Package com.itextpdf.awt.geom.gl

Class Crossing

  • public class Crossing
extends java.lang.Object

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
      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

      Fields 
      Modifier and Type Field Description
      static int CROSSING
      Rectangle cross segment
      (package private) static double DELTA
      Allowable tolerance for bounds comparison
      (package private) static double ROOT_DELTA
      If roots have distance less then ROOT_DELTA they are double
      (package private) static int UNKNOWN
      Unknown crossing result

    • Constructor Summary

      Constructors 
      Constructor Description
      Crossing()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      (package private) static int crossBound​(double[] bound, int bc, double py1, double py2)
      Returns are bounds intersect or not intersect rectangle
      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
      (package private) static int fixRoots​(double[] res, int rc)
      Excludes double roots.
      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
      (package private) static void sortBound​(double[] bound, int bc)
      Sort bound array

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • DELTA

        static final double DELTA
        Allowable tolerance for bounds comparison
        See Also:
        Constant Field Values

      • ROOT_DELTA

        static final double ROOT_DELTA
        If roots have distance less then ROOT_DELTA they are double
        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

      • fixRoots

        static int fixRoots​(double[] res,
                    int rc)
        Excludes double roots. Roots are double if they lies enough close with each other.
        Parameters:
        res - - the roots
        rc - - the roots count
        Returns:
        new roots count

      • 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

      • sortBound

        static void sortBound​(double[] bound,
                      int bc)
        Sort bound array

      • crossBound

        static int crossBound​(double[] bound,
                      int bc,
                      double py1,
                      double py2)
        Returns are bounds intersect or not intersect rectangle

      • 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