com.itextpdf.awt.geom.gl
Class Crossing

java.lang.Object
  com.itextpdf.awt.geom.gl.Crossing

public class Crossing
extends Object

Nested Class Summary

static class	Crossing.CubicCurve CubicCurve class provides basic functionality to find curve crossing and calculating bounds
static class	Crossing.QuadCurve QuadCurve class provides basic functionality to find curve crossing and calculating bounds

Field Summary

static int

CROSSING Rectangle cross segment

Constructor Summary

Crossing()

Method Summary

static int	crossCubic(double x1, double y1, double cx1, double cy1, double cx2, double cy2, double x2, double y2, double x, double y) Returns how many times ray from point (x,y) cross cubic curve
static int	crossLine(double x1, double y1, double x2, double y2, double x, double y) Returns how many times ray from point (x,y) cross line.
static int	crossPath(PathIterator p, double x, double y) Returns how many times ray from point (x,y) cross path
static int	crossQuad(double x1, double y1, double cx, double cy, double x2, double y2, double x, double y) Returns how many times ray from point (x,y) cross quard curve
static int	crossShape(Shape s, double x, double y) Returns how many times ray from point (x,y) cross shape
static int	intersectCubic(double x1, double y1, double cx1, double cy1, double cx2, double cy2, double x2, double y2, double rx1, double ry1, double rx2, double ry2) Returns how many times rectangle stripe cross cubic curve or the are intersect
static int	intersectLine(double x1, double y1, double x2, double y2, double rx1, double ry1, double rx2, double ry2) Returns how many times rectangle stripe cross line or the are intersect
static int	intersectPath(PathIterator p, double x, double y, double w, double h) Returns how many times rectangle stripe cross path or the are intersect
static int	intersectQuad(double x1, double y1, double cx, double cy, double x2, double y2, double rx1, double ry1, double rx2, double ry2) Returns how many times rectangle stripe cross quad curve or the are intersect
static int	intersectShape(Shape s, double x, double y, double w, double h) Returns how many times rectangle stripe cross shape or the are intersect
static boolean	isInsideEvenOdd(int cross) Returns true if cross count correspond inside location for even-odd path rule
static boolean	isInsideNonZero(int cross) Returns true if cross count correspond inside location for non zero path rule
static boolean	isZero(double val) Returns true if value enough small
static int	solveCubic(double[] eqn, double[] res) Solves cubic equation
static int	solveQuad(double[] eqn, double[] res) Solves quadratic equation

Methods inherited from class java.lang.Object

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

Field Detail

CROSSING

public static final int CROSSING

Rectangle cross segment

See Also:

Constant Field Values

Constructor Detail

Crossing

public Crossing()

Method Detail

solveQuad

public static int solveQuad(double[] eqn,
                            double[] res)

Solves quadratic equation

Parameters:

eqn - - the coefficients of the equation

res - - the roots of the equation

Returns:

a number of roots

solveCubic

public static int solveCubic(double[] eqn,
                             double[] res)

Solves cubic equation

Parameters:

eqn - - the coefficients of the equation

res - - the roots of the equation

Returns:

a number of roots

crossLine

public static int crossLine(double x1,
                            double y1,
                            double x2,
                            double y2,
                            double x,
                            double y)

Returns how many times ray from point (x,y) cross line.

crossQuad

public static int crossQuad(double x1,
                            double y1,
                            double cx,
                            double cy,
                            double x2,
                            double y2,
                            double x,
                            double y)

Returns how many times ray from point (x,y) cross quard curve

crossCubic

public static int crossCubic(double x1,
                             double y1,
                             double cx1,
                             double cy1,
                             double cx2,
                             double cy2,
                             double x2,
                             double y2,
                             double x,
                             double y)

Returns how many times ray from point (x,y) cross cubic curve

crossPath

public static int crossPath(PathIterator p,
                            double x,
                            double y)

Returns how many times ray from point (x,y) cross path

crossShape

public static int crossShape(Shape s,
                             double x,
                             double y)

Returns how many times ray from point (x,y) cross shape

isZero

public static boolean isZero(double val)

Returns true if value enough small

intersectLine

public static int intersectLine(double x1,
                                double y1,
                                double x2,
                                double y2,
                                double rx1,
                                double ry1,
                                double rx2,
                                double ry2)

Returns how many times rectangle stripe cross line or the are intersect

intersectQuad

public static int intersectQuad(double x1,
                                double y1,
                                double cx,
                                double cy,
                                double x2,
                                double y2,
                                double rx1,
                                double ry1,
                                double rx2,
                                double ry2)

Returns how many times rectangle stripe cross quad curve or the are intersect

intersectCubic

public static int intersectCubic(double x1,
                                 double y1,
                                 double cx1,
                                 double cy1,
                                 double cx2,
                                 double cy2,
                                 double x2,
                                 double y2,
                                 double rx1,
                                 double ry1,
                                 double rx2,
                                 double ry2)

Returns how many times rectangle stripe cross cubic curve or the are intersect

intersectPath

public static int intersectPath(PathIterator p,
                                double x,
                                double y,
                                double w,
                                double h)

Returns how many times rectangle stripe cross path or the are intersect

intersectShape

public static int intersectShape(Shape s,
                                 double x,
                                 double y,
                                 double w,
                                 double h)

Returns how many times rectangle stripe cross shape or the are intersect

isInsideNonZero

public static boolean isInsideNonZero(int cross)

Returns true if cross count correspond inside location for non zero path rule

isInsideEvenOdd

public static boolean isInsideEvenOdd(int cross)

Returns true if cross count correspond inside location for even-odd path rule