang.Object

com.inductiveautomation.rm.graphics.RMLine

com.inductiveautomation.rm.graphics.RMQuadratic

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

RMBezier

public class RMQuadratic
extends RMLine

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

Field Summary

Fields

Modifier and Type	Field	Description
RMPoint	_cp1

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

_ep, _sp

Constructor Summary

Constructors

Constructor	Description
RMQuadratic()	Creates a new quadratic curve.
RMQuadratic(double x1, double y1, double x2, double y2, double x3, double y3)	Creates a new quadratic curve for this gvein start point, control point and end point.
RMQuadratic(RMPoint startPoint, RMPoint controlPoint, RMPoint endPoint)	Creates a new quadratic curve for this gvein start point, control point and end point.

Method Summary

Modifier and Type	Method	Description
float	getArcLength(float start, float end)	Returns the arc length of the segment up to parametric value t
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, 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	getDistanceQuadratic(RMPoint aPoint)	Returns the minimum distance from the given point to the curve.
RMMath.RMFunc	getInverseArcLengthFunction()	Returns an RMFunc which calculates t for a percentage length along the curve.
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.
float	getParameterForLength(float l)	Returns parametric point t that corresponds to a given length along the curve.
RMPoint	getPoint(double t, RMPoint aPoint)	Returns the point on this curve at the parametric location t (defined 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.
void	setCurve(double x1, double y1, double x2, double y2, double x3, double y3)	Sets the curve values.
void	setCurve(RMPoint p1, RMPoint p2, RMPoint p3)	Sets the curve values.
void	subdivide(RMQuadratic left, RMQuadratic right)	Subdivides this curve into the given left and right curves.

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

clone, getAngle, getArcLength, getArcLength, getBounds, getDistanceLine, getDistanceLineSquared, getDistanceLineSquared, getHead, getHitInfo, getHitInfo, getHitInfo, getLastX, getLastY, getPoint, getTail, getTangent, setEnd, setStart, toString

Methods inherited from class java.lang.Object

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

Field Detail

_cp1

public RMPoint _cp1

Constructor Detail

RMQuadratic

public RMQuadratic()

Creates a new quadratic curve.

RMQuadratic

public RMQuadratic(RMPoint startPoint,
                   RMPoint controlPoint,
                   RMPoint endPoint)

Creates a new quadratic curve for this gvein start point, control point and end point.

RMQuadratic

public RMQuadratic(double x1,
                   double y1,
                   double x2,
                   double y2,
                   double x3,
                   double y3)

Creates a new quadratic curve for this gvein start point, control point and end point.

Method Detail

setCurve

public void setCurve(double x1,
                     double y1,
                     double x2,
                     double y2,
                     double x3,
                     double y3)

Sets the curve values.

setCurve

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

Sets the curve values.

getPoint

public RMPoint getPoint(double t,
                        RMPoint aPoint)

Returns the point on this curve at the parametric location t (defined from 0-1).

Overrides:

getPoint in class RMLine

getDistance

public double getDistance(RMPoint aPoint)

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

Overrides:

getDistance in class RMLine

getDistanceQuadratic

public double getDistanceQuadratic(RMPoint aPoint)

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

getPointCount

public int getPointCount()

Returns the point count of segment.

Overrides:

getPointCount in class RMLine

getPointX

public double getPointX(int anIndex)

Returns the x of point at given index.

Overrides:

getPointX in class RMLine

getPointY

public double getPointY(int anIndex)

Returns the y of point at given index.

Overrides:

getPointY in class RMLine

subdivide

public void subdivide(RMQuadratic left,
                      RMQuadratic right)

Subdivides this curve into the given left and right curves.

getMinX

public double getMinX()

Returns the min x point of this bezier.

Overrides:

getMinX in class RMLine

getMinY

public double getMinY()

Returns the min y point of this bezier.

Overrides:

getMinY in class RMLine

getMaxX

public double getMaxX()

Returns the max x point of this bezier.

Overrides:

getMaxX in class RMLine

getMaxY

public double getMaxY()

Returns the max y point of this bezier.

Overrides:

getMaxY in class RMLine

getBounds

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

Returns the bounds.

Overrides:

getBounds in class RMLine

getBounds

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

Returns the bounds of the bezier.

getArcLength

public float getArcLength(float start,
                          float end)

Returns the arc length of the segment up to parametric value t

Overrides:

getArcLength in class RMLine

getArcLengthFunction

public RMMath.RMFunc getArcLengthFunction()

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

getParameterForLength

public float getParameterForLength(float l)

Returns parametric point t that corresponds to a given length along the curve. l is in the range [0-1] (ie. percentage of total arclength)

Overrides:

getParameterForLength in class RMLine

getInverseArcLengthFunction

public RMMath.RMFunc getInverseArcLengthFunction()

Returns an RMFunc which calculates t for a percentage length along the curve.