Package snap.geom

Class Quad

java.lang.Object

snap.geom.Shape

snap.geom.Segment

snap.geom.Quad

public class Quad
extends Segment

A Segment representing a Quadratic curve.

Field Summary

Fields inherited from class snap.geom.Segment

x0, x1, y0, y1

Fields inherited from class snap.geom.Shape

_bounds, WIND_EVEN_ODD, WIND_NON_ZERO

Constructor Summary

Constructors

Constructor	Description
Quad(double aX0, double aY0, double aCPX, double aCPY, double aX1, double aY1)	Creates a new Quad.

Method Summary

Modifier and Type	Method	Description
Quad	createReverse()	Creates and returns the reverse of this segement.
static int	crossings(double x0, double y0, double xc, double yc, double x1, double y1, double px, double py, int level)	Returns the number of crossings for the ray from given point extending to the right.
boolean	equals(Object anObj)	Standard equals implementation.
protected double	getArcLengthImpl()	Calculates and returns length of this segment.
static Rect	getBounds(double x0, double y0, double xc0, double yc0, double x1, double y1, Rect aRect)	Returns the bounds for given quad points.
static Rect	getBounds2(double x0, double y0, double x1, double y1, double x2, double y2, Rect aRect)	Returns the bounds of the give quadratic.
protected Rect	getBoundsImpl()	Returns the bounds.
static double	getDistanceSquared(double x0, double y0, double xc0, double yc0, double x1, double y1, double aX, double aY)	Returns the minimum distance from the given point to the curve.
double[]	getEndCoords(double[] coords)	Returns the point coords.
SegHit	getHit(Segment aSeg)	Returns the hit for given segment.
PathIter	getPathIter(Transform aT)	Returns a path iterator.
Point[]	getPoints()	Returns the points.
double	getX(double aLoc)	Returns the x value at given parametric location.
double	getY(double aLoc)	Returns the y value at given parametric location.
static boolean	intersectsLine(double x0, double y0, double xc0, double yc0, double x1, double y1, double px0, double py0, double px1, double py1)	Returns whether Quad for given points is intersected by line with given points.
static boolean	intersectsQuad(double x0, double y0, double xc0, double yc0, double x1, double y1, double px0, double py0, double pxc0, double pyc0, double px1, double py1)	Returns whether Quad for given points is intersected by Quad with given points.
static boolean	isLine(double x0, double y0, double xc0, double yc0, double x1, double y1)	Returns whether Quad for given points is effectively a line.
boolean	matches(Object anObj)	Returns whether quad is equal to another, regardless of direction.
void	setPoints(double aX0, double aY0, double aCPX, double aCPY, double aX1, double aY1)	Sets the quad points.
Quad	split(double aLoc)	Splits this Quad at given parametric location and return the remainder.

Methods inherited from class snap.geom.Segment

containsSeg, crossesSeg, equals, getArcLength, getHitPoint, getPointAndAngle, getX0, getX1, getY0, getY1, intersectsSeg, newSegmentForSegAndPoints

Methods inherited from class snap.geom.Shape

addShapes, contains, contains, contains, contains, copyFor, copyFor, copyForBounds, getBounds, getCrossings, getDistance, getFlattenedShape, getFlattenedShape, getHeight, getNotSelfIntersectingShape, getSvgString, getWidth, getX, getY, intersects, intersects, intersects, intersectShapes, isClosed, isFlat, isMultiCycle, isSelfIntersecting, isSingleCycle, shapeChanged, subtractShapes, toString

Methods inherited from class java.lang.Object

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

Constructor Details

Quad

public Quad(double aX0,
 double aY0,
 double aCPX,
 double aCPY,
 double aX1,
 double aY1)

Creates a new Quad.

Method Details

getPoints

public Point[] getPoints()

Returns the points.

Overrides:

getPoints in class Segment

setPoints

public void setPoints(double aX0,
 double aY0,
 double aCPX,
 double aCPY,
 double aX1,
 double aY1)

Sets the quad points.

getEndCoords

public double[] getEndCoords(double[] coords)

Returns the point coords.

Overrides:

getEndCoords in class Segment

getArcLengthImpl

protected double getArcLengthImpl()

Calculates and returns length of this segment.

Specified by:

getArcLengthImpl in class Segment

getBoundsImpl

protected Rect getBoundsImpl()

Returns the bounds.

Overrides:

getBoundsImpl in class Shape

getPathIter

public PathIter getPathIter(Transform aT)

Returns a path iterator.

Specified by:

getPathIter in class Shape

getX

public double getX(double aLoc)

Returns the x value at given parametric location.

Specified by:

getX in class Segment

getY

public double getY(double aLoc)

Returns the y value at given parametric location.

Specified by:

getY in class Segment

split

public Quad split(double aLoc)

Splits this Quad at given parametric location and return the remainder.

Specified by:

split in class Segment

createReverse

public Quad createReverse()

Creates and returns the reverse of this segement.

Specified by:

createReverse in class Segment

equals

public boolean equals(Object anObj)

Standard equals implementation.

Overrides:

equals in class Object

matches

public boolean matches(Object anObj)

Returns whether quad is equal to another, regardless of direction.

Specified by:

matches in class Segment

getHit

public SegHit getHit(Segment aSeg)

Returns the hit for given segment.

Overrides:

getHit in class Segment

getBounds

public static Rect getBounds(double x0,
 double y0,
 double xc0,
 double yc0,
 double x1,
 double y1,
 Rect aRect)

Returns the bounds for given quad points.

getBounds2

public static Rect getBounds2(double x0,
 double y0,
 double x1,
 double y1,
 double x2,
 double y2,
 Rect aRect)

Returns the bounds of the give quadratic.

getDistanceSquared

public static double getDistanceSquared(double x0,
 double y0,
 double xc0,
 double yc0,
 double x1,
 double y1,
 double aX,
 double aY)

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

crossings

public static int crossings(double x0,
 double y0,
 double xc,
 double yc,
 double x1,
 double y1,
 double px,
 double py,
 int level)

Returns the number of crossings for the ray from given point extending to the right.

isLine

public static boolean isLine(double x0,
 double y0,
 double xc0,
 double yc0,
 double x1,
 double y1)

Returns whether Quad for given points is effectively a line.

intersectsLine

public static boolean intersectsLine(double x0,
 double y0,
 double xc0,
 double yc0,
 double x1,
 double y1,
 double px0,
 double py0,
 double px1,
 double py1)

Returns whether Quad for given points is intersected by line with given points.

intersectsQuad

public static boolean intersectsQuad(double x0,
 double y0,
 double xc0,
 double yc0,
 double x1,
 double y1,
 double px0,
 double py0,
 double pxc0,
 double pyc0,
 double px1,
 double py1)

Returns whether Quad for given points is intersected by Quad with given points.